enhancement: better contact detail screen ux

.idea/deploymentTargetSelector.xml

@@ -4,7 +4,7 @@
     <selectionStates>
       <SelectionState runConfigName="app">
         <option name="selectionMode" value="DROPDOWN" />
-        <DropdownSelection timestamp="2026-05-31T17:55:52.851171Z">
+        <DropdownSelection timestamp="2026-06-11T09:22:11.580091Z">
           <Target type="DEFAULT_BOOT">
             <handle>
               <DeviceId pluginId="PhysicalDevice" identifier="serial=48090DLAQ00119" />
@@ -13,40 +13,7 @@
         </DropdownSelection>
         <DialogSelection />
       </SelectionState>
-      <SelectionState runConfigName="getAll_baseline()">
-        <option name="selectionMode" value="DROPDOWN" />
-        <DropdownSelection timestamp="2026-05-31T17:55:52.851171Z">
-          <Target type="DEFAULT_BOOT">
-            <handle>
-              <DeviceId pluginId="PhysicalDevice" identifier="serial=48090DLAQ00119" />
-            </handle>
-          </Target>
-        </DropdownSelection>
-        <DialogSelection />
-      </SelectionState>
-      <SelectionState runConfigName="PaymentDaoBenchmark">
-        <option name="selectionMode" value="DROPDOWN" />
-        <DropdownSelection timestamp="2026-05-31T17:55:52.851171Z">
-          <Target type="DEFAULT_BOOT">
-            <handle>
-              <DeviceId pluginId="PhysicalDevice" identifier="serial=48090DLAQ00119" />
-            </handle>
-          </Target>
-        </DropdownSelection>
-        <DialogSelection />
-      </SelectionState>
-      <SelectionState runConfigName="concurrentReadWrite()">
-        <option name="selectionMode" value="DROPDOWN" />
-        <DropdownSelection timestamp="2026-05-31T17:55:52.851171Z">
-          <Target type="DEFAULT_BOOT">
-            <handle>
-              <DeviceId pluginId="PhysicalDevice" identifier="serial=48090DLAQ00119" />
-            </handle>
-          </Target>
-        </DropdownSelection>
-        <DialogSelection />
-      </SelectionState>
-      <SelectionState runConfigName="checkJournalMode()">
+      <SelectionState runConfigName="macrobenchmark">
         <option name="selectionMode" value="DROPDOWN" />
         <DropdownSelection timestamp="2026-05-31T17:55:52.851171Z">
           <Target type="DEFAULT_BOOT">

.idea/dictionaries/project.xml

@@ -2,17 +2,40 @@
   <dictionary name="project">
     <words>
       <w>Aead</w>
+      <w>Bech</w>
+      <w>Bitrefill</w>
+      <w>Español</w>
       <w>Nbits</w>
+      <w>Nostr</w>
       <w>Tink</w>
       <w>amboss</w>
+      <w>bech</w>
+      <w>bitcointxoko</w>
+      <w>btcpay</w>
+      <w>cltv</w>
+      <w>getnwckey</w>
+      <w>gudari</w>
+      <w>gudariwallet</w>
       <w>hkdf</w>
       <w>inflight</w>
+      <w>keyauth</w>
+      <w>lnaddr</w>
+      <w>lnaddress</w>
       <w>lnbc</w>
       <w>lnbits</w>
       <w>lnurlp</w>
+      <w>lnurlw</w>
       <w>msat</w>
+      <w>msats</w>
+      <w>nostr</w>
+      <w>nwccacherepository</w>
+      <w>satoshi</w>
       <w>satoshis</w>
       <w>sats</w>
+      <w>snackbar</w>
+      <w>snull</w>
+      <w>tink</w>
+      <w>walletconnect</w>
     </words>
   </dictionary>
 </component>

.idea/gradle.xml

@@ -10,6 +10,7 @@
           <set>
             <option value="$PROJECT_DIR$" />
             <option value="$PROJECT_DIR$/app" />
+            <option value="$PROJECT_DIR$/macrobenchmark" />
           </set>
         </option>
       </GradleProjectSettings>

app/build.gradle.kts

@@ -1,4 +1,9 @@
 import com.google.protobuf.gradle.*
+import java.util.Properties
+
+val localProps = Properties().apply {
+    load(rootProject.file("local.properties").inputStream())
+}
 
 configurations.all {
     resolutionStrategy {
@@ -12,49 +17,64 @@ plugins {
     alias(libs.plugins.kotlin.compose)
     alias(libs.plugins.ksp)
     alias(libs.plugins.protobuf)
+    alias(libs.plugins.kotlin.serialization)
 }
 
 android {
     namespace = "com.bitcointxoko.gudariwallet"
-    compileSdk {
-        version = release(36) {
-            minorApiLevel = 1
+    compileSdk = 37
+    splits {
+        abi {
+            isEnable = true
+            reset()                    // Clear all defaults
+            include("arm64-v8a")       // Specify desired ABIs
+            isUniversalApk = false
         }
     }
 
     defaultConfig {
         applicationId = "com.bitcointxoko.gudariwallet"
         minSdk = 26
-        targetSdk = 36
+        targetSdk = 37
         versionCode = 1
         versionName = "0.1.0"
-
-        // testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+        androidResources {
+            @Suppress("UnstableApiUsage")
+            localeFilters += setOf("en", "es", "eu")
+        }
         testInstrumentationRunner = "androidx.benchmark.junit4.AndroidBenchmarkRunner"
-        testInstrumentationRunnerArguments["androidx.benchmark.suppressErrors"] = "ACTIVITY-MISSING"
     }
 
-    testBuildType = "benchmark"
+    signingConfigs {
+        create("release") {
+            storeFile = file(localProps["KEYSTORE_PATH"] as String)
+            storePassword = localProps["KEYSTORE_PASSWORD"] as String
+            keyAlias = localProps["KEY_ALIAS"] as String
+            keyPassword = localProps["KEY_PASSWORD"] as String
+        }
+    }
 
     buildTypes {
         release {
-            isMinifyEnabled = false
+            isMinifyEnabled = true          // Enables R8/ProGuard shrinking
+            isShrinkResources = true        // Removes unused resources
             proguardFiles(
                 getDefaultProguardFile("proguard-android-optimize.txt"),
                 "proguard-rules.pro"
             )
+            signingConfig = signingConfigs.getByName("release")
         }
         create("benchmark") {
             initWith(buildTypes.getByName("release"))
+            isMinifyEnabled = false       // benchmarks must not be minified
+            //noinspection NotShrinkingResources
+            isShrinkResources = false     // or results are meaningless
             signingConfig = signingConfigs.getByName("debug")  // sign with debug key for easy deployment
-            installation {
-                enableBaselineProfile = false   // ← disables profile embedding for this build type only
-            }
         }
     }
     compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_11
-        targetCompatibility = JavaVersion.VERSION_11
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
     }
     buildFeatures {
         compose = true
@@ -67,13 +87,17 @@ android {
             }
         }
         getByName("debug") {
-            java.srcDirs("build/generated/ksp/debug/kotlin")
+            java.directories.add("build/generated/ksp/debug/kotlin")
+        }
+        getByName("test") {
+            java.srcDirs("src/test/java")
+            kotlin.srcDirs("src/test/java")
         }
         getByName("release") {
-            java.srcDirs("build/generated/ksp/release/kotlin")
+            java.directories.add("build/generated/ksp/release/kotlin")
         }
         getByName("benchmark") {
-            java.srcDirs("build/generated/ksp/benchmark/kotlin")
+            java.directories.add("build/generated/ksp/benchmark/kotlin")
         }
     }
 }
@@ -82,6 +106,7 @@ androidComponents {
     onVariants(selector().withBuildType("benchmark")) { variant ->
         variant.packaging.resources.excludes.add("baseline-prof.txt")
         variant.packaging.resources.excludes.add("baseline.profm")
+        variant.packaging.resources.excludes.add("**/*.profm")
     }
 }
 
@@ -98,11 +123,12 @@ dependencies {
     implementation(libs.androidx.material3)
     implementation(libs.androidx.ui)
     testImplementation(libs.junit)
+    testImplementation(libs.kotlin.test)
+    testImplementation(libs.mockk)
     androidTestImplementation(platform(libs.androidx.compose.bom))
     androidTestImplementation(libs.androidx.compose.ui.test.junit4)
-    implementation(libs.androidx.benchmark.junit4)
+    androidTestImplementation(libs.androidx.benchmark.junit4)
     androidTestImplementation(libs.androidx.runner)
-    androidTestImplementation(libs.androidx.test.ext.junit)
     androidTestImplementation(libs.androidx.espresso.core)
     androidTestImplementation(libs.androidx.junit)
     debugImplementation(libs.androidx.compose.ui.test.manifest)
@@ -110,9 +136,9 @@ dependencies {
 
     // Networking
     implementation(libs.retrofit2.retrofit)
-    implementation(libs.converter.gson)
+    implementation(libs.converter.kotlinx.serialization)
     implementation(libs.okhttp)
-    implementation(libs.logging.interceptor)
+    debugImplementation(libs.logging.interceptor)
 
     // Coroutines
     implementation(libs.kotlinx.coroutines.android)
@@ -141,7 +167,7 @@ dependencies {
     implementation(libs.androidx.biometric)
 
     // JSON
-    implementation(libs.gson)
+    implementation(libs.kotlinx.serialization.json)
 
     // icons
     implementation(libs.androidx.material.icons.extended)
@@ -151,7 +177,6 @@ dependencies {
 
     //Navigation
     implementation(libs.androidx.navigation.compose)
-
     implementation(libs.androidx.appcompat)
 
     // animations
@@ -159,6 +184,8 @@ dependencies {
 
     // secp256k1
     implementation(libs.secp256k1.kmp.android)
+    testImplementation(libs.secp256k1.kmp.jvm)
+    testImplementation("fr.acinq.secp256k1:secp256k1-kmp-jni-jvm:0.15.0")
 
     // lyricist
     implementation(libs.lyricist)
@@ -168,6 +195,11 @@ dependencies {
 
     // timber
     implementation(libs.timber)
+
+    // leakcanary
+    debugImplementation(libs.leakcanary.android)
+
+    testImplementation("org.json:json:20240303")
 }
 
 protobuf {

app/proguard-rules.pro

@@ -1,21 +1,149 @@
-# Add project specific ProGuard rules here.
-# You can control the set of applied configuration files using the
-# proguardFiles setting in build.gradle.
+# ──────────────────────────────────────────────────────────────────
+# Protobuf lite
+# ──────────────────────────────────────────────────────────────────
+-keep class * extends com.google.protobuf.GeneratedMessageLite { *; }
+
+# ──────────────────────────────────────────────────────────────────
+# Google Tink 1.13.0
+# ──────────────────────────────────────────────────────────────────
+-keepclassmembers class * extends com.google.crypto.tink.shaded.protobuf.GeneratedMessageLite {
+    <fields>;
+}
+-keep class com.google.crypto.tink.KeyTemplates { *; }
+-keep class com.google.crypto.tink.StreamingAead { *; }
+-keep class com.google.crypto.tink.KeysetHandle { *; }
+-keep class com.google.crypto.tink.integration.android.AndroidKeysetManager { *; }
+-keep class com.google.crypto.tink.integration.android.AndroidKeysetManager$Builder { *; }
+-keep class com.google.crypto.tink.streamingaead.StreamingAeadConfig { *; }
+-keep class com.google.crypto.tink.streamingaead.AesGcmHkdfStreamingKeyManager { *; }
+-keep class com.google.crypto.tink.streamingaead.StreamingAeadWrapper { *; }
+-keep class com.google.crypto.tink.subtle.AesGcmHkdfStreaming { *; }
+-dontwarn com.google.crypto.tink.**
+
+# ──────────────────────────────────────────────────────────────────
+# kotlinx.serialization
+# The compiler plugin generates a $serializer inner class for every
+# @Serializable class. R8 must not remove or rename these — they are
+# looked up by name at runtime via SerializersModule.
+# ──────────────────────────────────────────────────────────────────
+-keepattributes *Annotation*, InnerClasses
+-keep class kotlinx.serialization.SerializersKt { *; }
+-dontnote kotlinx.serialization.**
+-dontwarn kotlinx.serialization.**
+
+# Keep generated serializers for all @Serializable classes in your app
+-keepclassmembers class com.bitcointxoko.gudariwallet.** {
+    kotlinx.serialization.KSerializer serializer(...);
+}
+
+# Keep the $serializer companion objects themselves
+-keep class com.bitcointxoko.gudariwallet.**$$serializer { *; }
+
+# Required for sealed class polymorphic serialization
+-keepclassmembers @kotlinx.serialization.Serializable class * {
+    *** Companion;
+    *** INSTANCE;
+    kotlinx.serialization.KSerializer serializer(...);
+}
+
+# ──────────────────────────────────────────────────────────────────
+# Retrofit 3.0.0
+# ──────────────────────────────────────────────────────────────────
+-keep,allowobfuscation,allowshrinking interface retrofit2.Call
+-keep,allowobfuscation,allowshrinking class retrofit2.Response
+-keep,allowobfuscation,allowshrinking class kotlin.coroutines.Continuation
+-keep,allowobfuscation,allowshrinking class * extends kotlin.coroutines.CoroutineContext$Element { *; }
+
+# ──────────────────────────────────────────────────────────────────
+# OkHttp 5.x / Okio
+# ──────────────────────────────────────────────────────────────────
+-keep class okhttp3.internal.publicsuffix.PublicSuffixDatabase { *; }
+-keepnames class okhttp3.** { *; }
+-dontwarn okhttp3.**
+-dontwarn okio.**
+-dontwarn javax.annotation.**
+-dontwarn org.codehaus.mojo.animal_sniffer.*
+
+# ──────────────────────────────────────────────────────────────────
+# secp256k1-kmp (JNI)
+# ──────────────────────────────────────────────────────────────────
+-keep class fr.acinq.secp256k1.** { *; }
+-keepclasseswithmembernames class * {
+    native <methods>;
+}
+
+# ──────────────────────────────────────────────────────────────────
+# ZXing 4.3.0
 #
-# For more details, see
-#   http://developer.android.com/guide/developing/tools/proguard.html
+# ZXing uses reflection to instantiate Reader subclasses by class name.
+# Only the classes your app actually exercises need to be kept.
+# A Lightning wallet only needs QR code scanning (QR_CODE format).
+# ──────────────────────────────────────────────────────────────────
 
-# If your project uses WebView with JS, uncomment the following
-# and specify the fully qualified class name to the JavaScript interface
-# class:
-#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
-#   public *;
-#}
+# Core entry points used directly via the API
+-keep class com.google.zxing.BarcodeFormat { *; }
+-keep class com.google.zxing.DecodeHintType { *; }
+-keep class com.google.zxing.Result { *; }
+-keep class com.google.zxing.ResultMetadataType { *; }
+-keep class com.google.zxing.MultiFormatReader { *; }
 
-# Uncomment this to preserve the line number information for
-# debugging stack traces.
-#-keepattributes SourceFile,LineNumberTable
+# QR code reader — instantiated reflectively by MultiFormatReader
+-keep class com.google.zxing.qrcode.QRCodeReader { *; }
+-keep class com.google.zxing.qrcode.decoder.** { *; }
+-keep class com.google.zxing.qrcode.detector.** { *; }
 
-# If you keep the line number information, uncomment this to
-# hide the original source file name.
-#-renamesourcefileattribute SourceFile
+# QR code generator
+-keep class com.google.zxing.qrcode.QRCodeWriter { *; }
+
+# Common infrastructure used by all readers
+-keep class com.google.zxing.common.** { *; }
+
+# Suppress warnings for unused format readers (1D barcodes, DataMatrix, etc.)
+# that are in the jar but not needed by a wallet app
+-dontwarn com.google.zxing.**
+
+# ──────────────────────────────────────────────────────────────────
+# Room 2.7.1
+# ──────────────────────────────────────────────────────────────────
+-keep @androidx.room.Entity class *
+-keep @androidx.room.Dao interface *
+-keep class * extends androidx.room.RoomDatabase { *; }
+-dontwarn androidx.room.**
+
+# ──────────────────────────────────────────────────────────────────
+# WorkManager 2.9.1
+# ──────────────────────────────────────────────────────────────────
+-keep class * extends androidx.work.InputMerger { *; }
+-keep class * extends androidx.work.Worker { *; }
+-keep class * extends androidx.work.CoroutineWorker { *; }
+-keep class * extends androidx.work.ListenableWorker { *; }
+-keep class * extends androidx.work.WorkerFactory { *; }
+# Keep specific classes explicitly as a safety net
+-keep class com.bitcointxoko.gudariwallet.sync.HistoricalSyncWorker { *; }
+-keep class com.bitcointxoko.gudariwallet.sync.HistoricalSyncWorker$Companion { *; }
+-keep class com.bitcointxoko.gudariwallet.sync.HistoricalSyncWorkerFactory { *; }
+
+# ──────────────────────────────────────────────────────────────────
+# Kotlin Coroutines 1.11.0
+# ──────────────────────────────────────────────────────────────────
+-keepnames class kotlinx.coroutines.internal.MainDispatcherFactory {}
+-keepnames class kotlinx.coroutines.CoroutineExceptionHandler {}
+-dontwarn kotlinx.coroutines.**
+-dontwarn kotlinx.coroutines.debug.*
+
+# ──────────────────────────────────────────────────────────────────
+# Lyricist 1.8.0
+# ──────────────────────────────────────────────────────────────────
+-keep class com.bitcointxoko.gudariwallet.**Strings { *; }
+-keep class com.bitcointxoko.gudariwallet.**Translations { *; }
+
+# ──────────────────────────────────────────────────────────────────
+# Timber 5.0.1
+# ──────────────────────────────────────────────────────────────────
+-dontwarn org.jetbrains.annotations.**
+
+# ──────────────────────────────────────────────────────────────────
+# Stack traces — upload mapping.txt to Play Console / Crashlytics
+# ──────────────────────────────────────────────────────────────────
+-keepattributes SourceFile,LineNumberTable
+-renamesourcefileattribute SourceFile

app/release/output-metadata.json

@@ -0,0 +1,26 @@
+{
+  "version": 3,
+  "artifactType": {
+    "type": "APK",
+    "kind": "Directory"
+  },
+  "applicationId": "com.bitcointxoko.gudariwallet",
+  "variantName": "release",
+  "elements": [
+    {
+      "type": "ONE_OF_MANY",
+      "filters": [
+        {
+          "filterType": "ABI",
+          "value": "arm64-v8a"
+        }
+      ],
+      "attributes": [],
+      "versionCode": 1,
+      "versionName": "0.1.0",
+      "outputFile": "app-arm64-v8a-release.apk"
+    }
+  ],
+  "elementType": "File",
+  "minSdkVersionForDexing": 26
+}

app/src/main/AndroidManifest.xml

@@ -10,16 +10,23 @@
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE_SPECIAL_USE" />
     <uses-permission android:name="android.permission.NFC" />
     <uses-permission android:name="android.permission.VIBRATE"/>
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
-    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
 
     <uses-feature android:name="android.hardware.camera" android:required="false" />
     <uses-feature android:name="android.hardware.nfc" android:required="false" />
     <uses-feature android:name="android.hardware.nfc.hce" android:required="false" />
 
+    <queries>
+        <!-- Allows resolveActivity() to see apps that handle the NWC URI scheme -->
+        <intent>
+            <action android:name="android.intent.action.VIEW" />
+            <data android:scheme="nostr+walletconnect" />
+        </intent>
+    </queries>
+
     <application
         android:name=".GudariWalletApplication"
-        android:allowBackup="true"
+        android:allowBackup="false"
+        android:dataExtractionRules="@xml/data_extraction_rules"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"

app/src/main/java/com/bitcointxoko/gudariwallet/GudariWalletApplication.kt

@@ -18,8 +18,8 @@ class GudariWalletApplication : Application(), Configuration.Provider {
     override val workManagerConfiguration: Configuration
         get() {
             val secrets      = EncryptedSecretStore(this)
-            val api          = LNbitsClient.create(secrets)
-            val repo         = LNbitsWalletRepository(api = api, secrets = secrets)
+            val client       = LNbitsClient(secrets)
+            val repo         = LNbitsWalletRepository(api = client.api, secrets = secrets)
             val paymentCache = PaymentCacheRepository(this)
             val syncStore    = HistoricalSyncStore(this)
             return Configuration.Builder()
@@ -29,7 +29,7 @@ class GudariWalletApplication : Application(), Configuration.Provider {
 
     override fun onCreate() {
         super.onCreate()
-        NotificationHelper.createChannels(this)  // moved from MainActivity
+        NotificationHelper.createChannels(this)
         if (BuildConfig.DEBUG) {
             Timber.plant(Timber.DebugTree())
         }

app/src/main/java/com/bitcointxoko/gudariwallet/MainActivity.kt

@@ -2,24 +2,18 @@ package com.bitcointxoko.gudariwallet
 
 import android.Manifest
 import android.app.PendingIntent
-import android.content.ActivityNotFoundException
 import android.content.Intent
 import android.content.IntentFilter
 import android.nfc.NfcAdapter
 import android.nfc.Tag
 import android.os.Build
 import android.os.Bundle
-import android.os.PowerManager
-import android.provider.Settings
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.activity.viewModels
-import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
 import androidx.compose.runtime.*
-import androidx.core.content.edit
-import androidx.core.net.toUri
 import androidx.lifecycle.lifecycleScope
 import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.stateIn
@@ -37,12 +31,17 @@ import kotlinx.coroutines.flow.MutableSharedFlow
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import cafe.adriel.lyricist.ProvideStrings
+import com.bitcointxoko.gudariwallet.data.AppLockStore
 import com.bitcointxoko.gudariwallet.data.HistoricalSyncStore
+import com.bitcointxoko.gudariwallet.ui.lock.BiometricLockScreen
 import com.bitcointxoko.gudariwallet.util.NotificationConstants
 
 class MainActivity : AppCompatActivity() {
 
     private lateinit var secretStore: EncryptedSecretStore
+    private lateinit var appLockStore: AppLockStore
+
+    private val isUnlocked = mutableStateOf(false)
 
     private val vm: WalletViewModel by viewModels {
         WalletViewModelFactory(application)
@@ -90,6 +89,7 @@ class MainActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         secretStore = EncryptedSecretStore(applicationContext)
+        appLockStore = AppLockStore(applicationContext)
         val syncStore = HistoricalSyncStore(applicationContext)
         val credentialsState = secretStore.credentials
             .stateIn(
@@ -97,6 +97,12 @@ class MainActivity : AppCompatActivity() {
                 started = SharingStarted.WhileSubscribed(5_000),
                 initialValue = null
             )
+        val appLockEnabledState = appLockStore.appLockEnabled
+            .stateIn(
+                scope = lifecycleScope,
+                started = SharingStarted.WhileSubscribed(5_000),
+                initialValue = true   // safe default: locked
+            )
 
         // Must be first — before any notification is posted
         // NotificationHelper.createChannels(applicationContext)
@@ -127,34 +133,49 @@ class MainActivity : AppCompatActivity() {
                     // ─────────────────────────────────────────────────────────────
 
                     val credentials by credentialsState.collectAsState()
+                    val appLockEnabled by appLockEnabledState.collectAsState()
                     val isOnboarded = credentials?.isOnboarded == true
 
-                    if (isOnboarded) {
-                        LaunchedEffect(Unit) {
-                            WalletNotificationService.start(this@MainActivity)
-                            requestNotificationPermissionIfNeeded()
+                    when {
+                        !isOnboarded -> {
+                            OnboardingScreen(
+                                secretStore = secretStore,
+                                syncStore = syncStore,
+                                appLockStore = appLockStore,
+                                onRequestNotificationPermission = { requestNotificationPermissionIfNeeded() },
+                                onComplete = {}
+                            )
+                        }
+                        appLockEnabled && !isUnlocked.value -> {
+                            BiometricLockScreen(
+                                onUnlocked = { isUnlocked.value = true }
+                            )
+                        }
+                        else -> {
+                            LaunchedEffect(Unit) {
+                                WalletNotificationService.start(this@MainActivity)
+                                requestNotificationPermissionIfNeeded()
+                            }
+                            WalletScreen(
+                                vm = vm,
+                                nfcVm = nfcVm,
+                                pendingPaymentHash = pendingPaymentHash,
+                                pendingNavigateToHistory = pendingNavigateToHistory,
+                                pendingPaymentUri = pendingPaymentUri,
+                                lyricist = lyricist
+                            )
                         }
-                        WalletScreen(
-                            vm                 = vm,
-                            nfcVm              = nfcVm,
-                            pendingPaymentHash = pendingPaymentHash,
-                            pendingNavigateToHistory = pendingNavigateToHistory,
-                            pendingPaymentUri  = pendingPaymentUri,
-                            lyricist           = lyricist
-                        )
-                    } else {
-                        OnboardingScreen(
-                            secretStore                     = secretStore,
-                            syncStore                       = syncStore,
-                            onRequestNotificationPermission = { requestNotificationPermissionIfNeeded() },
-                            onComplete                      = {}
-                        )
                     }
                 }
             }
         }
     }
 
+    override fun onStop() {
+        super.onStop()
+        isUnlocked.value = false
+    }
+
     // ── NFC foreground dispatch ───────────────────────────────────────────────
 
     override fun onResume() {

app/src/main/java/com/bitcointxoko/gudariwallet/api/Adapters.kt

@@ -1,9 +1,16 @@
 package com.bitcointxoko.gudariwallet.api
 
-import com.google.gson.TypeAdapter
-import com.google.gson.stream.JsonReader
-import com.google.gson.stream.JsonToken
-import com.google.gson.stream.JsonWriter
+import kotlinx.serialization.ExperimentalSerializationApi
+import kotlinx.serialization.KSerializer
+import kotlinx.serialization.descriptors.SerialDescriptor
+import kotlinx.serialization.descriptors.buildClassSerialDescriptor
+import kotlinx.serialization.encoding.Decoder
+import kotlinx.serialization.encoding.Encoder
+import kotlinx.serialization.json.JsonArray
+import kotlinx.serialization.json.JsonDecoder
+import kotlinx.serialization.json.JsonNull
+import kotlinx.serialization.json.JsonPrimitive
+import kotlinx.serialization.json.jsonPrimitive
 
 /**
  * LNbits returns `comment` in PaymentExtra as either:
@@ -11,31 +18,29 @@ import com.google.gson.stream.JsonWriter
  *   - a JSON array    ["Thanks!"]
  *   - null
  *
- * Registered centrally in [GsonProvider] — but also applied via @JsonAdapter
- * on the field for extra safety.
+ * Mirrors the behavior of the old Gson FlexibleStringAdapter.
  */
-class FlexibleStringAdapter : TypeAdapter<String?>() {
+object FlexibleStringSerializer : KSerializer<String?> {
 
-    override fun write(out: JsonWriter, value: String?) {
-        if (value == null) out.nullValue() else out.value(value)
+    override val descriptor: SerialDescriptor =
+        buildClassSerialDescriptor("FlexibleString")
+
+    @OptIn(ExperimentalSerializationApi::class)
+    override fun serialize(encoder: Encoder, value: String?) {
+        if (value == null) encoder.encodeNull()
+        else encoder.encodeString(value)
     }
 
-    override fun read(reader: JsonReader): String? {
-        return when (reader.peek()) {
-            JsonToken.NULL -> { reader.nextNull(); null }
-            JsonToken.BEGIN_ARRAY -> {
-                val parts = mutableListOf<String>()
-                reader.beginArray()
-                while (reader.hasNext()) {
-                    when (reader.peek()) {
-                        JsonToken.NULL -> reader.nextNull()
-                        else           -> parts.add(reader.nextString())
-                    }
-                }
-                reader.endArray()
-                parts.joinToString(", ").ifEmpty { null }
-            }
-            else -> reader.nextString()
+    override fun deserialize(decoder: Decoder): String? {
+        val jsonDecoder = decoder as JsonDecoder
+        return when (val element = jsonDecoder.decodeJsonElement()) {
+            is JsonNull -> null
+            is JsonPrimitive -> element.content                  // plain string → as-is
+            is JsonArray -> element                          // array → join elements
+                .mapNotNull { if (it is JsonNull) null else it.jsonPrimitive.content }
+                .joinToString(", ")
+                .ifEmpty { null }
+            else             -> null
         }
     }
 }

app/src/main/java/com/bitcointxoko/gudariwallet/api/GsonProvider.kt

@@ -1,21 +0,0 @@
-package com.bitcointxoko.gudariwallet.api
-
-import com.google.gson.Gson
-import com.google.gson.GsonBuilder
-
-/**
- * Single source of truth for the app's Gson instance.
- *
- * All serialization/deserialization — Retrofit, SharedPreferences caches,
- * and WebSocket message parsing — must use this instance so that registered
- * type adapters (e.g. [SuccessActionAdapter]) are applied consistently
- * everywhere.
- *
- * To add a new adapter: register it here once. It will automatically apply
- * to every deserialization path in the app.
- */
-object GsonProvider {
-    val gson: Gson = GsonBuilder()
-        .registerTypeAdapter(SuccessAction::class.java, SuccessActionAdapter())
-        .create()
-}

app/src/main/java/com/bitcointxoko/gudariwallet/api/JsonProvider.kt

@@ -0,0 +1,24 @@
+package com.bitcointxoko.gudariwallet.api
+
+import kotlinx.serialization.json.Json
+
+/**
+ * Single source of truth for the app's JSON instance.
+ *
+ * All serialization/deserialization — Retrofit, DataStore caches,
+ * and WebSocket message parsing — must use this instance so that
+ * configuration is applied consistently everywhere.
+ *
+ * Custom type serializers (e.g. [SuccessActionSerializer],
+ * [FlexibleStringSerializer]) are registered directly on the model
+ * classes via @Serializable(with = ...) so no explicit registration
+ * is needed here.
+ */
+object JsonProvider {
+    val json: Json = Json {
+        ignoreUnknownKeys = true   // tolerate extra fields from the API
+        isLenient = true           // accept unquoted/malformed JSON from some endpoints
+        explicitNulls = false      // omit null fields when serializing requests
+        encodeDefaults = true
+    }
+}

app/src/main/java/com/bitcointxoko/gudariwallet/api/LNbitsApi.kt

@@ -1,9 +1,11 @@
 package com.bitcointxoko.gudariwallet.api
 
 import retrofit2.http.Body
+import retrofit2.http.DELETE
 import retrofit2.http.GET
 import retrofit2.http.Header
 import retrofit2.http.POST
+import retrofit2.http.PUT
 import retrofit2.http.Path
 import retrofit2.http.Query
 import retrofit2.http.Url
@@ -13,7 +15,7 @@ interface LNbitsApi {
     /** GET /api/v1/wallet — returns balance and wallet info */
     @GET("api/v1/wallet")
     suspend fun getWallet(
-        @Header("X-Api-Key") apiKey: String
+        @Header("X-Api-Key") invoiceKey: String
     ): WalletResponse
 
     /** POST /api/v1/payments — creates a BOLT-11 invoice */
@@ -42,10 +44,10 @@ interface LNbitsApi {
     ): PayInvoiceResponse
 
     /** GET /api/v1/payments — returns payment history */
-    @GET("api/v1/payments")
-    suspend fun getPayments(
-        @Header("X-Api-Key") apiKey: String
-    ): List<WsPayment>
+//    @GET("api/v1/payments")
+//    suspend fun getPayments(
+//        @Header("X-Api-Key") apiKey: String
+//    ): List<WsPayment>
 
     /** GET /api/v1/payments/paginated — returns bulk payment history */
     @GET("api/v1/payments/paginated")
@@ -144,4 +146,61 @@ interface LNbitsApi {
      */
     @GET("api/v1/currencies")
     suspend fun getSupportedCurrencies(): List<String>
+
+    // ── NWC Provider ──────────────────────────────────────────────────────────
+
+    @GET("nwcprovider/api/v1/permissions")
+    suspend fun getNwcPermissions(
+        @Header("X-Api-Key") invoiceKey: String
+    ): Map<String, Any>
+
+    @GET("nwcprovider/api/v1/nwc")
+    suspend fun getNwcKeys(
+        @Header("X-Api-Key") adminKey: String,
+        @Query("include_expired") includeExpired: Boolean = false
+    ): List<NwcGetResponse>
+
+    @GET("nwcprovider/api/v1/nwc/{pubkey}")
+    suspend fun getNwcKey(
+        @Header("X-Api-Key") adminKey: String,
+        @Path("pubkey") pubkey: String,
+        @Query("include_expired") includeExpired: Boolean = false,
+        @Query("refresh_last_used") refreshLastUsed: Boolean = false
+    ): NwcGetResponse
+
+    @PUT("nwcprovider/api/v1/nwc/{pubkey}")
+    suspend fun registerNwcKey(
+        @Header("X-Api-Key") adminKey: String,
+        @Path("pubkey") pubkey: String,
+        @Body request: NwcRegistrationRequest
+    ): NwcGetResponse
+
+    @DELETE("nwcprovider/api/v1/nwc/{pubkey}")
+    suspend fun deleteNwcKey(
+        @Header("X-Api-Key") adminKey: String,
+        @Path("pubkey") pubkey: String
+    )
+
+    @GET("nwcprovider/api/v1/pairing/{secret}")
+    suspend fun getNwcPairingUrl(
+        @Header("X-Api-Key") invoiceKey: String,
+        @Path("secret") secret: String
+    ): String
+
+    @GET("nwcprovider/api/v1/config")
+    suspend fun getNwcConfig(
+        @Header("X-Api-Key") adminKey: String
+    ): Map<String, Any>
+
+    @GET("nwcprovider/api/v1/config/{key}")
+    suspend fun getNwcConfigValue(
+        @Header("X-Api-Key") adminKey: String,
+        @Path("key") key: String
+    ): Map<String, Any>
+
+    @POST("nwcprovider/api/v1/config")
+    suspend fun setNwcConfig(
+        @Header("X-Api-Key") adminKey: String,
+        @Body config: Map<String, Any>
+    ): Map<String, Any>
 }

app/src/main/java/com/bitcointxoko/gudariwallet/api/LNbitsClient.kt

@@ -1,87 +1,88 @@
 package com.bitcointxoko.gudariwallet.api
 
-import com.bitcointxoko.gudariwallet.BuildConfig
 import com.bitcointxoko.gudariwallet.security.SecretStore
-import com.bitcointxoko.gudariwallet.util.WalletConstants
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
 import kotlinx.coroutines.flow.first
-import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.launch
 import okhttp3.HttpUrl.Companion.toHttpUrl
 import okhttp3.Interceptor
+import okhttp3.MediaType.Companion.toMediaType
 import okhttp3.OkHttpClient
-import okhttp3.logging.HttpLoggingInterceptor
 import retrofit2.Retrofit
-import retrofit2.converter.gson.GsonConverterFactory
-import java.util.concurrent.TimeUnit
+import retrofit2.converter.kotlinx.serialization.asConverterFactory
+import java.util.concurrent.atomic.AtomicReference
 
-object LNbitsClient {
+class LNbitsClient(secrets: SecretStore) {
 
-    // Single shared client — used by both Retrofit and WebSocket
-    val httpClient: OkHttpClient = OkHttpClient.Builder()
-        .connectTimeout(WalletConstants.CONNECT_TIMEOUT_S, TimeUnit.SECONDS)
-        .readTimeout(WalletConstants.READ_TIMEOUT_S, TimeUnit.SECONDS)
-        .writeTimeout(WalletConstants.WRITE_TIMEOUT_S, TimeUnit.SECONDS)
-        .apply {
-            if (BuildConfig.DEBUG) {
-                addInterceptor(HttpLoggingInterceptor().apply {
-                    level = HttpLoggingInterceptor.Level.BODY
-                })
+    // Scope lives as long as this client — SupervisorJob so one failure
+    // doesn't cancel the URL-watching coroutine.
+    private val scope = CoroutineScope(SupervisorJob() + Dispatchers.IO)
+
+    // Cached in memory. Starts blank; populated as soon as DataStore emits.
+    private val cachedBaseUrl = AtomicReference("")
+
+    init {
+        scope.launch {
+            // Suspend until DataStore has emitted at least once.
+            // This primes cachedBaseUrl before any request can realistically fire.
+            val initial = secrets.credentials.first()
+            cachedBaseUrl.set(initial.baseUrl)
+            // Then keep it updated reactively for the lifetime of this client.
+            secrets.credentials.collect { credentials ->
+                cachedBaseUrl.set(credentials.baseUrl)
             }
         }
-        .build()
+    }
 
-    fun create(secrets: SecretStore): LNbitsApi {
-        // Auth header interceptor — reads invoice key per-request (unchanged)
-        val authInterceptor = Interceptor { chain ->
-            val key = runBlocking { secrets.invoiceKey() }
-            chain.proceed(
-                chain.request().newBuilder()
-                    .header("X-Api-Key", key)
-                    .build()
-            )
-        }
+    val api: LNbitsApi by lazy { buildApi() }
 
-        // Dynamic base URL interceptor — rewrites the placeholder host to the
-        // real base URL at request time, not at Retrofit construction time.
-        // This means credentials only need to be in DataStore by the time the
-        // first HTTP request fires, not at app startup.
+    private fun buildApi(): LNbitsApi {
         val dynamicBaseUrlInterceptor = Interceptor { chain ->
-            val realBaseUrl = runBlocking { secrets.baseUrl() }
-                .ifBlank { "https://placeholder.invalid" }
-                .trimEnd('/')
-            val realHttpUrl = realBaseUrl.toHttpUrl()
+            val originalRequest = chain.request()
+            val originalUrl = originalRequest.url
+
+            if (originalUrl.host != "placeholder.invalid") {
+                return@Interceptor chain.proceed(originalRequest)
+            }
+
+            val raw = cachedBaseUrl.get().ifBlank { null }
+                ?: throw IllegalStateException(
+                    "LNbits base URL is not configured. " +
+                            "Complete onboarding before making API calls."
+                )
+
+            val realHttpUrl = raw.trimEnd('/').toHttpUrl()
 
-            val originalUrl = chain.request().url
             val newUrl = originalUrl.newBuilder()
                 .scheme(realHttpUrl.scheme)
                 .host(realHttpUrl.host)
                 .port(realHttpUrl.port)
+                // Preserve sub-path prefix (e.g. /lnbits in reverse-proxy setups)
+                .encodedPath(
+                    realHttpUrl.encodedPath.trimEnd('/') + originalUrl.encodedPath
+                )
                 .build()
 
-            chain.proceed(
-                chain.request().newBuilder()
-                    .url(newUrl)
-                    .build()
-            )
+            chain.proceed(originalRequest.newBuilder().url(newUrl).build())
         }
 
-        val client = httpClient.newBuilder()
-            .addInterceptor(authInterceptor)
+        val client = LNbitsHttpClient.instance.newBuilder()
             .addInterceptor(dynamicBaseUrlInterceptor)
-            .apply {
-                // Logging goes LAST — after URL rewrite — so logs show the real URL
-                if (BuildConfig.DEBUG) {
-                    addInterceptor(HttpLoggingInterceptor().apply {
-                        level = HttpLoggingInterceptor.Level.BODY
-                    })
-                }
-            }
             .build()
 
         return Retrofit.Builder()
-            .baseUrl("https://placeholder.invalid/")  // structurally required by Retrofit;
-            // always overwritten by the interceptor
+            .baseUrl("https://placeholder.invalid/")
+            // ↑ Structurally required: Retrofit validates that baseUrl is a
+            // well-formed absolute URL at construction time. The interceptor
+            // rewrites it before any real request leaves the device.
             .client(client)
-            .addConverterFactory(GsonConverterFactory.create(GsonProvider.gson))
+            .addConverterFactory(
+                JsonProvider.json.asConverterFactory(
+                    "application/json; charset=UTF-8".toMediaType()
+                )
+            )
             .build()
             .create(LNbitsApi::class.java)
     }

app/src/main/java/com/bitcointxoko/gudariwallet/api/LNbitsHttpClient.kt

@@ -0,0 +1,18 @@
+package com.bitcointxoko.gudariwallet.api
+
+import com.bitcointxoko.gudariwallet.util.WalletConstants
+import okhttp3.OkHttpClient
+import java.util.concurrent.TimeUnit
+
+// internal = visible within this Gradle module only.
+// Intentionally not private: WalletNotificationService accesses this
+// directly because Android instantiates Services via reflection —
+// constructor injection is not possible. All other consumers must use
+// LNbitsClient.api instead.
+object LNbitsHttpClient {
+    internal val instance: OkHttpClient = OkHttpClient.Builder()
+        .connectTimeout(WalletConstants.CONNECT_TIMEOUT_S, TimeUnit.SECONDS)
+        .readTimeout(WalletConstants.READ_TIMEOUT_S, TimeUnit.SECONDS)
+        .writeTimeout(WalletConstants.WRITE_TIMEOUT_S, TimeUnit.SECONDS)
+        .build()
+}

app/src/main/java/com/bitcointxoko/gudariwallet/api/Models.kt

@@ -1,133 +1,147 @@
 package com.bitcointxoko.gudariwallet.api
 
 import androidx.compose.runtime.Immutable
-import com.google.gson.TypeAdapter
-import com.google.gson.annotations.JsonAdapter
-import com.google.gson.annotations.SerializedName
-import com.google.gson.stream.JsonReader
-import com.google.gson.stream.JsonToken
-import com.google.gson.stream.JsonWriter
+import kotlinx.serialization.KSerializer
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.descriptors.SerialDescriptor
+import kotlinx.serialization.descriptors.buildClassSerialDescriptor
+import kotlinx.serialization.encoding.Decoder
+import kotlinx.serialization.encoding.Encoder
+import kotlinx.serialization.json.JsonDecoder
+import kotlinx.serialization.json.JsonElement
+import kotlinx.serialization.json.JsonEncoder
+import kotlinx.serialization.json.JsonNull
+import kotlinx.serialization.json.JsonObject
+import kotlinx.serialization.json.JsonPrimitive
+import kotlinx.serialization.json.jsonObject
+import kotlinx.serialization.json.jsonPrimitive
 
 // ── Wallet ────────────────────────────────────────────────────────────────────
+@Serializable
 data class WalletResponse(
-    val id: String,
-    val name: String,
-    val balance: Long       // millisatoshis
+    val id: String = "",
+    val name: String = "",
+    val balance: Long = 0L      // millisatoshis
 )
 
 // ── Create invoice ────────────────────────────────────────────────────────────
+@Serializable
 data class CreateInvoiceRequest(
     val out: Boolean,
     val amount: Long,       // satoshis
     val memo: String
 )
 
+@Serializable
 data class CreateInvoiceResponse(
-    @SerializedName("payment_hash")    val paymentHash: String,
-    @SerializedName("payment_request") val paymentRequest: String,
-    @SerializedName("expiry")          val expiry        : String?
+    @SerialName("payment_hash")    val paymentHash: String  = "",
+    @SerialName("payment_request") val paymentRequest: String = "",
+    @SerialName("expiry")          val expiry: String?      = null
 )
 
 // ── Pay invoice ───────────────────────────────────────────────────────────────
+@Serializable
 data class PayInvoiceRequest(
     val out: Boolean,
     val bolt11: String
 )
 
+@Serializable
 data class PayInvoiceResponse(
-    @SerializedName("payment_hash") val paymentHash: String,
-    @SerializedName("checking_id")  val checkingId: String
+    @SerialName("payment_hash") val paymentHash: String = "",
+    @SerialName("checking_id")  val checkingId: String  = ""
 )
 
 // ── Check payment ─────────────────────────────────────────────────────────────
+@Serializable
 data class PaymentStatusResponse(
-    val paid: Boolean,
+    val paid: Boolean = false,
     val details: PaymentDetails? = null
 )
 
+@Serializable
 data class PaymentDetails(
-    val amount: Long?,
-    val fee: Long?,
-    val memo: String?
+    val amount: Long?  = null,
+    val fee: Long?     = null,
+    val memo: String?  = null
 )
 
 // ── Decode BOLT-11 ────────────────────────────────────────────────────────────
+@Serializable
 data class DecodeInvoiceRequest(
     val data: String
 )
 
+@Serializable
 data class DecodeInvoiceResponse(
-    @SerializedName("payment_hash") val paymentHash  : String? = null,
-    @SerializedName("amount_msat")  val amountMsat   : Long?   = null,
-    @SerializedName("description")  val description  : String? = null,
-    @SerializedName("payee")        val payee        : String? = null,
-    @SerializedName("route_hints")  val routeHints   : List<List<RouteHintHop>>? = null
+    @SerialName("payment_hash") val paymentHash: String?            = null,
+    @SerialName("amount_msat")  val amountMsat: Long?               = null,
+    @SerialName("description")  val description: String?            = null,
+    @SerialName("payee")        val payee: String?                  = null,
+    @SerialName("route_hints")  val routeHints: List<List<RouteHintHop>>? = null
 )
 
-
+@Serializable
 data class RouteHintHop(
-    @SerializedName("public_key")         val publicKey       : String,
-    @SerializedName("short_channel_id")   val shortChannelId  : String? = null,
-    @SerializedName("base_fee")           val baseFeeMsat     : Long    = 0,
-    @SerializedName("ppm_fee")            val ppmFee          : Long    = 0,
-    @SerializedName("cltv_expiry_delta")  val cltvExpiryDelta : Int     = 0
+    @SerialName("public_key")        val publicKey: String        = "",
+    @SerialName("short_channel_id")  val shortChannelId: String?  = null,
+    @SerialName("base_fee")          val baseFeeMsat: Long        = 0,
+    @SerialName("ppm_fee")           val ppmFee: Long             = 0,
+    @SerialName("cltv_expiry_delta") val cltvExpiryDelta: Int     = 0
 )
 
 // ── LNURL scan ────────────────────────────────────────────────────────────────
+@Serializable
 data class LnurlScanResponse(
-    val tag: String?,
-    // ── payRequest fields ────────────────────────────────────────────────────
-    val callback: String?                = null,
-    @SerializedName("minSendable")    val minSendable: Long?    = null,
-    @SerializedName("maxSendable")    val maxSendable: Long?    = null,
-    val metadata: String?                = null,
-    @SerializedName("commentAllowed") val commentAllowed: Int?  = null,
-    @SerializedName("allowsNostr")    val allowsNostr: Boolean? = null,
-    @SerializedName("nostrPubkey")    val nostrPubkey: String?  = null,
-    val bolt11: String?                  = null,
-    @SerializedName("amount_msat")    val amountMsat: Long?     = null,
-    val disposable: Boolean?             = null,  // LUD-06: null means treat as true (do not cache)
-    // ── withdrawRequest fields ───────────────────────────────────────────────
-    val k1               : String?  = null,
-    @SerializedName("defaultDescription")
-    val defaultDescription: String? = null,
-    @SerializedName("minWithdrawable")
-    val minWithdrawable  : Long?    = null,
-    @SerializedName("maxWithdrawable")
-    val maxWithdrawable  : Long?    = null,
-    @SerializedName("balanceCheck")
-    val balanceCheck     : String?  = null,
-    @SerializedName("currentBalance")
-    val currentBalance   : Long?    = null,
-    // ── Error fields ─────────────────────────────────────────────────────────
-    val status         : String?  = null,   // "OK" or "ERROR"
-    val reason         : String?  = null    // error message when status == "ERROR"
+    val tag: String? = null,
+    // ── payRequest fields ─────────────────────────────────────────────────────
+    val callback: String?                       = null,
+    @SerialName("minSendable")    val minSendable: Long?           = null,
+    @SerialName("maxSendable")    val maxSendable: Long?           = null,
+    val metadata: String?                       = null,
+    @SerialName("commentAllowed") val commentAllowed: Int?         = null,
+    @SerialName("allowsNostr")    val allowsNostr: Boolean?        = null,
+    @SerialName("nostrPubkey")    val nostrPubkey: String?         = null,
+    val bolt11: String?                         = null,
+    @SerialName("amount_msat")    val amountMsat: Long?            = null,
+    val disposable: Boolean?                    = null,  // LUD-06: null means treat as true (do not cache)
+    // ── withdrawRequest fields ────────────────────────────────────────────────
+    val k1: String?                             = null,
+    @SerialName("defaultDescription") val defaultDescription: String? = null,
+    @SerialName("minWithdrawable")    val minWithdrawable: Long?   = null,
+    @SerialName("maxWithdrawable")    val maxWithdrawable: Long?   = null,
+    @SerialName("balanceCheck")       val balanceCheck: String?    = null,
+    @SerialName("currentBalance")     val currentBalance: Long?    = null,
+    // ── Error fields ──────────────────────────────────────────────────────────
+    val status: String?                         = null,  // "OK" or "ERROR"
+    val reason: String?                         = null   // error message when status == "ERROR"
 )
 
 // ── LNURL-pay callback response (LUD-06) ─────────────────────────────────────
+@Serializable
 data class LnurlCallbackResponse(
-    val pr            : String,           // BOLT-11 invoice to pay
-    val routes        : List<Any>?  = null,
-    @SerializedName("successAction")
-    val successAction : SuccessAction? = null,
-    // Error fields (server may return status=ERROR instead of pr)
-    val status        : String?     = null,
-    val reason        : String?     = null
+    val pr: String = "",
+    val routes: List<JsonElement>? = null,
+    @SerialName("successAction") val successAction: SuccessAction? = null,
+    val status: String? = null,
+    val reason: String? = null
 )
 
-
 // ── LNURL pay ─────────────────────────────────────────────────────────────────
+@Serializable
 data class LnurlPayRes(
-    val tag: String?,
-    val callback: String?,
-    @SerializedName("minSendable")    val minSendable: Long?,
-    @SerializedName("maxSendable")    val maxSendable: Long?,
-    val metadata: String?,
-    @SerializedName("commentAllowed") val commentAllowed: Int?,
-    @SerializedName("allowsNostr")    val allowsNostr: Boolean? = null,
-    @SerializedName("nostrPubkey")    val nostrPubkey: String?  = null
+    val tag: String?                              = null,
+    val callback: String?                         = null,
+    @SerialName("minSendable")    val minSendable: Long?    = null,
+    @SerialName("maxSendable")    val maxSendable: Long?    = null,
+    val metadata: String?                         = null,
+    @SerialName("commentAllowed") val commentAllowed: Int?  = null,
+    @SerialName("allowsNostr")    val allowsNostr: Boolean? = null,
+    @SerialName("nostrPubkey")    val nostrPubkey: String?  = null
 )
 
+@Serializable
 data class PayLnurlRequest(
     val res: LnurlPayRes,
     val lnurl: String,
@@ -135,45 +149,48 @@ data class PayLnurlRequest(
     val comment: String? = null
 )
 
+@Serializable
 data class PayLnurlResponse(
-    @SerializedName("payment_hash") val paymentHash: String,
-    @SerializedName("checking_id")  val checkingId: String
+    @SerialName("payment_hash") val paymentHash: String = "",
+    @SerialName("checking_id")  val checkingId: String  = ""
 )
 
+@Serializable
 data class WithdrawCallbackResponse(
-    val status : String,
-    val reason : String? = null
+    val status: String  = "",
+    val reason: String? = null
 )
 
 // ── LNURLp pay link (lightning address) ──────────────────────────────────────
+@Serializable
 data class LnurlpLink(
-    val id          : String,
-    val wallet      : String,
-    val username    : String?,      // the part before the @ in the lightning address
-    val description : String?,
-    val min         : Long,
-    val max         : Long
+    val id: String       = "",
+    val wallet: String   = "",
+    val username: String?    = null,
+    val description: String? = null,
+    @Serializable(with = LongAsDoubleSerializer::class) val min: Long = 0L,
+    @Serializable(with = LongAsDoubleSerializer::class) val max: Long = 0L
 )
 
-
 // ── Payment history ───────────────────────────────────────────────────────────
 @Immutable
+@Serializable
 data class PaymentRecord(
-    @SerializedName("payment_hash") val paymentHash: String,
-    @SerializedName("checking_id")  val checkingId: String,
-    @SerializedName("amount")       val amountMsat: Long,
-    @SerializedName("fee")          val feeMsat: Long,
-    @SerializedName("memo")         val memo: String?,
-    @SerializedName("time")         val time: String,
-    @SerializedName("status")       val status: String,
-    @SerializedName("bolt11")       val bolt11: String?,
-    @SerializedName("pending")      val pending: Boolean,
-    @SerializedName("preimage")     val preimage: String?,
-    @SerializedName("extra")        val extra: PaymentExtra?,
+    @SerialName("payment_hash") val paymentHash: String = "",
+    @SerialName("checking_id")  val checkingId: String  = "",
+    @SerialName("amount")       val amountMsat: Long     = 0L,
+    @SerialName("fee")          val feeMsat: Long        = 0L,
+    @SerialName("memo")         val memo: String?        = null,
+    @SerialName("time")         val time: String         = "",
+    @SerialName("status")       val status: String       = "",
+    @SerialName("bolt11")       val bolt11: String?      = null,
+    @SerialName("pending")      val pending: Boolean     = false,
+    @SerialName("preimage")     val preimage: String?    = null,
+    @SerialName("extra")        val extra: PaymentExtra? = null,
     // Not from the API — populated only when loaded from Room via toDomain()
     val createdAt: Long? = null,
-    val pubkey: String? = null,
-    val alias:  String? = null
+    val pubkey: String?  = null,
+    val alias: String?   = null
 ) {
     val amountSat: Long     get() = kotlin.math.abs(amountMsat) / 1000L
     val feeSat: Long        get() = kotlin.math.abs(feeMsat)    / 1000L
@@ -181,13 +198,13 @@ data class PaymentRecord(
 
     companion object {
         fun fromPayment(
-            paymentHash : String,
-            amountSats  : Long,
-            feeSats     : Long?,
-            bolt11      : String?,
-            memo        : String?,
-            pubkey      : String?,
-            alias       : String?,
+            paymentHash: String,
+            amountSats: Long,
+            feeSats: Long?,
+            bolt11: String?,
+            memo: String?,
+            pubkey: String?,
+            alias: String?,
         ): PaymentRecord = PaymentRecord(
             paymentHash = paymentHash,
             checkingId  = paymentHash,
@@ -207,23 +224,25 @@ data class PaymentRecord(
 }
 
 @Immutable
-
+@Serializable
 data class PaymentExtra(
-    @SerializedName("tag")            val tag: String?,
-    @JsonAdapter(FlexibleStringAdapter::class)
-    val comment: String?,
-    @SerializedName("success_action") val successAction: SuccessAction?,
-    @SerializedName("wallet_id")      val walletId: String?,
-    @SerializedName("destination")    val destination: String?,
-    @SerializedName("expires_at")     val expiresAt: String?
+    @SerialName("tag")            val tag: String?            = null,
+    @Serializable(with = FlexibleStringSerializer::class)
+    val comment: String?        = null,
+    @SerialName("success_action") @Serializable(with = SuccessActionSerializer::class)
+    val successAction: SuccessAction? = null,
+    @SerialName("wallet_id")      val walletId: String?       = null,
+    @SerialName("destination")    val destination: String?    = null,
+    @SerialName("expires_at")     val expiresAt: String?      = null
 )
 
 @Immutable
+@Serializable(with = SuccessActionSerializer::class)
 data class SuccessAction(
-    @SerializedName("tag")         val tag: String?,
-    @SerializedName("message")     val message: String?,
-    @SerializedName("url")         val url: String?,
-    @SerializedName("description") val description: String?
+    @SerialName("tag")         val tag: String?,
+    @SerialName("message")     val message: String?,
+    @SerialName("url")         val url: String?,
+    @SerialName("description") val description: String?
 )
 
 /**
@@ -232,93 +251,158 @@ data class SuccessAction(
  *   - a plain string "Thanks!"
  *   - null
  *
- * Gson's default deserialiser throws IllegalStateException when it sees a
- * string where it expects {. This adapter handles all three cases.
+ * kotlinx.serialization's default deserializer throws when it sees a
+ * string where it expects {. This serializer handles all three cases.
  *
- * Registered centrally in [GsonProvider] — applies to all deserialization
- * paths automatically.
+ * Applied via @Serializable(with = SuccessActionSerializer::class) on
+ * the SuccessAction class and on PaymentExtra.successAction.
  */
-class SuccessActionAdapter : TypeAdapter<SuccessAction?>() {
+object SuccessActionSerializer : KSerializer<SuccessAction?> {
 
-    override fun write(out: JsonWriter, value: SuccessAction?) {
-        if (value == null) { out.nullValue(); return }
-        out.beginObject()
-        out.name("tag");         out.value(value.tag)
-        out.name("message");     out.value(value.message)
-        out.name("url");         out.value(value.url)
-        out.name("description"); out.value(value.description)
-        out.endObject()
+    override val descriptor: SerialDescriptor =
+        buildClassSerialDescriptor("SuccessAction")
+
+    override fun serialize(encoder: Encoder, value: SuccessAction?) {
+        val jsonEncoder = encoder as JsonEncoder
+        if (value == null) {
+            jsonEncoder.encodeJsonElement(JsonNull)
+        } else {
+            jsonEncoder.encodeJsonElement(
+                JsonObject(
+                    mapOf(
+                        "tag"         to JsonPrimitive(value.tag),
+                        "message"     to JsonPrimitive(value.message),
+                        "url"         to JsonPrimitive(value.url),
+                        "description" to JsonPrimitive(value.description)
+                    )
+                )
+            )
+        }
     }
 
-    override fun read(reader: JsonReader): SuccessAction? {
-        return when (reader.peek()) {
-            JsonToken.NULL -> { reader.nextNull(); null }
-
-            // Plain string — treat as a message-type success action
-            JsonToken.STRING -> {
-                val text = reader.nextString()
+    override fun deserialize(decoder: Decoder): SuccessAction? {
+        val jsonDecoder = decoder as JsonDecoder
+        return when (val element = jsonDecoder.decodeJsonElement()) {
+            is JsonNull      -> null
+            is JsonPrimitive -> {
+                // Plain string — treat as a message-type success action
+                val text = element.jsonPrimitive.content
                 if (text.isBlank()) null
                 else SuccessAction(tag = "message", message = text, url = null, description = null)
             }
-
-            // Normal object
-            JsonToken.BEGIN_OBJECT -> {
-                reader.beginObject()
-                var tag: String? = null
-                var message: String? = null
-                var url: String? = null
-                var description: String? = null
-                while (reader.hasNext()) {
-                    when (reader.nextName()) {
-                        "tag"         -> tag         = reader.nextString()
-                        "message"     -> message     = reader.nextString()
-                        "url"         -> url         = reader.nextString()
-                        "description" -> description = reader.nextString()
-                        else          -> reader.skipValue()
-                    }
-                }
-                reader.endObject()
-                SuccessAction(tag = tag, message = message, url = url, description = description)
+            is JsonObject    -> {
+                SuccessAction(
+                    tag         = element.jsonObject["tag"]?.jsonPrimitive?.content,
+                    message     = element.jsonObject["message"]?.jsonPrimitive?.content,
+                    url         = element.jsonObject["url"]?.jsonPrimitive?.content,
+                    description = element.jsonObject["description"]?.jsonPrimitive?.content
+                )
             }
-
-            else -> { reader.skipValue(); null }
+            else             -> null
         }
     }
 }
+
+@Serializable
 data class PaymentDetailResponse(
     val paid: Boolean,
     val details: PaymentRecord?
 )
 
 // ── WebSocket payment message ─────────────────────────────────────────────────
+@Serializable
 data class WsPaymentMessage(
-    @SerializedName("wallet_balance") val walletBalance: Long?,
-    val payment: WsPayment?
+    @SerialName("wallet_balance") val walletBalance: Long?   = null,
+    val payment: WsPayment?                                  = null
 )
 
+@Serializable
 data class WsPayment(
-    @SerializedName("payment_hash") val paymentHash: String,
-    @SerializedName("checking_id")  val checkingId: String,
-    @SerializedName("amount")       val amount: Long,
-    @SerializedName("fee")          val fee: Long,
-    @SerializedName("memo")         val memo: String?,
-    @SerializedName("time")         val time: String,
-    @SerializedName("status")       val status: String,
-    @SerializedName("bolt11")       val bolt11: String?,
-    @SerializedName("pending")      val pending: Boolean,
-    @SerializedName("preimage")     val preimage: String?,
-    @SerializedName("extra")        val extra: PaymentExtra?
+    @SerialName("payment_hash") val paymentHash: String  = "",
+    @SerialName("checking_id")  val checkingId: String   = "",
+    @SerialName("amount")       val amount: Long         = 0L,
+    @SerialName("fee")          val fee: Long            = 0L,
+    @SerialName("memo")         val memo: String?        = null,
+    @SerialName("time")         val time: String         = "",
+    @SerialName("status")       val status: String       = "",
+    @SerialName("bolt11")       val bolt11: String?      = null,
+    @SerialName("pending")      val pending: Boolean     = false,
+    @SerialName("preimage")     val preimage: String?    = null,
+    @SerialName("extra")        val extra: PaymentExtra? = null
 )
 
-
-// ── Fiat rate ────────────────────────────────────────────────────────────────
+// ── Fiat rate ─────────────────────────────────────────────────────────────────
+@Serializable
 data class FiatRateResponse(
-    val rate: Double,   // sat to fiat rate
-    val price : Double  // BTC price in the requested fiat currency
+    val rate: Double   = 0.0,  // sat to fiat rate
+    val price: Double  = 0.0   // BTC price in the requested fiat currency
 )
 
-// ── History sync ─────────────────────────────────────────────────────────────
+// ── History sync ──────────────────────────────────────────────────────────────
+@Serializable
 data class PaginatedPaymentsResponse(
-    @SerializedName("data")  val data:  List<PaymentRecord>,
-    @SerializedName("total") val total: Int
+    @SerialName("data")  val data: List<PaymentRecord> = emptyList(),
+    @SerialName("total") val total: Int                = 0
 )
+
+// ── NWC Provider models ───────────────────────────────────────────────────────
+@Serializable
+data class NwcKey(
+    val pubkey: String      = "",
+    val wallet: String      = "",
+    val description: String = "",
+    val expires_at: Long    = 0L,
+    val permissions: String = "",
+    val created_at: Long    = 0L,
+    val last_used: Long     = 0L
+)
+
+@Serializable
+data class NwcBudget(
+    val id: Int              = 0,
+    val pubkey: String       = "",
+    val budget_msats: Long   = 0L,
+    val refresh_window: Int  = 0,
+    val created_at: Long     = 0L,
+    val used_budget_msats: Long = 0L
+)
+
+@Serializable
+data class NwcGetResponse(
+    val data: NwcKey            = NwcKey(),
+    val budgets: List<NwcBudget> = emptyList()
+)
+
+// Request models — no defaults needed (you control the fields, never deserializing)
+@Serializable
+data class NwcNewBudget(
+    val budget_msats: Long,
+    val refresh_window: Int,
+    val created_at: Long = System.currentTimeMillis() / 1000L
+)
+
+@Serializable
+data class NwcRegistrationRequest(
+    val permissions: List<String>,
+    val description: String,
+    val expires_at: Long,
+    val budgets: List<NwcNewBudget> = emptyList()
+)
+
+/**
+ * Deserializes a JSON number that may arrive as either an integer (1)
+ * or a float (1.0) into a Long, truncating any fractional part.
+ */
+object LongAsDoubleSerializer : KSerializer<Long> {
+    override val descriptor = buildClassSerialDescriptor("LongAsDouble")
+
+    override fun serialize(encoder: Encoder, value: Long) = encoder.encodeLong(value)
+
+    override fun deserialize(decoder: Decoder): Long {
+        val jsonDecoder = decoder as JsonDecoder
+        return when (val element = jsonDecoder.decodeJsonElement()) {
+            is JsonPrimitive -> element.content.toDouble().toLong()
+            else -> 0L
+        }
+    }
+}

app/src/main/java/com/bitcointxoko/gudariwallet/api/NodeAliasApi.kt

@@ -1,10 +1,12 @@
 package com.bitcointxoko.gudariwallet.api
 
+import kotlinx.serialization.Serializable
 import retrofit2.http.GET
 import retrofit2.http.Path
 
 // ── mempool.space ─────────────────────────────────────────────────────────────
 
+@Serializable
 data class MempoolNodeResponse(
     val alias: String?,
     val public_key: String?
@@ -17,6 +19,7 @@ interface MempoolApi {
 
 // ── 1ml.com ───────────────────────────────────────────────────────────────────
 
+@Serializable
 data class OneMlNodeResponse(
     val alias: String?,
     val pub_key: String?

app/src/main/java/com/bitcointxoko/gudariwallet/api/NodeAliasClient.kt.kt

@@ -1,8 +1,9 @@
 package com.bitcointxoko.gudariwallet.api
 
+import okhttp3.MediaType.Companion.toMediaType
 import okhttp3.OkHttpClient
 import retrofit2.Retrofit
-import retrofit2.converter.gson.GsonConverterFactory
+import retrofit2.converter.kotlinx.serialization.asConverterFactory
 import java.util.concurrent.TimeUnit
 
 /**
@@ -17,17 +18,20 @@ class NodeAliasClient {
         .readTimeout(5, TimeUnit.SECONDS)
         .build()
 
+    private val converter = JsonProvider.json
+        .asConverterFactory("application/json; charset=UTF-8".toMediaType())
+
     private val mempoolApi: MempoolApi = Retrofit.Builder()
         .baseUrl("https://mempool.space/")
         .client(client)
-        .addConverterFactory(GsonConverterFactory.create())
+        .addConverterFactory(converter)
         .build()
         .create(MempoolApi::class.java)
 
     private val oneMlApi: OneMlApi = Retrofit.Builder()
         .baseUrl("https://1ml.com/")
         .client(client)
-        .addConverterFactory(GsonConverterFactory.create())
+        .addConverterFactory(converter)
         .build()
         .create(OneMlApi::class.java)
 

app/src/main/java/com/bitcointxoko/gudariwallet/data/AppLockStore.kt

@@ -0,0 +1,27 @@
+package com.bitcointxoko.gudariwallet.data
+
+import android.content.Context
+import androidx.datastore.preferences.core.booleanPreferencesKey
+import androidx.datastore.preferences.core.edit
+import androidx.datastore.preferences.preferencesDataStore
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.map
+
+private val Context.appLockDataStore by preferencesDataStore(name = "app_lock_prefs")
+
+class AppLockStore(private val context: Context) {
+
+    companion object {
+        private val KEY_APP_LOCK_ENABLED = booleanPreferencesKey("app_lock_enabled")
+    }
+
+    /** Defaults to true (locked) as required. */
+    val appLockEnabled: Flow<Boolean> = context.appLockDataStore.data
+        .map { prefs -> prefs[KEY_APP_LOCK_ENABLED] ?: true }
+
+    suspend fun setAppLockEnabled(enabled: Boolean) {
+        context.appLockDataStore.edit { prefs ->
+            prefs[KEY_APP_LOCK_ENABLED] = enabled
+        }
+    }
+}

app/src/main/java/com/bitcointxoko/gudariwallet/data/ContactRepository.kt

@@ -0,0 +1,149 @@
+package com.bitcointxoko.gudariwallet.data
+
+import android.app.Application
+import com.bitcointxoko.gudariwallet.data.db.*
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.map
+
+class ContactRepository(app: Application) {
+    private val dao = AppDatabase.getInstance(app).contactDao()
+
+    // --- Observe ---
+
+    fun observeAllContacts(): Flow<List<ContactWithAddresses>> =
+        dao.observeAllWithAddresses()
+
+    fun observeContact(id: String): Flow<ContactWithAddresses?> =
+        dao.observeById(id)
+
+    // --- Create ---
+
+    suspend fun createContact(
+        localAlias: String,
+        lnAddress: String? = null,
+        lnUrl: String? = null,
+        pictureUrl: String? = null
+    ): ContactEntity {
+        val contact = ContactEntity(
+            localAlias = localAlias,
+            displayName = null,
+            name = null,
+            pictureUrl = pictureUrl,
+            nostrPubkey = null,
+            nip05 = null,
+            about = null,
+            lnAddress = lnAddress
+        )
+        dao.insert(contact)
+
+        // Also add to payment_addresses table if lnAddress provided
+        lnAddress?.let {
+            dao.insertAddress(
+                PaymentAddressEntity(
+                    contactId = contact.id,
+                    type = PaymentAddressType.LIGHTNING_ADDRESS.name,
+                    address = it,
+                    isDefault = true
+                )
+            )
+        }
+
+        lnUrl?.let {
+            dao.insertAddress(
+                PaymentAddressEntity(
+                    contactId = contact.id,
+                    type = PaymentAddressType.LNURL.name,
+                    address = it,
+                    isDefault = lnAddress == null  // default only if no lnAddress
+                )
+            )
+        }
+
+        return contact
+    }
+
+    // --- Update ---
+
+    suspend fun updateAlias(id: String, newAlias: String) {
+        val existing = dao.getById(id) ?: return
+        dao.update(existing.copy(localAlias = newAlias, updatedAt = System.currentTimeMillis()))
+    }
+
+    suspend fun updatePicture(id: String, pictureUrl: String?) {
+        val existing = dao.getById(id) ?: return
+        dao.update(existing.copy(pictureUrl = pictureUrl, updatedAt = System.currentTimeMillis()))
+    }
+
+    // --- Payment addresses ---
+
+    suspend fun addAddress(
+        contactId: String,
+        type: PaymentAddressType,
+        address: String,
+        label: String? = null,
+        makeDefault: Boolean = false
+    ) {
+        if (makeDefault) dao.clearDefault(contactId, type.name)
+
+        // If LIGHTNING_ADDRESS and default, also sync the fast-lookup column
+        if (type == PaymentAddressType.LIGHTNING_ADDRESS && makeDefault) {
+            dao.getById(contactId)?.let {
+                dao.update(it.copy(lnAddress = address, updatedAt = System.currentTimeMillis()))
+            }
+        }
+
+        dao.insertAddress(
+            PaymentAddressEntity(
+                contactId = contactId,
+                type = type.name,
+                address = address,
+                label = label,
+                isDefault = makeDefault
+            )
+        )
+    }
+
+    suspend fun removeAddress(addressId: String) {
+        dao.deleteAddressById(addressId)
+    }
+
+    // --- Delete ---
+
+    suspend fun deleteContact(id: String) {
+        dao.deleteById(id) // cascades to payment_addresses
+    }
+
+    // --- Lookup (for send flow) ---
+
+    suspend fun findByLnAddress(lnAddress: String): ContactEntity? =
+        dao.findByLnAddress(lnAddress)
+
+    suspend fun findByLnurl(lnurl: String): ContactEntity? =
+        dao.findByAddress(lnurl)
+
+    // --- Contact-Tx link ---
+
+    fun observeContactsForPayment(checkingId: String): Flow<List<ContactEntity>> =
+        dao.observeContactsForPayment(checkingId)
+
+    suspend fun linkPaymentToContact(checkingId: String, contactId: String, role: String? = null) {
+        dao.linkPaymentToContact(TxContactCrossRef(checkingId, contactId, role))
+    }
+
+    suspend fun unlinkPaymentFromContact(checkingId: String, contactId: String) {
+        dao.unlinkPaymentFromContact(checkingId, contactId)
+    }
+
+    fun observePaymentIdsForContact(contactId: String): Flow<List<String>> =
+        dao.observePaymentIdsForContact(contactId)
+
+    fun observeAllPaymentContactNames(): Flow<Map<String, String>> =
+        dao.observePaymentContactNames()
+            .map { list -> list.associate { it.checkingId to it.contactName } }
+
+    suspend fun findCheckingIdsByContactName(query: String): List<String> =
+        dao.findCheckingIdsByContactName(query)
+
+    suspend fun findCheckingIdsByContactIds(contactIds: List<String>): List<String> =
+        dao.findCheckingIdsByContactIds(contactIds)
+}

app/src/main/java/com/bitcointxoko/gudariwallet/data/FiatDataStore.kt

@@ -10,10 +10,11 @@ import androidx.datastore.preferences.core.floatPreferencesKey
 import androidx.datastore.preferences.core.longPreferencesKey
 import androidx.datastore.preferences.core.stringPreferencesKey
 import androidx.datastore.preferences.preferencesDataStore
-import com.google.gson.Gson
-import com.google.gson.reflect.TypeToken
+import com.bitcointxoko.gudariwallet.api.JsonProvider
 import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.first
+import kotlinx.serialization.builtins.ListSerializer
+import kotlinx.serialization.builtins.serializer
 import java.io.IOException
 
 private const val TAG = "FiatDataStore"
@@ -27,13 +28,13 @@ private val Context.fiatDataStore: DataStore<Preferences> by preferencesDataStor
 class FiatDataStore(context: Context) {
 
     private val dataStore = context.applicationContext.fiatDataStore
-    private val gson = Gson()
+    private val json = JsonProvider.json
 
     // ── Key factories ─────────────────────────────────────────────────────────
 
-    private fun rateKey(currency: String)        = floatPreferencesKey("fiat_rate_$currency")
+    private fun rateKey(currency: String)          = floatPreferencesKey("fiat_rate_$currency")
     private fun rateFetchedAtKey(currency: String) = longPreferencesKey("fiat_rate_fetched_at_$currency")
-    private val currenciesKey                    = stringPreferencesKey("fiat_currencies_json")
+    private val currenciesKey                      = stringPreferencesKey("fiat_currencies_json")
 
     // ── Rate ──────────────────────────────────────────────────────────────────
 
@@ -87,10 +88,9 @@ class FiatDataStore(context: Context) {
                 } else throw e
             }
             .first()
-        val json = prefs[currenciesKey] ?: return null
+        val jsonString = prefs[currenciesKey] ?: return null
         return runCatching {
-            val type = object : TypeToken<List<String>>() {}.type
-            val list: List<String> = gson.fromJson(json, type)
+            val list = json.decodeFromString(ListSerializer(String.serializer()), jsonString)
             Timber.d("FIAT [CURRENCIES] DataStore hit (${list.size} currencies)")
             list
         }.getOrElse { e ->
@@ -106,7 +106,7 @@ class FiatDataStore(context: Context) {
         if (currencies.isEmpty()) return
         runCatching {
             dataStore.edit { prefs ->
-                prefs[currenciesKey] = gson.toJson(currencies)
+                prefs[currenciesKey] = json.encodeToString(ListSerializer(String.serializer()), currencies)
             }
         }.onFailure { e ->
             Timber.w("FIAT [CURRENCIES] persist failed — ${e.message}")

app/src/main/java/com/bitcointxoko/gudariwallet/data/LNbitsWalletRepository.kt

@@ -286,4 +286,131 @@ class LNbitsWalletRepository(
     override suspend fun getPaymentDetail(checkingId: String): PaymentDetailResponse {
         return api.getPaymentDetail(secrets.invoiceKey(), checkingId)
     }
+
+    // ── NWC Provider ───────────────────────────────────────────────────────────
+
+    /**
+     * Returns the map of supported NWC permission names.
+     */
+    override suspend fun getNwcPermissions(): Map<String, Any> {
+        Timber.d("NWC [PERMISSIONS] fetching supported permissions")
+        val result = api.getNwcPermissions(secrets.invoiceKey())
+        Timber.i("NWC [PERMISSIONS] received ${result.size} permission(s)")
+        return result
+    }
+
+    /**
+     * Returns all NWC connection keys for the current wallet.
+     */
+    override suspend fun getNwcKeys(includeExpired: Boolean): List<NwcGetResponse> {
+        Timber.d("NWC [KEYS       ] fetching all keys (includeExpired=$includeExpired)")
+        val result = api.getNwcKeys(secrets.adminKey(), includeExpired)
+        Timber.i("NWC [KEYS       ] received ${result.size} key(s)")
+        return result
+    }
+
+    /**
+     * Returns a single NWC connection key by its public key.
+     */
+    override suspend fun getNwcKey(
+        pubkey          : String,
+        includeExpired  : Boolean,
+        refreshLastUsed : Boolean
+    ): NwcGetResponse {
+        Timber.d("NWC [KEY        ] fetching key pubkey=${pubkey.take(16)}…")
+        val result = api.getNwcKey(
+            adminKey        = secrets.adminKey(),
+            pubkey          = pubkey,
+            includeExpired  = includeExpired,
+            refreshLastUsed = refreshLastUsed
+        )
+        Timber.i("NWC [KEY        ] fetched key pubkey=${pubkey.take(16)}… description='${result.data.description}'")
+        return result
+    }
+
+    /**
+     * Registers / creates a new NWC connection key.
+     * Requires admin key.
+     */
+    override suspend fun registerNwcKey(
+        pubkey  : String,
+        request : NwcRegistrationRequest
+    ): NwcGetResponse {
+        Timber.d(
+            "%snull", "NWC [REGISTER  ] pubkey=${pubkey.take(16)}… " +
+                    "permissions=${request.permissions} "
+        )
+        val result = api.registerNwcKey(
+            adminKey = secrets.adminKey(),
+            pubkey   = pubkey,
+            request  = request
+        )
+        Timber.i("NWC [REGISTER  ] registered key pubkey=${pubkey.take(16)}… ✓")
+        return result
+    }
+
+    /**
+     * Deletes an NWC connection key by its public key.
+     * Requires admin key.
+     */
+    override suspend fun deleteNwcKey(pubkey: String) {
+        Timber.d("NWC [DELETE    ] pubkey=${pubkey.take(16)}…")
+        api.deleteNwcKey(
+            adminKey = secrets.adminKey(),
+            pubkey   = pubkey
+        )
+        Timber.i("NWC [DELETE    ] deleted key pubkey=${pubkey.take(16)}… ✓")
+    }
+
+    /**
+     * Returns the pairing URL (nostr+walletconnect://…) for a given secret.
+     */
+    override suspend fun getNwcPairingUrl(secret: String): String {
+        Timber.d("NWC [PAIRING   ] fetching pairing URL for secret=${secret.take(8)}…")
+        val url = api.getNwcPairingUrl(
+            invoiceKey = secrets.invoiceKey(),
+            secret = secret
+        )
+        Timber.i("NWC [PAIRING   ] pairing URL received ✓")
+        return url
+    }
+
+    /**
+     * Returns all extension configuration settings.
+     * Requires admin key.
+     */
+    override suspend fun getNwcConfig(): Map<String, Any> {
+        Timber.d("NWC [CONFIG    ] fetching all config settings")
+        val result = api.getNwcConfig(secrets.adminKey())
+        Timber.i("NWC [CONFIG    ] received ${result.size} setting(s)")
+        return result
+    }
+
+    /**
+     * Returns a single configuration value by key.
+     * Requires admin key.
+     */
+    override suspend fun getNwcConfigValue(key: String): Map<String, Any> {
+        Timber.d("NWC [CONFIG    ] fetching config key='$key'")
+        val result = api.getNwcConfigValue(
+            adminKey = secrets.adminKey(),
+            key      = key
+        )
+        Timber.i("NWC [CONFIG    ] received value for key='$key'")
+        return result
+    }
+
+    /**
+     * Sets / updates one or more configuration values.
+     * Requires admin key.
+     */
+    override suspend fun setNwcConfig(config: Map<String, Any>): Map<String, Any> {
+        Timber.d("NWC [CONFIG SET] updating ${config.size} setting(s): keys=${config.keys}")
+        val result = api.setNwcConfig(
+            adminKey = secrets.adminKey(),
+            config   = config
+        )
+        Timber.i("NWC [CONFIG SET] config updated ✓")
+        return result
+    }
 }

app/src/main/java/com/bitcointxoko/gudariwallet/data/LightningAddressStore.kt

@@ -38,8 +38,7 @@ class LightningAddressStore(private val context: Context) {
         .map { prefs ->
             prefs[KEY_ADDRESS].also { address ->
                 _currentAddress = address
-                Timber.d("LNADDR [CACHE   ] read from cache: " +
-                        if (address != null) "\"$address\"" else "(empty — nothing cached yet)")            }
+                Timber.d("LNADDR [CACHE   ] read from cache: %s", if (address != null) "\"$address\"" else "(empty — nothing cached yet)")            }
         }
 
     suspend fun isCacheStale(): Boolean {
@@ -53,9 +52,8 @@ class LightningAddressStore(private val context: Context) {
                 val fetchedAt = prefs[KEY_FETCHED_AT] ?: 0L
                 val age       = System.currentTimeMillis() - fetchedAt
                 val isStale   = address == null || age > LNADDRESS_TTL_MS
-                Timber.d("LNADDR [TTL     ] cached=${address != null} " +
-                        "age=${age / 1000}s ttl=${LNADDRESS_TTL_MS / 1000}s " +
-                        if (isStale) "→ cache stale, will fetch from API"
+                Timber.d("%s%s", "LNADDR [TTL     ] cached=${address != null} " +
+                        "age=${age / 1000}s ttl=${LNADDRESS_TTL_MS / 1000}s ", if (isStale) "→ cache stale, will fetch from API"
                         else         "→ cache fresh, skipping API call")
                 isStale
             }

app/src/main/java/com/bitcointxoko/gudariwallet/data/LnurlCacheRepository.kt

@@ -2,7 +2,7 @@ package com.bitcointxoko.gudariwallet.data
 
 import android.content.Context
 import timber.log.Timber
-import com.bitcointxoko.gudariwallet.api.GsonProvider
+import com.bitcointxoko.gudariwallet.api.JsonProvider
 import com.bitcointxoko.gudariwallet.api.LnurlScanResponse
 import com.bitcointxoko.gudariwallet.data.db.AppDatabase
 import com.bitcointxoko.gudariwallet.data.db.LnurlCacheEntity
@@ -13,7 +13,7 @@ private const val TAG = "LnurlCacheRepository"
 class LnurlCacheRepository(context: Context) {
 
     private val dao = AppDatabase.getInstance(context).lnurlCacheDao()
-    private val gson = GsonProvider.gson
+    private val json = JsonProvider.json
 
     // Fast in-memory path — avoids a DB round-trip for keys already loaded
     // this session. Mirrors the pattern used in PaymentCacheRepository.
@@ -39,7 +39,7 @@ class LnurlCacheRepository(context: Context) {
             return null
         }
 
-        val response = deserialise(entity.responseJson) ?: run {
+        val response = deserialize(entity.responseJson) ?: run {
             Timber.w("LNURL [DESER ERR  ] $key — removing corrupt entry")
             evict(key)
             return null
@@ -62,13 +62,13 @@ class LnurlCacheRepository(context: Context) {
      */
     suspend fun put(key: String, response: LnurlScanResponse) {
         val disposable = response.disposable
-        if ( disposable == true) {
+        if (disposable == true) {
             Timber.d("LNURL [SKIP CACHE ] $key — disposable=$disposable, not caching")
             return
         }
         val entity = LnurlCacheEntity(
             key          = key,
-            responseJson = gson.toJson(response),
+            responseJson = json.encodeToString(LnurlScanResponse.serializer(), response),
             savedAt      = System.currentTimeMillis()
         )
         runCatching {
@@ -104,7 +104,7 @@ class LnurlCacheRepository(context: Context) {
         runCatching { dao.deleteByKey(key) }
     }
 
-    private fun deserialise(json: String): LnurlScanResponse? =
-        runCatching { gson.fromJson(json, LnurlScanResponse::class.java) }
+    private fun deserialize(jsonString: String): LnurlScanResponse? =
+        runCatching { json.decodeFromString(LnurlScanResponse.serializer(), jsonString) }
             .getOrNull()
 }

app/src/main/java/com/bitcointxoko/gudariwallet/data/NwcCacheRepository.kt

@@ -0,0 +1,137 @@
+package com.bitcointxoko.gudariwallet.data
+
+import android.app.Application
+import com.bitcointxoko.gudariwallet.api.NwcBudget
+import com.bitcointxoko.gudariwallet.api.NwcGetResponse
+import com.bitcointxoko.gudariwallet.api.NwcKey
+import com.bitcointxoko.gudariwallet.data.db.AppDatabase
+import com.bitcointxoko.gudariwallet.data.db.NwcBudgetEntity
+import com.bitcointxoko.gudariwallet.data.db.NwcKeyDao
+import com.bitcointxoko.gudariwallet.data.db.NwcKeyEntity
+import kotlinx.coroutines.flow.Flow
+
+class NwcCacheRepository(app: Application) {
+    private val dao: NwcKeyDao = AppDatabase.getInstance(app).nwcKeyDao()
+
+    // ── Observe (for ViewModels to collect) ───────────────────────────
+
+    fun observeKeys(): Flow<List<NwcKeyEntity>> = dao.observeAll()
+
+    fun observeKey(pubkey: String): Flow<NwcKeyEntity?> = dao.observeKey(pubkey)
+
+    fun observeBudgets(pubkey: String): Flow<List<NwcBudgetEntity>> =
+        dao.observeBudgets(pubkey)
+
+    // ── Sync (called after network fetches) ───────────────────────────
+    // One-shot synchronous read — for startup population only
+    suspend fun getKeysOnce(): List<NwcGetResponse> =
+        dao.getAllKeys().map { it.toDomain().toGetResponse() }
+
+    /**
+     * Smart sync for the full key list.
+     *
+     * - New keys (not yet cached) → full insert
+     * - Existing keys → update last_used only (all other fields are immutable)
+     * - Keys present in cache but absent from server response → evict
+     *
+     * Never overwrites immutable fields on existing rows.
+     */
+    suspend fun syncKeys(responses: List<NwcGetResponse>) {
+        val incoming = responses.associateBy { it.data.pubkey }
+        val cached   = dao.getAllPubkeys().toSet()
+
+        dao.syncTransaction {
+            val newPubkeys = incoming.keys - cached
+            newPubkeys.forEach { pubkey ->
+                val response = incoming.getValue(pubkey)
+                dao.insertKey(response.data.toEntity())
+                dao.insertBudgets(response.budgets.map { it.toEntity() })
+            }
+
+            val existingPubkeys = incoming.keys intersect cached
+            existingPubkeys.forEach { pubkey ->
+                dao.updateLastUsed(pubkey, incoming.getValue(pubkey).data.last_used)
+            }
+
+            val removedPubkeys = cached - incoming.keys
+            if (removedPubkeys.isNotEmpty()) {
+                dao.deleteKeys(removedPubkeys)
+            }
+        }
+    }
+
+    /**
+     * Write a single key response into the cache.
+     * Used after registerNwcKey() — inserts the new key exactly once.
+     * IGNORE conflict strategy on the DAO ensures this is a no-op if
+     * somehow called twice for the same pubkey.
+     */
+    suspend fun saveKey(response: NwcGetResponse) {
+        dao.insertKey(response.data.toEntity())
+        dao.insertBudgets(response.budgets.map { it.toEntity() })
+    }
+
+    /**
+     * Update only last_used for a single key.
+     * Called after getNwcKey(refreshLastUsed = true) on the detail screen.
+     */
+    suspend fun refreshLastUsed(pubkey: String, lastUsed: Long) {
+        dao.updateLastUsed(pubkey, lastUsed)
+    }
+
+    /**
+     * Evict a key from the cache.
+     * Called after a successful deleteNwcKey() network call.
+     * CASCADE on the FK removes associated budgets automatically.
+     */
+    suspend fun deleteKey(pubkey: String) {
+        dao.deleteKey(pubkey)
+    }
+}
+
+// ── Mappers ───────────────────────────────────────────────────────────
+// Kept in this file — they exist solely to serve NwcCacheRepository.
+// If mappers grow (e.g. reverse domain→entity direction is needed),
+// extract to NwcEntityMappers.kt.
+
+private fun NwcKey.toEntity(): NwcKeyEntity = NwcKeyEntity(
+    pubkey      = pubkey,
+    wallet      = wallet,
+    description = description,
+    expiresAt   = expires_at,
+    permissions = permissions,
+    createdAt   = created_at,
+    lastUsed    = last_used,
+    cachedAt    = System.currentTimeMillis() / 1000L
+)
+
+private fun NwcBudget.toEntity(): NwcBudgetEntity = NwcBudgetEntity(
+    id               = id,
+    pubkey           = pubkey,
+    budgetMsats      = budget_msats,
+    refreshWindow    = refresh_window,
+    createdAt        = created_at,
+    usedBudgetMsats  = used_budget_msats
+)
+
+fun NwcKeyEntity.toDomain(): NwcKey = NwcKey(
+    pubkey      = pubkey,
+    wallet      = wallet,
+    description = description,
+    expires_at  = expiresAt,
+    permissions = permissions,
+    created_at  = createdAt,
+    last_used   = lastUsed
+)
+
+fun NwcBudgetEntity.toDomain(): NwcBudget = NwcBudget(
+    id               = id,
+    pubkey           = pubkey,
+    budget_msats     = budgetMsats,
+    refresh_window   = refreshWindow,
+    created_at       = createdAt,
+    used_budget_msats = usedBudgetMsats
+)
+
+fun NwcKey.toGetResponse() = NwcGetResponse(data = this, budgets = emptyList())
+

app/src/main/java/com/bitcointxoko/gudariwallet/data/PaymentCacheRepository.kt

@@ -109,9 +109,8 @@ class PaymentCacheRepository(context: Context) {
             minCreatedAt  = filter.minCreatedAt,
             maxCreatedAt  = filter.maxCreatedAt
         ).map { it.toDomain() }.also {
-            Timber.d("PAYMENTS [QUERY    ] q=$searchQuery status=$statusPattern " +
-                    "amt=${filter.minAmountSat}–${filter.maxAmountSat} " +
-                    "date=${filter.minCreatedAt}–${filter.maxCreatedAt} → ${it.size} rows")
+            Timber.d("%snull", "PAYMENTS [QUERY    ] q=$searchQuery status=$statusPattern " +
+                    "amt=${filter.minAmountSat}–${filter.maxAmountSat} ")
         }
     }
 
@@ -160,4 +159,34 @@ class PaymentCacheRepository(context: Context) {
         dao.deleteAll()
         Timber.d("PAYMENTS [CLEARED   ] cache wiped")
     }
+
+    /**
+     * Fetch payments by checkingId with the full PaymentFilter applied.
+     * Used by HistoryViewModel for contact name search supplement and
+     * contact ID filter. Amount/date/status are applied in SQL;
+     * direction and type are handled in-memory afterwards (same as queryAll).
+     */
+    suspend fun queryByCheckingIds(
+        checkingIds : List<String>,
+        filter      : PaymentFilter
+    ): List<PaymentRecord> {
+        if (checkingIds.isEmpty()) return emptyList()
+        val statusPattern: String? = if (filter.statuses.isEmpty()) null else {
+            filter.statuses.flatMap { s ->
+                when (s) {
+                    StatusFilter.COMPLETED -> listOf("success", "complete", "paid")
+                    StatusFilter.PENDING   -> listOf("pending", "in_flight", "inflight")
+                    StatusFilter.FAILED    -> listOf("failed", "error", "expired")
+                }
+            }.joinToString(",")
+        }
+        return dao.getByCheckingIdsFiltered(
+            checkingIds   = checkingIds,
+            minAmountMsat = filter.minAmountSat?.let { it * 1000L },
+            maxAmountMsat = filter.maxAmountSat?.let { it * 1000L },
+            minCreatedAt  = filter.minCreatedAt,
+            maxCreatedAt  = filter.maxCreatedAt,
+            statusPattern = statusPattern
+        ).map { it.toDomain() }
+    }
 }

app/src/main/java/com/bitcointxoko/gudariwallet/data/WalletRepository.kt

@@ -1,6 +1,8 @@
 package com.bitcointxoko.gudariwallet.data
 
 import com.bitcointxoko.gudariwallet.api.LnurlScanResponse
+import com.bitcointxoko.gudariwallet.api.NwcGetResponse
+import com.bitcointxoko.gudariwallet.api.NwcRegistrationRequest
 import com.bitcointxoko.gudariwallet.api.PaginatedPaymentsResponse
 import com.bitcointxoko.gudariwallet.api.PaymentDetailResponse
 import com.bitcointxoko.gudariwallet.api.PaymentRecord
@@ -41,4 +43,20 @@ interface WalletRepository {
     suspend fun getPaymentDetail(checkingId: String): PaymentDetailResponse
     suspend fun getFiatRate(currency: String): Double
     suspend fun getSupportedCurrencies(): List<String>
+    suspend fun getNwcPermissions(): Map<String, Any>
+    suspend fun getNwcKeys(includeExpired: Boolean = false): List<NwcGetResponse>
+    suspend fun getNwcKey(
+        pubkey          : String,
+        includeExpired  : Boolean = false,
+        refreshLastUsed : Boolean = false
+    ): NwcGetResponse
+    suspend fun registerNwcKey(
+        pubkey  : String,
+        request : NwcRegistrationRequest
+    ): NwcGetResponse
+    suspend fun deleteNwcKey(pubkey: String)
+    suspend fun getNwcPairingUrl(secret: String): String
+    suspend fun getNwcConfig(): Map<String, Any>
+    suspend fun getNwcConfigValue(key: String): Map<String, Any>
+    suspend fun setNwcConfig(config: Map<String, Any>): Map<String, Any>
 }

app/src/main/java/com/bitcointxoko/gudariwallet/data/db/AppDatabase.kt

@@ -13,8 +13,13 @@ import androidx.sqlite.db.SupportSQLiteDatabase
         PaymentRecordEntity::class,
         LnurlCacheEntity::class,
         NodeAliasCacheEntity::class,
+        NwcKeyEntity::class,
+        NwcBudgetEntity::class,
+        ContactEntity::class,
+        PaymentAddressEntity::class,
+        TxContactCrossRef::class,
     ],
-    version = 6,
+    version = 9,
     exportSchema = false
 )
 @TypeConverters(PaymentConverters::class)
@@ -23,6 +28,8 @@ abstract class AppDatabase : RoomDatabase() {
     abstract fun paymentDao(): PaymentDao
     abstract fun lnurlCacheDao(): LnurlCacheDao
     abstract fun nodeAliasCacheDao(): NodeAliasCacheDao
+    abstract fun nwcKeyDao(): NwcKeyDao
+    abstract fun contactDao(): ContactDao
 
     companion object {
         @Volatile private var INSTANCE: AppDatabase? = null
@@ -86,6 +93,108 @@ abstract class AppDatabase : RoomDatabase() {
             }
         }
 
+        val MIGRATION_6_7 = object : Migration(6, 7) {
+            override fun migrate(db: SupportSQLiteDatabase) {
+                db.execSQL("""
+                CREATE TABLE IF NOT EXISTS nwc_keys (
+                    pubkey       TEXT    NOT NULL PRIMARY KEY,
+                    wallet       TEXT    NOT NULL,
+                    description  TEXT    NOT NULL,
+                    expires_at   INTEGER NOT NULL,
+                    permissions  TEXT    NOT NULL,
+                    created_at   INTEGER NOT NULL,
+                    last_used    INTEGER NOT NULL,
+                    cached_at    INTEGER NOT NULL
+                )
+            """.trimIndent())
+
+                db.execSQL("""
+                CREATE TABLE IF NOT EXISTS nwc_budgets (
+                    id                 INTEGER NOT NULL PRIMARY KEY,
+                    pubkey             TEXT    NOT NULL,
+                    budget_msats       INTEGER NOT NULL,
+                    refresh_window     INTEGER NOT NULL,
+                    created_at         INTEGER NOT NULL,
+                    used_budget_msats  INTEGER NOT NULL,
+                    FOREIGN KEY(pubkey) REFERENCES nwc_keys(pubkey)
+                        ON DELETE CASCADE
+                )
+            """.trimIndent())
+
+                db.execSQL("""
+                CREATE INDEX IF NOT EXISTS index_nwc_budgets_pubkey
+                ON nwc_budgets(pubkey)
+            """.trimIndent())
+            }
+        }
+
+        val MIGRATION_7_8 = object : Migration(7, 8) {
+            override fun migrate(db: SupportSQLiteDatabase) {
+                db.execSQL("""
+                    CREATE TABLE IF NOT EXISTS contacts (
+                        id          TEXT NOT NULL PRIMARY KEY,
+                        localAlias  TEXT,
+                        displayName TEXT,
+                        name        TEXT,
+                        pictureUrl  TEXT,
+                        nostrPubkey TEXT,
+                        nip05       TEXT,
+                        about       TEXT,
+                        lnAddress   TEXT,
+                        createdAt   INTEGER NOT NULL,
+                        updatedAt   INTEGER NOT NULL
+                    )
+                """.trimIndent())
+
+                db.execSQL("""
+                    CREATE UNIQUE INDEX IF NOT EXISTS index_contacts_nostrPubkey
+                    ON contacts(nostrPubkey)
+                """.trimIndent())
+
+                db.execSQL("""
+                    CREATE INDEX IF NOT EXISTS index_contacts_lnAddress
+                    ON contacts(lnAddress)
+                """.trimIndent())
+
+                db.execSQL("""
+                    CREATE TABLE IF NOT EXISTS payment_addresses (
+                        id          TEXT NOT NULL PRIMARY KEY,
+                        contactId   TEXT NOT NULL,
+                        type        TEXT NOT NULL,
+                        address     TEXT NOT NULL,
+                        label       TEXT,
+                        isDefault   INTEGER NOT NULL DEFAULT 0,
+                        addedAt     INTEGER NOT NULL,
+                        FOREIGN KEY(contactId) REFERENCES contacts(id)
+                            ON DELETE CASCADE
+                    )
+                """.trimIndent())
+
+                db.execSQL("""
+                    CREATE INDEX IF NOT EXISTS index_payment_addresses_contactId
+                    ON payment_addresses(contactId)
+                """.trimIndent())
+            }
+        }
+
+        val MIGRATION_8_9 = object : Migration(8, 9) {
+            override fun migrate(db: SupportSQLiteDatabase) {
+                db.execSQL("""
+            CREATE TABLE IF NOT EXISTS tx_contact_links (
+                checkingId TEXT NOT NULL,
+                contactId TEXT NOT NULL,
+                role TEXT,
+                createdAt INTEGER NOT NULL,
+                PRIMARY KEY (checkingId, contactId),
+                FOREIGN KEY (checkingId) REFERENCES payment_records(checkingId) ON DELETE CASCADE,
+                FOREIGN KEY (contactId) REFERENCES contacts(id) ON DELETE CASCADE
+            )
+        """)
+                db.execSQL("CREATE INDEX IF NOT EXISTS index_tx_contact_links_checkingId ON tx_contact_links(checkingId)")
+                db.execSQL("CREATE INDEX IF NOT EXISTS index_tx_contact_links_contactId ON tx_contact_links(contactId)")
+            }
+        }
+
         fun getInstance(context: Context): AppDatabase =
             INSTANCE ?: synchronized(this) {
                 INSTANCE ?: Room.databaseBuilder(
@@ -93,7 +202,16 @@ abstract class AppDatabase : RoomDatabase() {
                     AppDatabase::class.java,
                     "gudari_wallet.db"
                 )
-                    .addMigrations(MIGRATION_1_2, MIGRATION_2_3, MIGRATION_3_4, MIGRATION_4_5, MIGRATION_5_6)
+                    .addMigrations(
+                        MIGRATION_1_2,
+                        MIGRATION_2_3,
+                        MIGRATION_3_4,
+                        MIGRATION_4_5,
+                        MIGRATION_5_6,
+                        MIGRATION_6_7,
+                        MIGRATION_7_8,
+                        MIGRATION_8_9
+                    )
                     .build()
                     .also { INSTANCE = it }
             }

app/src/main/java/com/bitcointxoko/gudariwallet/data/db/ContactDao.kt

@@ -0,0 +1,126 @@
+package com.bitcointxoko.gudariwallet.data.db
+
+import androidx.room.*
+import kotlinx.coroutines.flow.Flow
+
+data class ContactWithAddresses(
+    @Embedded val contact: ContactEntity,
+    @Relation(
+        parentColumn = "id",
+        entityColumn = "contactId"
+    )
+    val addresses: List<PaymentAddressEntity>
+)
+
+@Dao
+interface ContactDao {
+
+    // --- Contacts ---
+
+    @Query("SELECT * FROM contacts ORDER BY COALESCE(localAlias, displayName, name) ASC")
+    fun observeAll(): Flow<List<ContactEntity>>
+
+    @Transaction
+    @Query("SELECT * FROM contacts ORDER BY COALESCE(localAlias, displayName, name) ASC")
+    fun observeAllWithAddresses(): Flow<List<ContactWithAddresses>>
+
+    @Transaction
+    @Query("SELECT * FROM contacts WHERE id = :id")
+    fun observeById(id: String): Flow<ContactWithAddresses?>
+
+    @Query("SELECT * FROM contacts WHERE id = :id LIMIT 1")
+    suspend fun getById(id: String): ContactEntity?
+
+    @Query("SELECT c.* FROM contacts c INNER JOIN payment_addresses pa ON pa.contactId = c.id WHERE pa.address = :address LIMIT 1")
+    suspend fun findByAddress(address: String): ContactEntity?
+
+    @Query("SELECT * FROM contacts WHERE lnAddress = :address LIMIT 1")
+    suspend fun findByLnAddress(address: String): ContactEntity?
+
+    @Query("SELECT * FROM contacts WHERE nostrPubkey = :pubkey LIMIT 1")
+    suspend fun findByNostrPubkey(pubkey: String): ContactEntity?
+
+    @Insert(onConflict = OnConflictStrategy.ABORT)
+    suspend fun insert(contact: ContactEntity)
+
+    @Update
+    suspend fun update(contact: ContactEntity)
+
+    @Query("DELETE FROM contacts WHERE id = :id")
+    suspend fun deleteById(id: String)
+
+    // --- Payment addresses ---
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun insertAddress(address: PaymentAddressEntity)
+
+    @Update
+    suspend fun updateAddress(address: PaymentAddressEntity)
+
+    @Query("DELETE FROM payment_addresses WHERE id = :id")
+    suspend fun deleteAddressById(id: String)
+
+    @Query("SELECT * FROM payment_addresses WHERE contactId = :contactId")
+    fun observeAddressesForContact(contactId: String): Flow<List<PaymentAddressEntity>>
+
+    // Clear the isDefault flag for a type before setting a new default
+    @Query("""
+        UPDATE payment_addresses 
+        SET isDefault = 0 
+        WHERE contactId = :contactId AND type = :type
+    """)
+    suspend fun clearDefault(contactId: String, type: String)
+
+    // Insert a link
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun linkPaymentToContact(crossRef: TxContactCrossRef)
+
+    // Delete a link
+    @Query("DELETE FROM tx_contact_links WHERE checkingId = :checkingId AND contactId = :contactId")
+    suspend fun unlinkPaymentFromContact(checkingId: String, contactId: String)
+
+    // Delete all contact links for a payment
+    @Query("DELETE FROM tx_contact_links WHERE checkingId = :checkingId")
+    suspend fun clearContactsForPayment(checkingId: String)
+
+    // Get all contacts linked to a payment
+    @Query("""
+    SELECT c.* FROM contacts c
+    INNER JOIN tx_contact_links tcl ON tcl.contactId = c.id
+    WHERE tcl.checkingId = :checkingId
+""")
+    fun observeContactsForPayment(checkingId: String): Flow<List<ContactEntity>>
+
+    // Get all payments linked to a contact
+    @Query("""
+    SELECT checkingId FROM tx_contact_links
+    WHERE contactId = :contactId
+    ORDER BY createdAt DESC
+""")
+    fun observePaymentIdsForContact(contactId: String): Flow<List<String>>
+
+    // Returns all (checkingId, displayName) pairs that have a linked contact,
+    // so HistoryViewModel can build its lookup map in a single reactive query.
+    @Query("""
+    SELECT tcl.checkingId AS checkingId,
+           COALESCE(c.localAlias, c.displayName, c.name) AS contactName
+    FROM tx_contact_links tcl
+    INNER JOIN contacts c ON c.id = tcl.contactId
+""")
+    fun observePaymentContactNames(): Flow<List<PaymentContactName>>
+
+    // For text search matching contact names — returns checkingIds of matched payments
+    @Query("""
+    SELECT tcl.checkingId FROM tx_contact_links tcl
+    INNER JOIN contacts c ON c.id = tcl.contactId
+    WHERE COALESCE(c.localAlias, c.displayName, c.name) LIKE '%' || :query || '%'
+""")
+    suspend fun findCheckingIdsByContactName(query: String): List<String>
+
+    // For filter-by-contact — returns checkingIds for specific contact IDs
+    @Query("""
+    SELECT DISTINCT checkingId FROM tx_contact_links
+    WHERE contactId IN (:contactIds)
+""")
+    suspend fun findCheckingIdsByContactIds(contactIds: List<String>): List<String>
+}

app/src/main/java/com/bitcointxoko/gudariwallet/data/db/ContactEntity.kt

@@ -0,0 +1,36 @@
+package com.bitcointxoko.gudariwallet.data.db
+
+import androidx.room.Entity
+import androidx.room.Index
+import androidx.room.PrimaryKey
+import java.util.UUID
+
+@Entity(
+    tableName = "contacts",
+    indices = [
+        Index(value = ["nostrPubkey"], unique = true), // null-safe: SQLite allows multiple NULL in unique index
+        Index(value = ["lnAddress"])
+    ]
+)
+data class ContactEntity(
+    @PrimaryKey
+    val id: String = UUID.randomUUID().toString(),
+
+    // --- Display identity ---
+    val localAlias: String?,          // user-set name — highest display priority
+    val displayName: String?,         // future: from nostr kind 0 display_name
+    val name: String?,                // future: from nostr kind 0 name
+    val pictureUrl: String?,          // future: from nostr kind 0 picture
+
+    // --- Nostr identity (all nullable — not used for manual contacts yet) ---
+    val nostrPubkey: String?,         // 32-byte hex; unique index
+    val nip05: String?,               // e.g. user@domain.com
+    val about: String?,               // bio / notes
+
+    // --- Payment fast-access (denormalized for single-row lookup) ---
+    val lnAddress: String?,           // primary Lightning Address (lud16)
+
+    // --- Metadata ---
+    val createdAt: Long = System.currentTimeMillis(),
+    val updatedAt: Long = System.currentTimeMillis()
+)

app/src/main/java/com/bitcointxoko/gudariwallet/data/db/NwcBudgetEntity.kt

@@ -0,0 +1,33 @@
+package com.bitcointxoko.gudariwallet.data.db
+
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.ForeignKey
+import androidx.room.Index
+import androidx.room.PrimaryKey
+
+@Entity(
+    tableName = "nwc_budgets",
+    foreignKeys = [ForeignKey(
+        entity = NwcKeyEntity::class,
+        parentColumns = ["pubkey"],
+        childColumns = ["pubkey"],
+        onDelete = ForeignKey.CASCADE    // auto-cleans budgets when key is deleted
+    )],
+    indices = [Index("pubkey")]
+)
+data class NwcBudgetEntity(
+    @PrimaryKey
+    @ColumnInfo(name = "id")
+    val id: Int,
+    @ColumnInfo(name = "pubkey")
+    val pubkey: String,
+    @ColumnInfo(name = "budget_msats")
+    val budgetMsats: Long,
+    @ColumnInfo(name = "refresh_window")
+    val refreshWindow: Int,
+    @ColumnInfo(name = "created_at")
+    val createdAt: Long,
+    @ColumnInfo(name = "used_budget_msats")
+    val usedBudgetMsats: Long
+)

app/src/main/java/com/bitcointxoko/gudariwallet/data/db/NwcKeyDao.kt

@@ -0,0 +1,97 @@
+package com.bitcointxoko.gudariwallet.data.db
+
+import androidx.room.Dao
+import androidx.room.Insert
+import androidx.room.OnConflictStrategy
+import androidx.room.Query
+import androidx.room.Transaction
+import kotlinx.coroutines.flow.Flow
+
+@Dao
+interface NwcKeyDao {
+
+    // ── Observe (UI layer subscriptions) ──────────────────────────────
+
+    /**
+     * Live stream of all cached keys, newest first.
+     * Room re-emits automatically on any write — this is the only
+     * channel the list screen needs to collect.
+     */
+    @Query("SELECT * FROM nwc_keys ORDER BY created_at DESC")
+    fun observeAll(): Flow<List<NwcKeyEntity>>
+
+    /**
+     * Live stream of a single key — for the detail screen.
+     * Emits null if the key has been evicted (e.g. after a delete).
+     */
+    @Query("SELECT * FROM nwc_keys WHERE pubkey = :pubkey")
+    fun observeKey(pubkey: String): Flow<NwcKeyEntity?>
+
+    /**
+     * Live stream of budgets for a given key — for the detail screen.
+     * CASCADE delete on the parent ensures this automatically becomes
+     * empty when the parent key is deleted.
+     */
+    @Query("SELECT * FROM nwc_budgets WHERE pubkey = :pubkey")
+    fun observeBudgets(pubkey: String): Flow<List<NwcBudgetEntity>>
+
+    // ── One-shot reads (sync logic, not UI) ───────────────────────────
+
+    /**
+     * Lightweight membership check used by syncKeys() to determine
+     * which incoming keys are new vs. already cached.
+     * Returns only pubkeys — avoids loading full rows unnecessarily.
+     */
+    @Query("SELECT pubkey FROM nwc_keys")
+    suspend fun getAllPubkeys(): List<String>
+
+    /**
+     * One-shot full read of all cached keys — used for instant startup
+     * population before the Flow subscription is active.
+     * Same query as observeAll() but returns a plain list instead of Flow.
+     */
+    @Query("SELECT * FROM nwc_keys ORDER BY created_at DESC")
+    suspend fun getAllKeys(): List<NwcKeyEntity>
+
+    // ── Writes ────────────────────────────────────────────────────────
+
+    /**
+     * Insert a brand-new key. IGNORE on conflict means an existing row
+     * is never overwritten by this path — all immutable fields are safe.
+     * Used exclusively when a key is first seen (creation or first sync).
+     */
+    @Insert(onConflict = OnConflictStrategy.IGNORE)
+    suspend fun insertKey(key: NwcKeyEntity)
+
+    @Transaction
+    suspend fun syncTransaction(block: suspend () -> Unit) = block()
+
+    /**
+     * Insert budgets for a new key. Also IGNORE on conflict —
+     * budget fields are immutable post-creation.
+     */
+    @Insert(onConflict = OnConflictStrategy.IGNORE)
+    suspend fun insertBudgets(budgets: List<NwcBudgetEntity>)
+
+    /**
+     * Update ONLY last_used — the single mutable field on a key.
+     * This is the only update path that should ever run post-creation.
+     */
+    @Query("UPDATE nwc_keys SET last_used = :lastUsed WHERE pubkey = :pubkey")
+    suspend fun updateLastUsed(pubkey: String, lastUsed: Long)
+
+    /**
+     * Evict a key by pubkey. The CASCADE foreign key on nwc_budgets
+     * automatically deletes all associated budget rows — no manual
+     * budget cleanup needed.
+     */
+    @Query("DELETE FROM nwc_keys WHERE pubkey = :pubkey")
+    suspend fun deleteKey(pubkey: String)
+
+    /**
+     * Evict a set of keys in one statement — used by syncKeys() to
+     * remove server-deleted keys without issuing N individual deletes.
+     */
+    @Query("DELETE FROM nwc_keys WHERE pubkey IN (:pubkeys)")
+    suspend fun deleteKeys(pubkeys: Collection<String>)
+}

app/src/main/java/com/bitcointxoko/gudariwallet/data/db/NwcKeyEntity.kt

@@ -0,0 +1,26 @@
+package com.bitcointxoko.gudariwallet.data.db
+
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+@Entity(tableName = "nwc_keys")
+data class NwcKeyEntity(
+    @PrimaryKey
+    @ColumnInfo(name = "pubkey")
+    val pubkey: String,
+    @ColumnInfo(name = "wallet")
+    val wallet: String,
+    @ColumnInfo(name = "description")
+    val description: String,
+    @ColumnInfo(name = "expires_at")
+    val expiresAt: Long,
+    @ColumnInfo(name = "permissions")
+    val permissions: String,   // stored as comma-separated string
+    @ColumnInfo(name = "created_at")
+    val createdAt: Long,
+    @ColumnInfo(name = "last_used")
+    val lastUsed: Long,
+    @ColumnInfo(name = "cached_at")
+    val cachedAt: Long         // epoch-seconds, used for staleness check if desired
+)

app/src/main/java/com/bitcointxoko/gudariwallet/data/db/PaymentAddressEntity.kt

@@ -0,0 +1,42 @@
+package com.bitcointxoko.gudariwallet.data.db
+
+import androidx.room.Entity
+import androidx.room.ForeignKey
+import androidx.room.Index
+import androidx.room.PrimaryKey
+import java.util.UUID
+
+@Entity(
+    tableName = "payment_addresses",
+    foreignKeys = [
+        ForeignKey(
+            entity = ContactEntity::class,
+            parentColumns = ["id"],
+            childColumns = ["contactId"],
+            onDelete = ForeignKey.CASCADE
+        )
+    ],
+    indices = [Index("contactId")]
+)
+data class PaymentAddressEntity(
+    @PrimaryKey
+    val id: String = UUID.randomUUID().toString(),
+
+    val contactId: String,           // FK → contacts.id
+
+    val type: String,                // PaymentAddressType.name (stored as String)
+    val address: String,             // the raw address value
+    val label: String? = null,       // e.g. "personal", "savings"
+    val isDefault: Boolean = false,
+    val addedAt: Long = System.currentTimeMillis()
+)
+
+// Keep as a simple enum in the same file or a separate file
+enum class PaymentAddressType {
+    LIGHTNING_ADDRESS,  // user@domain.com (lud16)
+    LNURL,              // bech32 lnurl (lud06)
+    ON_CHAIN,           // Bitcoin address
+    SILENT_PAYMENT,     // BIP-352 sp1...
+    BOLT12_OFFER,       // lno...
+    BIP353              // ₿user@domain.com
+}

app/src/main/java/com/bitcointxoko/gudariwallet/data/db/PaymentContactName.kt

@@ -0,0 +1,6 @@
+package com.bitcointxoko.gudariwallet.data.db
+
+data class PaymentContactName(
+    val checkingId  : String,
+    val contactName : String
+)

app/src/main/java/com/bitcointxoko/gudariwallet/data/db/PaymentConverters.kt

@@ -1,19 +1,19 @@
 package com.bitcointxoko.gudariwallet.data.db
 
 import androidx.room.TypeConverter
+import com.bitcointxoko.gudariwallet.api.JsonProvider
 import com.bitcointxoko.gudariwallet.api.PaymentExtra
-import com.bitcointxoko.gudariwallet.api.GsonProvider
 
 object PaymentConverters {
-    private val gson = GsonProvider.gson
+    private val json = JsonProvider.json
 
     @TypeConverter
     @JvmStatic
     fun fromExtra(extra: PaymentExtra?): String? =
-        extra?.let { gson.toJson(it) }
+        extra?.let { json.encodeToString(PaymentExtra.serializer(), it) }
 
     @TypeConverter
     @JvmStatic
-    fun toExtra(json: String?): PaymentExtra? =
-        json?.let { gson.fromJson(it, PaymentExtra::class.java) }
+    fun toExtra(string: String?): PaymentExtra? =
+        string?.let { json.decodeFromString(PaymentExtra.serializer(), it) }
 }

app/src/main/java/com/bitcointxoko/gudariwallet/data/db/PaymentDao.kt

@@ -32,6 +32,30 @@ interface PaymentDao {
     @Query("SELECT * FROM payment_records WHERE checkingId = :checkingId LIMIT 1")
     suspend fun getByCheckingId(checkingId: String): PaymentRecordEntity?
 
+    @Query("SELECT * FROM payment_records WHERE checkingId IN (:checkingIds) ORDER BY createdAt DESC")
+    suspend fun getByCheckingIds(checkingIds: List<String>): List<PaymentRecordEntity>
+
+
+    @Query("""
+    SELECT * FROM payment_records
+    WHERE checkingId IN (:checkingIds)
+      AND (:minAmountMsat IS NULL OR ABS(amountMsat) >= :minAmountMsat)
+      AND (:maxAmountMsat IS NULL OR ABS(amountMsat) <= :maxAmountMsat)
+      AND (:minCreatedAt  IS NULL OR createdAt >= :minCreatedAt)
+      AND (:maxCreatedAt  IS NULL OR createdAt <= :maxCreatedAt)
+      AND (:statusPattern IS NULL OR
+               ',' || :statusPattern || ',' LIKE '%,' || lower(status) || ',%')
+    ORDER BY createdAt DESC, time DESC
+""")
+    suspend fun getByCheckingIdsFiltered(
+        checkingIds   : List<String>,
+        minAmountMsat : Long?   = null,
+        maxAmountMsat : Long?   = null,
+        minCreatedAt  : Long?   = null,
+        maxCreatedAt  : Long?   = null,
+        statusPattern : String? = null
+    ): List<PaymentRecordEntity>
+
     @Query("DELETE FROM payment_records")
     suspend fun deleteAll()
 

app/src/main/java/com/bitcointxoko/gudariwallet/data/db/PaymentRecordMapper.kt

@@ -1,12 +1,12 @@
 package com.bitcointxoko.gudariwallet.data.db
 
 import timber.log.Timber
-import com.bitcointxoko.gudariwallet.api.GsonProvider.gson
+import com.bitcointxoko.gudariwallet.api.JsonProvider
+import com.bitcointxoko.gudariwallet.api.PaymentExtra
 import com.bitcointxoko.gudariwallet.api.PaymentRecord
-import com.bitcointxoko.gudariwallet.data.db.PaymentRecordEntity
 
 private const val TAG = "PaymentMappers"
-
+private val json = JsonProvider.json
 
 // ── Parse helper — runs once at write time, never again ──────────────────────
 
@@ -36,10 +36,10 @@ fun PaymentRecord.toEntity(savedAt: Long): PaymentRecordEntity =
         bolt11      = bolt11,
         pending     = pending,
         preimage    = preimage,
-        extra       = extra?.let { gson.toJson(it) },
+        extra       = extra?.let { json.encodeToString(PaymentExtra.serializer(), it) },
         savedAt     = savedAt,
-        pubkey = pubkey,
-        alias  = alias
+        pubkey      = pubkey,
+        alias       = alias
     )
 
 // ── PaymentRecordEntity → PaymentRecord ──────────────────────────────────────
@@ -57,7 +57,7 @@ fun PaymentRecordEntity.toDomain(): PaymentRecord =
         bolt11      = bolt11,
         pending     = pending,
         preimage    = preimage,
-        extra       = extra?.let { gson.fromJson(it, com.bitcointxoko.gudariwallet.api.PaymentExtra::class.java) },
-        pubkey = pubkey,
-        alias  = alias
+        extra       = extra?.let { json.decodeFromString(PaymentExtra.serializer(), it) },
+        pubkey      = pubkey,
+        alias       = alias
     )

app/src/main/java/com/bitcointxoko/gudariwallet/data/db/TxContactCrossRef.kt

@@ -0,0 +1,34 @@
+package com.bitcointxoko.gudariwallet.data.db
+
+import androidx.room.Entity
+import androidx.room.ForeignKey
+import androidx.room.Index
+
+@Entity(
+    tableName = "tx_contact_links",
+    primaryKeys = ["checkingId", "contactId"],
+    foreignKeys = [
+        ForeignKey(
+            entity        = PaymentRecordEntity::class,
+            parentColumns = ["checkingId"],
+            childColumns  = ["checkingId"],
+            onDelete      = ForeignKey.CASCADE
+        ),
+        ForeignKey(
+            entity        = ContactEntity::class,
+            parentColumns = ["id"],
+            childColumns  = ["contactId"],
+            onDelete      = ForeignKey.CASCADE
+        )
+    ],
+    indices = [
+        Index("checkingId"),
+        Index("contactId")
+    ]
+)
+data class TxContactCrossRef(
+    val checkingId : String,
+    val contactId  : String,
+    val role       : String? = null,
+    val createdAt  : Long    = System.currentTimeMillis()
+)

app/src/main/java/com/bitcointxoko/gudariwallet/i18n/EnStrings.kt

@@ -1,7 +1,6 @@
 package com.bitcointxoko.gudariwallet.i18n
 
 import cafe.adriel.lyricist.LyricistStrings
-import kotlin.String
 
 @LyricistStrings(languageTag = "en", default = true)
 val EnHomeStrings = AppStrings(
@@ -55,61 +54,8 @@ val EnHomeStrings = AppStrings(
     details               = "Details",
     enterValidAmount      = "Enter a valid amount",
     satsUnit              = { sats -> "$sats sats" },
-
-    // ── ReceiveScreen — general ───────────────────────────────────────────────
-    receive               = "Receive",
-
-    // ── ReceiveScreen — error ─────────────────────────────────────────────────
-    receiveError          = "Error",
-
-    // ── ReceiveScreen — QR / share ────────────────────────────────────────────
-    lightningAddressQrCode  = "Lightning address QR code",
-    lightningAddressLabel   = "Lightning Address",
-    shareLightningAddress   = "Share Lightning Address",
-    lightningInvoiceQrCode  = "Lightning invoice QR code",
-    invoiceLabel            = "Invoice",
-    shareInvoice            = "Share Invoice",
-
-    // ── ReceiveScreen — amount step ───────────────────────────────────────────
-    amountInSats          = "Amount (sats)",
-    satsRange             = { min, max -> "$min – $max sats" },
-
-    // ── ReceiveScreen — memo step ─────────────────────────────────────────────
-    memoOptional          = "Memo (optional)",
-    memoPlaceholder       = "What's this for?",
-    creatingInvoice       = "Creating invoice…",
-    createInvoice         = "Create Invoice",
-
-    // ── ReceiveScreen — invoice ready ─────────────────────────────────────────
-    waiting               = "Waiting…",
-    invoiceExpired        = "Invoice expired",
-    newInvoice            = "New Invoice",
-
-    // ── ReceiveScreen — lnurl withdraw ────────────────────────────────────────
-    withdrawFrom          = "Withdraw from",
-    minimumSats           = { min -> "Minimum is $min sats" },
-    maximumSats           = { max -> "Maximum is $max sats" },
-    withdrawButton        = "Withdraw",
-    withdrawButtonAmount  = { amount -> "Withdraw $amount sats" },
-
-    // ── ReceiveScreen — success ───────────────────────────────────────────────
-    paymentReceived       = "Payment Received!",
-
-    // ── AmountDisplay ─────────────────────────────────────────────────────────
-    amountDisplaySats = { amount -> "$amount ${if (amount == 1L) "sat" else "sats"}" },
-
-    // ── BrightnessToggleButton & QrDisplayCard ────────────────────────────────
-    brightnessReduce  = "Reduce brightness",
-    brightnessBoost   = "Boost brightness",
-    qrShare           = "Share",
-    qrCopy            = "Copy",
-    qrNfcStop         = "Stop NFC sharing",
-    qrNfcStart        = "Share via NFC",
-
-    // ── ReceiveViewModel ──────────────────────────────────────────────────────
-    receiveVmFailedToCreateInvoice = "Failed to create invoice",
-    receiveVmWithdrawRejected      = "Withdraw service rejected the invoice",
-    receiveVmWithdrawFailed        = "Withdraw failed",
+    today                 = "today",
+    yesterday             = "yesterday",
 
     // ── SendScreen — general ──────────────────────────────────────────────────
     send                  = "Send",
@@ -196,118 +142,6 @@ val EnHomeStrings = AppStrings(
     sendVmUnsupportedType            = { tag -> "Unsupported type: $tag" },
     sendVmPaymentFailedRescan        = "Payment failed — could not re-fetch address",
 
-    // ── HistoryScreen ─────────────────────────────────────────────────────────
-    historyTitle              = "Activity",
-    historyClose              = "Close",
-    historySearchPayments     = "Search payments",
-    historyFilterPayments     = "Filter payments",
-    historyRetry              = "Retry",
-    historyNoPayments         = "No payments yet.",
-    historySearchPlaceholder  = "Search transactions",
-    historySearchHelp         = "Search help",
-    historySearchPaste        = "Paste",
-    historySearchClear        = "Clear search",
-    historySearchChip         = { tail -> "search: …$tail" },
-    historyClearSearch        = "Clear search",
-    filterDirectionOutgoing   = "Outgoing",
-    filterDirectionIncoming   = "Incoming",
-    filterClearDirection      = "Clear direction filter",
-    filterStatusCompleted     = "Completed",
-    filterStatusPending       = "Pending",
-    filterStatusFailed        = "Failed",
-    filterRemoveStatus        = "Remove status filter",
-    filterRemoveType          = "Remove type filter",
-    filterAmountRange         = { min, max -> "$min–$max sats" },
-    filterAmountMin           = { min -> "≥ $min sats" },
-    filterAmountMax           = { max -> "≤ $max sats" },
-    filterClearAmount         = "Clear amount filter",
-    filterDateThisWeek        = "This week",
-    filterDateThisMonth       = "This month",
-    filterDateThisYear        = "This year",
-    filterDateRange           = { from, to -> "$from–$to" },
-    filterDateFrom            = { from -> "From $from" },
-    filterDateUntil           = { until -> "Until $until" },
-    filterClearDate           = "Clear date filter",
-
-    // ── FilterBottomSheet ─────────────────────────────────────────────────────
-    filterSheetTitle          = "Filter payments",
-    filterSectionDirection    = "Direction",
-    filterDirectionAll        = "All",
-    filterSectionStatus       = "Status",
-    filterSectionType         = "Type",
-    filterSectionAmount       = "Amount (sats)",
-    filterAmountMin_label     = "Min",
-    filterAmountMax_label     = "Max",
-    filterAmountSuffix        = "sats",
-    filterSectionDate         = "Date",
-    filterDateFrom_label      = "From",
-    filterDateTo_label        = "To",
-    filterDialogOk            = "OK",
-    filterDialogCancel        = "Cancel",
-
-    // ── SearchInfoSheet ───────────────────────────────────────────────────────
-    searchInfoTitle           = "What can I search for?",
-    searchInfoSubtitle        = "Type any part of the following to find a payment:",
-    searchInfoMemoTitle       = "Memo",
-    searchInfoMemoDesc        = "The message or description attached to a payment. " +
-            "For example, \"coffee\" or \"rent March\".",
-    searchInfoInvoiceTitle    = "Invoice",
-    searchInfoInvoiceDesc     = "The payment request you scanned or pasted to send a payment. " +
-            "It usually starts with \"lnbc…\". " +
-            "You can paste just the first or last few characters.",
-    searchInfoHashTitle       = "Hash",
-    searchInfoHashDesc        = "A unique code that identifies this payment on the " +
-            "Lightning Network. Useful if someone asks you to " +
-            "confirm a specific transaction.",
-    searchInfoPreimageTitle   = "Preimage",
-    searchInfoPreimageDesc    = "A secret code that proves a payment was received. " +
-            "Only available after a payment completes successfully.",
-    searchInfoNodeAliasTitle  = "Node alias",
-    searchInfoNodeAliasDesc   = "The name of the Lightning node you sent a payment to. " +
-            "For example, \"ACINQ\" or \"Wallet of Satoshi\". " +
-            "Aliases are resolved automatically for outgoing payments.",
-    searchInfoNodeIdTitle     = "Node ID (pubkey)",
-    searchInfoNodeIdDesc      = "The public key of the destination node. " +
-            "A 66-character hex string — you can paste just the first few characters.",
-    searchInfoFooter          = "You can paste a full value or search with just a few characters — " +
-            "partial matches work too.",
-
-    // ── PaymentDetailScreen ───────────────────────────────────────────────────
-    statusSuccess              = "Success",   // e.g. "Success"
-    statusPending              = "Pending",   // e.g. "Pending"
-    statusFailed               = "Failed",   // e.g. "Failed"
-    statusUnknown              = "Unknown",   // e.g. "Unknown"
-    detailOutgoingTitle        = "Outgoing payment",
-    detailIncomingTitle        = "Incoming payment",
-    detailBack                 = "Back",
-    detailCouldNotLoad         = "Could not load full details",
-    detailFeeLabel             = { feeSat, fiatPart, ppmPart ->
-        "Fee: $feeSat sats$fiatPart$ppmPart"
-    },
-    detailSectionDetails       = "Details",
-    detailRowDate              = "Date",
-    detailRowMemo              = "Memo",
-    detailRowMemoEmpty         = "—",
-    detailRowType              = "Type",
-    detailRowComment           = "Comment",
-    detailSectionSuccessAction = "Success Action",
-    detailSuccessMessage       = "Message",
-    detailSuccessUrl           = "URL",
-    detailSuccessDescription   = "Description",
-    detailSectionTechnical     = "Technical",
-    detailRowPaymentHash       = "Hash",
-    detailRowPreimage          = "Preimage",
-    detailRowDestination       = "Destination",
-    detailCopyNodeId           = "Copy node ID",
-    detailRowBolt11            = "BOLT11",
-
-    // ── PaymentRow ────────────────────────────────────────────────────────────
-    paymentRowSentCD      = "Sent",
-    paymentRowReceivedCD  = "Received",
-    paymentRowNoMemo      = "No memo",
-    paymentRowPending     = "Pending",
-    paymentRowFailed     = "Failed",
-
     onboarding = OnboardingStrings(
         back                    = "Back",
         next                    = "Next",
@@ -325,6 +159,7 @@ val EnHomeStrings = AppStrings(
         hideAdminKey            = "Hide",
         showAdminKey            = "Show",
         fieldsRequired          = "All fields are required.",
+        invalidKeyFormat        = "Invalid key format",
         connect                 = "Connect",
         notificationsTitle      = "Stay in the loop",
         notificationsSubtitle   = "Get notified instantly when you receive a payment.",
@@ -352,6 +187,301 @@ val EnHomeStrings = AppStrings(
         scheduleSync     = "Schedule sync",
         schedule         = "Schedule",
         cancel           = "Cancel"
-    )
+    ),
+
+    receive = ReceiveStrings(
+        // ── ReceiveScreen — general ───────────────────────────────────────────────
+        receive               = "Receive",
+
+        // ── ReceiveScreen — error ─────────────────────────────────────────────────
+        receiveError          = "Error",
+
+        // ── ReceiveScreen — QR / share ────────────────────────────────────────────
+        lightningAddressQrCode  = "Lightning address QR code",
+        lightningAddressLabel   = "Lightning Address",
+        shareLightningAddress   = "Share Lightning Address",
+        lightningInvoiceQrCode  = "Lightning invoice QR code",
+        invoiceLabel            = "Invoice",
+        shareInvoice            = "Share Invoice",
+
+        // ── ReceiveScreen — amount step ───────────────────────────────────────────
+        amountInSats          = "Amount (sats)",
+        satsRange             = { min, max -> "$min – $max sats" },
+
+        // ── ReceiveScreen — memo step ─────────────────────────────────────────────
+        memoOptional          = "Memo (optional)",
+        memoPlaceholder       = "What's this for?",
+        creatingInvoice       = "Creating invoice…",
+        createInvoice         = "Create Invoice",
+
+        // ── ReceiveScreen — invoice ready ─────────────────────────────────────────
+        waiting               = "Waiting…",
+        invoiceExpired        = "Invoice expired",
+        newInvoice            = "New Invoice",
+
+        // ── ReceiveScreen — lnurl withdraw ────────────────────────────────────────
+        withdrawFrom          = "Withdraw from",
+        minimumSats           = { min -> "Minimum is $min sats" },
+        maximumSats           = { max -> "Maximum is $max sats" },
+        withdrawButton        = "Withdraw",
+        withdrawButtonAmount  = { amount -> "Withdraw $amount sats" },
+
+        // ── ReceiveScreen — success ───────────────────────────────────────────────
+        paymentReceived       = "Payment Received!",
+
+        // ── AmountDisplay ─────────────────────────────────────────────────────────
+        amountDisplaySats = { amount -> "$amount ${if (amount == 1L) "sat" else "sats"}" },
+
+        // ── BrightnessToggleButton & QrDisplayCard ────────────────────────────────
+        brightnessReduce  = "Reduce brightness",
+        brightnessBoost   = "Boost brightness",
+        qrShare           = "Share",
+        qrCopy            = "Copy",
+        qrNfcStop         = "Stop NFC sharing",
+        qrNfcStart        = "Share via NFC",
+        openInApp         = "Open in app",
+        noAppFound        = "No compatible app found",
+
+        // ── ReceiveViewModel ──────────────────────────────────────────────────────
+        receiveVmFailedToCreateInvoice = "Failed to create invoice",
+        receiveVmWithdrawRejected      = "Withdraw service rejected the invoice",
+        receiveVmWithdrawFailed        = "Withdraw failed",
+    ),
+
+    history = HistoryStrings(
+        // ── HistoryScreen ─────────────────────────────────────────────────────────
+        historyTitle              = "Activity",
+        historyClose              = "Close",
+        historySearchPayments     = "Search payments",
+        historyFilterPayments     = "Filter payments",
+        historyRetry              = "Retry",
+        historyNoPayments         = "No payments yet.",
+        historySearchPlaceholder  = "Search transactions",
+        historySearchHelp         = "Search help",
+        historySearchPaste        = "Paste",
+        historySearchClear        = "Clear search",
+        historySearchChip         = { tail -> "search: …$tail" },
+        historyClearSearch        = "Clear search",
+        filterDirectionOutgoing   = "Outgoing",
+        filterDirectionIncoming   = "Incoming",
+        filterClearDirection      = "Clear direction filter",
+        filterStatusCompleted     = "Completed",
+        filterStatusPending       = "Pending",
+        filterStatusFailed        = "Failed",
+        filterRemoveStatus        = "Remove status filter",
+        filterRemoveType          = "Remove type filter",
+        filterAmountRange         = { min, max -> "$min–$max sats" },
+        filterAmountMin           = { min -> "≥ $min sats" },
+        filterAmountMax           = { max -> "≤ $max sats" },
+        filterClearAmount         = "Clear amount filter",
+        filterDateThisWeek        = "This week",
+        filterDateThisMonth       = "This month",
+        filterDateThisYear        = "This year",
+        filterDateRange           = { from, to -> "$from–$to" },
+        filterDateFrom            = { from -> "From $from" },
+        filterDateUntil           = { until -> "Until $until" },
+        filterClearDate           = "Clear date filter",
+
+        // ── FilterBottomSheet ─────────────────────────────────────────────────────
+        filterSheetTitle          = "Filter payments",
+        filterSectionDirection    = "Direction",
+        filterDirectionAll        = "All",
+        filterSectionStatus       = "Status",
+        filterSectionType         = "Type",
+        filterSectionAmount       = "Amount (sats)",
+        filterAmountMin_label     = "Min",
+        filterAmountMax_label     = "Max",
+        filterAmountSuffix        = "sats",
+        filterSectionDate         = "Date",
+        filterDateFrom_label      = "From",
+        filterDateTo_label        = "To",
+        filterDialogOk            = "OK",
+        filterDialogCancel        = "Cancel",
+
+        // ── SearchInfoSheet ───────────────────────────────────────────────────────
+        searchInfoTitle           = "What can I search for?",
+        searchInfoSubtitle        = "Type any part of the following to find a payment:",
+        searchInfoMemoTitle       = "Memo",
+        searchInfoMemoDesc        = "The message or description attached to a payment. " +
+                "For example, \"coffee\" or \"rent March\".",
+        searchInfoInvoiceTitle    = "Invoice",
+        searchInfoInvoiceDesc     = "The payment request you scanned or pasted to send a payment. " +
+                "It usually starts with \"lnbc…\". " +
+                "You can paste just the first or last few characters.",
+        searchInfoHashTitle       = "Hash",
+        searchInfoHashDesc        = "A unique code that identifies this payment on the " +
+                "Lightning Network. Useful if someone asks you to " +
+                "confirm a specific transaction.",
+        searchInfoPreimageTitle   = "Preimage",
+        searchInfoPreimageDesc    = "A secret code that proves a payment was received. " +
+                "Only available after a payment completes successfully.",
+        searchInfoNodeAliasTitle  = "Node alias",
+        searchInfoNodeAliasDesc   = "The name of the Lightning node you sent a payment to. " +
+                "For example, \"ACINQ\" or \"Wallet of Satoshi\". " +
+                "Aliases are resolved automatically for outgoing payments.",
+        searchInfoNodeIdTitle     = "Node ID (pubkey)",
+        searchInfoNodeIdDesc      = "The public key of the destination node. " +
+                "A 66-character hex string — you can paste just the first few characters.",
+        searchInfoFooter          = "You can paste a full value or search with just a few characters — " +
+                "partial matches work too.",
+
+        // ── PaymentDetailScreen ───────────────────────────────────────────────────
+        statusSuccess              = "Success",   // e.g. "Success"
+        statusPending              = "Pending",   // e.g. "Pending"
+        statusFailed               = "Failed",   // e.g. "Failed"
+        statusUnknown              = "Unknown",   // e.g. "Unknown"
+        detailOutgoingTitle        = "Outgoing payment",
+        detailIncomingTitle        = "Incoming payment",
+        detailBack                 = "Back",
+        detailCouldNotLoad         = "Could not load full details",
+        detailFeeLabel             = { feeSat, fiatPart, ppmPart ->
+            "Fee: $feeSat sats$fiatPart$ppmPart"
+        },
+        detailSectionDetails       = "Details",
+        detailRowDate              = "Date",
+        detailRowMemo              = "Memo",
+        detailRowMemoEmpty         = "—",
+        detailRowType              = "Type",
+        detailRowComment           = "Comment",
+        detailSectionSuccessAction = "Success Action",
+        detailSuccessMessage       = "Message",
+        detailSuccessUrl           = "URL",
+        detailSuccessDescription   = "Description",
+        detailSectionTechnical     = "Technical",
+        detailRowPaymentHash       = "Hash",
+        detailRowPreimage          = "Preimage",
+        detailRowDestination       = "Destination",
+        detailCopyNodeId           = "Copy node ID",
+        detailRowBolt11            = "BOLT11",
+
+        // ── PaymentRow ────────────────────────────────────────────────────────────
+        paymentRowSentCD      = "Sent",
+        paymentRowReceivedCD  = "Received",
+        paymentRowNoMemo      = "No memo",
+        paymentRowPending     = "Pending",
+        paymentRowFailed     = "Failed",
+    ),
+
+    nwc = NwcStrings(
+        back     = "Back",
+        next     = "Next",
+        done     = "Done",
+        cancel   = "Cancel",
+        schedule = "Schedule",
+
+        // ── Connection detail ─────────────────────────────────────────────────────
+        connectionDetailTitle       = "Connection",
+        connectionUnknownWallet     = "Unknown app",
+        connectionSectionDetails    = "Details",
+        connectionRowCreated        = "Connected",
+        connectionRowLastUsed       = "Last used",
+        connectionRowExpires        = "Expires",
+        connectionRowPubkey         = "Public key",
+        connectionNeverUsed         = "Never",
+        lastUsedToday     = "Last used today",
+        lastUsedYesterday = "Last used yesterday",
+        lastUsedDate      = "Last used %s",
+        connectionNoExpiry          = "Never",
+        connectionExpired           = { date -> "Expired · $date" },
+        connectionSectionPermissions = "Permissions",
+        connectionSectionBudgets    = "Spending budgets",
+        connectionBudgetTitle       = { window -> "$window budget" },
+        connectionBudgetUsed        = { sats -> "Used: $sats sats" },
+        connectionBudgetTotal       = { sats -> "of $sats sats" },
+        connectionRevoke            = "Revoke connection",
+        connectionStatusActive      = "Active",
+        connectionStatusExpired     = "Expired",
+
+        // ── NWC permissions ───────────────────────────────────────────────────────
+        permPayInvoice              = "Pay invoices",
+        permGetBalance              = "Read balance",
+        permGetInfo                 = "Read wallet info",
+        permMakeInvoice             = "Create invoices",
+        permLookupInvoice           = "Look up invoices",
+        permListTransactions        = "View transaction history",
+        permSignMessage             = "Sign messages",
+        permPay           = "Send payments",
+        permInvoice       = "Create invoices",
+        permLookup  = "Lookup invoice status",
+        permHistory = "Read transaction history",
+        permBalance = "Read wallet balance",
+        permInfo    = "Read account info",
+        permLookupHistory = "Lookup status & transaction history",
+        permBalanceInfo   = "Read balance & account info",
+        permSendPayments           = "Send payments",
+        permCreateInvoices         = "Create invoices",
+        permLookupInvoiceStatus    = "Lookup status of invoice",
+        permReadTransactionHistory = "Read transaction history",
+        permReadWalletBalance      = "Read wallet balance",
+        permReadAccountInfo        = "Read account info",
+        revokeDialogTitle   = "Revoke connection?",
+        revokeDialogBody    = "This will permanently revoke this Nostr Wallet Connect key. Any app using it will lose access.",
+        revokeDialogConfirm = "Revoke",
+        revokeDialogDismiss = "Cancel",
+        refreshDaily   = "Daily",
+        refreshWeekly  = "Weekly",
+        refreshMonthly = "Monthly",
+        refreshYearly  = "Yearly",
+        refreshNever   = "Never",
+
+        newConnection       = "New connection",
+        labelHint           = "Label (e.g. Amethyst, Bitrefill)",
+        expires             = "Expires",
+        pickDate            = "Pick date",
+        pickTime            = "Pick time",
+        never               = "Never",
+        budgets             = "Budgets",
+        addBudget           = "Add budget",
+        removeBudget        = "Remove budget",
+        permissions         = "Permissions",
+        unnamed             = "Unnamed",
+        creating            = "Creating…",
+        createConnection    = "Create connection",
+        ok                  = "OK",
+        sats                = "Sats",
+        resets              = "Resets",
+
+        deleteConnection     = "Delete connection",
+        unnamedConnection    = "Unnamed connection",
+        neverUsed            = "Never used",
+        expired              = "Expired",
+
+        connectionCreated         = "Connection created",
+        scanOrCopyHint            = "Scan or copy this connection string into your app. It will not be shown again.",
+        nwcPairingQrCode          = "NWC pairing QR code",
+        nwcConnectionString       = "NWC connection string",
+        shareNwcConnectionString  = "Share NWC connection string",
+        openInApp                 = "Open in app",
+
+        walletConnect          = "Wallet Connect",
+        addConnection          = "Add connection",
+        noCompatibleAppFound   = "No compatible app found",
+        removeConnection       = "Remove connection?",
+        removeConnectionDetail = "This will permanently revoke this Nostr Wallet Connect key. Any app using it will lose access.",
+        remove                 = "Remove",
+
+        noConnectionsYet    = "No connections yet",
+        tapToAddHint        = "Tap + to connect an app via Nostr Wallet Connect.",
+        somethingWentWrong  = "Something went wrong",
+        retry               = "Retry",
+
+        failedToLoadConnections  = "Failed to load connections",
+        failedToCreateConnection = "Failed to create connection",
+        failedToDeleteConnection = "Failed to delete connection",
+        failedToLoadConnection   = "Failed to load connection",
+        ),
+
+    lock = LockStrings(
+        appLockTitle             = "App Lock",
+        appLockDescription       = "Require biometric authentication (fingerprint, face, or PIN) every time you open Gudari Wallet.",
+        appLockToggleLabel       = "Lock app on open",
+        appLockToggleEnabled     = "Enabled (recommended)",
+        appLockToggleDisabled    = "Disabled",
+        appName                  = "Gudari Wallet",
+        authenticateToContinue   = "Authenticate to continue",
+        unlockButton             = "Unlock",
+        biometricPromptTitle     = "Unlock Gudari Wallet",
+        biometricPromptSubtitle  = "Authenticate to access your wallet",
+    ),
 )
 

app/src/main/java/com/bitcointxoko/gudariwallet/i18n/EsStrings.kt

@@ -54,61 +54,8 @@ val EsHomeStrings = AppStrings(
     details               = "Detalles",
     enterValidAmount      = "Introduce una cantidad válida",
     satsUnit              = { sats -> "$sats sats" },
-
-    // ── ReceiveScreen — general ───────────────────────────────────────────────
-    receive               = "Recibir",
-
-    // ── ReceiveScreen — error ─────────────────────────────────────────────────
-    receiveError          = "Error",
-
-    // ── ReceiveScreen — QR / share ────────────────────────────────────────────
-    lightningAddressQrCode  = "Código QR de dirección Lightning",
-    lightningAddressLabel   = "Dirección Lightning",
-    shareLightningAddress   = "Compartir dirección Lightning",
-    lightningInvoiceQrCode  = "Código QR de factura Lightning",
-    invoiceLabel            = "Factura",
-    shareInvoice            = "Compartir factura",
-
-    // ── ReceiveScreen — amount step ───────────────────────────────────────────
-    amountInSats          = "Cantidad (sats)",
-    satsRange             = { min, max -> "$min – $max sats" },
-
-    // ── ReceiveScreen — memo step ─────────────────────────────────────────────
-    memoOptional          = "Nota (opcional)",
-    memoPlaceholder       = "¿Para qué es esto?",
-    creatingInvoice       = "Creando factura…",
-    createInvoice         = "Crear factura",
-
-    // ── ReceiveScreen — invoice ready ─────────────────────────────────────────
-    waiting               = "Esperando…",
-    invoiceExpired        = "Factura expirada",
-    newInvoice            = "Nueva factura",
-
-    // ── ReceiveScreen — lnurl withdraw ────────────────────────────────────────
-    withdrawFrom          = "Retirar de",
-    minimumSats           = { min -> "Mínimo es $min sats" },
-    maximumSats           = { max -> "Máximo es $max sats" },
-    withdrawButton        = "Retirar",
-    withdrawButtonAmount  = { amount -> "Retirar $amount sats" },
-
-    // ── ReceiveScreen — success ───────────────────────────────────────────────
-    paymentReceived       = "¡Pago recibido!",
-
-    // ── AmountDisplay ─────────────────────────────────────────────────────────
-    amountDisplaySats = { amount -> "$amount ${if (amount == 1L) "sat" else "sats"}" },
-
-    // ── BrightnessToggleButton & QrDisplayCard ────────────────────────────────
-    brightnessReduce  = "Reducir brillo",
-    brightnessBoost   = "Aumentar brillo",
-    qrShare           = "Compartir",
-    qrCopy            = "Copiar",
-    qrNfcStop         = "Detener NFC",
-    qrNfcStart        = "Compartir por NFC",
-
-    // ── ReceiveViewModel ──────────────────────────────────────────────────────
-    receiveVmFailedToCreateInvoice = "No se pudo crear la factura",
-    receiveVmWithdrawRejected      = "El servicio de retiro rechazó la factura",
-    receiveVmWithdrawFailed        = "Error al retirar",
+    today                 = "hoy",
+    yesterday             = "ayer",
 
     // ── SendScreen — general ──────────────────────────────────────────────────
     send                  = "Enviar",
@@ -195,119 +142,6 @@ val EsHomeStrings = AppStrings(
     sendVmUnsupportedType            = { tag -> "Tipo no compatible: $tag" },
     sendVmPaymentFailedRescan        = "Pago fallido — no se pudo volver a obtener la dirección",
 
-// ── HistoryScreen ─────────────────────────────────────────────────────────
-    historyTitle              = "Historial",
-    historyClose              = "Cerrar",
-    historySearchPayments     = "Buscar pagos",
-    historyFilterPayments     = "Filtrar pagos",
-    historyRetry              = "Reintentar",
-    historyNoPayments         = "Aún no hay pagos.",
-    historySearchPlaceholder  = "Buscar transacciones",
-    historySearchHelp         = "Ayuda de búsqueda",
-    historySearchPaste        = "Pegar",
-    historySearchClear        = "Limpiar búsqueda",
-    historySearchChip         = { tail -> "búsqueda: …$tail" },
-    historyClearSearch        = "Limpiar búsqueda",
-    filterDirectionOutgoing   = "Salientes",
-    filterDirectionIncoming   = "Entrantes",
-    filterClearDirection      = "Quitar filtro de dirección",
-    filterStatusCompleted     = "Completado",
-    filterStatusPending       = "Pendiente",
-    filterStatusFailed        = "Fallido",
-    filterRemoveStatus        = "Quitar filtro de estado",
-    filterRemoveType          = "Quitar filtro de tipo",
-    filterAmountRange         = { min, max -> "$min–$max sats" },
-    filterAmountMin           = { min -> "≥ $min sats" },
-    filterAmountMax           = { max -> "≤ $max sats" },
-    filterClearAmount         = "Quitar filtro de cantidad",
-    filterDateThisWeek        = "Esta semana",
-    filterDateThisMonth       = "Este mes",
-    filterDateThisYear        = "Este año",
-    filterDateRange           = { from, to -> "$from–$to" },
-    filterDateFrom            = { from -> "Desde $from" },
-    filterDateUntil           = { until -> "Hasta $until" },
-    filterClearDate           = "Quitar filtro de fecha",
-
-    // ── FilterBottomSheet ─────────────────────────────────────────────────────
-    filterSheetTitle          = "Filtrar pagos",
-    filterSectionDirection    = "Dirección",
-    filterDirectionAll        = "Todos",
-    filterSectionStatus       = "Estado",
-    filterSectionType         = "Tipo",
-    filterSectionAmount       = "Cantidad (sats)",
-    filterAmountMin_label     = "Mín.",
-    filterAmountMax_label     = "Máx.",
-    filterAmountSuffix        = "sats",
-    filterSectionDate         = "Fecha",
-    filterDateFrom_label      = "Desde",
-    filterDateTo_label        = "Hasta",
-    filterDialogOk            = "Aceptar",
-    filterDialogCancel        = "Cancelar",
-
-    // ── SearchInfoSheet ───────────────────────────────────────────────────────
-    searchInfoTitle           = "¿Qué puedo buscar?",
-    searchInfoSubtitle        = "Escribe cualquier parte de lo siguiente para encontrar un pago:",
-    searchInfoMemoTitle       = "Nota",
-    searchInfoMemoDesc        = "El mensaje o descripción adjunto a un pago. " +
-            "Por ejemplo, \"café\" o \"alquiler marzo\".",
-    searchInfoInvoiceTitle    = "Factura",
-    searchInfoInvoiceDesc     = "La solicitud de pago que escaneaste o pegaste para enviar un pago. " +
-            "Normalmente empieza por \"lnbc…\". " +
-            "Puedes pegar solo los primeros o últimos caracteres.",
-    searchInfoHashTitle       = "Hash",
-    searchInfoHashDesc        = "Un código único que identifica este pago en la " +
-            "red Lightning. Útil si alguien te pide que " +
-            "confirmes una transacción específica.",
-    searchInfoPreimageTitle   = "Preimagen",
-    searchInfoPreimageDesc    = "Un código secreto que demuestra que se recibió un pago. " +
-            "Solo disponible después de que un pago se complete correctamente.",
-    searchInfoNodeAliasTitle  = "Alias del nodo",
-    searchInfoNodeAliasDesc   = "El nombre del nodo Lightning al que enviaste un pago. " +
-            "Por ejemplo, \"ACINQ\" o \"Wallet of Satoshi\". " +
-            "Los alias se resuelven automáticamente para pagos salientes.",
-    searchInfoNodeIdTitle     = "ID del nodo (clave pública)",
-    searchInfoNodeIdDesc      = "La clave pública del nodo de destino. " +
-            "Una cadena hexadecimal de 66 caracteres — puedes pegar solo los primeros.",
-    searchInfoFooter          = "Puedes pegar un valor completo o buscar con solo unos pocos caracteres — " +
-            "las coincidencias parciales también funcionan.",
-
-    // ── PaymentDetailScreen ───────────────────────────────────────────────────
-    statusSuccess = "Completado",
-    statusPending = "Pendiente",
-    statusFailed  = "Fallido",
-    statusUnknown = "Desconocido",
-    detailOutgoingTitle        = "Pago saliente",
-    detailIncomingTitle        = "Pago entrante",
-    detailBack                 = "Atrás",
-    detailCouldNotLoad         = "No se pudieron cargar los detalles completos",
-    detailFeeLabel             = { feeSat, fiatPart, ppmPart ->
-        "Comisión: $feeSat sats$fiatPart$ppmPart"
-    },
-    detailSectionDetails       = "Detalles",
-    detailRowDate              = "Fecha",
-    detailRowMemo              = "Nota",
-    detailRowMemoEmpty         = "—",
-    detailRowType              = "Tipo",
-    detailRowComment           = "Comentario",
-    detailSectionSuccessAction = "Acción de éxito",
-    detailSuccessMessage       = "Mensaje",
-    detailSuccessUrl           = "URL",
-    detailSuccessDescription   = "Descripción",
-    detailSectionTechnical     = "Técnico",
-    detailRowPaymentHash       = "Hash",
-    detailRowPreimage          = "Preimagen",
-    detailRowDestination       = "Destino",
-    detailCopyNodeId           = "Copiar ID del nodo",
-    detailRowBolt11            = "BOLT11",
-
-    // ── PaymentRow ────────────────────────────────────────────────────────────
-    paymentRowSentCD      = "Enviado",
-    paymentRowReceivedCD  = "Recibido",
-    paymentRowNoMemo      = "Sin nota",
-    paymentRowPending     = "Pendiente",
-    paymentRowFailed      = "Fallido",
-
-
     onboarding = OnboardingStrings(
         back                    = "Atrás",
         next                    = "Siguiente",
@@ -325,6 +159,7 @@ val EsHomeStrings = AppStrings(
         hideAdminKey            = "Ocultar",
         showAdminKey            = "Mostrar",
         fieldsRequired          = "Todos los campos son obligatorios.",
+        invalidKeyFormat        = "Formato de clave no válido",
         connect                 = "Conectar",
         notificationsTitle      = "Mantente al día",
         notificationsSubtitle   = "Recibe notificaciones al instante cuando recibas un pago.",
@@ -352,5 +187,300 @@ val EsHomeStrings = AppStrings(
         scheduleSync     = "Programar sincronización",
         schedule         = "Programar",
         cancel           = "Cancelar"
-    )
+    ),
+
+    receive = ReceiveStrings(
+        // ── ReceiveScreen — general ───────────────────────────────────────────────
+        receive               = "Recibir",
+
+        // ── ReceiveScreen — error ─────────────────────────────────────────────────
+        receiveError          = "Error",
+
+        // ── ReceiveScreen — QR / share ────────────────────────────────────────────
+        lightningAddressQrCode  = "Código QR de dirección Lightning",
+        lightningAddressLabel   = "Dirección Lightning",
+        shareLightningAddress   = "Compartir dirección Lightning",
+        lightningInvoiceQrCode  = "Código QR de factura Lightning",
+        invoiceLabel            = "Factura",
+        shareInvoice            = "Compartir factura",
+
+        // ── ReceiveScreen — amount step ───────────────────────────────────────────
+        amountInSats          = "Cantidad (sats)",
+        satsRange             = { min, max -> "$min – $max sats" },
+
+        // ── ReceiveScreen — memo step ─────────────────────────────────────────────
+        memoOptional          = "Nota (opcional)",
+        memoPlaceholder       = "¿Para qué es esto?",
+        creatingInvoice       = "Creando factura…",
+        createInvoice         = "Crear factura",
+
+        // ── ReceiveScreen — invoice ready ─────────────────────────────────────────
+        waiting               = "Esperando…",
+        invoiceExpired        = "Factura expirada",
+        newInvoice            = "Nueva factura",
+
+        // ── ReceiveScreen — lnurl withdraw ────────────────────────────────────────
+        withdrawFrom          = "Retirar de",
+        minimumSats           = { min -> "Mínimo es $min sats" },
+        maximumSats           = { max -> "Máximo es $max sats" },
+        withdrawButton        = "Retirar",
+        withdrawButtonAmount  = { amount -> "Retirar $amount sats" },
+
+        // ── ReceiveScreen — success ───────────────────────────────────────────────
+        paymentReceived       = "¡Pago recibido!",
+
+        // ── AmountDisplay ─────────────────────────────────────────────────────────
+        amountDisplaySats = { amount -> "$amount ${if (amount == 1L) "sat" else "sats"}" },
+
+        // ── BrightnessToggleButton & QrDisplayCard ────────────────────────────────
+        brightnessReduce  = "Reducir brillo",
+        brightnessBoost   = "Aumentar brillo",
+        qrShare           = "Compartir",
+        qrCopy            = "Copiar",
+        qrNfcStop         = "Detener NFC",
+        qrNfcStart        = "Compartir por NFC",
+        openInApp         = "Abrir en app",
+        noAppFound        = "No hay aplicación compatible",
+
+        // ── ReceiveViewModel ──────────────────────────────────────────────────────
+        receiveVmFailedToCreateInvoice = "No se pudo crear la factura",
+        receiveVmWithdrawRejected      = "El servicio de retiro rechazó la factura",
+        receiveVmWithdrawFailed        = "Error al retirar",
+    ),
+
+    history = HistoryStrings(
+        // ── HistoryScreen ─────────────────────────────────────────────────────────
+        historyTitle              = "Historial",
+        historyClose              = "Cerrar",
+        historySearchPayments     = "Buscar pagos",
+        historyFilterPayments     = "Filtrar pagos",
+        historyRetry              = "Reintentar",
+        historyNoPayments         = "Aún no hay pagos.",
+        historySearchPlaceholder  = "Buscar transacciones",
+        historySearchHelp         = "Ayuda de búsqueda",
+        historySearchPaste        = "Pegar",
+        historySearchClear        = "Limpiar búsqueda",
+        historySearchChip         = { tail -> "búsqueda: …$tail" },
+        historyClearSearch        = "Limpiar búsqueda",
+        filterDirectionOutgoing   = "Salientes",
+        filterDirectionIncoming   = "Entrantes",
+        filterClearDirection      = "Quitar filtro de dirección",
+        filterStatusCompleted     = "Completado",
+        filterStatusPending       = "Pendiente",
+        filterStatusFailed        = "Fallido",
+        filterRemoveStatus        = "Quitar filtro de estado",
+        filterRemoveType          = "Quitar filtro de tipo",
+        filterAmountRange         = { min, max -> "$min–$max sats" },
+        filterAmountMin           = { min -> "≥ $min sats" },
+        filterAmountMax           = { max -> "≤ $max sats" },
+        filterClearAmount         = "Quitar filtro de cantidad",
+        filterDateThisWeek        = "Esta semana",
+        filterDateThisMonth       = "Este mes",
+        filterDateThisYear        = "Este año",
+        filterDateRange           = { from, to -> "$from–$to" },
+        filterDateFrom            = { from -> "Desde $from" },
+        filterDateUntil           = { until -> "Hasta $until" },
+        filterClearDate           = "Quitar filtro de fecha",
+
+        // ── FilterBottomSheet ─────────────────────────────────────────────────────
+        filterSheetTitle          = "Filtrar pagos",
+        filterSectionDirection    = "Dirección",
+        filterDirectionAll        = "Todos",
+        filterSectionStatus       = "Estado",
+        filterSectionType         = "Tipo",
+        filterSectionAmount       = "Cantidad (sats)",
+        filterAmountMin_label     = "Mín.",
+        filterAmountMax_label     = "Máx.",
+        filterAmountSuffix        = "sats",
+        filterSectionDate         = "Fecha",
+        filterDateFrom_label      = "Desde",
+        filterDateTo_label        = "Hasta",
+        filterDialogOk            = "Aceptar",
+        filterDialogCancel        = "Cancelar",
+
+        // ── SearchInfoSheet ───────────────────────────────────────────────────────
+        searchInfoTitle           = "¿Qué puedo buscar?",
+        searchInfoSubtitle        = "Escribe cualquier parte de lo siguiente para encontrar un pago:",
+        searchInfoMemoTitle       = "Nota",
+        searchInfoMemoDesc        = "El mensaje o descripción adjunto a un pago. " +
+                "Por ejemplo, \"café\" o \"alquiler marzo\".",
+        searchInfoInvoiceTitle    = "Factura",
+        searchInfoInvoiceDesc     = "La solicitud de pago que escaneaste o pegaste para enviar un pago. " +
+                "Normalmente empieza por \"lnbc…\". " +
+                "Puedes pegar solo los primeros o últimos caracteres.",
+        searchInfoHashTitle       = "Hash",
+        searchInfoHashDesc        = "Un código único que identifica este pago en la " +
+                "red Lightning. Útil si alguien te pide que " +
+                "confirmes una transacción específica.",
+        searchInfoPreimageTitle   = "Preimagen",
+        searchInfoPreimageDesc    = "Un código secreto que demuestra que se recibió un pago. " +
+                "Solo disponible después de que un pago se complete correctamente.",
+        searchInfoNodeAliasTitle  = "Alias del nodo",
+        searchInfoNodeAliasDesc   = "El nombre del nodo Lightning al que enviaste un pago. " +
+                "Por ejemplo, \"ACINQ\" o \"Wallet of Satoshi\". " +
+                "Los alias se resuelven automáticamente para pagos salientes.",
+        searchInfoNodeIdTitle     = "ID del nodo (clave pública)",
+        searchInfoNodeIdDesc      = "La clave pública del nodo de destino. " +
+                "Una cadena hexadecimal de 66 caracteres — puedes pegar solo los primeros.",
+        searchInfoFooter          = "Puedes pegar un valor completo o buscar con solo unos pocos caracteres — " +
+                "las coincidencias parciales también funcionan.",
+
+        // ── PaymentDetailScreen ───────────────────────────────────────────────────
+        statusSuccess = "Completado",
+        statusPending = "Pendiente",
+        statusFailed  = "Fallido",
+        statusUnknown = "Desconocido",
+        detailOutgoingTitle        = "Pago saliente",
+        detailIncomingTitle        = "Pago entrante",
+        detailBack                 = "Atrás",
+        detailCouldNotLoad         = "No se pudieron cargar los detalles completos",
+        detailFeeLabel             = { feeSat, fiatPart, ppmPart ->
+            "Comisión: $feeSat sats$fiatPart$ppmPart"
+        },
+        detailSectionDetails       = "Detalles",
+        detailRowDate              = "Fecha",
+        detailRowMemo              = "Nota",
+        detailRowMemoEmpty         = "—",
+        detailRowType              = "Tipo",
+        detailRowComment           = "Comentario",
+        detailSectionSuccessAction = "Acción de éxito",
+        detailSuccessMessage       = "Mensaje",
+        detailSuccessUrl           = "URL",
+        detailSuccessDescription   = "Descripción",
+        detailSectionTechnical     = "Técnico",
+        detailRowPaymentHash       = "Hash",
+        detailRowPreimage          = "Preimagen",
+        detailRowDestination       = "Destino",
+        detailCopyNodeId           = "Copiar ID del nodo",
+        detailRowBolt11            = "BOLT11",
+
+        // ── PaymentRow ────────────────────────────────────────────────────────────
+        paymentRowSentCD      = "Enviado",
+        paymentRowReceivedCD  = "Recibido",
+        paymentRowNoMemo      = "Sin nota",
+        paymentRowPending     = "Pendiente",
+        paymentRowFailed      = "Fallido",
+    ),
+
+    nwc = NwcStrings(
+        // ── Shared ────────────────────────────────────────────────────────────────
+        back     = "Atrás",
+        next     = "Siguiente",
+        done     = "Listo",
+        cancel   = "Cancelar",
+        schedule = "Programar",
+
+        // ── Connection detail ─────────────────────────────────────────────────────
+        connectionDetailTitle       = "Conexión",
+        connectionUnknownWallet     = "App desconocida",
+        connectionSectionDetails    = "Detalles",
+        connectionRowCreated        = "Conectado",
+        connectionRowLastUsed       = "Último uso",
+        connectionRowExpires        = "Vence",
+        connectionRowPubkey         = "Clave pública",
+        connectionNeverUsed         = "Nunca",
+        lastUsedToday     = "Usada hoy",
+        lastUsedYesterday = "Usada ayer",
+        lastUsedDate      = "Usada %s",
+        connectionNoExpiry          = "Sin vencimiento",
+        connectionExpired           = { date -> "Vencido · $date" },
+        connectionSectionPermissions = "Permisos",
+        connectionSectionBudgets    = "Presupuestos de gasto",
+        connectionBudgetTitle       = { window -> "Presupuesto $window" },
+        connectionBudgetUsed        = { sats -> "Usado: $sats sats" },
+        connectionBudgetTotal       = { sats -> "de $sats sats" },
+        connectionRevoke            = "Revocar conexión",
+        connectionStatusActive      = "Activa",
+        connectionStatusExpired     = "Vencida",
+
+        // ── NWC permissions ───────────────────────────────────────────────────────
+        permPayInvoice              = "Pagar facturas",
+        permGetBalance              = "Ver saldo",
+        permGetInfo                 = "Ver información del monedero",
+        permMakeInvoice             = "Crear facturas",
+        permLookupInvoice           = "Consultar facturas",
+        permListTransactions        = "Ver historial de transacciones",
+        permSignMessage             = "Firmar mensajes",
+        permPay           = "Enviar pagos",
+        permInvoice       = "Crear facturas",
+        permLookup  = "Consultar estado de facturas",
+        permHistory = "Leer historial de transacciones",
+        permBalance = "Leer saldo del monedero",
+        permInfo    = "Leer información de cuenta",
+        permLookupHistory = "Consultar estado e historial de transacciones",
+        permBalanceInfo   = "Ver saldo e información de cuenta",
+        permSendPayments           = "Enviar pagos",
+        permCreateInvoices         = "Crear facturas",
+        permLookupInvoiceStatus    = "Consultar estado de factura",
+        permReadTransactionHistory = "Leer historial de transacciones",
+        permReadWalletBalance      = "Leer saldo del monedero",
+        permReadAccountInfo        = "Leer información de cuenta",
+        revokeDialogTitle   = "¿Revocar conexión?",
+        revokeDialogBody    = "Esto revocará permanentemente esta clave Nostr Wallet Connect. Cualquier app que la use perderá el acceso.",
+        revokeDialogConfirm = "Revocar",
+        revokeDialogDismiss = "Cancelar",
+        refreshDaily   = "Diario",
+        refreshWeekly  = "Semanal",
+        refreshMonthly = "Mensual",
+        refreshYearly  = "Anual",
+        refreshNever   = "Nunca",
+
+        newConnection       = "Nueva conexión",
+        labelHint           = "Etiqueta (p.ej. Amethyst, Bitrefill)",
+        expires             = "Caduca",
+        pickDate            = "Elegir fecha",
+        pickTime            = "Elegir hora",
+        never               = "Nunca",
+        budgets             = "Presupuestos",
+        addBudget           = "Añadir presupuesto",
+        removeBudget        = "Eliminar presupuesto",
+        permissions         = "Permisos",
+        unnamed             = "Sin nombre",
+        creating            = "Creando…",
+        createConnection    = "Crear conexión",
+        ok                  = "OK",
+        sats                = "Sats",
+        resets              = "Se reinicia",
+
+        deleteConnection     = "Eliminar conexión",
+        unnamedConnection    = "Conexión sin nombre",
+        neverUsed            = "Nunca usada",
+        expired              = "Caducada",
+
+        connectionCreated         = "Conexión creada",
+        scanOrCopyHint            = "Escanea o copia esta cadena de conexión en tu app. No se volverá a mostrar.",
+        nwcPairingQrCode          = "Código QR de emparejamiento NWC",
+        nwcConnectionString       = "Cadena de conexión NWC",
+        shareNwcConnectionString  = "Compartir cadena de conexión NWC",
+        openInApp                 = "Abrir en app",
+
+        walletConnect          = "Wallet Connect",
+        addConnection          = "Añadir conexión",
+        noCompatibleAppFound   = "No se encontró una app compatible",
+        removeConnection       = "¿Eliminar conexión?",
+        removeConnectionDetail = "Esto revocará permanentemente esta clave de Nostr Wallet Connect. Cualquier app que la use perderá el acceso.",
+        remove                 = "Eliminar",
+
+        noConnectionsYet    = "Aún no hay conexiones",
+        tapToAddHint        = "Toca + para conectar una app vía Nostr Wallet Connect.",
+        somethingWentWrong  = "Algo salió mal",
+        retry               = "Reintentar",
+
+        failedToLoadConnections  = "Error al cargar las conexiones",
+        failedToCreateConnection = "Error al crear la conexión",
+        failedToDeleteConnection = "Error al eliminar la conexión",
+        failedToLoadConnection   = "Error al cargar la conexión",
+        ),
+    lock = LockStrings(
+        appLockTitle             = "Bloqueo de App",
+        appLockDescription       = "Solicitar autenticación biométrica (huella, cara o PIN) cada vez que se abra Gudari Wallet.",
+        appLockToggleLabel       = "Bloquear al abrir",
+        appLockToggleEnabled     = "Activado (recomendado)",
+        appLockToggleDisabled    = "Desactivado",
+        appName                  = "Gudari Wallet",
+        authenticateToContinue   = "Autentícate para continuar",
+        unlockButton             = "Desbloquear",
+        biometricPromptTitle     = "Desbloquear Gudari Wallet",
+        biometricPromptSubtitle  = "Autentícate para acceder a tu cartera",
+    ),
 )

app/src/main/java/com/bitcointxoko/gudariwallet/i18n/EuStrings.kt

@@ -54,61 +54,8 @@ val EuStrings = AppStrings(
     details               = "Xehetasunak",
     enterValidAmount      = "Sartu zenbateko baliogarri bat",
     satsUnit              = { sats -> "$sats sat" },
-
-    // ── ReceiveScreen — general ───────────────────────────────────────────────
-    receive               = "Jaso",
-
-    // ── ReceiveScreen — error ─────────────────────────────────────────────────
-    receiveError          = "Errorea",
-
-    // ── ReceiveScreen — QR / share ────────────────────────────────────────────
-    lightningAddressQrCode  = "Lightning helbidearen QR kodea",
-    lightningAddressLabel   = "Lightning helbidea",
-    shareLightningAddress   = "Partekatu Lightning helbidea",
-    lightningInvoiceQrCode  = "Lightning fakturaren QR kodea",
-    invoiceLabel            = "Faktura",
-    shareInvoice            = "Partekatu faktura",
-
-    // ── ReceiveScreen — amount step ───────────────────────────────────────────
-    amountInSats          = "Zenbatekoa (sat)",
-    satsRange             = { min, max -> "$min – $max sat" },
-
-    // ── ReceiveScreen — memo step ─────────────────────────────────────────────
-    memoOptional          = "Oharra (aukerakoa)",
-    memoPlaceholder       = "Zertarako da hau?",
-    creatingInvoice       = "Faktura sortzen…",
-    createInvoice         = "Sortu faktura",
-
-    // ── ReceiveScreen — invoice ready ─────────────────────────────────────────
-    waiting               = "Zain…",
-    invoiceExpired        = "Faktura iraungita",
-    newInvoice            = "Faktura berria",
-
-    // ── ReceiveScreen — lnurl withdraw ────────────────────────────────────────
-    withdrawFrom          = "Atera hemendik:",
-    minimumSats           = { min -> "Gutxienekoa $min sat da" },
-    maximumSats           = { max -> "Gehienekoa $max sat da" },
-    withdrawButton        = "Atera",
-    withdrawButtonAmount  = { amount -> "Atera $amount sat" },
-
-    // ── ReceiveScreen — success ───────────────────────────────────────────────
-    paymentReceived       = "Ordainketa jasota!",
-
-    // ── AmountDisplay ─────────────────────────────────────────────────────────
-    amountDisplaySats = { amount -> "$amount sat" },
-
-    // ── BrightnessToggleButton & QrDisplayCard ────────────────────────────────
-    brightnessReduce  = "Murriztu distira",
-    brightnessBoost   = "Handitu distira",
-    qrShare           = "Partekatu",
-    qrCopy            = "Kopiatu",
-    qrNfcStop         = "Gelditu NFC partekatzea",
-    qrNfcStart        = "Partekatu NFC bidez",
-
-    // ── ReceiveViewModel ──────────────────────────────────────────────────────
-    receiveVmFailedToCreateInvoice = "Ezin izan da faktura sortu",
-    receiveVmWithdrawRejected      = "Ateratzeko zerbitzuak faktura baztertu du",
-    receiveVmWithdrawFailed        = "Ateratzeak huts egin du",
+    today                 = "gaur",
+    yesterday             = "atzo",
 
     // ── SendScreen — general ──────────────────────────────────────────────────
     send                  = "Bidali",
@@ -196,118 +143,6 @@ val EuStrings = AppStrings(
     sendVmUnsupportedType            = { tag -> "Mota onartzen ez dena: $tag" },
     sendVmPaymentFailedRescan        = "Ordainketak huts egin du — ezin izan da helbidea berriro eskuratu",
 
-    // ── HistoryScreen ─────────────────────────────────────────────────────────
-    historyTitle              = "Historia",
-    historyClose              = "Itxi",
-    historySearchPayments     = "Bilatu ordainketak",
-    historyFilterPayments     = "Iragazi ordainketak",
-    historyRetry              = "Saiatu berriro",
-    historyNoPayments         = "Oraindik ez dago ordainketarik.",
-    historySearchPlaceholder  = "Bilatu transakzioak",
-    historySearchHelp         = "Bilaketa-laguntza",
-    historySearchPaste        = "Itsatsi",
-    historySearchClear        = "Garbitu bilaketa",
-    historySearchChip         = { tail -> "bilaketa: …$tail" },
-    historyClearSearch        = "Garbitu bilaketa",
-    filterDirectionOutgoing   = "Irteerako",
-    filterDirectionIncoming   = "Sarrerako",
-    filterClearDirection      = "Garbitu norabide-iragazkia",
-    filterStatusCompleted     = "Osatuta",
-    filterStatusPending       = "Zain",
-    filterStatusFailed        = "Huts eginda",
-    filterRemoveStatus        = "Kendu egoera-iragazkia",
-    filterRemoveType          = "Kendu mota-iragazkia",
-    filterAmountRange         = { min, max -> "$min–$max sat" },
-    filterAmountMin           = { min -> "≥ $min sat" },
-    filterAmountMax           = { max -> "≤ $max sat" },
-    filterClearAmount         = "Garbitu zenbateko-iragazkia",
-    filterDateThisWeek        = "Aste honetan",
-    filterDateThisMonth       = "Hilabete honetan",
-    filterDateThisYear        = "Urte honetan",
-    filterDateRange           = { from, to -> "$from–$to" },
-    filterDateFrom            = { from -> "$from-tik" },
-    filterDateUntil           = { until -> "$until arte" },
-    filterClearDate           = "Garbitu data-iragazkia",
-
-    // ── FilterBottomSheet ─────────────────────────────────────────────────────
-    filterSheetTitle          = "Iragazi ordainketak",
-    filterSectionDirection    = "Norabidea",
-    filterDirectionAll        = "Guztiak",
-    filterSectionStatus       = "Egoera",
-    filterSectionType         = "Mota",
-    filterSectionAmount       = "Zenbatekoa (sat)",
-    filterAmountMin_label     = "Gutxienekoa",
-    filterAmountMax_label     = "Gehienekoa",
-    filterAmountSuffix        = "sat",
-    filterSectionDate         = "Data",
-    filterDateFrom_label      = "Nondik",
-    filterDateTo_label        = "Nora arte",
-    filterDialogOk            = "Ados",
-    filterDialogCancel        = "Utzi",
-
-    // ── SearchInfoSheet ───────────────────────────────────────────────────────
-    searchInfoTitle           = "Zer bila dezaket?",
-    searchInfoSubtitle        = "Idatzi hurrengoetako edozein zati ordainketa bat aurkitzeko:",
-    searchInfoMemoTitle       = "Oharra",
-    searchInfoMemoDesc        = "Ordainketa bati erantsitako mezua edo deskribapena. " +
-            "Adibidez, \"kafea\" edo \"martxoko alokairua\".",
-    searchInfoInvoiceTitle    = "Faktura",
-    searchInfoInvoiceDesc     = "Ordainketa bat bidaltzeko eskaneatu edo itsatsi zenuen ordainketa-eskaera. " +
-            "Normalean \"lnbc…\" hasierarekin dator. " +
-            "Lehen edo azken karaktere batzuk bakarrik itsats ditzakezu.",
-    searchInfoHashTitle       = "Hash",
-    searchInfoHashDesc        = "Ordainketa hau Lightning Sarean identifikatzen duen kode bakarra. " +
-            "Erabilgarria norbaitek transakzio zehatz bat berresteko eskatzen dizunean.",
-    searchInfoPreimageTitle   = "Aurre-irudia",
-    searchInfoPreimageDesc    = "Ordainketa bat jaso dela frogatzen duen kode sekretua. " +
-            "Ordainketa arrakastaz osatu ondoren bakarrik dago erabilgarri.",
-    searchInfoNodeAliasTitle  = "Nodo-izengoitia",
-    searchInfoNodeAliasDesc   = "Ordainketa bidali zenion Lightning nodoaren izena. " +
-            "Adibidez, \"ACINQ\" edo \"Wallet of Satoshi\". " +
-            "Izengoitiak automatikoki ebazten dira irteerako ordainketetan.",
-    searchInfoNodeIdTitle     = "Nodo IDa (gako publikoa)",
-    searchInfoNodeIdDesc      = "Helmuga-nodoaren gako publikoa. " +
-            "66 karaktereko hex katea — lehen karaktere batzuk bakarrik itsats ditzakezu.",
-    searchInfoFooter          = "Balio osoa itsatsi dezakezu edo karaktere gutxi batzuekin bilatu — " +
-            "zati-bat datozenak ere funtzionatzen dute.",
-
-    // ── PaymentDetailScreen ───────────────────────────────────────────────────
-    statusSuccess = "Osatuta",
-    statusPending = "Zain",
-    statusFailed  = "Huts eginda",
-    statusUnknown = "Ezezaguna",
-    detailOutgoingTitle        = "Irteerako ordainketa",
-    detailIncomingTitle        = "Sarrerako ordainketa",
-    detailBack                 = "Atzera",
-    detailCouldNotLoad         = "Ezin izan dira xehetasun osoak kargatu",
-    detailFeeLabel             = { feeSat, fiatPart, ppmPart ->
-        "Komisioa: $feeSat sat$fiatPart$ppmPart"
-    },
-    detailSectionDetails       = "Xehetasunak",
-    detailRowDate              = "Data",
-    detailRowMemo              = "Oharra",
-    detailRowMemoEmpty         = "—",
-    detailRowType              = "Mota",
-    detailRowComment           = "Iruzkina",
-    detailSectionSuccessAction = "Arrakasta-ekintza",
-    detailSuccessMessage       = "Mezua",
-    detailSuccessUrl           = "URLa",
-    detailSuccessDescription   = "Deskribapena",
-    detailSectionTechnical     = "Teknikoa",
-    detailRowPaymentHash       = "Hash",
-    detailRowPreimage          = "Aurre-irudia",
-    detailRowDestination       = "Helmuga",
-    detailCopyNodeId           = "Kopiatu nodo IDa",
-    detailRowBolt11            = "BOLT11",
-
-    // ── PaymentRow ────────────────────────────────────────────────────────────
-    paymentRowSentCD      = "Bidalita",
-    paymentRowReceivedCD  = "Jasota",
-    paymentRowNoMemo      = "Oharrik gabe",
-    paymentRowPending     = "Zain",
-    paymentRowFailed     = "Huts eginda",
-
-
     onboarding = OnboardingStrings(
         back                    = "Atzera",
         next                    = "Hurrengoa",
@@ -325,6 +160,7 @@ val EuStrings = AppStrings(
         hideAdminKey            = "Ezkutatu",
         showAdminKey            = "Erakutsi",
         fieldsRequired          = "Eremu guztiak beharrezkoak dira.",
+        invalidKeyFormat        = "Gako formatu baliogabea",
         connect                 = "Konektatu",
         notificationsTitle      = "Egon eguneratuta",
         notificationsSubtitle   = "Jaso jakinarazpenak berehala transakzio bat jasotzen duzunean.",
@@ -352,5 +188,299 @@ val EuStrings = AppStrings(
         scheduleSync     = "Programatu sinkronizazioa",
         schedule         = "Programatu",
         cancel           = "Utzi"
+    ),
+
+    receive = ReceiveStrings(
+        // ── ReceiveScreen — general ───────────────────────────────────────────────
+        receive               = "Jaso",
+
+        // ── ReceiveScreen — error ─────────────────────────────────────────────────
+        receiveError          = "Errorea",
+
+        // ── ReceiveScreen — QR / share ────────────────────────────────────────────
+        lightningAddressQrCode  = "Lightning helbidearen QR kodea",
+        lightningAddressLabel   = "Lightning helbidea",
+        shareLightningAddress   = "Partekatu Lightning helbidea",
+        lightningInvoiceQrCode  = "Lightning fakturaren QR kodea",
+        invoiceLabel            = "Faktura",
+        shareInvoice            = "Partekatu faktura",
+
+        // ── ReceiveScreen — amount step ───────────────────────────────────────────
+        amountInSats          = "Zenbatekoa (sat)",
+        satsRange             = { min, max -> "$min – $max sat" },
+
+        // ── ReceiveScreen — memo step ─────────────────────────────────────────────
+        memoOptional          = "Oharra (aukerakoa)",
+        memoPlaceholder       = "Zertarako da hau?",
+        creatingInvoice       = "Faktura sortzen…",
+        createInvoice         = "Sortu faktura",
+
+        // ── ReceiveScreen — invoice ready ─────────────────────────────────────────
+        waiting               = "Zain…",
+        invoiceExpired        = "Faktura iraungita",
+        newInvoice            = "Faktura berria",
+
+        // ── ReceiveScreen — lnurl withdraw ────────────────────────────────────────
+        withdrawFrom          = "Atera hemendik:",
+        minimumSats           = { min -> "Gutxienekoa $min sat da" },
+        maximumSats           = { max -> "Gehienekoa $max sat da" },
+        withdrawButton        = "Atera",
+        withdrawButtonAmount  = { amount -> "Atera $amount sat" },
+
+        // ── ReceiveScreen — success ───────────────────────────────────────────────
+        paymentReceived       = "Ordainketa jasota!",
+
+        // ── AmountDisplay ─────────────────────────────────────────────────────────
+        amountDisplaySats = { amount -> "$amount sat" },
+
+        // ── BrightnessToggleButton & QrDisplayCard ────────────────────────────────
+        brightnessReduce  = "Murriztu distira",
+        brightnessBoost   = "Handitu distira",
+        qrShare           = "Partekatu",
+        qrCopy            = "Kopiatu",
+        qrNfcStop         = "Gelditu NFC partekatzea",
+        qrNfcStart        = "Partekatu NFC bidez",
+        openInApp         = "Ireki aplikazioan",
+        noAppFound        = "Ez da aurkitu aplikazio bateragarririk",
+
+        // ── ReceiveViewModel ──────────────────────────────────────────────────────
+        receiveVmFailedToCreateInvoice = "Ezin izan da faktura sortu",
+        receiveVmWithdrawRejected      = "Ateratzeko zerbitzuak faktura baztertu du",
+        receiveVmWithdrawFailed        = "Ateratzeak huts egin du",
+    ),
+
+    history = HistoryStrings(
+        // ── HistoryScreen ─────────────────────────────────────────────────────────
+        historyTitle              = "Historia",
+        historyClose              = "Itxi",
+        historySearchPayments     = "Bilatu ordainketak",
+        historyFilterPayments     = "Iragazi ordainketak",
+        historyRetry              = "Saiatu berriro",
+        historyNoPayments         = "Oraindik ez dago ordainketarik.",
+        historySearchPlaceholder  = "Bilatu transakzioak",
+        historySearchHelp         = "Bilaketa-laguntza",
+        historySearchPaste        = "Itsatsi",
+        historySearchClear        = "Garbitu bilaketa",
+        historySearchChip         = { tail -> "bilaketa: …$tail" },
+        historyClearSearch        = "Garbitu bilaketa",
+        filterDirectionOutgoing   = "Irteerako",
+        filterDirectionIncoming   = "Sarrerako",
+        filterClearDirection      = "Garbitu norabide-iragazkia",
+        filterStatusCompleted     = "Osatuta",
+        filterStatusPending       = "Zain",
+        filterStatusFailed        = "Huts eginda",
+        filterRemoveStatus        = "Kendu egoera-iragazkia",
+        filterRemoveType          = "Kendu mota-iragazkia",
+        filterAmountRange         = { min, max -> "$min–$max sat" },
+        filterAmountMin           = { min -> "≥ $min sat" },
+        filterAmountMax           = { max -> "≤ $max sat" },
+        filterClearAmount         = "Garbitu zenbateko-iragazkia",
+        filterDateThisWeek        = "Aste honetan",
+        filterDateThisMonth       = "Hilabete honetan",
+        filterDateThisYear        = "Urte honetan",
+        filterDateRange           = { from, to -> "$from–$to" },
+        filterDateFrom            = { from -> "$from-tik" },
+        filterDateUntil           = { until -> "$until arte" },
+        filterClearDate           = "Garbitu data-iragazkia",
+
+        // ── FilterBottomSheet ─────────────────────────────────────────────────────
+        filterSheetTitle          = "Iragazi ordainketak",
+        filterSectionDirection    = "Norabidea",
+        filterDirectionAll        = "Guztiak",
+        filterSectionStatus       = "Egoera",
+        filterSectionType         = "Mota",
+        filterSectionAmount       = "Zenbatekoa (sat)",
+        filterAmountMin_label     = "Gutxienekoa",
+        filterAmountMax_label     = "Gehienekoa",
+        filterAmountSuffix        = "sat",
+        filterSectionDate         = "Data",
+        filterDateFrom_label      = "Nondik",
+        filterDateTo_label        = "Nora arte",
+        filterDialogOk            = "Ados",
+        filterDialogCancel        = "Utzi",
+
+        // ── SearchInfoSheet ───────────────────────────────────────────────────────
+        searchInfoTitle           = "Zer bila dezaket?",
+        searchInfoSubtitle        = "Idatzi hurrengoetako edozein zati ordainketa bat aurkitzeko:",
+        searchInfoMemoTitle       = "Oharra",
+        searchInfoMemoDesc        = "Ordainketa bati erantsitako mezua edo deskribapena. " +
+                "Adibidez, \"kafea\" edo \"martxoko alokairua\".",
+        searchInfoInvoiceTitle    = "Faktura",
+        searchInfoInvoiceDesc     = "Ordainketa bat bidaltzeko eskaneatu edo itsatsi zenuen ordainketa-eskaera. " +
+                "Normalean \"lnbc…\" hasierarekin dator. " +
+                "Lehen edo azken karaktere batzuk bakarrik itsats ditzakezu.",
+        searchInfoHashTitle       = "Hash",
+        searchInfoHashDesc        = "Ordainketa hau Lightning Sarean identifikatzen duen kode bakarra. " +
+                "Erabilgarria norbaitek transakzio zehatz bat berresteko eskatzen dizunean.",
+        searchInfoPreimageTitle   = "Aurre-irudia",
+        searchInfoPreimageDesc    = "Ordainketa bat jaso dela frogatzen duen kode sekretua. " +
+                "Ordainketa arrakastaz osatu ondoren bakarrik dago erabilgarri.",
+        searchInfoNodeAliasTitle  = "Nodo-izengoitia",
+        searchInfoNodeAliasDesc   = "Ordainketa bidali zenion Lightning nodoaren izena. " +
+                "Adibidez, \"ACINQ\" edo \"Wallet of Satoshi\". " +
+                "Izengoitiak automatikoki ebazten dira irteerako ordainketetan.",
+        searchInfoNodeIdTitle     = "Nodo IDa (gako publikoa)",
+        searchInfoNodeIdDesc      = "Helmuga-nodoaren gako publikoa. " +
+                "66 karaktereko hex katea — lehen karaktere batzuk bakarrik itsats ditzakezu.",
+        searchInfoFooter          = "Balio osoa itsatsi dezakezu edo karaktere gutxi batzuekin bilatu — " +
+                "zati-bat datozenak ere funtzionatzen dute.",
+
+        // ── PaymentDetailScreen ───────────────────────────────────────────────────
+        statusSuccess = "Osatuta",
+        statusPending = "Zain",
+        statusFailed  = "Huts eginda",
+        statusUnknown = "Ezezaguna",
+        detailOutgoingTitle        = "Irteerako ordainketa",
+        detailIncomingTitle        = "Sarrerako ordainketa",
+        detailBack                 = "Atzera",
+        detailCouldNotLoad         = "Ezin izan dira xehetasun osoak kargatu",
+        detailFeeLabel             = { feeSat, fiatPart, ppmPart ->
+            "Komisioa: $feeSat sat$fiatPart$ppmPart"
+        },
+        detailSectionDetails       = "Xehetasunak",
+        detailRowDate              = "Data",
+        detailRowMemo              = "Oharra",
+        detailRowMemoEmpty         = "—",
+        detailRowType              = "Mota",
+        detailRowComment           = "Iruzkina",
+        detailSectionSuccessAction = "Arrakasta-ekintza",
+        detailSuccessMessage       = "Mezua",
+        detailSuccessUrl           = "URLa",
+        detailSuccessDescription   = "Deskribapena",
+        detailSectionTechnical     = "Teknikoa",
+        detailRowPaymentHash       = "Hash",
+        detailRowPreimage          = "Aurre-irudia",
+        detailRowDestination       = "Helmuga",
+        detailCopyNodeId           = "Kopiatu nodo IDa",
+        detailRowBolt11            = "BOLT11",
+
+        // ── PaymentRow ────────────────────────────────────────────────────────────
+        paymentRowSentCD      = "Bidalita",
+        paymentRowReceivedCD  = "Jasota",
+        paymentRowNoMemo      = "Oharrik gabe",
+        paymentRowPending     = "Zain",
+        paymentRowFailed     = "Huts eginda",
+    ),
+
+    nwc = NwcStrings(
+        // ── Shared ────────────────────────────────────────────────────────────────
+        back     = "Atzera",
+        next     = "Hurrengoa",
+        done     = "Eginda",
+        cancel   = "Utzi",
+        schedule = "Programatu",
+
+        // ── Connection detail ─────────────────────────────────────────────────────
+        connectionDetailTitle       = "Konexioa",
+        connectionUnknownWallet     = "App ezezaguna",
+        connectionSectionDetails    = "Xehetasunak",
+        connectionRowCreated        = "Konektatuta",
+        connectionRowLastUsed       = "Azken erabilera",
+        lastUsedToday     = "Duela gutxi erabilia",    // "used recently" (idiomatic for today)
+        lastUsedYesterday = "Atzo erabilia",            // "used yesterday"
+        lastUsedDate      = "Duela %s erabilia",        // "used [date] ago"
+        connectionRowExpires        = "Iraungitze-data",
+        connectionRowPubkey         = "Gako publikoa",
+        connectionNeverUsed         = "Inoiz ez",
+        connectionNoExpiry          = "Iraungitze-datarik ez",
+        connectionExpired           = { date -> "Iraungita · $date" },
+        connectionSectionPermissions = "Baimenak",
+        connectionSectionBudgets    = "Gastu-aurrekontuak",
+        connectionBudgetTitle       = { window -> "$window aurrekontua" },
+        connectionBudgetUsed        = { sats -> "Erabilita: $sats sat" },
+        connectionBudgetTotal       = { sats -> "$sats satetatik" },
+        connectionRevoke            = "Konexioa baliogabetu",
+        connectionStatusActive      = "Aktibo",
+        connectionStatusExpired     = "Iraungita",
+
+        // ── NWC permissions ───────────────────────────────────────────────────────
+        permPayInvoice              = "Fakturak ordaindu",
+        permGetBalance              = "Saldoa ikusi",
+        permGetInfo                 = "Zorroko informazioa ikusi",
+        permMakeInvoice             = "Fakturak sortu",
+        permLookupInvoice           = "Fakturak kontsultatu",
+        permListTransactions        = "Transakzio-historia ikusi",
+        permSignMessage             = "Mezuak sinatu",
+        permPay           = "Ordainketak bidali",
+        permInvoice       = "Fakturak sortu",
+        permLookup  = "Kontsultatu faktura-egoera",
+        permHistory = "Irakurri transakzio-historiala",
+        permBalance = "Irakurri zorroaren saldoa",
+        permInfo    = "Irakurri kontu-informazioa",
+        permLookupHistory = "Egoera eta transakzio-historia kontsultatu",
+        permBalanceInfo   = "Saldoa eta kontuaren informazioa ikusi",
+        permSendPayments           = "Ordainketak bidali",
+        permCreateInvoices         = "Fakturak sortu",
+        permLookupInvoiceStatus    = "Fakturaren egoera kontsultatu",
+        permReadTransactionHistory = "Transakzio-historia irakurri",
+        permReadWalletBalance      = "Zorroko saldoa irakurri",
+        permReadAccountInfo        = "Kontuaren informazioa irakurri",
+        revokeDialogTitle   = "Konexioa baliogabetu?",
+        revokeDialogBody    = "Honek Nostr Wallet Connect gako hau behin betiko baliogabetuko du. Erabiltzen duen edozein aplikaziok sarbidea galduko du.",
+        revokeDialogConfirm = "Baliogabetu",
+        revokeDialogDismiss = "Utzi",
+        refreshDaily   = "Egunero",
+        refreshWeekly  = "Astero",
+        refreshMonthly = "Hilabetero",
+        refreshYearly  = "Urtero",
+        refreshNever   = "Inoiz ez",
+
+        newConnection       = "Konexio berria",
+        labelHint           = "Etiketa (adb. Amethyst, Bitrefill)",
+        expires             = "Iraungitzen da",
+        pickDate            = "Aukeratu data",
+        pickTime            = "Aukeratu ordua",
+        never               = "Inoiz ez",
+        budgets             = "Aurrekontuak",
+        addBudget           = "Gehitu aurrekontua",
+        removeBudget        = "Kendu aurrekontua",
+        permissions         = "Baimenak",
+        unnamed             = "Izengabea",
+        creating            = "Sortzen…",
+        createConnection    = "Sortu konexioa",
+        ok                  = "Ados",
+        sats                = "Sats",
+        resets              = "Berrezarri",
+
+        deleteConnection     = "Ezabatu konexioa",
+        unnamedConnection    = "Izengabeko konexioa",
+        neverUsed            = "Inoiz erabili gabea",
+        expired              = "Iraungitua",
+
+        connectionCreated         = "Konexioa sortuta",
+        scanOrCopyHint            = "Eskaneatu edo kopiatu konexio-kate hau zure app-ean. Ez da berriro erakutsiko.",
+        nwcPairingQrCode          = "NWC parekatzeko QR kodea",
+        nwcConnectionString       = "NWC konexio-katea",
+        shareNwcConnectionString  = "Partekatu NWC konexio-katea",
+        openInApp                 = "Ireki app-ean",
+
+        walletConnect          = "Wallet Connect",
+        addConnection          = "Gehitu konexioa",
+        noCompatibleAppFound   = "Ez da app bateragarririk aurkitu",
+        removeConnection       = "Kendu konexioa?",
+        removeConnectionDetail = "Honek Nostr Wallet Connect gako hau behin betiko indargabetuko du. Erabiltzen duen edozein app-ek sarbidea galduko du.",
+        remove                 = "Kendu",
+
+        noConnectionsYet    = "Oraindik konexiorik ez",
+        tapToAddHint        = "Sakatu + app bat Nostr Wallet Connect bidez konektatzeko.",
+        somethingWentWrong  = "Zerbait gaizki atera da",
+        retry               = "Saiatu berriro",
+
+        failedToLoadConnections  = "Huts egin du konexioak kargatzean",
+        failedToCreateConnection = "Huts egin du konexioa sortzean",
+        failedToDeleteConnection = "Huts egin du konexioa ezabatzean",
+        failedToLoadConnection   = "Huts egin du konexioa kargatzean",
+        ),
+    lock = LockStrings(
+        appLockTitle             = "App Blokeoa",
+        appLockDescription       = "Autentifikazio biometrikoa (hatz-marka, aurpegia edo PINa) eskatu Gudari Wallet irekitzen den bakoitzean.",
+        appLockToggleLabel       = "Aplikazioa irekitzean blokeatu",
+        appLockToggleEnabled     = "Gaituta (gomendatua)",
+        appLockToggleDisabled    = "Desgaituta",
+        appName                  = "Gudari Wallet",
+        authenticateToContinue   = "Autentifikatu jarraitzeko",
+        unlockButton             = "Desblokeatu",
+        biometricPromptTitle     = "Desblokeatu Gudari Wallet",
+        biometricPromptSubtitle  = "Autentifikatu zure zorrora sartzeko",
     )
 )

app/src/main/java/com/bitcointxoko/gudariwallet/i18n/Strings.kt

@@ -63,61 +63,8 @@ data class AppStrings(
     val details               : String,
     val enterValidAmount      : String,
     val satsUnit              : (sats: Long) -> String,
-
-    // ── ReceiveScreen — general ───────────────────────────────────────────────
-    val receive               : String,
-
-    // ── ReceiveScreen — error ─────────────────────────────────────────────────
-    val receiveError          : String,
-
-    // ── ReceiveScreen — QR / share ────────────────────────────────────────────
-    val lightningAddressQrCode  : String,
-    val lightningAddressLabel   : String,
-    val shareLightningAddress   : String,
-    val lightningInvoiceQrCode  : String,
-    val invoiceLabel            : String,
-    val shareInvoice            : String,
-
-    // ── ReceiveScreen — amount step ───────────────────────────────────────────
-    val amountInSats          : String,                        // text field label
-    val satsRange             : (min: Long, max: Long) -> String,
-
-    // ── ReceiveScreen — memo step ─────────────────────────────────────────────
-    val memoOptional          : String,
-    val memoPlaceholder       : String,
-    val creatingInvoice       : String,
-    val createInvoice         : String,
-
-    // ── ReceiveScreen — invoice ready ─────────────────────────────────────────
-    val waiting               : String,
-    val invoiceExpired        : String,
-    val newInvoice            : String,
-
-    // ── ReceiveScreen — lnurl withdraw ────────────────────────────────────────
-    val withdrawFrom          : String,
-    val minimumSats           : (min: Long) -> String,
-    val maximumSats           : (max: Long) -> String,
-    val withdrawButton        : String,                        // no fixed amount
-    val withdrawButtonAmount  : (amountSats: Long) -> String, // fixed amount
-
-    // ── ReceiveScreen — success ───────────────────────────────────────────────
-    val paymentReceived       : String,
-
-    // ── AmountDisplay ─────────────────────────────────────────────────────────
-    val amountDisplaySats : (amount: Long) -> String,
-
-    // ── BrightnessToggleButton & QrDisplayCard ────────────────────────────────
-    val brightnessReduce  : String,
-    val brightnessBoost   : String,
-    val qrShare           : String,
-    val qrCopy            : String,
-    val qrNfcStop         : String,
-    val qrNfcStart        : String,
-
-    // ── ReceiveViewModel ──────────────────────────────────────────────────────
-    val receiveVmFailedToCreateInvoice : String,
-    val receiveVmWithdrawRejected      : String,
-    val receiveVmWithdrawFailed        : String,
+    val today                 : String,
+    val yesterday             : String,
 
     // ── SendScreen — general ──────────────────────────────────────────────────
     val send                  : String,
@@ -204,6 +151,120 @@ data class AppStrings(
     val sendVmUnsupportedType            : (tag: String) -> String,
     val sendVmPaymentFailedRescan        : String,
 
+    val onboarding: OnboardingStrings,
+    val receive: ReceiveStrings,
+    val history: HistoryStrings,
+    val nwc: NwcStrings,
+    val lock: LockStrings
+)
+
+data class OnboardingStrings(
+    val title: String,
+    val subtitle: String,
+    val serverUrl: String,
+    val serverUrlHint: String,
+    val invoiceKey: String,
+    val invoiceKeySubtitle: String,
+    val pasteInvoiceKey: String,
+    val adminKey: String,
+    val adminKeySubtitle: String,
+    val pasteAdminKey: String,
+    val showAdminKey: String,
+    val hideAdminKey: String,
+    val connect: String,
+    val fieldsRequired: String,
+    val invalidKeyFormat: String,
+    val back: String,
+    val next: String,
+    val done: String,
+    val notificationsTitle: String,
+    val notificationsSubtitle: String,
+    val notificationsAlreadyGranted: String,
+    val allowNotifications: String,
+    val notificationsNote: String,
+    val notificationsAutoGranted: String,
+    val batteryTitle: String,
+    val batterySubtitle: String,
+    val openSettings: String,
+    val batteryNote: String,
+    val batteryAlreadyUnrestricted: String,
+    val paymentHistory: String,
+    val paymentHistorySubtitle: String,
+    val syncNow: String,
+    val skipForNow: String,
+    val syncScheduled: String,
+    val continueToApp: String,
+    val connecting: String,
+    val paymentsFetchedTotal: (fetched: Int, total: Int) -> String,
+    val paymentsSynced: (total: Int) -> String,
+    val syncComplete: String,
+    val syncFailed: String,
+    val scheduleForLater: String,
+    val scheduleSync: String,
+    val schedule: String,
+    val cancel: String
+)
+
+data class ReceiveStrings(
+    // ── ReceiveScreen — general ───────────────────────────────────────────────
+    val receive               : String,
+
+    // ── ReceiveScreen — error ─────────────────────────────────────────────────
+    val receiveError          : String,
+
+    // ── ReceiveScreen — QR / share ────────────────────────────────────────────
+    val lightningAddressQrCode  : String,
+    val lightningAddressLabel   : String,
+    val shareLightningAddress   : String,
+    val lightningInvoiceQrCode  : String,
+    val invoiceLabel            : String,
+    val shareInvoice            : String,
+
+    // ── ReceiveScreen — amount step ───────────────────────────────────────────
+    val amountInSats          : String,                        // text field label
+    val satsRange             : (min: Long, max: Long) -> String,
+
+    // ── ReceiveScreen — memo step ─────────────────────────────────────────────
+    val memoOptional          : String,
+    val memoPlaceholder       : String,
+    val creatingInvoice       : String,
+    val createInvoice         : String,
+
+    // ── ReceiveScreen — invoice ready ─────────────────────────────────────────
+    val waiting               : String,
+    val invoiceExpired        : String,
+    val newInvoice            : String,
+
+    // ── ReceiveScreen — lnurl withdraw ────────────────────────────────────────
+    val withdrawFrom          : String,
+    val minimumSats           : (min: Long) -> String,
+    val maximumSats           : (max: Long) -> String,
+    val withdrawButton        : String,                        // no fixed amount
+    val withdrawButtonAmount  : (amountSats: Long) -> String, // fixed amount
+
+    // ── ReceiveScreen — success ───────────────────────────────────────────────
+    val paymentReceived       : String,
+
+    // ── AmountDisplay ─────────────────────────────────────────────────────────
+    val amountDisplaySats : (amount: Long) -> String,
+
+    // ── BrightnessToggleButton & QrDisplayCard ────────────────────────────────
+    val brightnessReduce  : String,
+    val brightnessBoost   : String,
+    val qrShare           : String,
+    val qrCopy            : String,
+    val qrNfcStop         : String,
+    val qrNfcStart        : String,
+    val openInApp         : String,
+    val noAppFound        : String,
+
+    // ── ReceiveViewModel ──────────────────────────────────────────────────────
+    val receiveVmFailedToCreateInvoice : String,
+    val receiveVmWithdrawRejected      : String,
+    val receiveVmWithdrawFailed        : String,
+)
+
+data class HistoryStrings(
     // ── HistoryScreen ─────────────────────────────────────────────────────────
     val historyTitle              : String,
     val historyClose              : String,
@@ -303,52 +364,133 @@ data class AppStrings(
     val paymentRowNoMemo      : String,
     val paymentRowPending     : String,
     val paymentRowFailed     : String,
-
-    val onboarding: OnboardingStrings
 )
 
-data class OnboardingStrings(
-    val title: String,
-    val subtitle: String,
-    val serverUrl: String,
-    val serverUrlHint: String,
-    val invoiceKey: String,
-    val invoiceKeySubtitle: String,
-    val pasteInvoiceKey: String,
-    val adminKey: String,
-    val adminKeySubtitle: String,
-    val pasteAdminKey: String,
-    val showAdminKey: String,
-    val hideAdminKey: String,
-    val connect: String,
-    val fieldsRequired: String,
-    val back: String,
-    val next: String,
-    val done: String,
-    val notificationsTitle: String,
-    val notificationsSubtitle: String,
-    val notificationsAlreadyGranted: String,
-    val allowNotifications: String,
-    val notificationsNote: String,
-    val notificationsAutoGranted: String,
-    val batteryTitle: String,
-    val batterySubtitle: String,
-    val openSettings: String,
-    val batteryNote: String,
-    val batteryAlreadyUnrestricted: String,
-    val paymentHistory: String,
-    val paymentHistorySubtitle: String,
-    val syncNow: String,
-    val skipForNow: String,
-    val syncScheduled: String,
-    val continueToApp: String,
-    val connecting: String,
-    val paymentsFetchedTotal: (fetched: Int, total: Int) -> String,
-    val paymentsSynced: (total: Int) -> String,
-    val syncComplete: String,
-    val syncFailed: String,
-    val scheduleForLater: String,
-    val scheduleSync: String,
-    val schedule: String,
-    val cancel: String
+data class NwcStrings(
+
+    // ── Shared / navigation ───────────────────────────────────────────────────
+    val back : String,
+    val next : String,
+    val done : String,
+    val cancel : String,
+    val schedule : String,
+
+    // ── Connection detail ─────────────────────────────────────────────────────
+    val connectionDetailTitle      : String,
+    val connectionUnknownWallet    : String,
+    val connectionSectionDetails   : String,
+    val connectionRowCreated       : String,
+    val connectionRowLastUsed      : String,
+    val connectionRowExpires       : String,
+    val connectionRowPubkey        : String,
+    val connectionNeverUsed        : String,
+    val lastUsedToday     : String,   // e.g. "Last used today"
+    val lastUsedYesterday : String,   // e.g. "Last used yesterday"
+    val lastUsedDate      : String,   // e.g. "Last used %s" — %s is a formatted date
+    val connectionNoExpiry         : String,
+    /** "Expired · {date}" */
+    val connectionExpired          : (date: String) -> String,
+    val connectionSectionPermissions : String,
+    val connectionSectionBudgets   : String,
+    /** "{window} budget"  e.g. "Daily budget" */
+    val connectionBudgetTitle      : (window: String) -> String,
+    /** "Used: {sats} sats" */
+    val connectionBudgetUsed       : (sats: Long) -> String,
+    /** "of {sats} sats" */
+    val connectionBudgetTotal      : (sats: Long) -> String,
+    val connectionRevoke           : String,
+    val connectionStatusActive     : String,
+    val connectionStatusExpired    : String,
+
+    // ── NWC permission labels ─────────────────────────────────────────────────
+    val permPayInvoice         : String,
+    val permGetBalance         : String,
+    val permGetInfo            : String,
+    val permMakeInvoice        : String,
+    val permLookupInvoice      : String,
+    val permListTransactions   : String,
+    val permSignMessage        : String,
+    val permPay                : String,   // "Send payments"
+    val permInvoice            : String,   // "Create invoices"
+    val permLookup             : String,
+    val permHistory            : String,
+    val permBalance            : String,
+    val permInfo               : String,
+    val permLookupHistory      : String,   // "Lookup status & transaction history"
+    val permBalanceInfo        : String,   // "Read balance & account info"
+    val permSendPayments       : String,
+    val permCreateInvoices     : String,
+    val permLookupInvoiceStatus: String,
+    val permReadTransactionHistory: String,
+    val permReadWalletBalance: String,
+    val permReadAccountInfo: String,
+    val revokeDialogTitle   : String,
+    val revokeDialogBody    : String,
+    val revokeDialogConfirm : String,
+    val revokeDialogDismiss : String,
+    val refreshDaily   : String,
+    val refreshWeekly  : String,
+    val refreshMonthly : String,
+    val refreshYearly  : String,
+    val refreshNever   : String,
+
+    // New Connection
+    val newConnection           : String,
+    val labelHint               : String,
+    val expires                 : String,
+    val pickDate                : String,
+    val pickTime                : String,
+    val never                   : String,
+    val budgets                 : String,
+    val addBudget               : String,
+    val removeBudget            : String,
+    val permissions             : String,
+    val unnamed                 : String,
+    val creating                : String,
+    val createConnection        : String,
+    val ok                      : String,
+    val sats                    : String,
+    val resets                  : String,
+
+    val deleteConnection     : String,
+    val unnamedConnection    : String,
+    val neverUsed            : String,
+    val expired              : String,
+
+    val connectionCreated     : String,
+    val scanOrCopyHint        : String,
+    val nwcPairingQrCode      : String,
+    val nwcConnectionString   : String,
+    val shareNwcConnectionString : String,
+    val openInApp             : String,
+
+    val walletConnect         : String,
+    val addConnection         : String,
+    val noCompatibleAppFound  : String,
+    val removeConnection      : String,
+    val removeConnectionDetail: String,
+    val remove                : String,
+
+    val noConnectionsYet    : String,
+    val tapToAddHint        : String,
+    val somethingWentWrong  : String,
+    val retry               : String,
+
+    val failedToLoadConnections   : String,
+    val failedToCreateConnection  : String,
+    val failedToDeleteConnection : String,
+    val failedToLoadConnection   : String,
+    )
+
+data class LockStrings(
+    val appLockTitle: String,
+    val appLockDescription: String,
+    val appLockToggleLabel: String,
+    val appLockToggleEnabled: String,
+    val appLockToggleDisabled: String,
+    val appName: String,
+    val authenticateToContinue: String,
+    val unlockButton: String,
+    val biometricPromptTitle: String,
+    val biometricPromptSubtitle: String,
 )

app/src/main/java/com/bitcointxoko/gudariwallet/i18n/StringsExt.kt

@@ -1,8 +1,8 @@
 package com.bitcointxoko.gudariwallet.i18n
 
 fun AppStrings.paymentStatusLabel(status: String): String = when (status.lowercase()) {
-    "success"   -> statusSuccess
-    "pending"   -> statusPending
-    "failed"    -> statusFailed
-    else        -> statusUnknown
+    "success"   -> history.statusSuccess
+    "pending"   -> history.statusPending
+    "failed"    -> history.statusFailed
+    else        -> history.statusUnknown
 }

app/src/main/java/com/bitcointxoko/gudariwallet/security/CredentialsDataStore.kt

@@ -1,20 +1,15 @@
 package com.bitcointxoko.gudariwallet.security
 
 import android.content.Context
-import timber.log.Timber
 import androidx.datastore.core.DataStore
 import androidx.datastore.core.DataStoreFactory
 import androidx.datastore.core.handlers.ReplaceFileCorruptionHandler
 import androidx.datastore.migrations.SharedPreferencesMigration
-import androidx.datastore.migrations.SharedPreferencesView
 import com.bitcointxoko.gudariwallet.util.WalletConstants
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.SupervisorJob
-import kotlinx.coroutines.flow.first
-import kotlinx.coroutines.flow.map
 import java.io.File
-import androidx.core.content.edit
 
 /**
  * Singleton DataStore for encrypted credentials.
@@ -27,8 +22,6 @@ import androidx.core.content.edit
  * [cleanUpLegacyPrefs] once you've confirmed migration succeeded.
  */
 object CredentialsDataStore {
-    private const val TAG = "CredentialsDataStore"
-
     @Volatile
     private var instance: DataStore<Credentials>? = null
 

app/src/main/java/com/bitcointxoko/gudariwallet/security/CredentialsSerializer.kt

@@ -25,8 +25,8 @@ class CredentialsSerializer(
                 Timber.d("Credentials decrypted successfully — isOnboarded: ${result.isOnboarded}")
                 result
             } catch (e: Exception) {
-                Timber.e("Decryption failed — DataStore may be corrupt or key rotated", e)
-                throw CorruptionException("Cannot read/decrypt credentials DataStore", e)
+                Timber.e("Decryption failed — DataStore may be corrupt or key rotated")
+                throw CorruptionException("Cannot read/decrypt credentials DataStore")
             }
         }
 
@@ -37,12 +37,10 @@ class CredentialsSerializer(
                 val encryptingStream = streamingAead.newEncryptingStream(output, AAD)
                 t.writeTo(encryptingStream)   // returns Int — discarded by Unit return type
                 encryptingStream.close()
-                Timber.d("Credentials encrypted and written — isOnboarded: ${t.isOnboarded}, " +
-                        "hasInvoiceKey: ${t.invoiceKey.isNotBlank()}, " +
-                        "hasAdminKey: ${t.adminKey.isNotBlank()}, " +
-                        "hasBaseUrl: ${t.baseUrl.isNotBlank()}")
+                Timber.d("%snull", "Credentials encrypted and written — isOnboarded: ${t.isOnboarded}, " +
+                        "hasInvoiceKey: ${t.invoiceKey.isNotBlank()}, ")
             } catch (e: Exception) {
-                Timber.e("Encryption/write failed", e)
+                Timber.e("Encryption/write failed")
                 throw e
             }
         }

app/src/main/java/com/bitcointxoko/gudariwallet/security/CredentialsTinkManager.kt

@@ -38,7 +38,7 @@ object CredentialsTinkManager {
                 Timber.i("StreamingAead primitive acquired successfully")
             }
         } catch (e: Exception) {
-            Timber.e("Failed to initialise StreamingAead — Keystore may be unavailable", e)
+            Timber.e("Failed to initialise StreamingAead — Keystore may be unavailable")
             throw e
         }
     }

app/src/main/java/com/bitcointxoko/gudariwallet/service/NodeAliasService.kt

@@ -41,7 +41,7 @@ class NodeAliasService(
         repo.put(pubkey, alias)
 
         // 4. Publish to StateFlow
-        _aliases.value = _aliases.value + (pubkey to alias)
+        _aliases.value += (pubkey to alias)
 
         Timber.d("ALIAS [FETCHED   ] $pubkey → \"$alias\"")
         return alias

app/src/main/java/com/bitcointxoko/gudariwallet/service/WalletNotificationService.kt

@@ -7,8 +7,8 @@ import android.content.pm.ServiceInfo
 import android.os.Build
 import android.os.IBinder
 import timber.log.Timber
-import com.bitcointxoko.gudariwallet.api.GsonProvider
-import com.bitcointxoko.gudariwallet.api.LNbitsClient
+import com.bitcointxoko.gudariwallet.api.JsonProvider
+import com.bitcointxoko.gudariwallet.api.LNbitsHttpClient
 import com.bitcointxoko.gudariwallet.api.PaymentRecord
 import com.bitcointxoko.gudariwallet.api.WsPaymentMessage
 import com.bitcointxoko.gudariwallet.data.PaymentCacheRepository
@@ -30,6 +30,7 @@ import okhttp3.Request
 import okhttp3.Response
 import okhttp3.WebSocket
 import okhttp3.WebSocketListener
+import kotlin.time.Duration.Companion.milliseconds
 
 private const val TAG = "WalletNotifService"
 
@@ -98,7 +99,7 @@ class WalletNotificationService : Service() {
     private var reconnectAttempts = 0
     private var currentBackoffMs = WalletConstants.WS_INITIAL_BACKOFF_MS
 
-    private val gson = GsonProvider.gson
+    private val json = JsonProvider.json
     // ── Lifecycle ─────────────────────────────────────────────────────────────
 
     override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
@@ -157,7 +158,7 @@ class WalletNotificationService : Service() {
 
         val request = Request.Builder().url(wsUrl).build()
 
-        webSocket = LNbitsClient.httpClient.newWebSocket(request, object : WebSocketListener() {
+        webSocket = LNbitsHttpClient.instance.newWebSocket(request, object : WebSocketListener() {
 
             override fun onOpen(webSocket: WebSocket, response: Response) {
                 Timber.d("WebSocket connected")
@@ -193,7 +194,7 @@ class WalletNotificationService : Service() {
 
     private fun handleMessage(text: String) {
         val msg = runCatching {
-            gson.fromJson(text, WsPaymentMessage::class.java)
+            json.decodeFromString(WsPaymentMessage.serializer(), text)
         }.getOrNull() ?: return
 
         val payment = msg.payment ?: return
@@ -271,7 +272,7 @@ class WalletNotificationService : Service() {
 
         reconnectJob?.cancel()
         reconnectJob = serviceScope.launch {
-            delay(backoff)
+            delay(backoff.milliseconds)
             openWebSocket()
         }
     }

app/src/main/java/com/bitcointxoko/gudariwallet/ui/HomeTab.kt

@@ -25,6 +25,8 @@ import androidx.compose.material.icons.filled.Language          // ← NEW
 import androidx.compose.ui.text.input.ImeAction
 import androidx.compose.foundation.text.KeyboardActions
 import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.material.icons.filled.Cable
+import androidx.compose.material.icons.filled.People
 import androidx.compose.ui.text.input.KeyboardType
 import androidx.compose.ui.platform.LocalFocusManager
 import com.bitcointxoko.gudariwallet.util.formatFiat
@@ -38,6 +40,8 @@ import com.bitcointxoko.gudariwallet.i18n.AppStrings
 fun HomeTab(
     vm: WalletViewModel,
     onHistoryClick: () -> Unit,
+    onNwcClick    : () -> Unit,
+    onContactsClick: () -> Unit,
     lyricist: Lyricist<AppStrings>              // ← NEW: passed in from wherever you call ProvideStrings
 ) {
     val strings = LocalAppStrings.current
@@ -50,235 +54,258 @@ fun HomeTab(
 
     val isRefreshing = balanceState is BalanceState.Loading
             || (balanceState as? BalanceState.Success)?.isRefreshing == true
-
-    PullToRefreshBox(
-        isRefreshing = isRefreshing,
-        onRefresh    = { vm.refreshBalance() },
-        modifier     = Modifier.fillMaxSize()
-    ) {
-        Column(
-            modifier            = Modifier
-                .fillMaxSize()
-                .verticalScroll(rememberScrollState())
-                .padding(24.dp),
-            horizontalAlignment = Alignment.CenterHorizontally,
-            verticalArrangement = Arrangement.Center
+    Box(modifier = Modifier.fillMaxSize()) {
+        PullToRefreshBox(
+            isRefreshing = isRefreshing,
+            onRefresh = { vm.refreshBalance() },
+            modifier = Modifier.fillMaxSize()
         ) {
-            when (val s = balanceState) {
-
-                is BalanceState.Loading -> {
-                    CircularProgressIndicator()
-                    Spacer(Modifier.height(12.dp))
-                    Text(
-                        text  = strings.loadingBalance,
-                        style = MaterialTheme.typography.bodyMedium,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant
-                    )
-                }
-
-                is BalanceState.Success -> {
-                    val selectedCurrency by vm.selectedCurrency.collectAsState()
-                    var showCurrencyPicker by remember { mutableStateOf(false) }
-                    var isLoadingCurrencies by remember { mutableStateOf(false) }
-                    var currencyList by remember { mutableStateOf<List<String>>(emptyList()) }
-                    LaunchedEffect(showCurrencyPicker) {
-                        if (showCurrencyPicker && currencyList.isEmpty()) {
-                            isLoadingCurrencies = true
-                            currencyList = vm.getSupportedCurrencies()
-                            isLoadingCurrencies = false
-                        }
-                    }
-                    Row(
-                        verticalAlignment = Alignment.CenterVertically
-                    ) {
-                        Icon(
-                            imageVector        = if (balanceHidden)
-                                Icons.Filled.VisibilityOff
-                            else
-                                Icons.Filled.Visibility,
-                            contentDescription = null,
-                            tint               = MaterialTheme.colorScheme.onSurfaceVariant,
-                            modifier           = Modifier.size(20.dp)
-                        )
-
-                        Spacer(Modifier.width(8.dp))
+            Column(
+                modifier = Modifier
+                    .fillMaxSize()
+                    .verticalScroll(rememberScrollState())
+                    .padding(24.dp),
+                horizontalAlignment = Alignment.CenterHorizontally,
+                verticalArrangement = Arrangement.Center
+            ) {
+                when (val s = balanceState) {
 
+                    is BalanceState.Loading -> {
+                        CircularProgressIndicator()
+                        Spacer(Modifier.height(12.dp))
                         Text(
-                            text      = if (balanceHidden) "••••••" else formatSats(s.sats),
-                            style     = MaterialTheme.typography.displayLarge.copy(
-                                fontFamily = FontFamily.Monospace
-                            ),
-                            color    = if (balanceHidden)
-                                MaterialTheme.colorScheme.onSurface.copy(alpha = 0.35f)
-                            else
-                                MaterialTheme.colorScheme.primary,
-                            maxLines = 1,
-                            softWrap = false,
-                            modifier = Modifier
-                                .widthIn(max = 280.dp)
-                                .combinedClickable(
-                                    onClick           = { if (!balanceHidden) vm.toggleBalanceVisibility() },
-                                    onClickLabel      = if (balanceHidden) null else strings.hideBalance,
-                                    onLongClick       = { if (balanceHidden) vm.toggleBalanceVisibility() },
-                                    onLongClickLabel  = if (balanceHidden) strings.revealBalance else null,
-                                    indication        = null,
-                                    interactionSource = remember { MutableInteractionSource() }
-                                )
-                        )
-                        Spacer(Modifier.width(8.dp))
-                        Text(
-                            text  = strings.sats,
-                            style = MaterialTheme.typography.titleMedium.copy(
-                                fontFamily = FontFamily.Monospace
-                            ),
+                            text = strings.loadingBalance,
+                            style = MaterialTheme.typography.bodyMedium,
                             color = MaterialTheme.colorScheme.onSurfaceVariant
                         )
-                        Spacer(Modifier.width(8.dp))
                     }
-                    Spacer(Modifier.height(2.dp))
-                    val currency = selectedCurrency
-                    if (currency != null) {
-                        Row(
-                            verticalAlignment     = Alignment.CenterVertically,
-                            horizontalArrangement = Arrangement.Center
-                        ) {
-                            if (s.fiatAmount != null && s.fiatCurrency != null) {
-                                Text(
-                                    text  = if (balanceHidden) "••••"
-                                    else formatFiat(s.fiatAmount, s.fiatCurrency),
-                                    style = MaterialTheme.typography.bodyMedium.copy(
-                                        fontFamily = FontFamily.Monospace
-                                    ),
-                                    color = if (balanceHidden)
-                                        MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.35f)
-                                    else
-                                        MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.75f),
-                                    maxLines = 1,
-                                    softWrap = false
-                                )
-                                Spacer(Modifier.width(4.dp))
+
+                    is BalanceState.Success -> {
+                        val selectedCurrency by vm.selectedCurrency.collectAsState()
+                        var showCurrencyPicker by remember { mutableStateOf(false) }
+                        var isLoadingCurrencies by remember { mutableStateOf(false) }
+                        var currencyList by remember { mutableStateOf<List<String>>(emptyList()) }
+                        LaunchedEffect(showCurrencyPicker) {
+                            if (showCurrencyPicker && currencyList.isEmpty()) {
+                                isLoadingCurrencies = true
+                                currencyList = vm.getSupportedCurrencies()
+                                isLoadingCurrencies = false
                             }
-                            Row(
-                                verticalAlignment = Alignment.CenterVertically,
-                                modifier          = Modifier
-                                    .clickable(
-                                        onClick           = { showCurrencyPicker = true },
-                                        onClickLabel      = strings.changeCurrency,
-                                        indication        = null,
+                        }
+                        Row(
+                            verticalAlignment = Alignment.CenterVertically
+                        ) {
+                            Icon(
+                                imageVector = if (balanceHidden)
+                                    Icons.Filled.VisibilityOff
+                                else
+                                    Icons.Filled.Visibility,
+                                contentDescription = null,
+                                tint = MaterialTheme.colorScheme.onSurfaceVariant,
+                                modifier = Modifier.size(20.dp)
+                            )
+
+                            Spacer(Modifier.width(8.dp))
+
+                            Text(
+                                text = if (balanceHidden) "••••••" else formatSats(s.sats),
+                                style = MaterialTheme.typography.displayLarge.copy(
+                                    fontFamily = FontFamily.Monospace
+                                ),
+                                color = if (balanceHidden)
+                                    MaterialTheme.colorScheme.onSurface.copy(alpha = 0.35f)
+                                else
+                                    MaterialTheme.colorScheme.primary,
+                                maxLines = 1,
+                                softWrap = false,
+                                modifier = Modifier
+                                    .widthIn(max = 280.dp)
+                                    .combinedClickable(
+                                        onClick = { if (!balanceHidden) vm.toggleBalanceVisibility() },
+                                        onClickLabel = if (balanceHidden) null else strings.hideBalance,
+                                        onLongClick = { if (balanceHidden) vm.toggleBalanceVisibility() },
+                                        onLongClickLabel = if (balanceHidden) strings.revealBalance else null,
+                                        indication = null,
                                         interactionSource = remember { MutableInteractionSource() }
                                     )
-                                    .padding(horizontal = 4.dp, vertical = 4.dp)
+                            )
+                            Spacer(Modifier.width(8.dp))
+                            Text(
+                                text = strings.sats,
+                                style = MaterialTheme.typography.titleMedium.copy(
+                                    fontFamily = FontFamily.Monospace
+                                ),
+                                color = MaterialTheme.colorScheme.onSurfaceVariant
+                            )
+                            Spacer(Modifier.width(8.dp))
+                        }
+                        Spacer(Modifier.height(2.dp))
+                        val currency = selectedCurrency
+                        if (currency != null) {
+                            Row(
+                                verticalAlignment = Alignment.CenterVertically,
+                                horizontalArrangement = Arrangement.Center
+                            ) {
+                                if (s.fiatAmount != null && s.fiatCurrency != null) {
+                                    Text(
+                                        text = if (balanceHidden) "••••"
+                                        else formatFiat(s.fiatAmount, s.fiatCurrency),
+                                        style = MaterialTheme.typography.bodyMedium.copy(
+                                            fontFamily = FontFamily.Monospace
+                                        ),
+                                        color = if (balanceHidden)
+                                            MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.35f)
+                                        else
+                                            MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.75f),
+                                        maxLines = 1,
+                                        softWrap = false
+                                    )
+                                    Spacer(Modifier.width(4.dp))
+                                }
+                                Row(
+                                    verticalAlignment = Alignment.CenterVertically,
+                                    modifier = Modifier
+                                        .clickable(
+                                            onClick = { showCurrencyPicker = true },
+                                            onClickLabel = strings.changeCurrency,
+                                            indication = null,
+                                            interactionSource = remember { MutableInteractionSource() }
+                                        )
+                                        .padding(horizontal = 4.dp, vertical = 4.dp)
+                                ) {
+                                    Text(
+                                        text = currency,
+                                        style = MaterialTheme.typography.bodyMedium.copy(
+                                            fontFamily = FontFamily.Monospace
+                                        ),
+                                        color = MaterialTheme.colorScheme.onSurfaceVariant.copy(
+                                            alpha = 0.75f
+                                        )
+                                    )
+                                    Spacer(Modifier.width(2.dp))
+                                    Icon(
+                                        imageVector = Icons.Filled.ArrowDropDown,
+                                        contentDescription = strings.changeCurrency,
+                                        tint = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.5f),
+                                        modifier = Modifier.size(14.dp)
+                                    )
+                                }
+                            }
+                        } else {
+                            TextButton(
+                                onClick = { showCurrencyPicker = true },
+                                contentPadding = PaddingValues(horizontal = 8.dp, vertical = 2.dp)
                             ) {
                                 Text(
-                                    text  = currency,
-                                    style = MaterialTheme.typography.bodyMedium.copy(
-                                        fontFamily = FontFamily.Monospace
-                                    ),
-                                    color = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.75f)
-                                )
-                                Spacer(Modifier.width(2.dp))
-                                Icon(
-                                    imageVector        = Icons.Filled.ArrowDropDown,
-                                    contentDescription = strings.changeCurrency,
-                                    tint               = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.5f),
-                                    modifier           = Modifier.size(14.dp)
+                                    text = strings.showFiat,
+                                    style = MaterialTheme.typography.bodySmall,
+                                    color = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.45f)
                                 )
                             }
                         }
-                    } else {
-                        TextButton(
-                            onClick        = { showCurrencyPicker = true },
-                            contentPadding = PaddingValues(horizontal = 8.dp, vertical = 2.dp)
-                        ) {
+
+                        Spacer(Modifier.height(8.dp))
+
+                        if (!s.isRefreshing) {
+                            val updatedLabel: String = remember(s.lastUpdated) {
+                                formatLastUpdated(s.lastUpdated, strings)
+                            }
                             Text(
-                                text  = strings.showFiat,
+                                text = strings.updatedAt(updatedLabel),
                                 style = MaterialTheme.typography.bodySmall,
-                                color = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.45f)
+                                color = MaterialTheme.colorScheme.onSurfaceVariant
                             )
                         }
-                    }
 
-                    Spacer(Modifier.height(8.dp))
+                        Spacer(Modifier.height(16.dp))
 
-                    if (!s.isRefreshing) {
-                        val updatedLabel: String = remember(s.lastUpdated) {
-                            formatLastUpdated(s.lastUpdated, strings)
+                        TextButton(onClick = onHistoryClick) {
+                            Text(
+                                text = strings.viewHistory,
+                                style = MaterialTheme.typography.labelLarge,
+                                color = MaterialTheme.colorScheme.primary
+                            )
                         }
-                        Text(
-                            text  = strings.updatedAt(updatedLabel),
-                            style = MaterialTheme.typography.bodySmall,
-                            color = MaterialTheme.colorScheme.onSurfaceVariant
-                        )
-                    }
 
-                    Spacer(Modifier.height(16.dp))
-
-                    TextButton(onClick = onHistoryClick) {
-                        Text(
-                            text  = strings.viewHistory,
-                            style = MaterialTheme.typography.labelLarge,
-                            color = MaterialTheme.colorScheme.primary
-                        )
-                    }
-
-                    // ── NEW: Language switcher ─────────────────────────────────
+                        // ── NEW: Language switcher ─────────────────────────────────
 //                    Spacer(Modifier.height(8.dp))
 //                    LanguageSwitcherButton(
 //                        currentTag    = lyricist.languageTag,
 //                        supportedTags = supportedTags,
 //                        onSelect      = { tag -> lyricist.languageTag = tag }
 //                    )
-                    // ──────────────────────────────────────────────────────────
+                        // ──────────────────────────────────────────────────────────
 
-                    if (showCurrencyPicker) {
-                        CurrencyPickerSheet(
-                            currencies       = currencyList,
-                            selectedCurrency = selectedCurrency,
-                            onSelect         = { code ->
-                                vm.setSelectedCurrency(code)
-                                showCurrencyPicker = false
-                            },
-                            isLoading        = isLoadingCurrencies,
-                            onDismiss        = { showCurrencyPicker = false }
-                        )
-                    }
-                }
-
-                is BalanceState.Error -> {
-                    if (s.staleSats != null) {
-                        Text(
-                            text  = if (balanceHidden) "••••••" else formatSats(s.staleSats),
-                            style = MaterialTheme.typography.displayLarge.copy(
-                                fontFamily = FontFamily.Monospace
-                            ),
-                            color = MaterialTheme.colorScheme.onSurface.copy(alpha = 0.4f)
-                        )
-                        Text(
-                            text  = strings.sats,
-                            style = MaterialTheme.typography.titleMedium,
-                            color = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.4f)
-                        )
-                        Spacer(Modifier.height(12.dp))
-                    }
-
-                    Surface(
-                        color    = MaterialTheme.colorScheme.errorContainer,
-                        shape    = MaterialTheme.shapes.small,
-                        modifier = Modifier.fillMaxWidth(0.85f)
-                    ) {
-                        Text(
-                            text     = if (s.staleSats != null)
-                                strings.couldNotRefresh
-                            else
-                                strings.couldNotLoadBalance,
-                            style    = MaterialTheme.typography.bodySmall,
-                            color    = MaterialTheme.colorScheme.onErrorContainer,
-                            modifier = Modifier.padding(12.dp)
-                        )
+                        if (showCurrencyPicker) {
+                            CurrencyPickerSheet(
+                                currencies = currencyList,
+                                selectedCurrency = selectedCurrency,
+                                onSelect = { code ->
+                                    vm.setSelectedCurrency(code)
+                                    showCurrencyPicker = false
+                                },
+                                isLoading = isLoadingCurrencies,
+                                onDismiss = { showCurrencyPicker = false }
+                            )
+                        }
+                    }
+
+                    is BalanceState.Error -> {
+                        if (s.staleSats != null) {
+                            Text(
+                                text = if (balanceHidden) "••••••" else formatSats(s.staleSats),
+                                style = MaterialTheme.typography.displayLarge.copy(
+                                    fontFamily = FontFamily.Monospace
+                                ),
+                                color = MaterialTheme.colorScheme.onSurface.copy(alpha = 0.4f)
+                            )
+                            Text(
+                                text = strings.sats,
+                                style = MaterialTheme.typography.titleMedium,
+                                color = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.4f)
+                            )
+                            Spacer(Modifier.height(12.dp))
+                        }
+
+                        Surface(
+                            color = MaterialTheme.colorScheme.errorContainer,
+                            shape = MaterialTheme.shapes.small,
+                            modifier = Modifier.fillMaxWidth(0.85f)
+                        ) {
+                            Text(
+                                text = if (s.staleSats != null)
+                                    strings.couldNotRefresh
+                                else
+                                    strings.couldNotLoadBalance,
+                                style = MaterialTheme.typography.bodySmall,
+                                color = MaterialTheme.colorScheme.onErrorContainer,
+                                modifier = Modifier.padding(12.dp)
+                            )
+                        }
                     }
                 }
             }
         }
+        Row(
+            modifier = Modifier
+                .align(Alignment.TopEnd)
+                .padding(8.dp)
+        ) {
+            IconButton(onClick = onContactsClick) {
+                Icon(
+                    imageVector = Icons.Filled.People,
+                    contentDescription = "Contacts",
+                    tint = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.7f)
+                )
+            }
+            IconButton(onClick = onNwcClick) {
+                Icon(
+                    imageVector = Icons.Filled.Cable,
+                    contentDescription = "Wallet Connect",
+                    tint = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.7f)
+                )
+            }
+        }
     }
 }
 

app/src/main/java/com/bitcointxoko/gudariwallet/ui/WalletScreen.kt

@@ -57,16 +57,26 @@ import cafe.adriel.lyricist.Lyricist
 import com.bitcointxoko.gudariwallet.MainActivity
 import com.bitcointxoko.gudariwallet.i18n.AppStrings
 import com.bitcointxoko.gudariwallet.LocalAppStrings
+import com.bitcointxoko.gudariwallet.ui.contacts.ContactsScreen
+import com.bitcointxoko.gudariwallet.ui.contacts.ContactsViewModel
 import com.bitcointxoko.gudariwallet.ui.history.HistoryScreen
 import com.bitcointxoko.gudariwallet.ui.history.HistoryViewModel
 import com.bitcointxoko.gudariwallet.ui.history.HistoryViewModelFactory
 import com.bitcointxoko.gudariwallet.ui.history.PaymentDetailScreen
 import com.bitcointxoko.gudariwallet.ui.nfc.NfcViewModel
+import com.bitcointxoko.gudariwallet.ui.nwc.ConnectionDetailScreen
+import com.bitcointxoko.gudariwallet.ui.nwc.ConnectionDetailState
+import com.bitcointxoko.gudariwallet.ui.nwc.NwcScreen
+import com.bitcointxoko.gudariwallet.ui.nwc.NwcViewModel
 import com.bitcointxoko.gudariwallet.ui.receive.ReceiveScreen
 import com.bitcointxoko.gudariwallet.ui.send.SendScreen
 import com.bitcointxoko.gudariwallet.ui.send.SendStrings
 import com.bitcointxoko.gudariwallet.util.SendInputType
+import com.bitcointxoko.gudariwallet.data.ContactRepository
+import com.bitcointxoko.gudariwallet.ui.contacts.ContactDetailScreen
+import com.bitcointxoko.gudariwallet.ui.contacts.ContactDetailViewModel
 import kotlinx.coroutines.delay
+import kotlin.time.Duration.Companion.milliseconds
 
 // ── Tab destinations ──────────────────────────────────────────────────────────
 // Note: label and icon are now resolved at the call site via LocalAppStrings,
@@ -81,6 +91,11 @@ private const val ROUTE_HOME           = "home"
 private const val ROUTE_SCANNER        = "scanner"
 private const val ROUTE_HISTORY        = "history"
 private const val ROUTE_PAYMENT_DETAIL = "payment_detail/{checkingId}"
+private const val ROUTE_NWC = "nwc"
+private const val ROUTE_CONNECTION_DETAIL = "connection_detail/{pubkey}"
+private const val ROUTE_CONTACTS = "contacts"
+private const val ROUTE_CONTACT_DETAIL = "contacts/{contactId}"
+
 
 @Composable
 fun WalletScreen(
@@ -115,11 +130,18 @@ fun WalletScreen(
             repo            = vm.repo,
             aliasRepo       = vm.aliasRepo,
             paymentCache    = vm.paymentCache,
+            contactRepo     = vm.contactRepo,
             fiatCurrency    = vm.selectedCurrency,
             fiatSatsPerUnit = vm.fiatSatsPerUnit
         )
     }
     val historyVm: HistoryViewModel = viewModel(factory = historyFactory)
+    val nwcVm: NwcViewModel = viewModel(
+        factory = NwcViewModel.Factory(repo = vm.repo, cache = vm.nwcCache)  // same pattern as historyVm
+    )
+    val contactsVm: ContactsViewModel = viewModel(
+        factory = ContactsViewModel.Factory(vm.contactRepo)
+    )
 
     val navBackStackEntry by navController.currentBackStackEntryAsState()
     val currentRoute = navBackStackEntry?.destination?.route
@@ -127,10 +149,18 @@ fun WalletScreen(
     val showBottomBar = currentRoute != ROUTE_PAYMENT_DETAIL
             && currentRoute != ROUTE_SCANNER
             && currentRoute != ROUTE_HISTORY
+            && currentRoute != ROUTE_NWC
+            && currentRoute != ROUTE_CONNECTION_DETAIL
+            && currentRoute != ROUTE_CONTACTS
+            && currentRoute != ROUTE_CONTACT_DETAIL
 
     val isFullScreenDestination = currentRoute == ROUTE_HISTORY
             || currentRoute == ROUTE_PAYMENT_DETAIL
             || currentRoute == ROUTE_SCANNER
+            || currentRoute == ROUTE_NWC
+            || currentRoute == ROUTE_CONNECTION_DETAIL
+            || currentRoute == ROUTE_CONTACTS
+            || currentRoute == ROUTE_CONTACT_DETAIL
 
     // ── Notification tap ──────────────────────────────────────────────────────
     val hash = pendingPaymentHash.value
@@ -192,7 +222,7 @@ fun WalletScreen(
 
     LaunchedEffect(clipboardOffer) {
         if (clipboardOffer is ClipboardOfferState.Detected) {
-            delay(8_000)
+            delay(8_000.milliseconds)
             vm.dismissClipboardOffer()
         }
     }
@@ -202,7 +232,7 @@ fun WalletScreen(
 
     LaunchedEffect(nfcOffer) {
         if (nfcOffer is NfcOfferState.Detected) {
-            delay(8_000)
+            delay(8_000.milliseconds)
             nfcVm.dismissNfcOffer()
         }
     }
@@ -322,6 +352,14 @@ fun WalletScreen(
                                 launchSingleTop = true
                             }
                         },
+                        onNwcClick     = {
+                            navController.navigate(ROUTE_NWC) {
+                                launchSingleTop = true
+                            }
+                        },
+                        onContactsClick = {
+                            navController.navigate(ROUTE_CONTACTS) { launchSingleTop = true }
+                        },
                         lyricist       = lyricist
                     )
                 }
@@ -415,6 +453,103 @@ fun WalletScreen(
                         }
                     }
                 }
+                composable(
+                    ROUTE_NWC,
+                    enterTransition   = { fadeIn(animationSpec = tween(150)) },
+                    popExitTransition = { fadeOut(animationSpec = tween(150)) }
+                ) {
+                    NwcScreen(
+                        viewModel = nwcVm,
+                        onBack    = {
+                            navController.popBackStack(ROUTE_HOME, inclusive = false)
+                        },
+                        onConnectionClick = { pubkey ->
+                            navController.navigate("connection_detail/$pubkey") {
+                                launchSingleTop = true
+                            }
+                        }
+                    )
+                }
+                composable(
+                    route     = ROUTE_CONNECTION_DETAIL,
+                    arguments = listOf(navArgument("pubkey") { type = NavType.StringType }),
+                    enterTransition   = { fadeIn(animationSpec = tween(150)) },
+                    popExitTransition = { fadeOut(animationSpec = tween(150)) }
+                ) { backStackEntry ->
+                    val pubkey = backStackEntry.arguments?.getString("pubkey") ?: ""
+
+                    val connectionState by nwcVm.connectionDetailState.collectAsStateWithLifecycle()
+
+                    LaunchedEffect(pubkey)  { nwcVm.loadConnectionDetail(pubkey, strings) }
+                    DisposableEffect(Unit)  { onDispose { nwcVm.clearConnectionDetail() } }
+
+                    when (val state = connectionState) {
+                        is ConnectionDetailState.Loading -> {
+                            Box(
+                                modifier         = Modifier.fillMaxSize(),
+                                contentAlignment = Alignment.Center
+                            ) { CircularProgressIndicator() }
+                        }
+
+                        is ConnectionDetailState.Error -> {
+                            Box(
+                                modifier         = Modifier.fillMaxSize(),
+                                contentAlignment = Alignment.Center
+                            ) {
+                                Text(
+                                    text  = state.message,
+                                    color = MaterialTheme.colorScheme.error,
+                                    style = MaterialTheme.typography.bodyMedium
+                                )
+                            }
+                        }
+
+                        is ConnectionDetailState.Success -> {
+                            ConnectionDetailScreen(
+                                connection = state.connection,
+                                budgets    = state.budgets,
+                                onBack     = { navController.popBackStack() },
+                                onRevoke   = {
+                                    nwcVm.deleteConnection(pubkey, strings)
+                                    navController.popBackStack()
+                                }
+                            )
+                        }
+                    }
+                }
+                composable(
+                    ROUTE_CONTACTS,
+                    enterTransition   = { fadeIn(animationSpec = tween(150)) },
+                    popExitTransition = { fadeOut(animationSpec = tween(150)) }
+                ) {
+                    ContactsScreen(
+                        viewModel = contactsVm,
+                        onContactClick = { contactId ->
+                            navController.navigate("contacts/$contactId") {
+                                launchSingleTop = true
+                            }
+                        },
+                        onBack = {
+                            navController.popBackStack(ROUTE_HOME, inclusive = false)
+                        }
+                    )
+                }
+                composable(
+                    route = ROUTE_CONTACT_DETAIL,
+                    arguments = listOf(navArgument("contactId") { type = NavType.StringType }),
+                    enterTransition   = { fadeIn(animationSpec = tween(150)) },
+                    popExitTransition = { fadeOut(animationSpec = tween(150)) }
+                ) { backStackEntry ->
+                    val contactId = backStackEntry.arguments?.getString("contactId") ?: ""
+                    val detailVm: ContactDetailViewModel = viewModel(
+                        key     = contactId,
+                        factory = ContactDetailViewModel.Factory(contactId, vm.contactRepo)
+                    )
+                    ContactDetailScreen(
+                        viewModel = detailVm,
+                        onBack    = { navController.popBackStack() }
+                    )
+                }
             }
 
             // ── Clipboard banner — floats over content, slides in from top ────

app/src/main/java/com/bitcointxoko/gudariwallet/ui/WalletViewModel.kt

@@ -11,7 +11,11 @@ import kotlinx.coroutines.flow.SharedFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.launch
 import com.bitcointxoko.gudariwallet.data.BalancePrefsStore
+import com.bitcointxoko.gudariwallet.data.ContactRepository
 import com.bitcointxoko.gudariwallet.data.LightningAddressStore
+import com.bitcointxoko.gudariwallet.data.NwcCacheRepository
+import com.bitcointxoko.gudariwallet.data.db.ContactEntity
+import com.bitcointxoko.gudariwallet.data.db.PaymentAddressType
 import com.bitcointxoko.gudariwallet.ui.balance.BalanceViewModel
 import com.bitcointxoko.gudariwallet.ui.clipboard.ClipboardViewModel
 import com.bitcointxoko.gudariwallet.ui.fiat.FiatViewModel
@@ -20,6 +24,7 @@ import com.bitcointxoko.gudariwallet.ui.send.SendEvent
 import com.bitcointxoko.gudariwallet.ui.send.SendStrings
 import com.bitcointxoko.gudariwallet.ui.send.SendViewModel
 import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.stateIn
 
 private const val TAG = "WalletViewModel"
@@ -28,6 +33,8 @@ class WalletViewModel(
     val         repo      : WalletRepository,
     val         aliasRepo : NodeAliasRepository,
     val         paymentCache: PaymentCacheRepository,
+    val         nwcCache     : NwcCacheRepository,
+    val         contactRepo  : ContactRepository,
     private val balancePrefs: BalancePrefsStore,
     private val lnAddressStore     : LightningAddressStore,
     val         balanceVm    : BalanceViewModel,
@@ -124,6 +131,32 @@ class WalletViewModel(
     fun checkClipboard(text: String?)  = clipboardVm.checkClipboard(text)
     fun dismissClipboardOffer()        = clipboardVm.dismissClipboardOffer()
 
+    val contactForCurrentLnurl: StateFlow<ContactEntity?> =
+        sendVm.sendState
+            .map { state ->
+                val lnurl = (state as? SendState.LnurlReady)?.lnurl
+                    ?: return@map null
+                contactRepo.findByLnAddress(lnurl)
+                    ?: contactRepo.findByLnurl(lnurl)
+            }
+            .stateIn(
+                scope = viewModelScope,
+                started = SharingStarted.WhileSubscribed(5_000),
+                initialValue = null
+            )
+
+    fun saveContactFromSend(name: String, addressType: PaymentAddressType?, address: String?) {
+        viewModelScope.launch {
+            val lnAddress = address?.takeIf { addressType == PaymentAddressType.LIGHTNING_ADDRESS }
+            val lnUrl     = address?.takeIf { addressType == PaymentAddressType.LNURL }
+            contactRepo.createContact(
+                localAlias = name,
+                lnAddress  = lnAddress,
+                lnUrl      = lnUrl
+            )
+        }
+    }
+
     init {
         observePaymentEvents()
         fetchLightningAddress()

app/src/main/java/com/bitcointxoko/gudariwallet/ui/WalletViewModelFactory.kt

@@ -11,6 +11,8 @@ import com.bitcointxoko.gudariwallet.data.NodeAliasServiceRepository
 import com.bitcointxoko.gudariwallet.data.LNbitsWalletRepository
 import com.bitcointxoko.gudariwallet.data.LightningAddressStore
 import com.bitcointxoko.gudariwallet.data.LnurlCacheRepository
+import com.bitcointxoko.gudariwallet.data.NwcCacheRepository
+import com.bitcointxoko.gudariwallet.data.ContactRepository
 import com.bitcointxoko.gudariwallet.data.PaymentCacheRepository
 import com.bitcointxoko.gudariwallet.security.EncryptedSecretStore
 import com.bitcointxoko.gudariwallet.service.NodeAliasService
@@ -24,17 +26,19 @@ import com.bitcointxoko.gudariwallet.ui.send.PaymentPoller
 import com.bitcointxoko.gudariwallet.ui.send.SendViewModel
 
 class WalletViewModelFactory(private val app: Application) : ViewModelProvider.Factory {
+    private val lnbitsClient = LNbitsClient(EncryptedSecretStore(app))
     override fun <T : ViewModel> create(modelClass: Class<T>): T {
         val secrets      = EncryptedSecretStore(app)
-        val api          = LNbitsClient.create(secrets)
         val nodeAliasSvc = NodeAliasService(apiClient = NodeAliasClient(), context = app)
         val aliasRepo    = NodeAliasServiceRepository(nodeAliasSvc)
-        val repo         = LNbitsWalletRepository(api = api, secrets = secrets)
+        val repo         = LNbitsWalletRepository(api = lnbitsClient.api, secrets = secrets)
         val lnurlCache   = LnurlCacheRepository(app)
         val lnurlScanner = LnurlScanner(repo = repo, lnurlCache = lnurlCache)
         val lnurlPayer = LnurlPayer(repo = repo, scanner = lnurlScanner, cache = lnurlCache)
         val poller     = PaymentPoller(repo)
         val paymentCache = PaymentCacheRepository(app)
+        val nwcCache     = NwcCacheRepository(app)
+        val contactRepo = ContactRepository(app)
         val fiatDataStore = FiatDataStore(app)
         val balancePrefs = BalancePrefsStore(app)
         val lnAddressStore = LightningAddressStore(app)
@@ -62,6 +66,8 @@ class WalletViewModelFactory(private val app: Application) : ViewModelProvider.F
             repo,
             aliasRepo = aliasRepo,
             paymentCache = paymentCache,
+            nwcCache       = nwcCache,
+            contactRepo = contactRepo,
             balancePrefs = balancePrefs,
             balanceVm = balanceVm,
             fiatVm = fiatVm,

app/src/main/java/com/bitcointxoko/gudariwallet/ui/balance/BalanceViewModel.kt

@@ -75,11 +75,10 @@ class BalanceViewModel(
             runCatching { repo.getBalance() }
                 .onSuccess { balance ->
                     val sats = balance.sats
-                    val prev = (_balanceState.value as? BalanceState.Success)?.sats
-                    when {
-                        prev == null -> Timber.d("BALANCE [NETWORK   ] $sats sats — cold load complete")
-                        prev == sats -> Timber.d("BALANCE [NETWORK   ] $sats sats — matches cache, no change")
-                        else         -> Timber.d("BALANCE [NETWORK   ] $sats sats — was $prev sats (diff ${sats - prev})")
+                    when (val prev = (_balanceState.value as? BalanceState.Success)?.sats) {
+                        null -> Timber.d("BALANCE [NETWORK   ] $sats sats — cold load complete")
+                        sats -> Timber.d("BALANCE [NETWORK   ] $sats sats — matches cache, no change")
+                        else -> Timber.d("BALANCE [NETWORK   ] $sats sats — was $prev sats (diff ${sats - prev})")
                     }
                     _balanceState.value = BalanceState.Success(
                         sats         = sats,

app/src/main/java/com/bitcointxoko/gudariwallet/ui/common/AmountWithFiatColumn.kt

@@ -0,0 +1,41 @@
+package com.bitcointxoko.gudariwallet.ui.common
+
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.height
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.unit.dp
+
+@Composable
+internal fun AmountWithFiatColumn(
+    amountSat          : Long,
+    isOutgoing         : Boolean,
+    amountColor        : Color,
+    fiatLine           : String?,
+    style              : TextStyle = MaterialTheme.typography.bodyMedium,
+    horizontalAlignment: Alignment.Horizontal = Alignment.End
+) {
+    val prefix = if (isOutgoing) "−" else "+"
+    Column(horizontalAlignment = horizontalAlignment) {
+        Text(
+            text  = "$prefix$amountSat sats",
+            style = style.copy(fontFamily = FontFamily.Monospace),
+            color = amountColor
+        )
+        if (fiatLine != null) {
+            Spacer(Modifier.height(if (horizontalAlignment == Alignment.CenterHorizontally) 4.dp else 1.dp))
+            Text(
+                text  = fiatLine,
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.75f)
+            )
+        }
+    }
+}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/common/BrightnessController.kt

@@ -0,0 +1,41 @@
+package com.bitcointxoko.gudariwallet.ui.common
+
+import android.view.WindowManager
+import androidx.activity.compose.LocalActivity
+import androidx.compose.runtime.*
+
+/**
+ * Manages screen brightness for QR-display screens.
+ * Returns a [BrightnessController] with [isOn] state and a [toggle] callback.
+ * Restores system brightness unconditionally when it leaves composition.
+ */
+@Composable
+fun rememberBrightnessController(): BrightnessController {
+    val window = (LocalActivity.current)?.window
+    var isOn by remember { mutableStateOf(false) }
+
+    // Sync side effect: no coroutine needed
+    SideEffect {
+        window?.attributes = window.attributes?.apply {
+            screenBrightness = if (isOn) WindowManager.LayoutParams.BRIGHTNESS_OVERRIDE_FULL
+            else      WindowManager.LayoutParams.BRIGHTNESS_OVERRIDE_NONE
+        }
+    }
+
+    DisposableEffect(Unit) {
+        onDispose {
+            window?.attributes = window.attributes?.apply {
+                screenBrightness = WindowManager.LayoutParams.BRIGHTNESS_OVERRIDE_NONE
+            }
+        }
+    }
+
+    // No remember needed — BrightnessController is a tiny data class,
+    // and this composable already recomposes only when isOn changes.
+    return BrightnessController(isOn = isOn, toggle = { isOn = !isOn })
+}
+
+data class BrightnessController(
+    val isOn   : Boolean,
+    val toggle : () -> Unit
+)

app/src/main/java/com/bitcointxoko/gudariwallet/ui/common/CopyIconButton.kt

@@ -0,0 +1,48 @@
+package com.bitcointxoko.gudariwallet.ui.common
+
+import android.content.ClipData
+import androidx.compose.foundation.layout.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.outlined.ContentCopy
+import androidx.compose.material3.*
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.ClipEntry
+import androidx.compose.ui.platform.LocalClipboard
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.dp
+import kotlinx.coroutines.launch
+import androidx.compose.runtime.rememberCoroutineScope
+
+/**
+ * A small icon button that copies [value] to the clipboard under [label].
+ */
+@Composable
+fun CopyIconButton(
+    label    : String,
+    value    : String,
+    size     : Dp = 32.dp,
+    iconSize : Dp = 16.dp,
+    tint     : Color = Color.Unspecified
+) {
+    val clipboard = LocalClipboard.current
+    val scope     = rememberCoroutineScope()
+    IconButton(
+        onClick  = {
+            scope.launch {
+                clipboard.setClipEntry(ClipEntry(ClipData.newPlainText(label, value)))
+            }
+        },
+        modifier = Modifier.size(size)
+    ) {
+        Icon(
+            imageVector        = Icons.Outlined.ContentCopy,
+            contentDescription = "Copy $label",
+            modifier           = Modifier.size(iconSize),
+            tint               = if (tint == Color.Unspecified)
+                MaterialTheme.colorScheme.onSurfaceVariant
+            else tint
+        )
+    }
+}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/common/DetailRow.kt

@@ -0,0 +1,93 @@
+package com.bitcointxoko.gudariwallet.ui.common
+
+import androidx.compose.runtime.Composable
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.outlined.ContentCopy
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.style.TextDecoration
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+
+@Composable
+fun DetailRow(
+    label          : String,
+    value          : String,
+    subtitle       : String?                   = null,   // ← from components
+    monospace      : Boolean                   = false,  // ← from history
+    copyable       : Boolean                   = false,  // ← from history
+    onCopy         : (() -> Unit)?             = null,   // ← from history
+    maxLines       : Int                       = Int.MAX_VALUE,
+    valueColor     : Color                     = Color.Unspecified,
+    textDecoration : TextDecoration?           = null,
+    onValueClick   : (() -> Unit)?             = null,
+    trailingContent: (@Composable () -> Unit)? = null
+) {
+    val baseStyle = MaterialTheme.typography.bodySmall
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .then(if (copyable && onCopy != null) Modifier.clickable(onClick = onCopy) else Modifier)
+            .padding(vertical = 6.dp),
+        horizontalArrangement = Arrangement.SpaceBetween,
+        verticalAlignment     = Alignment.Top
+    ) {
+        Text(
+            text     = label,
+            style    = baseStyle,
+            color    = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.weight(0.35f)
+        )
+        Spacer(Modifier.width(8.dp))
+        Row(
+            modifier          = Modifier.weight(0.65f),
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Column(modifier = Modifier.weight(1f, fill = false)) {
+                Text(
+                    text     = value,
+                    style    = baseStyle.copy(
+                        fontFamily     = if (monospace) FontFamily.Monospace else FontFamily.Default,
+                        textDecoration = textDecoration
+                    ),
+                    color    = valueColor,
+                    maxLines = maxLines,
+                    overflow = TextOverflow.Ellipsis,
+                    modifier = if (onValueClick != null) Modifier.clickable(onClick = onValueClick)
+                    else Modifier
+                )
+                if (subtitle != null) {
+                    Text(
+                        text  = subtitle,
+                        style = MaterialTheme.typography.labelSmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant
+                    )
+                }
+            }
+            if (copyable) {
+                Spacer(Modifier.width(4.dp))
+                Icon(
+                    imageVector        = Icons.Outlined.ContentCopy,
+                    contentDescription = "Copy $label",
+                    modifier           = Modifier.size(14.dp),
+                    tint               = MaterialTheme.colorScheme.onSurfaceVariant
+                )
+            }
+            trailingContent?.invoke()
+        }
+    }
+}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/common/DetailSection.kt

@@ -0,0 +1,32 @@
+package com.bitcointxoko.gudariwallet.ui.common
+
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.ColumnScope
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.Card
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+
+@Composable
+fun DetailSection(
+    title  : String,
+    content: @Composable ColumnScope.() -> Unit
+) {
+    Card(modifier = Modifier.fillMaxWidth()) {
+        Column(modifier = Modifier.padding(16.dp)) {
+            Text(
+                text  = title,
+                style = MaterialTheme.typography.titleSmall,
+                color = MaterialTheme.colorScheme.primary
+            )
+            Spacer(Modifier.height(12.dp))
+            content()
+        }
+    }
+}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/common/QrDisplayCard.kt

@@ -1,4 +1,4 @@
-package com.bitcointxoko.gudariwallet.ui.receive
+package com.bitcointxoko.gudariwallet.ui.common
 
 import android.content.ClipData
 import android.graphics.Bitmap
@@ -12,6 +12,7 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.OpenInNew
 import androidx.compose.material.icons.filled.ContentCopy
 import androidx.compose.material.icons.filled.Nfc
 import androidx.compose.material.icons.filled.Share
@@ -55,6 +56,22 @@ import kotlinx.coroutines.launch
  * @param onToggleNfc        Called when the NFC button is tapped.
  * @param nfcEnabled         Whether the NFC button should be interactive (e.g. false when invoice expired).
  */
+/**
+ * QR image followed by Share / Copy / Brightness / NFC / Open-in-app icon-button row.
+ *
+ * @param content            What to encode into the QR code.
+ * @param contentDescription Accessibility label for the QR image.
+ * @param clipLabel          Label used when writing to the clipboard.
+ * @param shareTitle         Chooser title for the share intent.
+ * @param textToCopy         The raw string placed on the clipboard and shared.
+ * @param brightnessOn       Current brightness-boost state.
+ * @param onToggleBrightness Called when the brightness button is tapped.
+ * @param isNfcEmulating     Current NFC emulation state (null = hide NFC button).
+ * @param onToggleNfc        Called when the NFC button is tapped.
+ * @param nfcEnabled         Whether the NFC button should be interactive.
+ * @param onOpenUri          When non-null, shows an "Open in app" icon button that
+ *                           fires this callback. Pass null (default) to hide it.
+ */
 @Composable
 internal fun QrDisplayCard(
     modifier             : Modifier = Modifier,
@@ -65,9 +82,10 @@ internal fun QrDisplayCard(
     textToCopy           : String,
     brightnessOn         : Boolean,
     onToggleBrightness   : () -> Unit,
-    isNfcEmulating       : Boolean? = null,   // null → no NFC button shown
+    isNfcEmulating       : Boolean? = null,
     onToggleNfc          : (() -> Unit)? = null,
     nfcEnabled           : Boolean = true,
+    onOpenUri            : (() -> Unit)? = null,   // ← NEW
     qrModifier           : Modifier = Modifier.size(260.dp)
 ) {
     val strings   = LocalAppStrings.current
@@ -91,7 +109,7 @@ internal fun QrDisplayCard(
                 .clip(RoundedCornerShape(12.dp))
         )
 
-        // ── Action row: Share | Copy | Brightness | NFC ───────────────────────
+        // ── Action row: Share | Copy | Brightness | NFC | Open ────────────────
         Row(
             modifier              = Modifier.fillMaxWidth(),
             horizontalArrangement = Arrangement.spacedBy(8.dp, Alignment.CenterHorizontally),
@@ -103,7 +121,7 @@ internal fun QrDisplayCard(
             ) {
                 Icon(
                     imageVector        = Icons.Filled.Share,
-                    contentDescription = strings.qrShare,                      // ← "Share"
+                    contentDescription = strings.receive.qrShare,
                     tint               = MaterialTheme.colorScheme.onSurfaceVariant
                 )
             }
@@ -120,7 +138,7 @@ internal fun QrDisplayCard(
             ) {
                 Icon(
                     imageVector        = Icons.Filled.ContentCopy,
-                    contentDescription = strings.qrCopy,                       // ← "Copy"
+                    contentDescription = strings.receive.qrCopy,
                     tint               = MaterialTheme.colorScheme.onSurfaceVariant
                 )
             }
@@ -129,8 +147,8 @@ internal fun QrDisplayCard(
             FilledTonalIconButton(onClick = onToggleBrightness) {
                 Icon(
                     imageVector        = Icons.Filled.WbSunny,
-                    contentDescription = if (brightnessOn) strings.brightnessReduce  // ← "Reduce brightness"
-                    else              strings.brightnessBoost,   // ← "Boost brightness"
+                    contentDescription = if (brightnessOn) strings.receive.brightnessReduce
+                    else              strings.receive.brightnessBoost,
                     tint               = if (brightnessOn) MaterialTheme.colorScheme.primary
                     else              MaterialTheme.colorScheme.onSurfaceVariant
                 )
@@ -145,17 +163,29 @@ internal fun QrDisplayCard(
                     Icon(
                         imageVector        = if (isNfcEmulating) Icons.Filled.Nfc
                         else                Icons.Outlined.Nfc,
-                        contentDescription = if (isNfcEmulating) strings.qrNfcStop   // ← "Stop NFC sharing"
-                        else                 strings.qrNfcStart, // ← "Share via NFC"
+                        contentDescription = if (isNfcEmulating) strings.receive.qrNfcStop
+                        else                 strings.receive.qrNfcStart,
                         tint               = if (isNfcEmulating) MaterialTheme.colorScheme.primary
                         else                 MaterialTheme.colorScheme.onSurfaceVariant
                     )
                 }
             }
+
+            // Open in app — only shown when caller passes onOpenUri
+            if (onOpenUri != null) {
+                IconButton(onClick = onOpenUri) {
+                    Icon(
+                        imageVector        = Icons.AutoMirrored.Filled.OpenInNew,
+                        contentDescription = strings.receive.openInApp,
+                        tint               = MaterialTheme.colorScheme.onSurfaceVariant
+                    )
+                }
+            }
         }
     }
 }
 
+
 // ── QR generation ─────────────────────────────────────────────────────────────
 
 private const val QR_BITMAP_SIZE = 512

app/src/main/java/com/bitcointxoko/gudariwallet/ui/common/StatusChip.kt

@@ -0,0 +1,53 @@
+package com.bitcointxoko.gudariwallet.ui.common
+
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.unit.dp
+import com.bitcointxoko.gudariwallet.LocalAppStrings
+import com.bitcointxoko.gudariwallet.ui.theme.semanticColors
+
+@Composable
+internal fun StatusChip(status: String) {
+    val semantic = semanticColors()
+    val strings  = LocalAppStrings.current
+
+    data class ChipStyle(
+        val containerColor: Color,
+        val contentColor:   Color,
+        val label:          String,
+    )
+
+    val style = when (status.lowercase()) {
+        "success", "complete", "paid"      -> ChipStyle(
+            semantic.successContainer, semantic.onSuccessContainer, strings.history.statusSuccess
+        )
+        "pending", "in_flight", "inflight" -> ChipStyle(
+            semantic.warningContainer, semantic.onWarningContainer, strings.history.statusPending
+        )
+        "failed", "error", "expired"       -> ChipStyle(
+            semantic.errorContainer, semantic.onErrorContainer, strings.history.statusFailed
+        )
+        else -> ChipStyle(
+            MaterialTheme.colorScheme.surfaceVariant,
+            MaterialTheme.colorScheme.onSurfaceVariant,
+            strings.history.statusUnknown,
+        )
+    }
+
+    Surface(
+        shape        = MaterialTheme.shapes.small,
+        color        = style.containerColor,
+        contentColor = style.contentColor,
+    ) {
+        Text(
+            text     = style.label,
+            style    = MaterialTheme.typography.labelSmall,
+            modifier = Modifier.padding(horizontal = 10.dp, vertical = 4.dp)
+        )
+    }
+}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/common/UnitWheelPicker.kt

@@ -1,4 +1,4 @@
-package com.bitcointxoko.gudariwallet.ui.components
+package com.bitcointxoko.gudariwallet.ui.common
 
 import androidx.compose.foundation.ExperimentalFoundationApi
 import androidx.compose.foundation.gestures.snapping.rememberSnapFlingBehavior

app/src/main/java/com/bitcointxoko/gudariwallet/ui/components/CommonComponents.kt

@@ -1,106 +0,0 @@
-package com.bitcointxoko.gudariwallet.ui.components
-
-import android.content.ClipData
-import androidx.compose.foundation.clickable
-import androidx.compose.foundation.layout.*
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.outlined.ContentCopy
-import androidx.compose.material3.*
-import androidx.compose.runtime.Composable
-import androidx.compose.ui.Alignment
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.platform.ClipEntry
-import androidx.compose.ui.platform.LocalClipboard
-import androidx.compose.ui.text.style.TextDecoration
-import androidx.compose.ui.text.style.TextOverflow
-import androidx.compose.ui.unit.Dp
-import androidx.compose.ui.unit.dp
-import kotlinx.coroutines.launch
-import androidx.compose.runtime.rememberCoroutineScope
-
-/**
- * A two-column label/value row used throughout the send flow.
- */
-@Composable
-fun DetailRow(
-    label          : String,
-    value          : String,
-    subtitle       : String?                   = null,
-    valueColor     : Color                     = Color.Unspecified,
-    textDecoration : TextDecoration?           = null,
-    onValueClick   : (() -> Unit)?             = null,
-    trailingContent: (@Composable () -> Unit)? = null
-) {
-    Row(
-        modifier              = Modifier
-            .fillMaxWidth()
-            .padding(vertical = 4.dp),
-        horizontalArrangement = Arrangement.SpaceBetween,
-        verticalAlignment     = Alignment.CenterVertically
-    ) {
-        Text(
-            text     = label,
-            color    = MaterialTheme.colorScheme.onSurfaceVariant,
-            modifier = Modifier.weight(0.35f)
-        )
-        Row(
-            modifier          = Modifier
-                .weight(0.65f)
-                .padding(start = 8.dp),
-            verticalAlignment = Alignment.CenterVertically
-        ) {
-            Column(modifier = Modifier.weight(1f, fill = false)) {
-                Text(
-                    text     = value,
-                    maxLines = 1,
-                    overflow = TextOverflow.Ellipsis,
-                    color    = valueColor,
-                    style    = LocalTextStyle.current.copy(textDecoration = textDecoration),
-                    modifier = if (onValueClick != null) Modifier.clickable(onClick = onValueClick)
-                    else Modifier
-                )
-                if (subtitle != null) {
-                    Text(
-                        text  = subtitle,
-                        style = MaterialTheme.typography.bodySmall,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant
-                    )
-                }
-            }
-            trailingContent?.invoke()
-        }
-    }
-}
-
-/**
- * A small icon button that copies [value] to the clipboard under [label].
- */
-@Composable
-fun CopyIconButton(
-    label    : String,
-    value    : String,
-    size     : Dp = 32.dp,
-    iconSize : Dp = 16.dp,
-    tint     : Color = Color.Unspecified
-) {
-    val clipboard = LocalClipboard.current
-    val scope     = rememberCoroutineScope()
-    IconButton(
-        onClick  = {
-            scope.launch {
-                clipboard.setClipEntry(ClipEntry(ClipData.newPlainText(label, value)))
-            }
-        },
-        modifier = Modifier.size(size)
-    ) {
-        Icon(
-            imageVector        = Icons.Outlined.ContentCopy,
-            contentDescription = "Copy $label",
-            modifier           = Modifier.size(iconSize),
-            tint               = if (tint == Color.Unspecified)
-                MaterialTheme.colorScheme.onSurfaceVariant
-            else tint
-        )
-    }
-}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/contacts/ContactDetailScreen.kt

@@ -0,0 +1,642 @@
+package com.bitcointxoko.gudariwallet.ui.contacts
+
+import androidx.compose.foundation.BorderStroke
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.text.KeyboardActions
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.Add
+import androidx.compose.material.icons.filled.Delete
+import androidx.compose.material.icons.filled.Edit
+import androidx.compose.material.icons.outlined.Star
+import androidx.compose.material.icons.filled.Star
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.focus.FocusRequester
+import androidx.compose.ui.focus.focusRequester
+import androidx.compose.ui.platform.LocalFocusManager
+import androidx.compose.ui.text.input.ImeAction
+import androidx.compose.ui.text.input.KeyboardCapitalization
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.bitcointxoko.gudariwallet.LocalAppStrings
+import com.bitcointxoko.gudariwallet.data.db.PaymentAddressEntity
+import com.bitcointxoko.gudariwallet.data.db.PaymentAddressType
+import com.bitcointxoko.gudariwallet.ui.common.CopyIconButton
+import com.bitcointxoko.gudariwallet.ui.common.DetailRow
+import com.bitcointxoko.gudariwallet.ui.common.DetailSection
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun ContactDetailScreen(
+    viewModel: ContactDetailViewModel,
+    onBack: () -> Unit
+) {
+    val strings = LocalAppStrings.current
+    val uiState by viewModel.uiState.collectAsStateWithLifecycle()
+    val pendingDelete by viewModel.pendingDelete.collectAsStateWithLifecycle()
+    val showAddAddressSheet by viewModel.showAddAddressSheet.collectAsStateWithLifecycle()
+    val showEditAliasSheet by viewModel.showEditAliasSheet.collectAsStateWithLifecycle()
+
+    var isEditing by remember { mutableStateOf(false) }
+    var pendingAddressDelete by remember { mutableStateOf<String?>(null) }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = {
+                    val title = when (val s = uiState) {
+                        is ContactDetailUiState.Success ->
+                            s.data.contact.localAlias
+                                ?: s.data.contact.displayName
+                                ?: s.data.contact.name
+                                ?: "Contact"
+                        else -> "Contact"
+                    }
+                    Text(title, maxLines = 1, overflow = TextOverflow.Ellipsis)
+                },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(
+                            Icons.AutoMirrored.Filled.ArrowBack,
+                            contentDescription = strings.back
+                        )
+                    }
+                },
+                actions = {
+                    if (uiState is ContactDetailUiState.Success) {
+                        if (isEditing) {
+                            // Done button exits edit mode
+                            TextButton(onClick = { isEditing = false }) {
+                                Text("Done")
+                            }
+                        } else {
+                            // Edit button opens edit mode
+                            IconButton(onClick = { isEditing = true }) {
+                                Icon(Icons.Default.Edit, contentDescription = "Edit contact")
+                            }
+                        }
+                    }
+                }
+            )
+        },
+        floatingActionButton = {
+            // FAB only visible in edit mode so users don't accidentally add
+            // addresses while browsing
+            if (uiState is ContactDetailUiState.Success && isEditing) {
+                FloatingActionButton(onClick = { viewModel.openAddAddressSheet() }) {
+                    Icon(Icons.Default.Add, contentDescription = "Add payment address")
+                }
+            }
+        }
+    ) { innerPadding ->
+        when (val state = uiState) {
+            is ContactDetailUiState.Loading -> {
+                Box(
+                    Modifier
+                        .fillMaxSize()
+                        .padding(innerPadding),
+                    contentAlignment = Alignment.Center
+                ) { CircularProgressIndicator() }
+            }
+
+            is ContactDetailUiState.NotFound -> {
+                Box(
+                    Modifier
+                        .fillMaxSize()
+                        .padding(innerPadding),
+                    contentAlignment = Alignment.Center
+                ) {
+                    Text(
+                        "Contact not found",
+                        color = MaterialTheme.colorScheme.onSurfaceVariant
+                    )
+                }
+            }
+
+            is ContactDetailUiState.Success -> {
+                ContactDetailContent(
+                    state = state,
+                    isEditing = isEditing,
+                    onRemoveAddress = { addressId -> pendingAddressDelete = addressId },
+                    onSetDefault = { viewModel.setDefaultAddress(it) },
+                    onEditAlias = { viewModel.openEditAliasSheet() },
+                    onDeleteContact = { viewModel.requestDelete() },
+                    modifier = Modifier.padding(innerPadding)
+                )
+            }
+        }
+    }
+
+    // ── Delete confirmation dialog — mirrors NwcScreen pattern ────────────
+    if (pendingDelete) {
+        AlertDialog(
+            onDismissRequest = { viewModel.cancelDelete() },
+            title = { Text("Delete contact") },
+            text = { Text("This contact and all their addresses will be permanently removed.") },
+            confirmButton = {
+                TextButton(onClick = { viewModel.confirmDelete(onDeleted = onBack) }) {
+                    Text("Delete", color = MaterialTheme.colorScheme.error)
+                }
+            },
+            dismissButton = {
+                TextButton(onClick = { viewModel.cancelDelete() }) {
+                    Text(strings.cancel)
+                }
+            }
+        )
+    }
+
+    pendingAddressDelete?.let { addressId ->
+        AlertDialog(
+            onDismissRequest = { pendingAddressDelete = null },
+            title = { Text("Remove address") },
+            text = { Text("This payment address will be permanently removed from the contact.") },
+            confirmButton = {
+                TextButton(onClick = {
+                    viewModel.removeAddress(addressId)
+                    pendingAddressDelete = null
+                }) {
+                    Text("Remove", color = MaterialTheme.colorScheme.error)
+                }
+            },
+            dismissButton = {
+                TextButton(onClick = { pendingAddressDelete = null }) {
+                    Text(strings.cancel)
+                }
+            }
+        )
+    }
+
+    // ── Add address sheet ─────────────────────────────────────────────────
+    if (showAddAddressSheet) {
+        AddAddressSheet(
+            onSave = { type, address, label, makeDefault ->
+                viewModel.addAddress(type, address, label, makeDefault)
+                viewModel.closeAddAddressSheet()
+            },
+            onDismiss = { viewModel.closeAddAddressSheet() }
+        )
+    }
+
+    // ── Edit alias sheet ──────────────────────────────────────────────────
+    if (showEditAliasSheet) {
+        val currentAlias = (uiState as? ContactDetailUiState.Success)
+            ?.data?.contact?.localAlias ?: ""
+        EditAliasSheet(
+            currentAlias = currentAlias,
+            onSave = { newAlias ->
+                viewModel.updateAlias(newAlias)
+                viewModel.closeEditAliasSheet()
+            },
+            onDismiss = { viewModel.closeEditAliasSheet() }
+        )
+    }
+}
+
+// ── Main content ───────────────────────────────────────────────────────────────
+
+@Composable
+private fun ContactDetailContent(
+    state: ContactDetailUiState.Success,
+    isEditing: Boolean,
+    onRemoveAddress: (addressId: String) -> Unit,
+    onSetDefault: (PaymentAddressEntity) -> Unit,
+    onEditAlias: () -> Unit,
+    onDeleteContact: () -> Unit,
+    modifier: Modifier = Modifier
+) {
+    val contact = state.data.contact
+    val addresses = state.data.addresses
+
+    LazyColumn(
+        modifier = modifier.fillMaxSize(),
+        contentPadding = PaddingValues(bottom = 88.dp) // FAB clearance
+    ) {
+        // ── Avatar + name hero ─────────────────────────────────────────────
+        item {
+            Column(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(vertical = 24.dp),
+                horizontalAlignment = Alignment.CenterHorizontally
+            ) {
+                val displayName = contact.localAlias
+                    ?: contact.displayName
+                    ?: contact.name
+                    ?: "?"
+
+                Surface(
+                    shape = MaterialTheme.shapes.extraLarge,
+                    color = MaterialTheme.colorScheme.secondaryContainer,
+                    modifier = Modifier.size(72.dp)
+                ) {
+                    Box(contentAlignment = Alignment.Center) {
+                        Text(
+                            text = displayName.first().uppercaseChar().toString(),
+                            style = MaterialTheme.typography.headlineMedium,
+                            color = MaterialTheme.colorScheme.onSecondaryContainer
+                        )
+                    }
+                }
+                Spacer(Modifier.height(12.dp))
+                Text(
+                    text = displayName,
+                    style = MaterialTheme.typography.titleLarge
+                )
+                contact.nip05?.let { nip05 ->
+                    Text(
+                        text = nip05,
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant
+                    )
+                }
+            }
+        }
+
+        // ── Payment addresses section ─────────────────────────────────────
+        item {
+            DetailSection(title = "Payment addresses") {
+                if (addresses.isEmpty()) {
+                    Text(
+                        text = "No addresses added yet",
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                } else {
+                    Column(verticalArrangement = Arrangement.spacedBy(0.dp)) {
+                        addresses.forEachIndexed { index, addr ->
+                            AddressRow(
+                                address = addr,
+                                isEditing = isEditing,
+                                onRemove = { onRemoveAddress(addr.id) },
+                                onSetDefault = { onSetDefault(addr) }
+                            )
+                            if (index < addresses.lastIndex) {
+                                HorizontalDivider(
+                                    color = MaterialTheme.colorScheme.outlineVariant,
+                                    thickness = 0.5.dp
+                                )
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        // ── Notes / about (nostr-sourced, read-only for now) ─────────────
+        contact.about?.let { about ->
+            item {
+                DetailSection(title = "About") {
+                    DetailRow(label = "Bio", value = about, maxLines = 4)
+                }
+            }
+        }
+
+        // ── Destructive actions (edit mode only) ─────────────────────────
+        if (isEditing) {
+            item {
+                Column(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(horizontal = 16.dp, vertical = 8.dp),
+                    verticalArrangement = Arrangement.spacedBy(8.dp)
+                ) {
+                    OutlinedButton(
+                        onClick = onEditAlias,
+                        modifier = Modifier.fillMaxWidth()
+                    ) {
+                        Icon(
+                            Icons.Default.Edit,
+                            contentDescription = null,
+                            modifier = Modifier.size(18.dp)
+                        )
+                        Spacer(Modifier.width(8.dp))
+                        Text("Edit name")
+                    }
+                    OutlinedButton(
+                        onClick = onDeleteContact,
+                        modifier = Modifier.fillMaxWidth(),
+                        colors = ButtonDefaults.outlinedButtonColors(
+                            contentColor = MaterialTheme.colorScheme.error
+                        ),
+                        border = BorderStroke(1.dp, MaterialTheme.colorScheme.error)
+                    ) {
+                        Icon(
+                            Icons.Default.Delete,
+                            contentDescription = null,
+                            modifier = Modifier.size(18.dp)
+                        )
+                        Spacer(Modifier.width(8.dp))
+                        Text("Delete contact")
+                    }
+                }
+            }
+        }
+    }
+}
+
+// ── Address row ────────────────────────────────────────────────────────────────
+
+@Composable
+private fun AddressRow(
+    address: PaymentAddressEntity,
+    isEditing: Boolean,
+    onRemove: () -> Unit,
+    onSetDefault: () -> Unit,
+) {
+    val typeLabel = when (address.type) {
+        PaymentAddressType.LIGHTNING_ADDRESS.name -> "Lightning Address"
+        PaymentAddressType.LNURL.name             -> "LNURL"
+        PaymentAddressType.ON_CHAIN.name          -> "On-chain"
+        PaymentAddressType.SILENT_PAYMENT.name    -> "Silent Payment"
+        PaymentAddressType.BOLT12_OFFER.name      -> "BOLT 12 Offer"
+        PaymentAddressType.BIP353.name            -> "BIP-353"
+        else                                      -> address.type
+    }
+
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .padding(vertical = 12.dp),
+        verticalAlignment = Alignment.CenterVertically
+    ) {
+        // ── Label + value ─────────────────────────────────────────────
+        Column(modifier = Modifier.weight(1f)) {
+            Row(
+                verticalAlignment = Alignment.CenterVertically,
+                horizontalArrangement = Arrangement.spacedBy(4.dp)
+            ) {
+                Text(
+                    text = typeLabel,
+                    style = MaterialTheme.typography.labelMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant
+                )
+                address.label?.let { lbl ->
+                    Text(
+                        text = "· $lbl",
+                        style = MaterialTheme.typography.labelMedium,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant
+                    )
+                }
+                if (address.isDefault) {
+                    SuggestionChip(
+                        onClick = {},
+                        label = {
+                            Text(
+                                "default",
+                                style = MaterialTheme.typography.labelSmall
+                            )
+                        },
+                        modifier = Modifier.height(20.dp)
+                    )
+                }
+            }
+            Text(
+                text = address.address,
+                style = MaterialTheme.typography.bodyMedium,
+                maxLines = 1,
+                overflow = TextOverflow.Ellipsis
+            )
+        }
+
+        // ── Trailing actions ──────────────────────────────────────────
+        Row(horizontalArrangement = Arrangement.spacedBy(0.dp)) {
+            // Copy always available
+            CopyIconButton(
+                label = "Copy address",
+                value = address.address,
+                size = 36.dp
+            )
+            // Star + delete only in edit mode
+            if (isEditing) {
+                IconButton(
+                    onClick = onSetDefault,
+                    modifier = Modifier.size(36.dp)
+                ) {
+                    Icon(
+                        imageVector = if (address.isDefault) Icons.Filled.Star
+                        else Icons.Outlined.Star,
+                        contentDescription = if (address.isDefault) "Default address"
+                        else "Set as default",
+                        modifier = Modifier.size(18.dp),
+                        tint = if (address.isDefault) MaterialTheme.colorScheme.primary
+                        else MaterialTheme.colorScheme.onSurfaceVariant
+                    )
+                }
+                IconButton(
+                    onClick = onRemove,
+                    modifier = Modifier.size(36.dp)
+                ) {
+                    Icon(
+                        imageVector = Icons.Default.Delete,
+                        contentDescription = "Remove address",
+                        modifier = Modifier.size(18.dp),
+                        tint = MaterialTheme.colorScheme.error
+                    )
+                }
+            }
+        }
+    }
+}
+
+
+
+
+// ── Add address sheet ──────────────────────────────────────────────────────────
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+private fun AddAddressSheet(
+    onSave: (type: PaymentAddressType, address: String, label: String?, makeDefault: Boolean) -> Unit,
+    onDismiss: () -> Unit
+) {
+    val sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true)
+    val focusManager = LocalFocusManager.current
+    val addressFocus = remember { FocusRequester() }
+
+    var selectedType by remember { mutableStateOf(PaymentAddressType.LIGHTNING_ADDRESS) }
+    var address by remember { mutableStateOf("") }
+    var label by remember { mutableStateOf("") }
+    var makeDefault by remember { mutableStateOf(false) }
+
+    val canSave = address.isNotBlank()
+
+    LaunchedEffect(Unit) { addressFocus.requestFocus() }
+
+    ModalBottomSheet(
+        onDismissRequest = onDismiss,
+        sheetState = sheetState
+    ) {
+        Column(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(horizontal = 24.dp)
+                .padding(bottom = 32.dp),
+            verticalArrangement = Arrangement.spacedBy(16.dp)
+        ) {
+            Text("Add payment address", style = MaterialTheme.typography.titleMedium)
+
+            // Type chips
+            Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                FilterChip(
+                    selected = selectedType == PaymentAddressType.LIGHTNING_ADDRESS,
+                    onClick  = { selectedType = PaymentAddressType.LIGHTNING_ADDRESS; address = "" },
+                    label    = { Text("Lightning Address") }
+                )
+                FilterChip(
+                    selected = selectedType == PaymentAddressType.LNURL,
+                    onClick  = { selectedType = PaymentAddressType.LNURL; address = "" },
+                    label    = { Text("LNURL") }
+                )
+            }
+
+            // Address field
+            val addressLabel = if (selectedType == PaymentAddressType.LIGHTNING_ADDRESS)
+                "Lightning Address" else "LNURL"
+            val addressPlaceholder = if (selectedType == PaymentAddressType.LIGHTNING_ADDRESS)
+                "user@domain.com" else "LNURL1..."
+
+            OutlinedTextField(
+                value = address,
+                onValueChange = { address = it },
+                label = { Text(addressLabel) },
+                placeholder = { Text(addressPlaceholder) },
+                singleLine = true,
+                keyboardOptions = KeyboardOptions(
+                    keyboardType = KeyboardType.Email,
+                    imeAction = ImeAction.Next,
+                    autoCorrectEnabled = false
+                ),
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .focusRequester(addressFocus)
+            )
+
+            // Optional label
+            OutlinedTextField(
+                value = label,
+                onValueChange = { label = it },
+                label = { Text("Label (optional)") },
+                placeholder = { Text("e.g. personal, savings") },
+                singleLine = true,
+                keyboardOptions = KeyboardOptions(
+                    capitalization = KeyboardCapitalization.Words,
+                    imeAction = ImeAction.Done
+                ),
+                keyboardActions = KeyboardActions(
+                    onDone = {
+                        focusManager.clearFocus()
+                        if (canSave) onSave(selectedType, address, label.takeIf { it.isNotBlank() }, makeDefault)
+                    }
+                ),
+                modifier = Modifier.fillMaxWidth()
+            )
+
+            // Set as default toggle
+            Row(
+                verticalAlignment = Alignment.CenterVertically,
+                horizontalArrangement = Arrangement.SpaceBetween,
+                modifier = Modifier.fillMaxWidth()
+            ) {
+                Text(
+                    text = "Set as default",
+                    style = MaterialTheme.typography.bodyMedium
+                )
+                Switch(
+                    checked = makeDefault,
+                    onCheckedChange = { makeDefault = it }
+                )
+            }
+
+            // Buttons
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.spacedBy(8.dp, Alignment.End)
+            ) {
+                val strings = LocalAppStrings.current
+                TextButton(onClick = onDismiss) { Text(strings.cancel) }
+                Button(
+                    onClick = {
+                        focusManager.clearFocus()
+                        onSave(selectedType, address, label.takeIf { it.isNotBlank() }, makeDefault)
+                    },
+                    enabled = canSave
+                ) { Text("Save") }
+            }
+        }
+    }
+}
+
+// ── Edit alias sheet ───────────────────────────────────────────────────────────
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+private fun EditAliasSheet(
+    currentAlias: String,
+    onSave: (String) -> Unit,
+    onDismiss: () -> Unit
+) {
+    val sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true)
+    val focusManager = LocalFocusManager.current
+    val focusRequester = remember { FocusRequester() }
+
+    var alias by remember { mutableStateOf(currentAlias) }
+    val canSave = alias.isNotBlank()
+
+    LaunchedEffect(Unit) { focusRequester.requestFocus() }
+
+    ModalBottomSheet(
+        onDismissRequest = onDismiss,
+        sheetState = sheetState
+    ) {
+        Column(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(horizontal = 24.dp)
+                .padding(bottom = 32.dp),
+            verticalArrangement = Arrangement.spacedBy(16.dp)
+        ) {
+            Text("Edit name", style = MaterialTheme.typography.titleMedium)
+
+            OutlinedTextField(
+                value = alias,
+                onValueChange = { alias = it },
+                label = { Text("Name") },
+                singleLine = true,
+                keyboardOptions = KeyboardOptions(
+                    capitalization = KeyboardCapitalization.Words,
+                    imeAction = ImeAction.Done
+                ),
+                keyboardActions = KeyboardActions(
+                    onDone = {
+                        focusManager.clearFocus()
+                        if (canSave) onSave(alias)
+                    }
+                ),
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .focusRequester(focusRequester)
+            )
+
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.spacedBy(8.dp, Alignment.End)
+            ) {
+                val strings = LocalAppStrings.current
+                TextButton(onClick = onDismiss) { Text(strings.cancel) }
+                Button(
+                    onClick = { focusManager.clearFocus(); onSave(alias) },
+                    enabled = canSave
+                ) { Text("Save") }
+            }
+        }
+    }
+}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/contacts/ContactDetailViewModel.kt

@@ -0,0 +1,111 @@
+package com.bitcointxoko.gudariwallet.ui.contacts
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.viewModelScope
+import com.bitcointxoko.gudariwallet.data.ContactRepository
+import com.bitcointxoko.gudariwallet.data.db.ContactWithAddresses
+import com.bitcointxoko.gudariwallet.data.db.PaymentAddressEntity
+import com.bitcointxoko.gudariwallet.data.db.PaymentAddressType
+import kotlinx.coroutines.flow.*
+import kotlinx.coroutines.launch
+
+sealed class ContactDetailUiState {
+    data object Loading : ContactDetailUiState()
+    data object NotFound : ContactDetailUiState()
+    data class Success(val data: ContactWithAddresses) : ContactDetailUiState()
+}
+
+class ContactDetailViewModel(
+    private val contactId: String,
+    private val repo: ContactRepository
+) : ViewModel() {
+
+    val uiState: StateFlow<ContactDetailUiState> = repo.observeContact(contactId)
+        .map { contact ->
+            if (contact == null) ContactDetailUiState.NotFound
+            else ContactDetailUiState.Success(contact)
+        }
+        .stateIn(
+            scope = viewModelScope,
+            started = SharingStarted.WhileSubscribed(5_000),
+            initialValue = ContactDetailUiState.Loading
+        )
+
+    // ── Delete contact ─────────────────────────────────────────────────────
+
+    private val _pendingDelete = MutableStateFlow(false)
+    val pendingDelete: StateFlow<Boolean> = _pendingDelete.asStateFlow()
+
+    fun requestDelete() { _pendingDelete.value = true }
+    fun cancelDelete()  { _pendingDelete.value = false }
+
+    fun confirmDelete(onDeleted: () -> Unit) {
+        viewModelScope.launch {
+            repo.deleteContact(contactId)
+            _pendingDelete.value = false
+            onDeleted()
+        }
+    }
+
+    // ── Edit alias ─────────────────────────────────────────────────────────
+
+    fun updateAlias(newAlias: String) {
+        viewModelScope.launch { repo.updateAlias(contactId, newAlias.trim()) }
+    }
+
+    // ── Payment addresses ──────────────────────────────────────────────────
+
+    fun addAddress(type: PaymentAddressType, address: String, label: String?, makeDefault: Boolean) {
+        viewModelScope.launch {
+            repo.addAddress(
+                contactId   = contactId,
+                type        = type,
+                address     = address.trim(),
+                label       = label?.trim()?.takeIf { it.isNotEmpty() },
+                makeDefault = makeDefault
+            )
+        }
+    }
+
+    fun removeAddress(addressId: String) {
+        viewModelScope.launch { repo.removeAddress(addressId) }
+    }
+
+    fun setDefaultAddress(address: PaymentAddressEntity) {
+        viewModelScope.launch {
+            repo.addAddress(
+                contactId   = contactId,
+                type        = PaymentAddressType.valueOf(address.type),
+                address     = address.address,
+                label       = address.label,
+                makeDefault = true
+            )
+        }
+    }
+
+    // ── Add address sheet state ────────────────────────────────────────────
+
+    private val _showAddAddressSheet = MutableStateFlow(false)
+    val showAddAddressSheet: StateFlow<Boolean> = _showAddAddressSheet.asStateFlow()
+
+    fun openAddAddressSheet()  { _showAddAddressSheet.value = true }
+    fun closeAddAddressSheet() { _showAddAddressSheet.value = false }
+
+    // ── Edit alias sheet state ─────────────────────────────────────────────
+
+    private val _showEditAliasSheet = MutableStateFlow(false)
+    val showEditAliasSheet: StateFlow<Boolean> = _showEditAliasSheet.asStateFlow()
+
+    fun openEditAliasSheet()  { _showEditAliasSheet.value = true }
+    fun closeEditAliasSheet() { _showEditAliasSheet.value = false }
+
+    class Factory(
+        private val contactId: String,
+        private val repo: ContactRepository
+    ) : ViewModelProvider.Factory {
+        @Suppress("UNCHECKED_CAST")
+        override fun <T : ViewModel> create(modelClass: Class<T>): T =
+            ContactDetailViewModel(contactId, repo) as T
+    }
+}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/contacts/ContactPickerSheet.kt

@@ -0,0 +1,151 @@
+package com.bitcointxoko.gudariwallet.ui.contacts
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Add
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.input.KeyboardCapitalization
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import com.bitcointxoko.gudariwallet.data.db.ContactWithAddresses
+import com.bitcointxoko.gudariwallet.data.db.PaymentAddressType
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun ContactPickerSheet(
+    contacts: List<ContactWithAddresses>,
+    onContactSelected: (contactId: String) -> Unit,
+    onCreateNew: () -> Unit,
+    onDismiss: () -> Unit
+) {
+    val sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true)
+    var search by remember { mutableStateOf("") }
+
+    val filtered = remember(contacts, search) {
+        if (search.isBlank()) contacts
+        else contacts.filter { c ->
+            val name = c.contact.localAlias
+                ?: c.contact.displayName
+                ?: c.contact.name
+                ?: ""
+            name.contains(search, ignoreCase = true)
+        }
+    }
+
+    ModalBottomSheet(
+        onDismissRequest = onDismiss,
+        sheetState = sheetState
+    ) {
+        Column(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(horizontal = 24.dp)
+                .padding(bottom = 32.dp),
+            verticalArrangement = Arrangement.spacedBy(12.dp)
+        ) {
+            Text("Assign contact", style = MaterialTheme.typography.titleMedium)
+
+            // Search field
+            OutlinedTextField(
+                value = search,
+                onValueChange = { search = it },
+                label = { Text("Search") },
+                placeholder = { Text("Contact name") },
+                singleLine = true,
+                keyboardOptions = KeyboardOptions(
+                    capitalization = KeyboardCapitalization.Words,
+                    keyboardType = KeyboardType.Text,
+                    autoCorrectEnabled = false
+                ),
+                modifier = Modifier.fillMaxWidth()
+            )
+
+            // Contact list
+            LazyColumn(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .heightIn(max = 320.dp),
+                contentPadding = PaddingValues(vertical = 4.dp)
+            ) {
+                items(filtered, key = { it.contact.id }) { item ->
+                    val displayName = item.contact.localAlias
+                        ?: item.contact.displayName
+                        ?: item.contact.name
+                        ?: "Unknown"
+
+                    ListItem(
+                        headlineContent = {
+                            Text(
+                                text = displayName,
+                                maxLines = 1,
+                                overflow = TextOverflow.Ellipsis
+                            )
+                        },
+                        supportingContent = item.addresses.firstOrNull()?.let { addr ->
+                            {
+                                Text(
+                                    text = addr.address,
+                                    style = MaterialTheme.typography.bodySmall,
+                                    maxLines = 1,
+                                    overflow = TextOverflow.Ellipsis
+                                )
+                            }
+                        },
+                        leadingContent = {
+                            Surface(
+                                shape = MaterialTheme.shapes.extraLarge,
+                                color = MaterialTheme.colorScheme.secondaryContainer,
+                                modifier = Modifier.size(36.dp)
+                            ) {
+                                Box(contentAlignment = Alignment.Center) {
+                                    Text(
+                                        text = displayName.first().uppercaseChar().toString(),
+                                        style = MaterialTheme.typography.titleSmall,
+                                        color = MaterialTheme.colorScheme.onSecondaryContainer
+                                    )
+                                }
+                            }
+                        },
+                        modifier = Modifier.clickable {
+                            onContactSelected(item.contact.id)
+                        }
+                    )
+                }
+
+                if (filtered.isEmpty() && search.isNotBlank()) {
+                    item {
+                        Text(
+                            text = "No contacts match \"$search\"",
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant,
+                            modifier = Modifier.padding(vertical = 8.dp)
+                        )
+                    }
+                }
+            }
+
+            // Create new contact button
+            HorizontalDivider()
+            TextButton(
+                onClick = onCreateNew,
+                modifier = Modifier.fillMaxWidth()
+            ) {
+                Icon(
+                    Icons.Default.Add,
+                    contentDescription = null,
+                    modifier = Modifier.size(18.dp)
+                )
+                Spacer(Modifier.width(6.dp))
+                Text("Create new contact")
+            }
+        }
+    }
+}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/contacts/ContactsScreen.kt

@@ -0,0 +1,196 @@
+package com.bitcointxoko.gudariwallet.ui.contacts
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.Add
+import androidx.compose.material.icons.filled.Person
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.bitcointxoko.gudariwallet.LocalAppStrings
+import com.bitcointxoko.gudariwallet.data.db.ContactWithAddresses
+import com.bitcointxoko.gudariwallet.data.db.PaymentAddressType
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun ContactsScreen(
+    viewModel: ContactsViewModel,
+    onContactClick: (contactId: String) -> Unit,
+    onBack: () -> Unit
+) {
+    val strings = LocalAppStrings.current
+    val uiState by viewModel.uiState.collectAsStateWithLifecycle()
+    var showCreateSheet by remember { mutableStateOf(false) }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text("Contacts") },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(
+                            Icons.AutoMirrored.Filled.ArrowBack,
+                            contentDescription = strings.back
+                        )
+                    }
+                }
+            )
+        },
+        floatingActionButton = {
+            FloatingActionButton(onClick = { showCreateSheet = true }) {
+                Icon(Icons.Default.Add, contentDescription = "Add contact")
+            }
+        }
+    ) { innerPadding ->
+        when (val state = uiState) {
+            is ContactsUiState.Loading -> {
+                Box(
+                    modifier = Modifier
+                        .fillMaxSize()
+                        .padding(innerPadding),
+                    contentAlignment = Alignment.Center
+                ) {
+                    CircularProgressIndicator()
+                }
+            }
+
+            is ContactsUiState.Success -> {
+                if (state.contacts.isEmpty()) {
+                    ContactsEmptyContent(
+                        onAdd = { showCreateSheet = true },
+                        modifier = Modifier
+                            .fillMaxSize()
+                            .padding(innerPadding)
+                    )
+                } else {
+                    LazyColumn(
+                        modifier = Modifier
+                            .fillMaxSize()
+                            .padding(innerPadding),
+                        contentPadding = PaddingValues(vertical = 8.dp)
+                    ) {
+                        items(state.contacts, key = { it.contact.id }) { item ->
+                            ContactRow(item, onClick = { onContactClick(item.contact.id) })
+                            HorizontalDivider(
+                                modifier = Modifier.padding(horizontal = 16.dp),
+                                thickness = 0.5.dp
+                            )
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    if (showCreateSheet) {
+        CreateContactSheet(
+            onSave = { name, addressType, address ->
+                viewModel.createContact(name, addressType, address)
+                showCreateSheet = false
+            },
+            onDismiss = { showCreateSheet = false }
+        )
+    }
+}
+
+// ── Empty state ────────────────────────────────────────────────────────────────
+
+@Composable
+private fun ContactsEmptyContent(
+    onAdd: () -> Unit,
+    modifier: Modifier = Modifier
+) {
+    Column(
+        modifier = modifier,
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center
+    ) {
+        Icon(
+            imageVector = Icons.Default.Person,
+            contentDescription = null,
+            modifier = Modifier.size(48.dp),
+            tint = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.4f)
+        )
+        Spacer(Modifier.height(12.dp))
+        Text(
+            text = "No contacts yet",
+            style = MaterialTheme.typography.bodyLarge,
+            color = MaterialTheme.colorScheme.onSurfaceVariant
+        )
+        Spacer(Modifier.height(4.dp))
+        Text(
+            text = "Tap + to add your first contact",
+            style = MaterialTheme.typography.bodySmall,
+            color = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.6f)
+        )
+        Spacer(Modifier.height(24.dp))
+        OutlinedButton(onClick = onAdd) {
+            Icon(Icons.Default.Add, contentDescription = null, modifier = Modifier.size(18.dp))
+            Spacer(Modifier.width(6.dp))
+            Text("Add contact")
+        }
+    }
+}
+
+// ── Contact row ────────────────────────────────────────────────────────────────
+
+@Composable
+private fun ContactRow(
+    item: ContactWithAddresses,
+    onClick: () -> Unit
+) {
+    val contact = item.contact
+    val displayName = contact.localAlias
+        ?: contact.displayName
+        ?: contact.name
+        ?: "Unknown"
+
+    val primaryAddress = item.addresses
+        .firstOrNull { it.isDefault }
+        ?: item.addresses.firstOrNull()
+
+    ListItem(
+        modifier = Modifier.clickable(onClick = onClick),
+        headlineContent = {
+            Text(
+                text = displayName,
+                maxLines = 1,
+                overflow = TextOverflow.Ellipsis
+            )
+        },
+        supportingContent = primaryAddress?.let { addr ->
+            {
+                Text(
+                    text = addr.address,
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    maxLines = 1,
+                    overflow = TextOverflow.Ellipsis
+                )
+            }
+        },
+        leadingContent = {
+            Surface(
+                shape = MaterialTheme.shapes.extraLarge,
+                color = MaterialTheme.colorScheme.secondaryContainer,
+                modifier = Modifier.size(40.dp)
+            ) {
+                Box(contentAlignment = Alignment.Center) {
+                    Text(
+                        text = displayName.first().uppercaseChar().toString(),
+                        style = MaterialTheme.typography.titleMedium,
+                        color = MaterialTheme.colorScheme.onSecondaryContainer
+                    )
+                }
+            }
+        }
+    )
+}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/contacts/ContactsViewModel.kt

@@ -0,0 +1,58 @@
+package com.bitcointxoko.gudariwallet.ui.contacts
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.viewModelScope
+import com.bitcointxoko.gudariwallet.data.ContactRepository
+import com.bitcointxoko.gudariwallet.data.db.ContactWithAddresses
+import com.bitcointxoko.gudariwallet.data.db.PaymentAddressType
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.stateIn
+import kotlinx.coroutines.launch
+
+sealed class ContactsUiState {
+    data object Loading : ContactsUiState()
+    data class Success(val contacts: List<ContactWithAddresses>) : ContactsUiState()
+}
+
+class ContactsViewModel(
+    private val repo: ContactRepository
+) : ViewModel() {
+
+    val uiState: StateFlow<ContactsUiState> = repo.observeAllContacts()
+        .map { ContactsUiState.Success(it) }
+        .stateIn(
+            scope = viewModelScope,
+            started = SharingStarted.WhileSubscribed(5_000),
+            initialValue = ContactsUiState.Loading
+        )
+
+    fun createContact(
+        name: String,
+        addressType: PaymentAddressType?,
+        address: String?
+    ) {
+        viewModelScope.launch {
+            val lnAddress = address?.takeIf { addressType == PaymentAddressType.LIGHTNING_ADDRESS }
+            repo.createContact(
+                localAlias = name.trim(),
+                lnAddress = lnAddress,
+                lnUrl = address?.takeIf { addressType == PaymentAddressType.LNURL },
+            )
+        }
+    }
+
+    fun deleteContact(id: String) {
+        viewModelScope.launch {
+            repo.deleteContact(id)
+        }
+    }
+
+    class Factory(private val repo: ContactRepository) : ViewModelProvider.Factory {
+        @Suppress("UNCHECKED_CAST")
+        override fun <T : ViewModel> create(modelClass: Class<T>): T =
+            ContactsViewModel(repo) as T
+    }
+}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/contacts/CreateContactSheet.kt

@@ -0,0 +1,160 @@
+package com.bitcointxoko.gudariwallet.ui.contacts
+
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.text.KeyboardActions
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.focus.FocusRequester
+import androidx.compose.ui.focus.focusRequester
+import androidx.compose.ui.platform.LocalFocusManager
+import androidx.compose.ui.text.input.ImeAction
+import androidx.compose.ui.text.input.KeyboardCapitalization
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.unit.dp
+import com.bitcointxoko.gudariwallet.LocalAppStrings
+import com.bitcointxoko.gudariwallet.data.db.PaymentAddressType
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun CreateContactSheet(
+    onSave: (name: String, addressType: PaymentAddressType?, address: String?) -> Unit,
+    onDismiss: () -> Unit,
+    initialAddressType: PaymentAddressType? = PaymentAddressType.LIGHTNING_ADDRESS,
+    initialAddress: String? = null
+) {
+    val strings = LocalAppStrings.current
+    val sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true)
+    val focusManager = LocalFocusManager.current
+
+    var name by remember { mutableStateOf("") }
+    var selectedType by remember { mutableStateOf(initialAddressType ?: PaymentAddressType.LIGHTNING_ADDRESS) }
+    var address      by remember { mutableStateOf(initialAddress ?: "") }
+
+    val nameFocus = remember { FocusRequester() }
+
+    val canSave = name.isNotBlank()
+
+    val addressLabel = when (selectedType) {
+        PaymentAddressType.LIGHTNING_ADDRESS -> "Lightning Address"
+        PaymentAddressType.LNURL -> "LNURL"
+        else -> "Address"
+    }
+    val addressPlaceholder = when (selectedType) {
+        PaymentAddressType.LIGHTNING_ADDRESS -> "user@domain.com"
+        PaymentAddressType.LNURL -> "LNURL1..."
+        else -> ""
+    }
+
+    LaunchedEffect(Unit) { nameFocus.requestFocus() }
+
+    ModalBottomSheet(
+        onDismissRequest = onDismiss,
+        sheetState = sheetState
+    ) {
+        Column(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(horizontal = 24.dp)
+                .padding(bottom = 32.dp),
+            verticalArrangement = Arrangement.spacedBy(16.dp)
+        ) {
+            Text(
+                text = "New contact",
+                style = MaterialTheme.typography.titleMedium
+            )
+
+            // Name field
+            OutlinedTextField(
+                value = name,
+                onValueChange = { name = it },
+                label = { Text("Name") },
+                placeholder = { Text("Contact name") },
+                singleLine = true,
+                keyboardOptions = KeyboardOptions(
+                    capitalization = KeyboardCapitalization.Words,
+                    imeAction = ImeAction.Next
+                ),
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .focusRequester(nameFocus)
+            )
+
+            // Address type toggle
+            Text(
+                text = "Payment address (optional)",
+                style = MaterialTheme.typography.labelMedium,
+                color = MaterialTheme.colorScheme.onSurfaceVariant
+            )
+            Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                FilterChip(
+                    selected = selectedType == PaymentAddressType.LIGHTNING_ADDRESS,
+                    onClick = {
+                        selectedType = PaymentAddressType.LIGHTNING_ADDRESS
+                        address = ""
+                    },
+                    label = { Text("Lightning Address") }
+                )
+                FilterChip(
+                    selected = selectedType == PaymentAddressType.LNURL,
+                    onClick = {
+                        selectedType = PaymentAddressType.LNURL
+                        address = ""
+                    },
+                    label = { Text("LNURL") }
+                )
+            }
+
+            // Address field
+            OutlinedTextField(
+                value = address,
+                onValueChange = { address = it },
+                label = { Text(addressLabel) },
+                placeholder = { Text(addressPlaceholder) },
+                singleLine = true,
+                keyboardOptions = KeyboardOptions(
+                    keyboardType = KeyboardType.Email,
+                    imeAction = ImeAction.Done,
+                    autoCorrectEnabled = false
+                ),
+                keyboardActions = KeyboardActions(
+                    onDone = {
+                        focusManager.clearFocus()
+                        if (canSave) {
+                            onSave(
+                                name.trim(),
+                                selectedType.takeIf { address.isNotBlank() },
+                                address.trim().takeIf { it.isNotEmpty() }
+                            )
+                        }
+                    }
+                ),
+                modifier = Modifier.fillMaxWidth()
+            )
+
+            // Buttons
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.spacedBy(8.dp, androidx.compose.ui.Alignment.End)
+            ) {
+                TextButton(onClick = onDismiss) {
+                    Text(strings.cancel)
+                }
+                Button(
+                    onClick = {
+                        focusManager.clearFocus()
+                        onSave(
+                            name.trim(),
+                            selectedType.takeIf { address.isNotBlank() },
+                            address.trim().takeIf { it.isNotEmpty() }
+                        )
+                    },
+                    enabled = canSave
+                ) {
+                    Text("Save")
+                }
+            }
+        }
+    }
+}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/fiat/FiatViewModel.kt

@@ -14,7 +14,6 @@ import com.bitcointxoko.gudariwallet.util.satsToFiat
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.StateFlow
-import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.flow.mapNotNull
 import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.launch

app/src/main/java/com/bitcointxoko/gudariwallet/ui/history/FilterBottomSheet.kt

@@ -32,6 +32,7 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.text.input.KeyboardType
 import androidx.compose.ui.unit.dp
 import com.bitcointxoko.gudariwallet.LocalAppStrings
+import com.bitcointxoko.gudariwallet.util.formatEpochShort
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -61,14 +62,14 @@ internal fun FilterBottomSheet(
         ) {
             // ── Sheet title ───────────────────────────────────────────────────
             Text(
-                text  = strings.filterSheetTitle,                              // ← "Filter payments"
+                text  = strings.history.filterSheetTitle,                              // ← "Filter payments"
                 style = MaterialTheme.typography.titleMedium
             )
             Spacer(Modifier.height(20.dp))
 
             // ── Direction ─────────────────────────────────────────────────────
             Text(
-                text  = strings.filterSectionDirection,                        // ← "Direction"
+                text  = strings.history.filterSectionDirection,                        // ← "Direction"
                 style = MaterialTheme.typography.labelMedium,
                 color = MaterialTheme.colorScheme.onSurfaceVariant
             )
@@ -76,9 +77,9 @@ internal fun FilterBottomSheet(
             Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
                 DirectionFilter.entries.forEach { option ->
                     val label = when (option) {
-                        DirectionFilter.ALL      -> strings.filterDirectionAll      // ← "All"
-                        DirectionFilter.OUTGOING -> strings.filterDirectionOutgoing // ← "Outgoing"
-                        DirectionFilter.INCOMING -> strings.filterDirectionIncoming // ← "Incoming"
+                        DirectionFilter.ALL      -> strings.history.filterDirectionAll      // ← "All"
+                        DirectionFilter.OUTGOING -> strings.history.filterDirectionOutgoing // ← "Outgoing"
+                        DirectionFilter.INCOMING -> strings.history.filterDirectionIncoming // ← "Incoming"
                     }
                     FilterChip(
                         selected = currentFilter.direction == option,
@@ -91,7 +92,7 @@ internal fun FilterBottomSheet(
 
             // ── Status ────────────────────────────────────────────────────────
             Text(
-                text  = strings.filterSectionStatus,                           // ← "Status"
+                text  = strings.history.filterSectionStatus,                           // ← "Status"
                 style = MaterialTheme.typography.labelMedium,
                 color = MaterialTheme.colorScheme.onSurfaceVariant
             )
@@ -104,9 +105,9 @@ internal fun FilterBottomSheet(
                         label    = {
                             Text(
                                 when (option) {
-                                    StatusFilter.COMPLETED -> strings.filterStatusCompleted // ← "Completed"
-                                    StatusFilter.PENDING   -> strings.filterStatusPending   // ← "Pending"
-                                    StatusFilter.FAILED    -> strings.filterStatusFailed    // ← "Failed"
+                                    StatusFilter.COMPLETED -> strings.history.filterStatusCompleted // ← "Completed"
+                                    StatusFilter.PENDING   -> strings.history.filterStatusPending   // ← "Pending"
+                                    StatusFilter.FAILED    -> strings.history.filterStatusFailed    // ← "Failed"
                                 }
                             )
                         }
@@ -118,7 +119,7 @@ internal fun FilterBottomSheet(
             if (availableTypes.isNotEmpty()) {
                 Spacer(Modifier.height(20.dp))
                 Text(
-                    text  = strings.filterSectionType,                         // ← "Type"
+                    text  = strings.history.filterSectionType,                         // ← "Type"
                     style = MaterialTheme.typography.labelMedium,
                     color = MaterialTheme.colorScheme.onSurfaceVariant
                 )
@@ -137,7 +138,7 @@ internal fun FilterBottomSheet(
 
             // ── Amount (sats) ─────────────────────────────────────────────────
             Text(
-                text  = strings.filterSectionAmount,                           // ← "Amount (sats)"
+                text  = strings.history.filterSectionAmount,                           // ← "Amount (sats)"
                 style = MaterialTheme.typography.labelMedium,
                 color = MaterialTheme.colorScheme.onSurfaceVariant
             )
@@ -158,8 +159,8 @@ internal fun FilterBottomSheet(
                 OutlinedTextField(
                     value           = minText,
                     onValueChange   = { minText = it.filter(Char::isDigit); commitAmount() },
-                    label           = { Text(strings.filterAmountMin_label) }, // ← "Min"
-                    suffix          = { Text(strings.filterAmountSuffix) },    // ← "sats"
+                    label           = { Text(strings.history.filterAmountMin_label) }, // ← "Min"
+                    suffix          = { Text(strings.history.filterAmountSuffix) },    // ← "sats"
                     singleLine      = true,
                     keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
                     modifier        = Modifier.weight(1f)
@@ -168,8 +169,8 @@ internal fun FilterBottomSheet(
                 OutlinedTextField(
                     value           = maxText,
                     onValueChange   = { maxText = it.filter(Char::isDigit); commitAmount() },
-                    label           = { Text(strings.filterAmountMax_label) }, // ← "Max"
-                    suffix          = { Text(strings.filterAmountSuffix) },    // ← "sats"
+                    label           = { Text(strings.history.filterAmountMax_label) }, // ← "Max"
+                    suffix          = { Text(strings.history.filterAmountSuffix) },    // ← "sats"
                     singleLine      = true,
                     keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
                     modifier        = Modifier.weight(1f)
@@ -179,7 +180,7 @@ internal fun FilterBottomSheet(
 
             // ── Date ──────────────────────────────────────────────────────────
             Text(
-                text  = strings.filterSectionDate,                             // ← "Date"
+                text  = strings.history.filterSectionDate,                             // ← "Date"
                 style = MaterialTheme.typography.labelMedium,
                 color = MaterialTheme.colorScheme.onSurfaceVariant
             )
@@ -189,9 +190,9 @@ internal fun FilterBottomSheet(
             Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
                 DatePreset.entries.forEach { preset ->
                     val label = when (preset) {
-                        DatePreset.THIS_WEEK  -> strings.filterDateThisWeek    // ← "This week"
-                        DatePreset.THIS_MONTH -> strings.filterDateThisMonth   // ← "This month"
-                        DatePreset.THIS_YEAR  -> strings.filterDateThisYear    // ← "This year"
+                        DatePreset.THIS_WEEK  -> strings.history.filterDateThisWeek    // ← "This week"
+                        DatePreset.THIS_MONTH -> strings.history.filterDateThisMonth   // ← "This month"
+                        DatePreset.THIS_YEAR  -> strings.history.filterDateThisYear    // ← "This year"
                     }
                     FilterChip(
                         selected = currentFilter.datePreset == preset,
@@ -219,8 +220,8 @@ internal fun FilterBottomSheet(
                 ) {
                     Text(
                         currentFilter.minCreatedAt
-                            ?.let { formatEpochShort(it) }
-                            ?: strings.filterDateFrom_label                    // ← "From"
+                            ?.let { formatEpochShort(it, strings.today, strings.yesterday) }
+                            ?: strings.history.filterDateFrom_label                    // ← "From"
                     )
                 }
                 Text("–", style = MaterialTheme.typography.bodyLarge)
@@ -230,8 +231,8 @@ internal fun FilterBottomSheet(
                 ) {
                     Text(
                         currentFilter.maxCreatedAt
-                            ?.let { formatEpochShort(it) }
-                            ?: strings.filterDateTo_label                      // ← "To"
+                            ?.let { formatEpochShort(it, strings.today, strings.yesterday) }
+                            ?: strings.history.filterDateTo_label                      // ← "To"
                     )
                 }
             }
@@ -247,11 +248,11 @@ internal fun FilterBottomSheet(
                             val epochSec = pickerState.selectedDateMillis?.div(1000)
                             onDateFilterSet(epochSec, currentFilter.maxCreatedAt)
                             showFromPicker = false
-                        }) { Text(strings.filterDialogOk) }                    // ← "OK"
+                        }) { Text(strings.history.filterDialogOk) }                    // ← "OK"
                     },
                     dismissButton = {
                         TextButton(onClick = { showFromPicker = false }) {
-                            Text(strings.filterDialogCancel)                   // ← "Cancel"
+                            Text(strings.history.filterDialogCancel)                   // ← "Cancel"
                         }
                     }
                 ) { DatePicker(state = pickerState) }
@@ -269,11 +270,11 @@ internal fun FilterBottomSheet(
                             val epochSec = pickerState.selectedDateMillis?.div(1000)?.let { it + 86399L }
                             onDateFilterSet(currentFilter.minCreatedAt, epochSec)
                             showToPicker = false
-                        }) { Text(strings.filterDialogOk) }                    // ← "OK"
+                        }) { Text(strings.history.filterDialogOk) }                    // ← "OK"
                     },
                     dismissButton = {
                         TextButton(onClick = { showToPicker = false }) {
-                            Text(strings.filterDialogCancel)                   // ← "Cancel"
+                            Text(strings.history.filterDialogCancel)                   // ← "Cancel"
                         }
                     }
                 ) { DatePicker(state = pickerState) }

app/src/main/java/com/bitcointxoko/gudariwallet/ui/history/HistoryComponents.kt

@@ -1,185 +0,0 @@
-package com.bitcointxoko.gudariwallet.ui.history
-
-import androidx.compose.foundation.clickable
-import androidx.compose.foundation.layout.Arrangement
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.ColumnScope
-import androidx.compose.foundation.layout.Row
-import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.height
-import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.layout.size
-import androidx.compose.foundation.layout.width
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.ContentCopy
-import androidx.compose.material3.Card
-import androidx.compose.material3.Icon
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Surface
-import androidx.compose.material3.Text
-import androidx.compose.runtime.Composable
-import androidx.compose.ui.Alignment
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.text.TextStyle
-import androidx.compose.ui.text.font.FontFamily
-import androidx.compose.ui.text.style.TextDecoration
-import androidx.compose.ui.text.style.TextOverflow
-import androidx.compose.ui.unit.dp
-import com.bitcointxoko.gudariwallet.LocalAppStrings
-import com.bitcointxoko.gudariwallet.ui.theme.semanticColors
-
-// ── Amount + fiat column ─────────────────────────────────────────────────────
-
-@Composable
-internal fun AmountWithFiatColumn(
-    amountSat          : Long,
-    isOutgoing         : Boolean,
-    amountColor        : Color,
-    fiatLine           : String?,
-    style              : TextStyle = MaterialTheme.typography.bodyMedium,
-    horizontalAlignment: Alignment.Horizontal = Alignment.End
-) {
-    val prefix = if (isOutgoing) "−" else "+"
-    Column(horizontalAlignment = horizontalAlignment) {
-        Text(
-            text  = "$prefix$amountSat sats",
-            style = style.copy(fontFamily = FontFamily.Monospace),
-            color = amountColor
-        )
-        if (fiatLine != null) {
-            Spacer(Modifier.height(if (horizontalAlignment == Alignment.CenterHorizontally) 4.dp else 1.dp))
-            Text(
-                text  = fiatLine,
-                style = MaterialTheme.typography.bodySmall,
-                color = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.75f)
-            )
-        }
-    }
-}
-
-// ── Status chip ──────────────────────────────────────────────────────────────
-
-@Composable
-internal fun StatusChip(status: String) {
-    val semantic = semanticColors()
-    val strings  = LocalAppStrings.current  // or however you access Lyricist strings
-
-    data class ChipStyle(
-        val containerColor: Color,
-        val contentColor:   Color,
-        val label:          String,
-    )
-
-    val style = when (status.lowercase()) {
-        "success", "complete", "paid"      -> ChipStyle(
-            semantic.successContainer, semantic.onSuccessContainer, strings.statusSuccess
-        )
-        "pending", "in_flight", "inflight" -> ChipStyle(
-            semantic.warningContainer, semantic.onWarningContainer, strings.statusPending
-        )
-        "failed", "error", "expired"       -> ChipStyle(
-            semantic.errorContainer, semantic.onErrorContainer, strings.statusFailed
-        )
-        else -> ChipStyle(
-            MaterialTheme.colorScheme.surfaceVariant,
-            MaterialTheme.colorScheme.onSurfaceVariant,
-            strings.statusUnknown,
-        )
-    }
-
-    Surface(
-        shape        = MaterialTheme.shapes.small,
-        color        = style.containerColor,
-        contentColor = style.contentColor,
-    ) {
-        Text(
-            text     = style.label,
-            style    = MaterialTheme.typography.labelSmall,
-            modifier = Modifier.padding(horizontal = 10.dp, vertical = 4.dp)
-        )
-    }
-}
-
-
-// ── Section card wrapper ─────────────────────────────────────────────────────
-
-@Composable
-internal fun DetailSection(
-    title  : String,
-    content: @Composable ColumnScope.() -> Unit
-) {
-    Card(modifier = Modifier.fillMaxWidth()) {
-        Column(modifier = Modifier.padding(16.dp)) {
-            Text(
-                text  = title,
-                style = MaterialTheme.typography.titleSmall,
-                color = MaterialTheme.colorScheme.primary
-            )
-            Spacer(Modifier.height(12.dp))
-            content()
-        }
-    }
-}
-
-// ── Label / value row ────────────────────────────────────────────────────────
-
-@Composable
-internal fun DetailRow(
-    label          : String,
-    value          : String,
-    monospace      : Boolean = false,
-    copyable       : Boolean = false,
-    onCopy         : (() -> Unit)? = null,
-    maxLines       : Int = Int.MAX_VALUE,
-    valueColor     : Color = Color.Unspecified,
-    textDecoration : TextDecoration? = null,
-    onValueClick   : (() -> Unit)? = null,
-    trailingContent: (@Composable () -> Unit)? = null
-) {
-    Row(
-        modifier = Modifier
-            .fillMaxWidth()
-            .then(if (copyable && onCopy != null) Modifier.clickable(onClick = onCopy) else Modifier)
-            .padding(vertical = 6.dp),
-        horizontalArrangement = Arrangement.SpaceBetween,
-        verticalAlignment     = Alignment.Top
-    ) {
-        Text(
-            text     = label,
-            style    = MaterialTheme.typography.bodySmall,
-            color    = MaterialTheme.colorScheme.onSurfaceVariant,
-            modifier = Modifier.weight(0.35f)
-        )
-        Spacer(Modifier.width(8.dp))
-        Row(
-            modifier          = Modifier.weight(0.65f),
-            verticalAlignment = Alignment.CenterVertically
-        ) {
-            Text(
-                text     = value,
-                style    = if (monospace)
-                    MaterialTheme.typography.bodySmall.copy(fontFamily = FontFamily.Monospace, textDecoration = textDecoration)
-                else
-                    MaterialTheme.typography.bodySmall.copy(textDecoration = textDecoration),
-                color    = valueColor,
-                modifier = Modifier
-                    .weight(1f, fill = false)
-                    .then(if (onValueClick != null) Modifier.clickable(onClick = onValueClick) else Modifier),
-                maxLines = maxLines,
-                overflow = TextOverflow.Ellipsis
-            )
-            if (copyable) {
-                Spacer(Modifier.width(4.dp))
-                Icon(
-                    imageVector        = Icons.Default.ContentCopy,
-                    contentDescription = "Copy $label",
-                    modifier           = Modifier.size(14.dp),
-                    tint               = MaterialTheme.colorScheme.onSurfaceVariant
-                )
-            }
-            trailingContent?.invoke()
-        }
-    }
-}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/history/HistoryScreen.kt

@@ -59,6 +59,7 @@ import androidx.compose.ui.unit.dp
 import com.bitcointxoko.gudariwallet.api.PaymentRecord
 import com.bitcointxoko.gudariwallet.LocalAppStrings
 import com.bitcointxoko.gudariwallet.ui.HistoryState
+import com.bitcointxoko.gudariwallet.util.formatEpochShort
 import kotlinx.coroutines.launch
 
 // ── List screen ──────────────────────────────────────────────────────────────
@@ -76,6 +77,7 @@ fun HistoryScreen(
     val fiatSatsPerUnit by vm.fiatSatsPerUnit.collectAsState()
     val availableTypes  by vm.availableTypes.collectAsState()
     val listState        = rememberLazyListState()
+    val contactNames by vm.contactNames.collectAsState()
 
     var filterSheetVisible     by rememberSaveable { mutableStateOf(false) }
     val dismissFilterSheet      = { filterSheetVisible = false }
@@ -88,12 +90,12 @@ fun HistoryScreen(
     Scaffold(
         topBar = {
             TopAppBar(
-                title = { Text(strings.historyTitle) },                        // ← "History"
+                title = { Text(strings.history.historyTitle) },                        // ← "History"
                 navigationIcon = {
                     IconButton(onClick = onClose) {
                         Icon(
                             imageVector        = Icons.Default.Close,
-                            contentDescription = strings.historyClose          // ← "Close"
+                            contentDescription = strings.history.historyClose          // ← "Close"
                         )
                     }
                 },
@@ -107,7 +109,7 @@ fun HistoryScreen(
                         }) {
                             Icon(
                                 imageVector        = Icons.Default.Search,
-                                contentDescription = strings.historySearchPayments // ← "Search payments"
+                                contentDescription = strings.history.historySearchPayments // ← "Search payments"
                             )
                         }
                     }
@@ -117,7 +119,7 @@ fun HistoryScreen(
                         IconButton(onClick = { filterSheetVisible = true }) {
                             Icon(
                                 imageVector        = Icons.Default.FilterList,
-                                contentDescription = strings.historyFilterPayments // ← "Filter payments"
+                                contentDescription = strings.history.historyFilterPayments // ← "Filter payments"
                             )
                         }
                     }
@@ -190,7 +192,7 @@ fun HistoryScreen(
                             )
                             Spacer(Modifier.height(12.dp))
                             Button(onClick = { vm.refresh() }) {
-                                Text(strings.historyRetry)                     // ← "Retry"
+                                Text(strings.history.historyRetry)                     // ← "Retry"
                             }
                         }
                     }
@@ -209,7 +211,7 @@ fun HistoryScreen(
 
                         if (s.payments.isEmpty()) {
                             Text(
-                                text     = strings.historyNoPayments,          // ← "No payments yet."
+                                text     = strings.history.historyNoPayments,          // ← "No payments yet."
                                 modifier = Modifier.align(Alignment.Center),
                                 style    = MaterialTheme.typography.bodyMedium,
                                 color    = MaterialTheme.colorScheme.onSurfaceVariant
@@ -233,6 +235,7 @@ fun HistoryScreen(
                                             payment         = payment,
                                             fiatCurrency    = fiatCurrency,
                                             fiatSatsPerUnit = fiatSatsPerUnit,
+                                            contactName     = contactNames[payment.checkingId],
                                             onClick         = { onPaymentClick(payment) }
                                         )
                                         HorizontalDivider(
@@ -309,13 +312,13 @@ private fun SearchBar(
         IconButton(onClick = onInfoClick) {
             Icon(
                 imageVector        = Icons.Default.Info,
-                contentDescription = strings.historySearchHelp                 // ← "Search help"
+                contentDescription = strings.history.historySearchHelp                 // ← "Search help"
             )
         }
         TextField(
             value         = query,
             onValueChange = onQueryChange,
-            placeholder   = { Text(strings.historySearchPlaceholder) },        // ← "Search transactions"
+            placeholder   = { Text(strings.history.historySearchPlaceholder) },        // ← "Search transactions"
             singleLine    = true,
             colors        = TextFieldDefaults.colors(
                 focusedContainerColor   = Color.Transparent,
@@ -336,7 +339,7 @@ private fun SearchBar(
         }) {
             Icon(
                 imageVector        = Icons.Default.ContentPaste,
-                contentDescription = strings.historySearchPaste                // ← "Paste"
+                contentDescription = strings.history.historySearchPaste                // ← "Paste"
             )
         }
         IconButton(
@@ -345,7 +348,7 @@ private fun SearchBar(
         ) {
             Icon(
                 imageVector        = Icons.Default.Close,
-                contentDescription = strings.historySearchClear,               // ← "Clear search"
+                contentDescription = strings.history.historySearchClear,               // ← "Clear search"
                 tint               = if (query.isNotEmpty()) LocalContentColor.current
                 else MaterialTheme.colorScheme.onSurface.copy(alpha = 0.38f)
             )
@@ -381,15 +384,15 @@ private fun ActiveFilterChips(
                 label    = {
                     Text(
                         when (filter.direction) {
-                            DirectionFilter.OUTGOING -> strings.filterDirectionOutgoing // ← "Outgoing"
-                            else                     -> strings.filterDirectionIncoming // ← "Incoming"
+                            DirectionFilter.OUTGOING -> strings.history.filterDirectionOutgoing // ← "Outgoing"
+                            else                     -> strings.history.filterDirectionIncoming // ← "Incoming"
                         }
                     )
                 },
                 trailingIcon = {
                     Icon(
                         imageVector        = Icons.Default.Close,
-                        contentDescription = strings.filterClearDirection,     // ← "Clear direction filter"
+                        contentDescription = strings.history.filterClearDirection,     // ← "Clear direction filter"
                         modifier           = Modifier.size(16.dp)
                     )
                 }
@@ -402,16 +405,16 @@ private fun ActiveFilterChips(
                 label    = {
                     Text(
                         when (s) {
-                            StatusFilter.COMPLETED -> strings.filterStatusCompleted // ← "Completed"
-                            StatusFilter.PENDING   -> strings.filterStatusPending   // ← "Pending"
-                            StatusFilter.FAILED    -> strings.filterStatusFailed    // ← "Failed"
+                            StatusFilter.COMPLETED -> strings.history.filterStatusCompleted // ← "Completed"
+                            StatusFilter.PENDING   -> strings.history.filterStatusPending   // ← "Pending"
+                            StatusFilter.FAILED    -> strings.history.filterStatusFailed    // ← "Failed"
                         }
                     )
                 },
                 trailingIcon = {
                     Icon(
                         imageVector        = Icons.Default.Close,
-                        contentDescription = strings.filterRemoveStatus,       // ← "Remove status filter"
+                        contentDescription = strings.history.filterRemoveStatus,       // ← "Remove status filter"
                         modifier           = Modifier.size(16.dp)
                     )
                 }
@@ -425,7 +428,7 @@ private fun ActiveFilterChips(
                 trailingIcon = {
                     Icon(
                         imageVector        = Icons.Default.Close,
-                        contentDescription = strings.filterRemoveType,         // ← "Remove type filter"
+                        contentDescription = strings.history.filterRemoveType,         // ← "Remove type filter"
                         modifier           = Modifier.size(16.dp)
                     )
                 }
@@ -434,11 +437,11 @@ private fun ActiveFilterChips(
         if (filter.minAmountSat != null || filter.maxAmountSat != null) {
             val label = when {
                 filter.minAmountSat != null && filter.maxAmountSat != null ->
-                    strings.filterAmountRange(filter.minAmountSat, filter.maxAmountSat) // ← "X–Y sats"
+                    strings.history.filterAmountRange(filter.minAmountSat, filter.maxAmountSat) // ← "X–Y sats"
                 filter.minAmountSat != null ->
-                    strings.filterAmountMin(filter.minAmountSat)                        // ← "≥ X sats"
+                    strings.history.filterAmountMin(filter.minAmountSat)                        // ← "≥ X sats"
                 else ->
-                    strings.filterAmountMax(filter.maxAmountSat!!)                      // ← "≤ X sats"
+                    strings.history.filterAmountMax(filter.maxAmountSat!!)                      // ← "≤ X sats"
             }
             InputChip(
                 selected = true,
@@ -447,7 +450,7 @@ private fun ActiveFilterChips(
                 trailingIcon = {
                     Icon(
                         imageVector        = Icons.Default.Close,
-                        contentDescription = strings.filterClearAmount,        // ← "Clear amount filter"
+                        contentDescription = strings.history.filterClearAmount,        // ← "Clear amount filter"
                         modifier           = Modifier.size(16.dp)
                     )
                 }
@@ -457,19 +460,19 @@ private fun ActiveFilterChips(
         val maxCreatedAt = filter.maxCreatedAt
         if (minCreatedAt != null || maxCreatedAt != null) {
             val label = when (filter.datePreset) {
-                DatePreset.THIS_WEEK  -> strings.filterDateThisWeek            // ← "This week"
-                DatePreset.THIS_MONTH -> strings.filterDateThisMonth           // ← "This month"
-                DatePreset.THIS_YEAR  -> strings.filterDateThisYear            // ← "This year"
+                DatePreset.THIS_WEEK  -> strings.history.filterDateThisWeek            // ← "This week"
+                DatePreset.THIS_MONTH -> strings.history.filterDateThisMonth           // ← "This month"
+                DatePreset.THIS_YEAR  -> strings.history.filterDateThisYear            // ← "This year"
                 null -> when {
                     minCreatedAt != null && maxCreatedAt != null ->
-                        strings.filterDateRange(                               // ← "X–Y"
-                            formatEpochShort(minCreatedAt),
-                            formatEpochShort(maxCreatedAt)
+                        strings.history.filterDateRange(                               // ← "X–Y"
+                            formatEpochShort(minCreatedAt, strings.today, strings.yesterday),
+                            formatEpochShort(maxCreatedAt, strings.today, strings.yesterday)
                         )
                     minCreatedAt != null ->
-                        strings.filterDateFrom(formatEpochShort(minCreatedAt)) // ← "From X"
+                        strings.history.filterDateFrom(formatEpochShort(minCreatedAt, strings.today, strings.yesterday)) // ← "From X"
                     else ->
-                        strings.filterDateUntil(formatEpochShort(maxCreatedAt!!)) // ← "Until X"
+                        strings.history.filterDateUntil(formatEpochShort(maxCreatedAt!!, strings.today, strings.yesterday)) // ← "Until X"
                 }
             }
             InputChip(
@@ -479,7 +482,7 @@ private fun ActiveFilterChips(
                 trailingIcon = {
                     Icon(
                         imageVector        = Icons.Default.Close,
-                        contentDescription = strings.filterClearDate,          // ← "Clear date filter"
+                        contentDescription = strings.history.filterClearDate,          // ← "Clear date filter"
                         modifier           = Modifier.size(16.dp)
                     )
                 }
@@ -489,11 +492,11 @@ private fun ActiveFilterChips(
             InputChip(
                 selected = true,
                 onClick  = onClearSearch,
-                label    = { Text(strings.historySearchChip(filter.searchQuery.takeLast(8))) }, // ← "search: …XXXXXXXX"
+                label    = { Text(strings.history.historySearchChip(filter.searchQuery.takeLast(8))) }, // ← "search: …XXXXXXXX"
                 trailingIcon = {
                     Icon(
                         imageVector        = Icons.Default.Close,
-                        contentDescription = strings.historyClearSearch,       // ← "Clear search"
+                        contentDescription = strings.history.historyClearSearch,       // ← "Clear search"
                         modifier           = Modifier.size(16.dp)
                     )
                 }

app/src/main/java/com/bitcointxoko/gudariwallet/ui/history/HistoryUtils.kt

@@ -4,36 +4,8 @@ import androidx.compose.material3.MaterialTheme
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.graphics.Color
 import com.bitcointxoko.gudariwallet.ui.theme.semanticColors
-
-// ── Pure helpers ─────────────────────────────────────────────────────────────
-
-internal fun formatEpochShort(epoch: Long): String =
-    java.time.format.DateTimeFormatter.ofPattern("dd MMM")
-        .withZone(java.time.ZoneId.systemDefault())
-        .format(java.time.Instant.ofEpochSecond(epoch))
-
-internal fun formatTimestamp(createdAt: Long?, rawTime: String): String {
-    val formatter = java.time.format.DateTimeFormatter
-        .ofPattern("dd MMM yyyy, HH:mm")
-        .withZone(java.time.ZoneId.systemDefault())
-    if (createdAt != null && createdAt > 1_000_000_000L) {  // sanity check
-        return formatter.format(java.time.Instant.ofEpochSecond(createdAt))
-    }
-    // Fallback: only reached for payments not yet written through Room
-    return runCatching {
-        formatter.format(java.time.Instant.ofEpochSecond(rawTime.toLong()))
-    }.recoverCatching {
-        formatter.format(java.time.OffsetDateTime.parse(rawTime))
-    }.getOrDefault(rawTime)
-}
-
-internal fun isPendingStatus(status: String): Boolean =
-    status.lowercase() in setOf("pending", "in_flight", "inflight")
-
-internal fun isFailedStatus(status: String): Boolean =
-    status.lowercase() in setOf("failed", "error", "expired")
-
-// ── Composable helpers ───────────────────────────────────────────────────────
+import com.bitcointxoko.gudariwallet.util.isFailedStatus
+import com.bitcointxoko.gudariwallet.util.isPendingStatus
 
 @Composable
 internal fun paymentAmountColor(status: String, isOutgoing: Boolean): Color {

app/src/main/java/com/bitcointxoko/gudariwallet/ui/history/HistoryViewModel.kt

@@ -5,9 +5,13 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewModelScope
 import com.bitcointxoko.gudariwallet.api.PaymentRecord
+import com.bitcointxoko.gudariwallet.data.ContactRepository
 import com.bitcointxoko.gudariwallet.data.NodeAliasRepository
 import com.bitcointxoko.gudariwallet.data.PaymentCacheRepository
 import com.bitcointxoko.gudariwallet.data.WalletRepository
+import com.bitcointxoko.gudariwallet.data.db.ContactEntity
+import com.bitcointxoko.gudariwallet.data.db.ContactWithAddresses
+import com.bitcointxoko.gudariwallet.data.db.PaymentAddressType
 import com.bitcointxoko.gudariwallet.service.WalletNotificationService
 import com.bitcointxoko.gudariwallet.ui.DetailState
 import com.bitcointxoko.gudariwallet.ui.HistoryState
@@ -21,6 +25,7 @@ import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
+import kotlin.time.Duration.Companion.milliseconds
 
 private const val TAG = "HistoryViewModel"
 
@@ -29,6 +34,7 @@ class HistoryViewModel(
     private val repo         : WalletRepository,
     private val aliasRepo    : NodeAliasRepository,
     private val paymentCache : PaymentCacheRepository,
+    private val contactRepo  : ContactRepository,
     val fiatCurrency         : StateFlow<String?>,
     val fiatSatsPerUnit      : StateFlow<Double?>
 ) : ViewModel() {
@@ -113,6 +119,7 @@ class HistoryViewModel(
             ?.payments?.firstOrNull { it.checkingId == checkingId }
     }
 
+
     // ── Room-backed query results ──────────────────────────────────────────────
     private val _roomResults = MutableStateFlow<List<PaymentRecord>?>(null)
 
@@ -150,13 +157,100 @@ class HistoryViewModel(
                 else list.filter { it.extra?.tag in f.types }
             }
 
+    // ── Contact name map ─────────────────────────────────────────────────────
+    // Maps checkingId → display name for any payment that has a linked contact.
+    // Rebuilt whenever the underlying tx_contact_links or contacts tables change.
+    val contactNames: StateFlow<Map<String, String>> =
+        contactRepo.observeAllPaymentContactNames()
+            .stateIn(
+                scope = viewModelScope,
+                started = SharingStarted.WhileSubscribed(5_000),
+                initialValue = emptyMap()
+            )
+    // Maps contactId → display name (for filter chips)
+    val contactDisplayNames: StateFlow<Map<String, String>> =
+        contactRepo.observeAllContacts()
+            .map { contacts ->
+                contacts.associate { c ->
+                    c.contact.id to (c.contact.localAlias
+                        ?: c.contact.displayName
+                        ?: c.contact.name
+                        ?: "Unknown")
+                }
+            }
+            .stateIn(
+                scope = viewModelScope,
+                started = SharingStarted.WhileSubscribed(5_000),
+                initialValue = emptyMap()
+            )
+
+    // ── Contact assignment ───────────────────────────────────────────────────
+
+    fun contactsForPayment(paymentHash: String): StateFlow<List<ContactEntity>> =
+        contactRepo.observeContactsForPayment(paymentHash)
+            .stateIn(
+                scope = viewModelScope,
+                started = SharingStarted.WhileSubscribed(5_000),
+                initialValue = emptyList()
+            )
+
+    fun allContacts(): StateFlow<List<ContactWithAddresses>> =
+        contactRepo.observeAllContacts()
+            .stateIn(
+                scope = viewModelScope,
+                started = SharingStarted.WhileSubscribed(5_000),
+                initialValue = emptyList()
+            )
+
+    fun assignContact(paymentHash: String, contactId: String) {
+        viewModelScope.launch {
+            contactRepo.linkPaymentToContact(paymentHash, contactId)
+        }
+    }
+
+    fun unassignContact(paymentHash: String, contactId: String) {
+        viewModelScope.launch {
+            contactRepo.unlinkPaymentFromContact(paymentHash, contactId)
+        }
+    }
+
+    fun saveContactAndAssign(
+        paymentHash : String,
+        name        : String,
+        addressType : PaymentAddressType?,
+        address     : String?
+    ) {
+        viewModelScope.launch {
+            val lnAddress = address?.takeIf { addressType == PaymentAddressType.LIGHTNING_ADDRESS }
+            val lnUrl     = address?.takeIf { addressType == PaymentAddressType.LNURL }
+            val contact = contactRepo.createContact(
+                localAlias = name,
+                lnAddress  = lnAddress,
+                lnUrl      = lnUrl
+            )
+            contactRepo.linkPaymentToContact(paymentHash, contact.id)
+        }
+    }
+
+    fun toggleContactFilter(contactId: String) {
+        _filter.update { f ->
+            val updated = if (contactId in f.contactIds)
+                f.contactIds - contactId else f.contactIds + contactId
+            f.copy(contactIds = updated)
+        }
+    }
+    fun clearContactFilter() {
+        _filter.update { it.copy(contactIds = emptySet()) }
+    }
+
+
     // ── Init ──────────────────────────────────────────────────────────────────
     init {
         syncManager.init()
 
         viewModelScope.launch {
             combine(
-                _filter.map { it.searchQuery }.debounce(300),
+                _filter.map { it.searchQuery }.debounce(300.milliseconds),
                 _filter
             ) { _, f -> f }
                 .collect { f ->
@@ -164,11 +258,50 @@ class HistoryViewModel(
                         Timber.d("FILTER [IN-MEMORY] filter=default → using cached state")
                         _roomResults.value = null
                     } else {
-                        Timber.d("FILTER [ROOM     ] q=\"${f.searchQuery}\" " +
-                                "statuses=${f.statuses} dir=${f.direction} types=${f.types} " +
-                                "amt=${f.minAmountSat}–${f.maxAmountSat} " +
-                                "date=${f.minCreatedAt}–${f.maxCreatedAt}")
-                        _roomResults.value = paymentCache.queryAll(f.searchQuery, f)
+                        // ── Room query path ───────────────────────────────────
+                        val baseResults = paymentCache.queryAll(f.searchQuery, f)
+                            .toMutableList()
+
+                        // ── Supplemental contact search ───────────────────────
+                        // 1. Text query may match contact names not in payment_records
+                        if (f.searchQuery.isNotBlank()) {
+                            val contactCheckingIds = contactRepo
+                                .findCheckingIdsByContactName(f.searchQuery)
+                            if (contactCheckingIds.isNotEmpty()) {
+                                val contactPayments = paymentCache
+                                    .queryByCheckingIds(contactCheckingIds, f)
+                                // Merge without duplicates
+                                val existingIds = baseResults.map { it.checkingId }.toSet()
+                                baseResults += contactPayments
+                                    .filter { it.checkingId !in existingIds }
+                            }
+                        }
+
+                        // 2. Explicit contact ID filter
+                        if (f.contactIds.isNotEmpty()) {
+                            val contactCheckingIds = contactRepo
+                                .findCheckingIdsByContactIds(f.contactIds.toList())
+                            if (contactCheckingIds.isNotEmpty()) {
+                                // Fetch ALL payments for these contacts, WITH the full filter applied
+                                val contactFiltered = paymentCache.queryByCheckingIds(
+                                    checkingIds = contactCheckingIds,
+                                    filter      = f
+                                )
+                                _roomResults.value = contactFiltered
+                                    .also {
+                                        Timber.d("FILTER [ROOM+CONTACT] contacts=${f.contactIds} → ${it.size} results")
+                                    }
+                                return@collect
+                            } else {
+                                // Selected contacts have no payments — return empty
+                                _roomResults.value = emptyList()
+                                return@collect
+                            }
+                        }
+
+                        _roomResults.value = baseResults.also {
+                            Timber.d("FILTER [ROOM] q=\"${f.searchQuery}\" → ${it.size} results")
+                        }
                     }
                 }
         }
@@ -187,6 +320,7 @@ class HistoryViewModelFactory(
     private val repo           : WalletRepository,
     private val aliasRepo      : NodeAliasRepository,
     private val paymentCache   : PaymentCacheRepository,
+    private val contactRepo     : ContactRepository,
     private val fiatCurrency   : StateFlow<String?>,
     private val fiatSatsPerUnit: StateFlow<Double?>
 ) : ViewModelProvider.Factory {
@@ -196,6 +330,7 @@ class HistoryViewModelFactory(
             repo            = repo,
             aliasRepo       = aliasRepo,
             paymentCache    = paymentCache,
+            contactRepo     = contactRepo,
             fiatCurrency    = fiatCurrency,
             fiatSatsPerUnit = fiatSatsPerUnit
         ) as T

app/src/main/java/com/bitcointxoko/gudariwallet/ui/history/PaymentDetailScreen.kt

@@ -6,24 +6,29 @@ import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.ArrowBack
 import androidx.compose.material.icons.filled.ArrowDownward
 import androidx.compose.material.icons.filled.ArrowUpward
-import androidx.compose.material.icons.outlined.ContentCopy
+import androidx.compose.material.icons.filled.Close
+import androidx.compose.material.icons.filled.PersonAdd
 import androidx.compose.material3.Card
 import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
@@ -33,8 +38,10 @@ import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.ClipEntry
@@ -42,14 +49,24 @@ import androidx.compose.ui.platform.LocalClipboard
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.unit.dp
 import androidx.core.net.toUri
-import com.bitcointxoko.gudariwallet.api.PaymentRecord
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import com.bitcointxoko.gudariwallet.LocalAppStrings
+import com.bitcointxoko.gudariwallet.api.PaymentRecord
+import com.bitcointxoko.gudariwallet.data.db.PaymentAddressType
 import com.bitcointxoko.gudariwallet.ui.DetailState
+import com.bitcointxoko.gudariwallet.ui.common.AmountWithFiatColumn
+import com.bitcointxoko.gudariwallet.ui.common.CopyIconButton
+import com.bitcointxoko.gudariwallet.ui.common.DetailRow
+import com.bitcointxoko.gudariwallet.ui.common.DetailSection
+import com.bitcointxoko.gudariwallet.ui.common.StatusChip
+import com.bitcointxoko.gudariwallet.ui.contacts.ContactPickerSheet
+import com.bitcointxoko.gudariwallet.ui.contacts.CreateContactSheet
 import com.bitcointxoko.gudariwallet.util.feePpm
 import com.bitcointxoko.gudariwallet.util.formatFiatForSats
+import com.bitcointxoko.gudariwallet.util.formatTimestamp
 import kotlinx.coroutines.launch
 
-// ── Detail screen ────────────────────────────────────────────────────────────
+// ── Detail screen ──────────────────────────────────────────────────────────────
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -58,8 +75,8 @@ fun PaymentDetailScreen(
     vm      : HistoryViewModel,
     onBack  : () -> Unit
 ) {
-    val strings         = LocalAppStrings.current
-    val detailState     by vm.detailState.collectAsState()
+    val strings = LocalAppStrings.current
+    val detailState  by vm.detailState.collectAsState()
     val fiatCurrency    by vm.fiatCurrency.collectAsState()
     val fiatSatsPerUnit by vm.fiatSatsPerUnit.collectAsState()
 
@@ -71,14 +88,31 @@ fun PaymentDetailScreen(
             val detail = s.detail.details
             when {
                 detail == null -> payment
-                else           -> detail.copy(
-                    memo   = detail.memo?.takeIf   { it.isNotBlank() } ?: payment.memo,
+                else -> detail.copy(
+                    memo   = detail.memo?.takeIf { it.isNotBlank() } ?: payment.memo,
                     bolt11 = detail.bolt11?.takeIf { it.isNotBlank() } ?: payment.bolt11
                 )
             }
         }
         is DetailState.Partial -> s.record
-        else -> payment
+        else                   -> payment
+    }
+
+    // ── Contact state ─────────────────────────────────────────────────────────
+    val linkedContacts by remember(payment.checkingId) {
+        vm.contactsForPayment(payment.checkingId)
+    }.collectAsStateWithLifecycle()
+
+    val allContacts by remember { vm.allContacts() }.collectAsStateWithLifecycle()
+
+    var showContactPicker by remember { mutableStateOf(false) }
+    var showCreateContact by remember { mutableStateOf(false) }
+
+    // Best-effort lnAddress to pre-fill CreateContactSheet:
+    // prefer extra.comment if it looks like a Lightning Address, else null
+    val paymentLnAddress = remember(enriched) {
+        enriched.extra?.comment
+            ?.takeIf { it.contains("@") && !it.contains(" ") }
     }
 
     Scaffold(
@@ -86,15 +120,15 @@ fun PaymentDetailScreen(
             TopAppBar(
                 title = {
                     Text(
-                        if (payment.isOutgoing) strings.detailOutgoingTitle   // ← "Outgoing payment"
-                        else                    strings.detailIncomingTitle    // ← "Incoming payment"
+                        if (payment.isOutgoing) strings.history.detailOutgoingTitle
+                        else strings.history.detailIncomingTitle
                     )
                 },
                 navigationIcon = {
                     IconButton(onClick = onBack) {
                         Icon(
                             imageVector        = Icons.AutoMirrored.Filled.ArrowBack,
-                            contentDescription = strings.detailBack            // ← "Back"
+                            contentDescription = strings.history.detailBack
                         )
                     }
                 }
@@ -104,8 +138,8 @@ fun PaymentDetailScreen(
         when (detailState) {
             is DetailState.Loading -> {
                 Box(
-                    modifier         = Modifier.fillMaxSize().padding(padding),
-                    contentAlignment = Alignment.Center
+                    modifier           = Modifier.fillMaxSize().padding(padding),
+                    contentAlignment   = Alignment.Center
                 ) { CircularProgressIndicator() }
             }
 
@@ -116,7 +150,7 @@ fun PaymentDetailScreen(
                         modifier = Modifier.fillMaxWidth()
                     ) {
                         Text(
-                            text     = strings.detailCouldNotLoad,             // ← "Could not load full details"
+                            text     = strings.history.detailCouldNotLoad,
                             color    = MaterialTheme.colorScheme.onErrorContainer,
                             style    = MaterialTheme.typography.bodySmall,
                             modifier = Modifier.padding(12.dp)
@@ -125,33 +159,78 @@ fun PaymentDetailScreen(
                     PaymentDetailContent(
                         payment         = enriched,
                         fiatCurrency    = fiatCurrency,
-                        fiatSatsPerUnit = fiatSatsPerUnit
+                        fiatSatsPerUnit = fiatSatsPerUnit,
+                        linkedContacts  = linkedContacts,
+                        onAssignContact = { showContactPicker = true },
+                        onUnassignContact = { contactId ->
+                            vm.unassignContact(payment.checkingId, contactId)
+                        }
                     )
                 }
             }
 
             else -> {
                 PaymentDetailContent(
-                    payment         = enriched,
-                    fiatCurrency    = fiatCurrency,
-                    fiatSatsPerUnit = fiatSatsPerUnit,
-                    modifier        = Modifier.padding(padding)
+                    payment           = enriched,
+                    fiatCurrency      = fiatCurrency,
+                    fiatSatsPerUnit   = fiatSatsPerUnit,
+                    linkedContacts    = linkedContacts,
+                    onAssignContact   = { showContactPicker = true },
+                    onUnassignContact = { contactId ->
+                        vm.unassignContact(payment.checkingId, contactId)
+                    },
+                    modifier          = Modifier.padding(padding)
                 )
             }
         }
     }
+
+    // ── Contact picker sheet ──────────────────────────────────────────────────
+    if (showContactPicker) {
+        ContactPickerSheet(
+            contacts          = allContacts,
+            onContactSelected = { contactId ->
+                vm.assignContact(payment.checkingId, contactId)
+                showContactPicker = false
+            },
+            onCreateNew = {
+                showContactPicker = false
+                showCreateContact = true
+            },
+            onDismiss = { showContactPicker = false }
+        )
+    }
+
+    // ── Create & assign contact sheet ─────────────────────────────────────────
+    if (showCreateContact) {
+        val addressType = if (paymentLnAddress != null)
+            PaymentAddressType.LIGHTNING_ADDRESS else PaymentAddressType.LIGHTNING_ADDRESS
+
+        CreateContactSheet(
+            initialAddressType = addressType,
+            initialAddress     = paymentLnAddress,
+            onSave = { name, type, address ->
+                vm.saveContactAndAssign(payment.checkingId, name, type, address)
+                showCreateContact = false
+            },
+            onDismiss = { showCreateContact = false }
+        )
+    }
 }
 
-// ── Detail content ───────────────────────────────────────────────────────────
+// ── Detail content ─────────────────────────────────────────────────────────────
 
 @Composable
 private fun PaymentDetailContent(
-    payment         : PaymentRecord,
-    fiatCurrency    : String?,
-    fiatSatsPerUnit : Double?,
-    modifier        : Modifier = Modifier
+    payment           : PaymentRecord,
+    fiatCurrency      : String?,
+    fiatSatsPerUnit   : Double?,
+    linkedContacts    : List<com.bitcointxoko.gudariwallet.data.db.ContactEntity>,
+    onAssignContact   : () -> Unit,
+    onUnassignContact : (contactId: String) -> Unit,
+    modifier          : Modifier = Modifier
 ) {
-    val strings     = LocalAppStrings.current
+    val strings    = LocalAppStrings.current
     val amountColor = paymentAmountColor(payment.status, payment.isOutgoing)
 
     val context   = LocalContext.current
@@ -173,45 +252,42 @@ private fun PaymentDetailContent(
     }
 
     LazyColumn(
-        modifier            = modifier.fillMaxSize(),
-        contentPadding      = PaddingValues(16.dp),
+        modifier         = modifier.fillMaxSize(),
+        contentPadding   = PaddingValues(16.dp),
         verticalArrangement = Arrangement.spacedBy(12.dp)
     ) {
 
-        // ── Hero amount ──────────────────────────────────────────────────────
+        // ── Hero amount ────────────────────────────────────────────────────────
         item {
             Card(modifier = Modifier.fillMaxWidth()) {
                 Column(
-                    modifier            = Modifier.fillMaxWidth().padding(24.dp),
-                    horizontalAlignment = Alignment.CenterHorizontally
+                    modifier             = Modifier.fillMaxWidth().padding(24.dp),
+                    horizontalAlignment  = Alignment.CenterHorizontally
                 ) {
                     Icon(
                         imageVector        = if (payment.isOutgoing) Icons.Default.ArrowUpward
-                        else                     Icons.Default.ArrowDownward,
+                        else Icons.Default.ArrowDownward,
                         contentDescription = null,
                         tint               = amountColor,
                         modifier           = Modifier.size(36.dp)
                     )
                     Spacer(Modifier.height(8.dp))
                     AmountWithFiatColumn(
-                        amountSat           = payment.amountSat,
-                        isOutgoing          = payment.isOutgoing,
-                        amountColor         = amountColor,
-                        fiatLine            = heroFiat,
-                        style               = MaterialTheme.typography.headlineLarge,
+                        amountSat          = payment.amountSat,
+                        isOutgoing         = payment.isOutgoing,
+                        amountColor        = amountColor,
+                        fiatLine           = heroFiat,
+                        style              = MaterialTheme.typography.headlineLarge,
                         horizontalAlignment = Alignment.CenterHorizontally
                     )
                     if (payment.feeSat > 0) {
-                        val ppm      = feePpm(
+                        val ppm = feePpm(
                             amountMsat = kotlin.math.abs(payment.amountMsat),
                             feeMsat    = kotlin.math.abs(payment.feeMsat)
                         )
-                        // Build the optional parts separately so the lambda stays clean
                         val fiatPart = if (feeFiat != null) " ($feeFiat)" else ""
-                        val ppmPart  = if (ppm != null)     " · $ppm ppm" else ""
-                        val feeLabel = strings.detailFeeLabel(             // ← "Fee: X sats (fiat) · Y ppm"
-                            payment.feeSat, fiatPart, ppmPart
-                        )
+                        val ppmPart  = if (ppm != null) " · $ppm ppm" else ""
+                        val feeLabel = strings.history.detailFeeLabel(payment.feeSat, fiatPart, ppmPart)
                         Spacer(Modifier.height(4.dp))
                         Text(
                             text  = feeLabel,
@@ -225,43 +301,118 @@ private fun PaymentDetailContent(
             }
         }
 
-        // ── Basic info ───────────────────────────────────────────────────────
+        // ── Contact section ────────────────────────────────────────────────────
         item {
-            DetailSection(title = strings.detailSectionDetails) {             // ← "Details"
-                DetailRow(strings.detailRowDate, formatTimestamp(payment.createdAt, payment.time)) // ← "Date"
+            DetailSection(title = "Contact") {
+                if (linkedContacts.isEmpty()) {
+                    // No contact linked — show assign button
+                    OutlinedButton(
+                        onClick  = onAssignContact,
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .padding(horizontal = 16.dp, vertical = 4.dp)
+                    ) {
+                        Icon(
+                            imageVector        = Icons.Default.PersonAdd,
+                            contentDescription = null,
+                            modifier           = Modifier.size(18.dp)
+                        )
+                        Spacer(Modifier.width(6.dp))
+                        Text("Assign contact")
+                    }
+                } else {
+                    // Show each linked contact with a remove button
+                    linkedContacts.forEach { contact ->
+                        val name = contact.localAlias
+                            ?: contact.displayName
+                            ?: contact.name
+                            ?: "Unknown"
+                        DetailRow(
+                            label           = "Contact",
+                            value           = name,
+                            trailingContent = {
+                                IconButton(
+                                    onClick  = { onUnassignContact(contact.id) },
+                                    modifier = Modifier.size(32.dp)
+                                ) {
+                                    Icon(
+                                        imageVector        = Icons.Default.Close,
+                                        contentDescription = "Remove contact",
+                                        modifier           = Modifier.size(16.dp),
+                                        tint               = MaterialTheme.colorScheme.onSurfaceVariant
+                                    )
+                                }
+                            }
+                        )
+                    }
+                    // Allow assigning additional contacts
+                    HorizontalDivider(
+                        modifier  = Modifier.padding(horizontal = 16.dp),
+                        thickness = 0.5.dp
+                    )
+                    Row(
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .padding(horizontal = 16.dp, vertical = 4.dp),
+                        horizontalArrangement = Arrangement.End
+                    ) {
+                        androidx.compose.material3.TextButton(onClick = onAssignContact) {
+                            Icon(
+                                imageVector        = Icons.Default.PersonAdd,
+                                contentDescription = null,
+                                modifier           = Modifier.size(16.dp)
+                            )
+                            Spacer(Modifier.width(4.dp))
+                            Text(
+                                text  = "Add another",
+                                style = MaterialTheme.typography.labelMedium
+                            )
+                        }
+                    }
+                }
+            }
+        }
+
+        // ── Basic info ─────────────────────────────────────────────────────────
+        item {
+            DetailSection(title = strings.history.detailSectionDetails) {
                 DetailRow(
-                    strings.detailRowMemo,                                     // ← "Memo"
-                    payment.memo?.takeIf { it.isNotBlank() } ?: strings.detailRowMemoEmpty // ← "—"
+                    strings.history.detailRowDate,
+                    formatTimestamp(payment.createdAt, payment.time, strings.today, strings.yesterday)
+                )
+                DetailRow(
+                    strings.history.detailRowMemo,
+                    payment.memo?.takeIf { it.isNotBlank() } ?: strings.history.detailRowMemoEmpty
                 )
                 if (payment.extra?.tag != null) {
-                    DetailRow(strings.detailRowType, payment.extra.tag)        // ← "Type"
+                    DetailRow(strings.history.detailRowType, payment.extra.tag)
                 }
                 if (payment.extra?.comment?.isNotBlank() == true) {
-                    DetailRow(strings.detailRowComment, payment.extra.comment) // ← "Comment"
+                    DetailRow(strings.history.detailRowComment, payment.extra.comment)
                 }
             }
         }
 
-        // ── Success action (LNURL) ───────────────────────────────────────────
+        // ── Success action (LNURL) ─────────────────────────────────────────────
         payment.extra?.successAction?.let { action ->
             item {
-                DetailSection(title = strings.detailSectionSuccessAction) {   // ← "Success Action"
-                    action.message?.let     { DetailRow(strings.detailSuccessMessage,     it) } // ← "Message"
-                    action.url?.let         { DetailRow(strings.detailSuccessUrl,         it) } // ← "URL"
-                    action.description?.let { DetailRow(strings.detailSuccessDescription, it) } // ← "Description"
+                DetailSection(title = strings.history.detailSectionSuccessAction) {
+                    action.message?.let     { DetailRow(strings.history.detailSuccessMessage, it) }
+                    action.url?.let         { DetailRow(strings.history.detailSuccessUrl, it) }
+                    action.description?.let { DetailRow(strings.history.detailSuccessDescription, it) }
                 }
             }
         }
 
-        // ── Technical ────────────────────────────────────────────────────────
+        // ── Technical ─────────────────────────────────────────────────────────
         item {
-            DetailSection(title = strings.detailSectionTechnical) {           // ← "Technical"
+            DetailSection(title = strings.history.detailSectionTechnical) {
                 DetailRow(
-                    label     = strings.detailRowPaymentHash,                  // ← "Payment Hash"
-                    value     = payment.paymentHash,
+                    label    = strings.history.detailRowPaymentHash,
+                    value    = payment.paymentHash,
                     monospace = true,
                     copyable  = true,
-                    onCopy    = {
+                    onCopy   = {
                         scope.launch {
                             clipboard.setClipEntry(
                                 ClipEntry(ClipData.newPlainText("Payment Hash", payment.paymentHash))
@@ -271,11 +422,11 @@ private fun PaymentDetailContent(
                 )
                 if (!payment.preimage.isNullOrBlank() && payment.preimage != "0".repeat(64)) {
                     DetailRow(
-                        label     = strings.detailRowPreimage,                 // ← "Preimage"
-                        value     = payment.preimage,
+                        label    = strings.history.detailRowPreimage,
+                        value    = payment.preimage,
                         monospace = true,
                         copyable  = true,
-                        onCopy    = {
+                        onCopy   = {
                             scope.launch {
                                 clipboard.setClipEntry(
                                     ClipEntry(ClipData.newPlainText("Preimage", payment.preimage))
@@ -288,7 +439,7 @@ private fun PaymentDetailContent(
                     val ambossUrl = "https://amboss.space/node/$pubkey"
                     val label     = alias ?: "${pubkey.take(8)}…${pubkey.takeLast(8)}"
                     DetailRow(
-                        label           = strings.detailRowDestination,        // ← "Destination"
+                        label           = strings.history.detailRowDestination,
                         value           = label,
                         valueColor      = MaterialTheme.colorScheme.primary,
                         textDecoration  = androidx.compose.ui.text.style.TextDecoration.Underline,
@@ -296,34 +447,18 @@ private fun PaymentDetailContent(
                             context.startActivity(Intent(Intent.ACTION_VIEW, ambossUrl.toUri()))
                         },
                         trailingContent = {
-                            IconButton(
-                                onClick  = {
-                                    scope.launch {
-                                        clipboard.setClipEntry(
-                                            ClipEntry(ClipData.newPlainText("node_id", pubkey))
-                                        )
-                                    }
-                                },
-                                modifier = Modifier.size(32.dp)
-                            ) {
-                                Icon(
-                                    imageVector        = Icons.Outlined.ContentCopy,
-                                    contentDescription = strings.detailCopyNodeId, // ← "Copy node ID"
-                                    modifier           = Modifier.size(14.dp),
-                                    tint               = MaterialTheme.colorScheme.onSurfaceVariant
-                                )
-                            }
+                            CopyIconButton(label = "node_id", value = pubkey)
                         }
                     )
                 }
                 if (!payment.bolt11.isNullOrBlank()) {
                     DetailRow(
-                        label     = strings.detailRowBolt11,                   // ← "BOLT11"
-                        value     = payment.bolt11,
+                        label    = strings.history.detailRowBolt11,
+                        value    = payment.bolt11,
                         monospace = true,
                         copyable  = true,
                         maxLines  = 3,
-                        onCopy    = {
+                        onCopy   = {
                             scope.launch {
                                 clipboard.setClipEntry(
                                     ClipEntry(ClipData.newPlainText("BOLT11", payment.bolt11))

app/src/main/java/com/bitcointxoko/gudariwallet/ui/history/PaymentFilter.kt

@@ -14,7 +14,8 @@ data class PaymentFilter(
     val maxAmountSat : Long?             = null,
     val minCreatedAt : Long?             = null,
     val maxCreatedAt : Long?             = null,
-    val datePreset   : DatePreset?       = null
+    val datePreset   : DatePreset?       = null,
+    val contactIds   : Set<String>     = emptySet()
 )
 
 enum class DirectionFilter { ALL, OUTGOING, INCOMING }
@@ -29,12 +30,16 @@ val PaymentFilter.isActive: Boolean
             || maxAmountSat != null
             || minCreatedAt != null
             || maxCreatedAt != null
+            || contactIds.isNotEmpty()
 
 fun PaymentFilter.needsRoomQuery(): Boolean =
     searchQuery.isNotBlank() ||
             statuses.isNotEmpty() ||
-            minAmountSat != null || maxAmountSat != null ||
-            minCreatedAt != null || maxCreatedAt != null
+            minAmountSat != null ||
+            maxAmountSat != null ||
+            minCreatedAt != null ||
+            maxCreatedAt != null ||
+            contactIds.isNotEmpty()
 
 /** Resolves a [DatePreset] to a (epochSecondMin, epochSecondMax) pair. */
 fun DatePreset.toEpochSecondRange(): Pair<Long, Long> {

app/src/main/java/com/bitcointxoko/gudariwallet/ui/history/PaymentRow.kt

@@ -24,14 +24,19 @@ import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import com.bitcointxoko.gudariwallet.api.PaymentRecord
 import com.bitcointxoko.gudariwallet.LocalAppStrings
+import com.bitcointxoko.gudariwallet.ui.common.AmountWithFiatColumn
 import com.bitcointxoko.gudariwallet.ui.theme.semanticColors
 import com.bitcointxoko.gudariwallet.util.formatFiatForSats
+import com.bitcointxoko.gudariwallet.util.formatTimestamp
+import com.bitcointxoko.gudariwallet.util.isFailedStatus
+import com.bitcointxoko.gudariwallet.util.isPendingStatus
 
 @Composable
 internal fun PaymentRow(
     payment         : PaymentRecord,
     fiatCurrency    : String?,
     fiatSatsPerUnit : Double?,
+    contactName     : String? = null,
     onClick         : () -> Unit
 ) {
     val strings     = LocalAppStrings.current
@@ -57,8 +62,8 @@ internal fun PaymentRow(
     ) {
         Icon(
             imageVector        = icon,
-            contentDescription = if (payment.isOutgoing) strings.paymentRowSentCD  // ← "Sent"
-            else                    strings.paymentRowReceivedCD, // ← "Received"
+            contentDescription = if (payment.isOutgoing) strings.history.paymentRowSentCD  // ← "Sent"
+            else                    strings.history.paymentRowReceivedCD, // ← "Received"
             tint               = amountColor,
             modifier           = Modifier.size(20.dp)
         )
@@ -66,15 +71,16 @@ internal fun PaymentRow(
 
         Column(modifier = Modifier.weight(1f)) {
             Text(
-                text     = payment.memo?.takeIf { it.isNotBlank() }
-                    ?: strings.paymentRowNoMemo,                    // ← "No memo"
+                text = contactName                              // ← contact name first
+                    ?: payment.memo?.takeIf { it.isNotBlank() }
+                    ?: strings.history.paymentRowNoMemo,
                 style    = MaterialTheme.typography.bodyMedium,
                 maxLines = 1,
                 overflow = TextOverflow.Ellipsis
             )
             Spacer(Modifier.height(2.dp))
             val formattedTime = remember(payment.createdAt ?: payment.time) {
-                formatTimestamp(payment.createdAt, payment.time)
+                formatTimestamp(payment.createdAt, payment.time, strings.today, strings.yesterday)
             }
             Text(
                 text  = formattedTime,
@@ -82,8 +88,8 @@ internal fun PaymentRow(
                 color = MaterialTheme.colorScheme.onSurfaceVariant
             )
             val statusLabel = when {
-                isPending -> strings.paymentRowPending
-                isFailed  -> strings.paymentRowFailed
+                isPending -> strings.history.paymentRowPending
+                isFailed  -> strings.history.paymentRowFailed
                 else      -> null
             }
             val statusColor = when {

app/src/main/java/com/bitcointxoko/gudariwallet/ui/history/PaymentSyncManager.kt

@@ -159,8 +159,7 @@ class PaymentSyncManager(
             val reachedEnd     = page.size < WalletConstants.PAYMENTS_PAGE_SIZE
 
             if (reachedOverlap || reachedEnd) {
-                Timber.d("PAYMENTS [SYNC DONE ] $totalNew new payment(s) across $pagesChecked page(s) — " +
-                        if (reachedOverlap) "stopped at known record" else "reached end of history")
+                Timber.d("null%s", if (reachedOverlap) "stopped at known record" else "reached end of history")
                 break
             }
 

app/src/main/java/com/bitcointxoko/gudariwallet/ui/history/SearchInfoSheet.kt

@@ -33,45 +33,45 @@ internal fun SearchInfoSheet(visible: Boolean, onDismiss: () -> Unit) {
                 .padding(start = 24.dp, end = 24.dp, bottom = 40.dp)
         ) {
             Text(
-                text  = strings.searchInfoTitle,                               // ← "What can I search for?"
+                text  = strings.history.searchInfoTitle,                               // ← "What can I search for?"
                 style = MaterialTheme.typography.titleMedium
             )
             Spacer(Modifier.height(8.dp))
             Text(
-                text  = strings.searchInfoSubtitle,                            // ← "Type any part of the following…"
+                text  = strings.history.searchInfoSubtitle,                            // ← "Type any part of the following…"
                 style = MaterialTheme.typography.bodyMedium,
                 color = MaterialTheme.colorScheme.onSurfaceVariant
             )
             Spacer(Modifier.height(20.dp))
 
             SearchInfoItem(
-                title       = strings.searchInfoMemoTitle,                     // ← "Memo"
-                description = strings.searchInfoMemoDesc
+                title       = strings.history.searchInfoMemoTitle,                     // ← "Memo"
+                description = strings.history.searchInfoMemoDesc
             )
             SearchInfoItem(
-                title       = strings.searchInfoInvoiceTitle,                  // ← "Invoice"
-                description = strings.searchInfoInvoiceDesc
+                title       = strings.history.searchInfoInvoiceTitle,                  // ← "Invoice"
+                description = strings.history.searchInfoInvoiceDesc
             )
             SearchInfoItem(
-                title       = strings.searchInfoHashTitle,                     // ← "Hash"
-                description = strings.searchInfoHashDesc
+                title       = strings.history.searchInfoHashTitle,                     // ← "Hash"
+                description = strings.history.searchInfoHashDesc
             )
             SearchInfoItem(
-                title       = strings.searchInfoPreimageTitle,                 // ← "Preimage"
-                description = strings.searchInfoPreimageDesc
+                title       = strings.history.searchInfoPreimageTitle,                 // ← "Preimage"
+                description = strings.history.searchInfoPreimageDesc
             )
             SearchInfoItem(
-                title       = strings.searchInfoNodeAliasTitle,                // ← "Node alias"
-                description = strings.searchInfoNodeAliasDesc
+                title       = strings.history.searchInfoNodeAliasTitle,                // ← "Node alias"
+                description = strings.history.searchInfoNodeAliasDesc
             )
             SearchInfoItem(
-                title       = strings.searchInfoNodeIdTitle,                   // ← "Node ID (pubkey)"
-                description = strings.searchInfoNodeIdDesc
+                title       = strings.history.searchInfoNodeIdTitle,                   // ← "Node ID (pubkey)"
+                description = strings.history.searchInfoNodeIdDesc
             )
 
             Spacer(Modifier.height(16.dp))
             Text(
-                text  = strings.searchInfoFooter,                              // ← "You can paste a full value…"
+                text  = strings.history.searchInfoFooter,                              // ← "You can paste a full value…"
                 style = MaterialTheme.typography.bodySmall,
                 color = MaterialTheme.colorScheme.onSurfaceVariant
             )

app/src/main/java/com/bitcointxoko/gudariwallet/ui/lock/BiometricLockScreen.kt

@@ -0,0 +1,111 @@
+package com.bitcointxoko.gudariwallet.ui.lock
+
+import androidx.biometric.BiometricManager
+import androidx.biometric.BiometricPrompt
+import androidx.compose.foundation.layout.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Fingerprint
+import androidx.compose.material3.*
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import androidx.core.content.ContextCompat
+import androidx.fragment.app.FragmentActivity
+import com.bitcointxoko.gudariwallet.LocalAppStrings
+import com.bitcointxoko.gudariwallet.i18n.LockStrings
+
+@Composable
+fun BiometricLockScreen(onUnlocked: () -> Unit) {
+    val context = LocalContext.current
+    val activity = context as FragmentActivity
+    val strings = LocalAppStrings.current.lock
+
+    LaunchedEffect(Unit) {
+        showBiometricPrompt(activity, onUnlocked, strings)
+    }
+
+    Scaffold { innerPadding ->
+        Box(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(innerPadding),
+            contentAlignment = Alignment.Center
+        ) {
+            Column(
+                horizontalAlignment = Alignment.CenterHorizontally,
+                verticalArrangement = Arrangement.Center,
+                modifier = Modifier.padding(horizontal = 32.dp)
+            ) {
+                Icon(
+                    imageVector = Icons.Filled.Fingerprint,
+                    contentDescription = null,
+                    modifier = Modifier.size(64.dp),
+                    tint = MaterialTheme.colorScheme.primary
+                )
+
+                Spacer(Modifier.height(24.dp))
+
+                Text(
+                    text = strings.appName,
+                    style = MaterialTheme.typography.displaySmall,
+                    color = MaterialTheme.colorScheme.onBackground,
+                    textAlign = TextAlign.Center
+                )
+
+                Spacer(Modifier.height(8.dp))
+
+                Text(
+                    text = strings.authenticateToContinue,
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    textAlign = TextAlign.Center
+                )
+
+                Spacer(Modifier.height(32.dp))
+
+                FilledTonalButton(
+                    onClick = { showBiometricPrompt(activity, onUnlocked, strings) }
+                ) {
+                    Icon(
+                        imageVector = Icons.Filled.Fingerprint,
+                        contentDescription = null,
+                        modifier = Modifier.size(ButtonDefaults.IconSize)
+                    )
+                    Spacer(Modifier.width(ButtonDefaults.IconSpacing))
+                    Text(strings.unlockButton)
+                }
+            }
+        }
+    }
+}
+
+private fun showBiometricPrompt(
+    activity: FragmentActivity,
+    onUnlocked: () -> Unit,
+    strings: LockStrings
+) {
+    val executor = ContextCompat.getMainExecutor(activity)
+
+    val callback = object : BiometricPrompt.AuthenticationCallback() {
+        override fun onAuthenticationSucceeded(result: BiometricPrompt.AuthenticationResult) {
+            onUnlocked()
+        }
+    }
+
+    val prompt = BiometricPrompt(activity, executor, callback)
+
+    val promptInfo = BiometricPrompt.PromptInfo.Builder()
+        .setTitle(strings.biometricPromptTitle)
+        .setSubtitle(strings.biometricPromptSubtitle)
+        .setAllowedAuthenticators(
+            BiometricManager.Authenticators.BIOMETRIC_STRONG
+                    or BiometricManager.Authenticators.DEVICE_CREDENTIAL
+        )
+        .build()
+
+    prompt.authenticate(promptInfo)
+}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/nfc/NdefHceService.kt

@@ -77,13 +77,12 @@ class NdefHceService : HostApduService() {
 
         val ins = apdu[1]
 
-        return when {
+        return when (ins) {
             // ── SELECT (INS = 0xA4) ──────────────────────────────────────────
-            ins == 0xA4.toByte() -> handleSelect(apdu)
+            0xA4.toByte() -> handleSelect(apdu)
 
             // ── READ BINARY (INS = 0xB0) ─────────────────────────────────────
-            ins == 0xB0.toByte() -> handleReadBinary(apdu)
-
+            0xB0.toByte() -> handleReadBinary(apdu)
             else -> SW_UNKNOWN
         }.also { Timber.d("APDU OUT: ${it.toHex()}") }
     }

app/src/main/java/com/bitcointxoko/gudariwallet/ui/nfc/NfcViewModel.kt

@@ -13,7 +13,6 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.bitcointxoko.gudariwallet.ui.NfcOfferState
 import com.bitcointxoko.gudariwallet.util.SendInputDetector
-import com.bitcointxoko.gudariwallet.util.SendInputType
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -83,7 +82,7 @@ class NfcViewModel : ViewModel() {
             intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES)
         }
 
-        if (rawMessages != null && rawMessages.isNotEmpty()) {
+        if (!rawMessages.isNullOrEmpty()) {
             val message = rawMessages[0] as NdefMessage
             val uri = extractUri(message)
             if (uri != null) {
@@ -98,7 +97,7 @@ class NfcViewModel : ViewModel() {
             intent.getParcelableExtra(NfcAdapter.EXTRA_TAG, Tag::class.java)
         } else {
             @Suppress("DEPRECATION")
-            intent.getParcelableExtra<Tag>(NfcAdapter.EXTRA_TAG)
+            intent.getParcelableExtra(NfcAdapter.EXTRA_TAG)
         }
         if (tag != null) {
             viewModelScope.launch(Dispatchers.IO) {

app/src/main/java/com/bitcointxoko/gudariwallet/ui/nwc/NwcAddConnectionSheet.kt

@@ -0,0 +1,390 @@
+package com.bitcointxoko.gudariwallet.ui.nwc
+
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Add
+import androidx.compose.material.icons.filled.CalendarToday
+import androidx.compose.material.icons.filled.Close
+import androidx.compose.material.icons.filled.Schedule
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.unit.dp
+import com.bitcointxoko.gudariwallet.api.NwcNewBudget
+import com.bitcointxoko.gudariwallet.i18n.AppStrings
+import com.bitcointxoko.gudariwallet.strings
+import java.time.LocalDateTime
+import java.time.ZoneId
+import java.time.format.DateTimeFormatter
+import java.util.Locale
+
+@Stable
+private class AddConnectionState {
+    var description         by mutableStateOf("")
+    var selectedPermissions by mutableStateOf(
+        ALL_PERMISSIONS.filter { it.default }.map { it.serverKey }.toSet()
+    )
+    var neverExpires        by mutableStateOf(false)
+    var expiry: LocalDateTime by mutableStateOf(
+        LocalDateTime.now().plusDays(30).withSecond(0).withNano(0)
+    )
+    var showDatePicker      by mutableStateOf(false)
+    var showTimePicker      by mutableStateOf(false)
+    var nextBudgetId        by mutableIntStateOf(0)
+    var budgets             by mutableStateOf(emptyList<BudgetDraft>())
+
+    // Converts the LocalDateTime expiry to a Unix epoch in seconds
+    fun expiryEpochSeconds(): Long =
+        expiry.atZone(ZoneId.systemDefault()).toEpochSecond()
+}
+
+private fun NwcPermission.displayLabel(strings: AppStrings): String = when (serverKey) {
+    "pay"     -> strings.nwc.permPay
+    "invoice" -> strings.nwc.permInvoice
+    "lookup"  -> strings.nwc.permLookup
+    "history" -> strings.nwc.permHistory
+    "balance" -> strings.nwc.permBalance
+    "info"    -> strings.nwc.permInfo
+    else      -> serverKey
+}
+
+// ── Sheet ─────────────────────────────────────────────────────────────────────
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+internal fun NwcAddConnectionSheet(
+    isCreating : Boolean,
+    onCreate   : (
+        description : String,
+        permissions : List<String>,
+        expiresAt   : Long,
+        budgets     : List<NwcNewBudget>
+    ) -> Unit,
+    onDismiss  : () -> Unit
+) {
+    val sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true)
+    val state      = remember { AddConnectionState() }
+
+
+    if (state.showDatePicker) {
+        val initialMillis = state.expiry
+            .atZone(ZoneId.systemDefault())
+            .toInstant()
+            .toEpochMilli()
+        val datePickerState = rememberDatePickerState(
+            initialSelectedDateMillis = initialMillis
+        )
+        DatePickerDialog(
+            onDismissRequest = { state.showDatePicker = false },
+            confirmButton = {
+                TextButton(onClick = {
+                    datePickerState.selectedDateMillis?.let { millis ->
+                        val picked = java.time.Instant
+                            .ofEpochMilli(millis)
+                            .atZone(ZoneId.systemDefault())
+                            .toLocalDate()
+                        state.expiry = state.expiry
+                            .withYear(picked.year)
+                            .withMonth(picked.monthValue)
+                            .withDayOfMonth(picked.dayOfMonth)
+                    }
+                    state.showDatePicker = false
+                }) { Text(strings.nwc.ok) }
+            },
+            dismissButton = {
+                TextButton(onClick = { state.showDatePicker = false }) { Text(strings.nwc.cancel) }
+            }
+        ) { DatePicker(state = datePickerState) }
+    }
+
+    if (state.showTimePicker) {
+        val timePickerState = rememberTimePickerState(
+            initialHour   = state.expiry.hour,
+            initialMinute = state.expiry.minute,
+            is24Hour      = true
+        )
+        AlertDialog(
+            onDismissRequest = { state.showTimePicker = false },
+            confirmButton = {
+                TextButton(onClick = {
+                    state.expiry = state.expiry
+                        .withHour(timePickerState.hour)
+                        .withMinute(timePickerState.minute)
+                        .withSecond(0)
+                        .withNano(0)
+                    state.showTimePicker = false
+                }) { Text(strings.nwc.ok) }
+            },
+            dismissButton = {
+                TextButton(onClick = { state.showTimePicker = false }) { Text(strings.nwc.cancel) }
+            },
+            text = { TimePicker(state = timePickerState) }
+        )
+    }
+
+    ModalBottomSheet(
+        onDismissRequest = onDismiss,
+        sheetState       = sheetState
+    ) {
+        Column(
+            modifier            = Modifier
+                .fillMaxWidth()
+                .verticalScroll(rememberScrollState())
+                .padding(horizontal = 24.dp)
+                .padding(bottom = 32.dp),
+            verticalArrangement = Arrangement.spacedBy(16.dp)
+        ) {
+            Text(
+                text  = strings.nwc.newConnection,
+                style = MaterialTheme.typography.titleMedium
+            )
+
+            // ── Description ──────────────────────────────────────────────────
+            OutlinedTextField(
+                value         = state.description,
+                onValueChange = { state.description = it },
+                label         = { Text(strings.nwc.labelHint) },
+                singleLine    = true,
+                modifier      = Modifier.fillMaxWidth()
+            )
+
+            // ── Expiry ───────────────────────────────────────────────────────
+            Row(
+                modifier          = Modifier.fillMaxWidth(),
+                verticalAlignment = Alignment.CenterVertically,
+            ) {
+                Text(text = strings.nwc.expires, style = MaterialTheme.typography.bodyMedium)
+                Spacer(Modifier.weight(1f))
+
+                if (!state.neverExpires) {
+                    val dateLabel = remember(state.expiry) {
+                        DateTimeFormatter.ofPattern("dd MMM yyyy", Locale.getDefault()).format(state.expiry)
+                    }
+                    SuggestionChip(
+                        onClick = { state.showDatePicker = true },
+                        label   = { Text(dateLabel, style = MaterialTheme.typography.bodySmall) },
+                        icon    = {
+                            Icon(
+                                imageVector        = Icons.Default.CalendarToday,
+                                contentDescription = strings.nwc.pickDate,
+                                modifier           = Modifier.size(16.dp)
+                            )
+                        }
+                    )
+                    Spacer(Modifier.weight(1f))
+                    val timeLabel = remember(state.expiry) {
+                        DateTimeFormatter.ofPattern("HH:mm", Locale.getDefault()).format(state.expiry)
+                    }
+                    SuggestionChip(
+                        onClick = { state.showTimePicker = true },
+                        label   = { Text(timeLabel, style = MaterialTheme.typography.bodySmall) },
+                        icon    = {
+                            Icon(
+                                imageVector        = Icons.Default.Schedule,
+                                contentDescription = strings.nwc.pickTime,
+                                modifier           = Modifier.size(16.dp)
+                            )
+                        }
+                    )
+                }
+
+                Spacer(Modifier.weight(1f))
+                Checkbox(
+                    checked         = state.neverExpires,
+                    onCheckedChange = { state.neverExpires = it }
+                )
+                Text(text = strings.nwc.never, style = MaterialTheme.typography.bodyMedium)
+            }
+
+            Row(
+                modifier          = Modifier.fillMaxWidth(),
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                Text(
+                    text  = strings.nwc.budgets,
+                    style = MaterialTheme.typography.labelLarge,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant
+                )
+                Spacer(Modifier.weight(1f))
+                TextButton(
+                    onClick = {
+                        state.budgets += BudgetDraft(id = state.nextBudgetId)
+                        state.nextBudgetId++
+                    }
+                ) {
+                    Icon(
+                        imageVector        = Icons.Default.Add,
+                        contentDescription = strings.nwc.addBudget,
+                        modifier           = Modifier.size(16.dp)
+                    )
+                    Spacer(Modifier.width(4.dp))
+                    Text(strings.nwc.addBudget)
+                }
+            }
+
+            state.budgets.forEach { draft ->
+                key(draft.id) {
+                    BudgetRow(
+                        draft    = draft,
+                        onChange = { updated ->
+                            state.budgets = state.budgets.map { if (it.id == draft.id) updated else it }
+                        },
+                        onRemove = {
+                            state.budgets = state.budgets.filter { it.id != draft.id }
+                        }
+                    )
+                }
+            }
+
+            // ── Permissions ──────────────────────────────────────────────────
+            Text(
+                text  = strings.nwc.permissions,
+                style = MaterialTheme.typography.labelLarge,
+                color = MaterialTheme.colorScheme.onSurfaceVariant
+            )
+            ALL_PERMISSIONS.forEach { perm ->
+                key(perm.serverKey) {
+                    val checked = perm.serverKey in state.selectedPermissions
+                    Row(
+                        modifier          = Modifier.fillMaxWidth(),
+                        verticalAlignment = Alignment.CenterVertically
+                    ) {
+                        Checkbox(
+                            checked         = checked,
+                            onCheckedChange = { on ->
+                                state.selectedPermissions = if (on)
+                                    state.selectedPermissions + perm.serverKey
+                                else
+                                    state.selectedPermissions - perm.serverKey
+                            }
+                        )
+                        Spacer(Modifier.width(8.dp))
+                        Text(text = perm.displayLabel(strings), style = MaterialTheme.typography.bodyMedium)
+                    }
+                }
+            }
+            val unnamed = strings.nwc.unnamed
+            // ── Create button ─────────────────────────────────────────────────
+            Button(
+                onClick  = {
+                    val expiresAtSecs = if (state.neverExpires) 0L
+                    else state.expiryEpochSeconds()   // #10
+                    val validBudgets  = state.budgets.mapNotNull { it.toNwcNewBudget() }
+                    onCreate(
+                        state.description.trim().ifBlank { unnamed },
+                        state.selectedPermissions.toList(),
+                        expiresAtSecs,
+                        validBudgets
+                    )
+                },
+                enabled  = state.selectedPermissions.isNotEmpty() && !isCreating,
+                modifier = Modifier.fillMaxWidth()
+            ) {
+                if (isCreating) {
+                    CircularProgressIndicator(
+                        modifier    = Modifier.size(18.dp),
+                        strokeWidth = 2.dp,
+                        color       = MaterialTheme.colorScheme.onPrimary
+                    )
+                    Spacer(Modifier.width(8.dp))
+                }
+                Text(if (isCreating) strings.nwc.creating else strings.nwc.createConnection)
+            }
+        }
+    }
+}
+
+// ── Budget row ────────────────────────────────────────────────────────────────
+
+@Composable
+fun BudgetRefreshWindow.displayLabel(strings: AppStrings): String = when (this) {
+    BudgetRefreshWindow.DAILY -> strings.nwc.refreshDaily
+    BudgetRefreshWindow.WEEKLY -> strings.nwc.refreshWeekly
+    BudgetRefreshWindow.MONTHLY -> strings.nwc.refreshMonthly
+    BudgetRefreshWindow.YEARLY -> strings.nwc.refreshYearly
+    BudgetRefreshWindow.NEVER -> strings.nwc.refreshNever
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+private fun BudgetRow(
+    draft    : BudgetDraft,
+    onChange : (BudgetDraft) -> Unit,
+    onRemove : () -> Unit
+) {
+    var dropdownExpanded by remember { mutableStateOf(false) }
+    val fieldHeight = 64.dp
+
+    Surface(
+        shape          = MaterialTheme.shapes.medium,
+        tonalElevation = 2.dp,
+        modifier       = Modifier.fillMaxWidth()
+    ) {
+        Row(
+            modifier              = Modifier
+                .fillMaxWidth()
+                .padding(horizontal = 12.dp, vertical = 8.dp),
+            verticalAlignment     = Alignment.CenterVertically,
+            horizontalArrangement = Arrangement.spacedBy(8.dp)
+        ) {
+            OutlinedTextField(
+                value           = draft.amountSats,
+                onValueChange   = { onChange(draft.copy(amountSats = it.filter(Char::isDigit))) },
+                label           = { Text(strings.nwc.sats) },
+                singleLine      = true,
+                keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
+                modifier        = Modifier.weight(1f).height(fieldHeight)
+            )
+
+            ExposedDropdownMenuBox(
+                expanded         = dropdownExpanded,
+                onExpandedChange = { dropdownExpanded = it },
+                modifier         = Modifier.weight(1f).height(fieldHeight)
+            ) {
+                OutlinedTextField(
+                    value        = draft.refreshWindow.displayLabel(strings),
+                    onValueChange = {},
+                    readOnly     = true,
+                    label        = { Text(strings.nwc.resets) },
+                    trailingIcon = {
+                        ExposedDropdownMenuDefaults.TrailingIcon(expanded = dropdownExpanded)
+                    },
+                    modifier     = Modifier
+                        .menuAnchor(type = ExposedDropdownMenuAnchorType.PrimaryNotEditable, enabled = true)
+                        .fillMaxWidth()
+                        .height(fieldHeight)
+                )
+                ExposedDropdownMenu(
+                    expanded         = dropdownExpanded,
+                    onDismissRequest = { dropdownExpanded = false }
+                ) {
+                    BudgetRefreshWindow.entries.forEach { window ->
+                        DropdownMenuItem(
+                            text    = { Text(window.displayLabel(strings)) },
+                            onClick = {
+                                onChange(draft.copy(refreshWindow = window))
+                                dropdownExpanded = false
+                            }
+                        )
+                    }
+                }
+            }
+
+            IconButton(
+                onClick  = onRemove,
+                modifier = Modifier.size(fieldHeight)
+            ) {
+                Icon(
+                    imageVector        = Icons.Default.Close,
+                    contentDescription = strings.nwc.removeBudget,
+                    tint               = MaterialTheme.colorScheme.error
+                )
+            }
+        }
+    }
+}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/nwc/NwcConnectionRow.kt

@@ -0,0 +1,165 @@
+package com.bitcointxoko.gudariwallet.ui.nwc
+
+import android.os.Build
+import androidx.annotation.RequiresApi
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.KeyboardArrowRight
+import androidx.compose.material.icons.filled.Cable
+import androidx.compose.material.icons.filled.Delete
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import com.bitcointxoko.gudariwallet.api.NwcGetResponse
+import com.bitcointxoko.gudariwallet.strings
+import com.bitcointxoko.gudariwallet.ui.theme.semanticColors
+import com.bitcointxoko.gudariwallet.util.formatEpochShort
+import com.bitcointxoko.gudariwallet.util.isToday
+import com.bitcointxoko.gudariwallet.util.isYesterday
+import kotlinx.coroutines.launch
+import java.time.Instant
+
+@RequiresApi(Build.VERSION_CODES.UPSIDE_DOWN_CAKE)
+@Composable
+internal fun NwcConnectionRow(
+    connection: NwcGetResponse,
+    isDeleting: Boolean,
+    onDeleteConfirm: () -> Unit,
+    onConnectionClick: () -> Unit,
+    modifier: Modifier = Modifier
+) {
+    val key     = connection.data
+    val expired = key.expires_at > 0 && key.expires_at < Instant.now().epochSecond
+    val semantic = semanticColors()
+
+    // ── Swipe-to-delete state ────────────────────────────────────────────────
+    val dismissState = rememberSwipeToDismissBoxState(
+        confirmValueChange = {
+            // Always reject — we never want the row to stay dismissed.
+            // The dialogue is triggered via LaunchedEffect on targetValue below.
+            false
+        },
+        positionalThreshold = { totalDistance -> totalDistance * 0.4f }
+    )
+
+    // targetValue changes to EndToStart as soon as the drag crosses the
+    // threshold, even though confirmValueChange returns false and currentValue
+    // stays at Settled. Use a flag so we only fire once per swipe gesture.
+    var dialogTriggered by remember { mutableStateOf(false) }
+    val scope = rememberCoroutineScope()
+
+// Fires when the swipe crosses the threshold — trigger confirm dialogue
+    LaunchedEffect(dismissState.targetValue) {
+        if (dismissState.targetValue == SwipeToDismissBoxValue.EndToStart
+            && !isDeleting
+            && !dialogTriggered
+        ) {
+            dialogTriggered = true
+            onDeleteConfirm()
+            // Reset in its own scope — won't be cancelled when targetValue changes back
+            scope.launch { dismissState.reset() }
+        }
+    }
+
+// Fires when the row has fully snapped back — re-arm for next swipe
+    LaunchedEffect(dismissState.currentValue) {
+        if (dismissState.currentValue == SwipeToDismissBoxValue.Settled) {
+            dialogTriggered = false
+        }
+    }
+
+    SwipeToDismissBox(
+        state                       = dismissState,
+        modifier                    = modifier,
+        enableDismissFromStartToEnd = false,
+        enableDismissFromEndToStart = !isDeleting,
+        backgroundContent = {
+            val fraction = dismissState.progress
+            val bgAlpha  = (fraction / 0.4f).coerceIn(0f, 1f)
+            Box(
+                modifier = Modifier
+                    .fillMaxSize()
+                    .background(MaterialTheme.colorScheme.error.copy(alpha = bgAlpha))
+                    .padding(end = 24.dp),
+                contentAlignment = Alignment.CenterEnd
+            ) {
+                Icon(
+                    imageVector        = Icons.Default.Delete,
+                    contentDescription = strings.nwc.deleteConnection,
+                    tint               = MaterialTheme.colorScheme.onError.copy(alpha = bgAlpha)
+                )
+            }
+        }
+    ) {
+        Row(
+            modifier = Modifier
+                .fillMaxWidth()
+                .background(MaterialTheme.colorScheme.surface)
+                .clickable(onClick = onConnectionClick)
+                .padding(horizontal = 16.dp, vertical = 12.dp),
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Icon(
+                imageVector        = Icons.Default.Cable,
+                contentDescription = null,
+                tint               = if (expired)
+                    MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.4f)
+                else
+                    MaterialTheme.colorScheme.primary,
+                modifier           = Modifier.size(20.dp)
+            )
+            Spacer(Modifier.width(12.dp))
+            Column(modifier = Modifier.weight(1f)) {
+                Text(
+                    text     = key.description.ifBlank { strings.nwc.unnamedConnection },
+                    style    = MaterialTheme.typography.bodyMedium,
+                    maxLines = 1,
+                    overflow = TextOverflow.Ellipsis,
+                    color    = if (expired)
+                        MaterialTheme.colorScheme.onSurface.copy(alpha = 0.5f)
+                    else
+                        MaterialTheme.colorScheme.onSurface
+                )
+                Spacer(Modifier.height(2.dp))
+                val lastUsedText = when {
+                    key.last_used <= 0L -> strings.nwc.neverUsed
+                    isToday(key.last_used)     -> strings.nwc.lastUsedToday
+                    isYesterday(key.last_used) -> strings.nwc.lastUsedYesterday
+                    else -> strings.nwc.lastUsedDate.format(formatEpochShort(key.last_used, strings.today, strings.yesterday))
+                }
+                Text(
+                    text  = if (key.last_used <= 0L) strings.nwc.neverUsed
+                    else lastUsedText,
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant
+                )
+                if (expired) {
+                    Spacer(Modifier.height(4.dp))
+                    Surface(
+                        shape        = MaterialTheme.shapes.extraSmall,
+                        color        = semantic.errorContainer,
+                        contentColor = semantic.onErrorContainer
+                    ) {
+                        Text(
+                            text     = strings.nwc.expired,
+                            style    = MaterialTheme.typography.labelSmall,
+                            modifier = Modifier.padding(horizontal = 6.dp, vertical = 2.dp)
+                        )
+                    }
+                }
+            }
+            Spacer(Modifier.width(8.dp))
+            Icon(
+                imageVector        = Icons.AutoMirrored.Default.KeyboardArrowRight,
+                contentDescription = null,
+                tint               = MaterialTheme.colorScheme.onSurfaceVariant.copy(alpha = 0.5f),
+                modifier           = Modifier.size(16.dp)
+            )
+        }
+    }
+}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/nwc/NwcDetailScreen.kt

@@ -0,0 +1,535 @@
+package com.bitcointxoko.gudariwallet.ui.nwc
+
+import android.content.ClipData
+import androidx.compose.foundation.BorderStroke
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.automirrored.filled.List
+import androidx.compose.material.icons.filled.AccountBalanceWallet
+import androidx.compose.material.icons.filled.ArrowDownward
+import androidx.compose.material.icons.filled.ArrowUpward
+import androidx.compose.material.icons.filled.Draw
+import androidx.compose.material.icons.filled.Info
+import androidx.compose.material.icons.filled.Key
+import androidx.compose.material.icons.filled.Link
+import androidx.compose.material.icons.filled.LinkOff
+import androidx.compose.material.icons.filled.Search
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.ButtonDefaults
+import androidx.compose.material3.Card
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.LinearProgressIndicator
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedButton
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.platform.ClipEntry
+import androidx.compose.ui.platform.LocalClipboard
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import com.bitcointxoko.gudariwallet.LocalAppStrings
+import com.bitcointxoko.gudariwallet.i18n.AppStrings
+import com.bitcointxoko.gudariwallet.ui.common.DetailRow
+import com.bitcointxoko.gudariwallet.ui.common.DetailSection
+import com.bitcointxoko.gudariwallet.util.formatEpoch
+import kotlinx.coroutines.launch
+
+// ── ConnectionDetailScreen.kt ─────────────────────────────────────────────────
+//
+// Displays a Nostr Wallet Connect (NWC) connection and its associated budgets.
+// Modelled on PaymentDetailScreen; reuses DetailSection / DetailRow / StatusChip
+// from the same UI kit.
+//
+// bitcoin.design guidelines applied:
+//  • Hero card surfaces the most important identity info (wallet + description)
+//    with a clear active/expired status chip — users know at a glance whether
+//    the connection is live.
+//  • Permissions are shown as individual readable rows, not a raw comma string.
+//  • Budget progress uses a LinearProgressIndicator so spending headroom is
+//    immediately scannable without arithmetic.
+//  • Timestamps are human-readable; raw pubkeys are truncated + copyable.
+//  • Destructive "Revoke" action is placed at the bottom, separated from
+//    informational content, and uses errorContainer colours.
+// ─────────────────────────────────────────────────────────────────────────────
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun ConnectionDetailScreen(
+    connection : ConnectionData,   // data { pubkey, wallet, description, … }
+    budgets    : List<BudgetData>, // budgets [ { id, pubkey, budget_msats, … } ]
+    onBack     : () -> Unit,
+    onRevoke   : (() -> Unit)? = null   // optional – show Revoke button when provided
+) {
+    val strings   = LocalAppStrings.current
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text(strings.nwc.connectionDetailTitle) }, // ← "Connection"
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(
+                            imageVector        = Icons.AutoMirrored.Filled.ArrowBack,
+                            contentDescription = strings.nwc.back // ← "Back"
+                        )
+                    }
+                }
+            )
+        }
+    ) { padding ->
+        ConnectionDetailContent(
+            connection = connection,
+            budgets    = budgets,
+            onRevoke   = onRevoke,
+            modifier   = Modifier.padding(padding)
+        )
+    }
+}
+
+// ── Detail content ────────────────────────────────────────────────────────────
+
+@Composable
+private fun ConnectionDetailContent(
+    connection : ConnectionData,
+    budgets    : List<BudgetData>,
+    onRevoke   : (() -> Unit)?,
+    modifier   : Modifier = Modifier
+) {
+    val strings   = LocalAppStrings.current
+    val clipboard = LocalClipboard.current
+    val scope     = rememberCoroutineScope()
+
+    var showRevokeDialog by remember { mutableStateOf(false) }
+
+    val nowSeconds  = remember { System.currentTimeMillis() / 1_000L }
+    val isExpired   = connection.expiresAt > 0 && connection.expiresAt < nowSeconds
+    val permissions = connection.permissions
+
+    if (showRevokeDialog) {
+        AlertDialog(
+            onDismissRequest = { showRevokeDialog = false },
+            title   = { Text(strings.nwc.revokeDialogTitle) },
+            text    = { Text(strings.nwc.revokeDialogBody) },
+            confirmButton = {
+                TextButton(
+                    onClick = {
+                        showRevokeDialog = false
+                        onRevoke?.invoke()
+                    }
+                ) {
+                    Text(
+                        text  = strings.nwc.revokeDialogConfirm,
+                        color = MaterialTheme.colorScheme.error
+                    )
+                }
+            },
+            dismissButton = {
+                TextButton(onClick = { showRevokeDialog = false }) {
+                    Text(strings.nwc.revokeDialogDismiss)
+                }
+            }
+        )
+    }
+
+    LazyColumn(
+        modifier            = modifier.fillMaxSize(),
+        contentPadding      = PaddingValues(16.dp),
+        verticalArrangement = Arrangement.spacedBy(12.dp)
+    ) {
+
+        // ── Hero card ─────────────────────────────────────────────────────────
+        item {
+            Card(modifier = Modifier.fillMaxWidth()) {
+                Column(
+                    modifier            = Modifier
+                        .fillMaxWidth()
+                        .padding(24.dp),
+                    horizontalAlignment = Alignment.CenterHorizontally
+                ) {
+                    // App / wallet icon placeholder
+                    Surface(
+                        shape  = CircleShape,
+                        color  = MaterialTheme.colorScheme.secondaryContainer,
+                        modifier = Modifier.size(56.dp)
+                    ) {
+                        Icon(
+                            imageVector        = Icons.Default.Link,
+                            contentDescription = null,
+                            tint               = MaterialTheme.colorScheme.onSecondaryContainer,
+                            modifier           = Modifier
+                                .padding(14.dp)
+                                .fillMaxSize()
+                        )
+                    }
+
+                    Spacer(Modifier.height(12.dp))
+
+                    // Wallet name
+                    Text(
+                        text  = connection.description.ifBlank { strings.nwc.connectionUnknownWallet }, // ← "Unknown app"
+                        style = MaterialTheme.typography.headlineSmall,
+                        textAlign = TextAlign.Center
+                    )
+
+                    Spacer(Modifier.height(12.dp))
+
+                    // Active / Expired chip
+                    ConnectionStatusChip(isExpired = isExpired)
+                }
+            }
+        }
+
+        // ── Connection details ────────────────────────────────────────────────
+        item {
+            DetailSection(title = strings.nwc.connectionSectionDetails) { // ← "Details"
+
+                DetailRow(
+                    label = strings.nwc.connectionRowCreated, // ← "Connected"
+                    value = formatEpoch(connection.createdAt, strings.today, strings.yesterday)
+                )
+
+                DetailRow(
+                    label = strings.nwc.connectionRowLastUsed, // ← "Last used"
+                    value = if (connection.lastUsed > 0)
+                        formatEpoch(connection.lastUsed, strings.today, strings.yesterday)
+                    else
+                        strings.nwc.connectionNeverUsed // ← "Never"
+                )
+
+                DetailRow(
+                    label = strings.nwc.connectionRowExpires, // ← "Expires"
+                    value = when {
+                        connection.expiresAt <= 0 -> strings.nwc.connectionNoExpiry // ← "Never"
+                        isExpired                 -> strings.nwc.connectionExpired(  // ← "Expired · 12 Jan 2025"
+                            formatEpoch(connection.expiresAt, strings.today, strings.yesterday)
+                        )
+                        else                      -> formatEpoch(
+                            connection.expiresAt,
+                            strings.today,
+                            strings.yesterday
+                        )
+                    },
+                    // valueColor = if (isExpired) MaterialTheme.colorScheme.error else null
+                )
+
+                // Pubkey – truncated display, full value copyable
+                DetailRow(
+                    label    = strings.nwc.connectionRowPubkey, // ← "Public key"
+                    value    = "${connection.pubkey.take(8)}…${connection.pubkey.takeLast(8)}",
+                    monospace = true,
+                    copyable  = true,
+                    onCopy    = {
+                        scope.launch {
+                            clipboard.setClipEntry(
+                                ClipEntry(ClipData.newPlainText("pubkey", connection.pubkey))
+                            )
+                        }
+                    }
+                )
+            }
+        }
+
+        // ── Permissions ───────────────────────────────────────────────────────
+        if (permissions.isNotEmpty()) {
+            item {
+                DetailSection(title = strings.nwc.connectionSectionPermissions) {
+                    Column(verticalArrangement = Arrangement.spacedBy(0.dp)) {
+                        permissions.forEachIndexed { index, permission ->
+                            PermissionRow(permission = permission, strings)
+                            if (index < permissions.lastIndex) {
+                                HorizontalDivider(
+                                    color     = MaterialTheme.colorScheme.outlineVariant,
+                                    thickness = 0.5.dp
+                                )
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        // ── Budgets ───────────────────────────────────────────────────────────
+        if (budgets.isNotEmpty()) {
+            item {
+                Text(
+                    text     = strings.nwc.connectionSectionBudgets, // ← "Spending budgets"
+                    style    = MaterialTheme.typography.titleSmall,
+                    color    = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(horizontal = 4.dp)
+                )
+            }
+            items(budgets, key = { it.id }) { budget ->
+                BudgetCard(budget = budget)
+            }
+        }
+
+        // ── Revoke ────────────────────────────────────────────────────────────
+        if (onRevoke != null) {
+            item {
+                Spacer(Modifier.height(4.dp))
+                OutlinedButton(
+                    onClick  = { showRevokeDialog = true },
+                    colors   = ButtonDefaults.outlinedButtonColors(
+                        contentColor = MaterialTheme.colorScheme.error
+                    ),
+                    border   = BorderStroke(1.dp, MaterialTheme.colorScheme.error),
+                    modifier = Modifier.fillMaxWidth()
+                ) {
+                    Icon(
+                        imageVector        = Icons.Default.LinkOff,
+                        contentDescription = null,
+                        modifier           = Modifier.size(18.dp)
+                    )
+                    Spacer(Modifier.width(8.dp))
+                    Text(strings.nwc.connectionRevoke) // ← "Revoke connection"
+                }
+            }
+        }
+    }
+}
+
+// ── Budget card ───────────────────────────────────────────────────────────────
+
+@Composable
+private fun BudgetCard(budget: BudgetData) {
+    val strings = LocalAppStrings.current
+
+    val totalSats = budget.budgetMsats / 1_000L
+    val usedSats  = budget.usedBudgetMsats / 1_000L
+    val progress = if (budget.budgetMsats > 0)
+        (1f - budget.usedBudgetMsats.toFloat() / budget.budgetMsats.toFloat()).coerceIn(0f, 1f)
+    else 0f
+    val isOverBudget = budget.usedBudgetMsats > budget.budgetMsats
+
+    Card(modifier = Modifier.fillMaxWidth()) {
+        Column(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(16.dp),
+            verticalArrangement = Arrangement.spacedBy(8.dp)
+        ) {
+
+            // Refresh window label  e.g. "Daily budget"
+            Text(
+                text  = strings.nwc.connectionBudgetTitle(           // ← "Daily budget"
+                    formatRefreshWindow(budget.refreshWindow)
+                ),
+                style = MaterialTheme.typography.titleSmall
+            )
+
+            // Progress bar
+            LinearProgressIndicator(
+                progress = { progress },
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .height(6.dp)
+                    .clip(RoundedCornerShape(3.dp)),
+                color    = if (isOverBudget)
+                    MaterialTheme.colorScheme.error
+                else
+                    MaterialTheme.colorScheme.primary,
+                trackColor = MaterialTheme.colorScheme.surfaceVariant
+            )
+
+            // Used / Total
+            Row(
+                modifier       = Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.SpaceBetween
+            ) {
+                Text(
+                    text  = strings.nwc.connectionBudgetUsed(usedSats),  // ← "Used: 1,200 sats"
+                    style = MaterialTheme.typography.bodySmall,
+                    color = if (isOverBudget)
+                        MaterialTheme.colorScheme.error
+                    else
+                        MaterialTheme.colorScheme.onSurfaceVariant
+                )
+                Text(
+                    text  = strings.nwc.connectionBudgetTotal(totalSats), // ← "of 10,000 sats"
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant
+                )
+            }
+
+            // Created at
+            DetailRow(
+                label = strings.nwc.connectionRowCreated, // ← "Created"
+                value = formatEpoch(budget.createdAt, strings.today, strings.yesterday)
+            )
+        }
+    }
+}
+
+// ── Permission row ────────────────────────────────────────────────────────────
+
+@Composable
+private fun PermissionRow(permission: ConnectionPermission, strings: AppStrings) {
+    Row(
+        modifier              = Modifier
+            .fillMaxWidth()
+            .padding(vertical = 10.dp, horizontal = 4.dp),
+        verticalAlignment     = Alignment.CenterVertically,
+        horizontalArrangement = Arrangement.spacedBy(12.dp)
+    ) {
+        Surface(
+            shape    = CircleShape,
+            color    = MaterialTheme.colorScheme.primaryContainer,
+            modifier = Modifier.size(32.dp)
+        ) {
+            Icon(
+                imageVector        = permission.icon,
+                contentDescription = null,
+                tint               = MaterialTheme.colorScheme.onPrimaryContainer,
+                modifier           = Modifier
+                    .padding(7.dp)
+                    .fillMaxSize()
+            )
+        }
+        Text(
+            text     = permission.label(strings),   // already localized
+            style    = MaterialTheme.typography.bodyMedium,
+            modifier = Modifier.weight(1f)
+        )
+    }
+}
+
+// ── Status chip ───────────────────────────────────────────────────────────────
+
+@Composable
+private fun ConnectionStatusChip(isExpired: Boolean) {
+    val strings = LocalAppStrings.current
+    Surface(
+        shape = RoundedCornerShape(50),
+        color = if (isExpired)
+            MaterialTheme.colorScheme.errorContainer
+        else
+            MaterialTheme.colorScheme.primaryContainer
+    ) {
+        Text(
+            text     = if (isExpired) strings.nwc.connectionStatusExpired  // ← "Expired"
+            else           strings.nwc.connectionStatusActive,   // ← "Active"
+            style    = MaterialTheme.typography.labelSmall,
+            color    = if (isExpired)
+                MaterialTheme.colorScheme.onErrorContainer
+            else
+                MaterialTheme.colorScheme.onPrimaryContainer,
+            modifier = Modifier.padding(horizontal = 10.dp, vertical = 4.dp)
+        )
+    }
+}
+
+// ── Helpers ───────────────────────────────────────────────────────────────────
+
+/**
+ * Converts a refresh_window value (seconds) to a human-readable label.
+ * Common NWC values: 86400 = daily, 604800 = weekly, 2592000 = monthly.
+ */
+private fun formatRefreshWindow(seconds: Long): String = when (seconds) {
+    0L        -> "One-time"
+    86_400L   -> "Daily"
+    604_800L  -> "Weekly"
+    2_592_000L -> "Monthly"
+    else      -> "${seconds / 86_400} days"
+}
+
+/**
+ * Maps a raw NWC method string to a friendly label.
+ * Extend as your permission set grows.
+ */
+@Composable
+private fun formatPermissionLabel(permission: String, strings: AppStrings): String =
+    when (permission.trim().lowercase()) {
+        "pay_invoice"          -> strings.nwc.permPayInvoice          // ← "Pay invoices"
+        "get_balance"          -> strings.nwc.permGetBalance          // ← "Read balance"
+        "get_info"             -> strings.nwc.permGetInfo             // ← "Read wallet info"
+        "make_invoice"         -> strings.nwc.permMakeInvoice         // ← "Create invoices"
+        "lookup_invoice"       -> strings.nwc.permLookupInvoice       // ← "Look up invoices"
+        "list_transactions"    -> strings.nwc.permListTransactions    // ← "View transaction history"
+        "sign_message"         -> strings.nwc.permSignMessage         // ← "Sign messages"
+        else                   -> permission                       // fallback: raw string
+    }
+
+/** Maps a permission string to a representative icon. */
+private fun permissionIcon(permission: String): ImageVector =
+    when (permission.trim().lowercase()) {
+        "pay_invoice"       -> Icons.Default.ArrowUpward
+        "get_balance"       -> Icons.Default.AccountBalanceWallet
+        "get_info"          -> Icons.Default.Info
+        "make_invoice"      -> Icons.Default.ArrowDownward
+        "lookup_invoice"    -> Icons.Default.Search
+        "list_transactions" -> Icons.AutoMirrored.Filled.List
+        "sign_message"      -> Icons.Default.Draw
+        else                -> Icons.Default.Key
+    }
+
+// ── Data models (if not already defined elsewhere) ───────────────────────────
+
+data class ConnectionData(
+    val pubkey      : String,
+    val wallet      : String,
+    val description : String,
+    val expiresAt   : Long,   // Unix seconds; 0 = no expiry
+    val permissions : List<ConnectionPermission>,
+    val createdAt   : Long,   // Unix seconds
+    val lastUsed    : Long    // Unix seconds; 0 = never
+)
+
+/**
+ * A resolved permission — produced by matching NwcKey.permissions against
+ * ALL_PERMISSIONS and carrying only what the detail screen needs.
+ */
+data class ConnectionPermission(
+    val serverKey    : String,       // "pay", "invoice", "lookup", etc.
+    val icon         : ImageVector
+)
+
+internal fun ConnectionPermission.label(strings: AppStrings): String =
+    when (serverKey) {
+        "pay"     -> strings.nwc.permSendPayments           // "Send payments"
+        "invoice" -> strings.nwc.permCreateInvoices         // "Create invoices"
+        "lookup"  -> strings.nwc.permLookupInvoiceStatus    // "Lookup status of invoice"
+        "history" -> strings.nwc.permReadTransactionHistory // "Read transaction history"
+        "balance" -> strings.nwc.permReadWalletBalance      // "Read wallet balance"
+        "info"    -> strings.nwc.permReadAccountInfo        // "Read account info"
+        else      -> serverKey
+    }
+
+data class BudgetData(
+    val id               : Long,
+    val pubkey           : String,
+    val budgetMsats      : Long,
+    val refreshWindow    : Long,  // seconds
+    val createdAt        : Long,
+    val usedBudgetMsats  : Long
+)

app/src/main/java/com/bitcointxoko/gudariwallet/ui/nwc/NwcMappings.kt

@@ -0,0 +1,73 @@
+package com.bitcointxoko.gudariwallet.ui.nwc
+
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.AccountBalanceWallet
+import androidx.compose.material.icons.filled.ArrowDownward
+import androidx.compose.material.icons.filled.ArrowUpward
+import androidx.compose.material.icons.filled.Info
+import androidx.compose.material.icons.filled.Key
+import androidx.compose.material.icons.filled.List
+import androidx.compose.material.icons.filled.Search
+import androidx.compose.ui.graphics.vector.ImageVector
+import com.bitcointxoko.gudariwallet.api.NwcBudget
+import com.bitcointxoko.gudariwallet.api.NwcKey
+import com.bitcointxoko.gudariwallet.i18n.AppStrings
+
+/**
+ * Maps the API model [NwcKey] to the UI domain model [ConnectionData].
+ * Keeps raw API types out of the Composable layer.
+ */
+internal fun NwcKey.toConnectionData() = ConnectionData(
+    pubkey      = pubkey,
+    wallet      = wallet,
+    description = description,
+    expiresAt   = expires_at,
+    permissions = parsePermissions(permissions),
+    createdAt   = created_at,
+    lastUsed    = last_used
+)
+
+/**
+ * Splits the raw space-separated permissions string and matches each word
+ * against ALL_PERMISSIONS by serverKey, preserving ALL_PERMISSIONS order.
+ *
+ * "pay invoice lookup history balance info"
+ *   → words = {"pay", "invoice", "lookup", "history", "balance", "info"}
+ *   → filter ALL_PERMISSIONS where serverKey ∈ words
+ *   → map to ConnectionPermission with localised label + icon
+ */
+private fun parsePermissions(raw: String): List<ConnectionPermission> {
+    val words = raw.trim().split("\\s+".toRegex()).toSet()
+    return ALL_PERMISSIONS
+        .filter { it.serverKey in words }
+        .map { perm ->
+            ConnectionPermission(
+                serverKey = perm.serverKey,
+                icon      = permissionIcon(perm.serverKey)
+            )
+        }
+}
+
+private fun permissionIcon(serverKey: String): ImageVector =
+    when (serverKey) {
+        "pay"     -> Icons.Default.ArrowUpward
+        "invoice" -> Icons.Default.ArrowDownward
+        "lookup"  -> Icons.Default.Search
+        "history" -> Icons.Default.List
+        "balance" -> Icons.Default.AccountBalanceWallet
+        "info"    -> Icons.Default.Info
+        else      -> Icons.Default.Key
+    }
+
+/**
+ * Maps the API model [NwcBudget] to the UI domain model [BudgetData].
+ * refresh_window is widened from Int to Long to match [BudgetData].
+ */
+internal fun NwcBudget.toBudgetData() = BudgetData(
+    id              = id.toLong(),
+    pubkey          = pubkey,
+    budgetMsats     = budget_msats,
+    refreshWindow   = refresh_window.toLong(),
+    createdAt       = created_at,
+    usedBudgetMsats = used_budget_msats
+)

app/src/main/java/com/bitcointxoko/gudariwallet/ui/nwc/NwcModels.kt

@@ -0,0 +1,47 @@
+package com.bitcointxoko.gudariwallet.ui.nwc
+
+import com.bitcointxoko.gudariwallet.api.NwcNewBudget
+
+// ── Available permissions ────────────────────────────────────────────
+internal data class NwcPermission(
+    val serverKey    : String,   // what we send in the permissions array
+    val default      : Boolean   // pre-checked by default
+)
+
+internal val ALL_PERMISSIONS = listOf(
+    NwcPermission("pay",             default = true),
+    NwcPermission("invoice",         default = false),
+    NwcPermission("lookup",          default = false),
+    NwcPermission("history",         default = false),
+    NwcPermission("balance",         default = false),
+    NwcPermission("info",            default = false)
+)
+
+// ── Budget ────────────────────────────────────────────────────────────
+
+/**
+ * Transient UI state for a single budget row in the "Add connection" sheet.
+ * Converted to [NwcNewBudget] on submit.
+ */
+enum class BudgetRefreshWindow(val seconds: Int) {
+    DAILY   (86_400),
+    WEEKLY  (604_800),
+    MONTHLY (2_592_000),
+    YEARLY  (31_536_000),
+    NEVER   (0);
+}
+
+data class BudgetDraft(
+    val id            : Int    = 0,          // stable key for LazyColumn / forEach
+    val amountSats    : String = "",         // raw text field value (sats)
+    val refreshWindow : BudgetRefreshWindow = BudgetRefreshWindow.MONTHLY
+) {
+    /** Returns null when the amount field is blank or non-numeric. */
+    fun toNwcNewBudget(): NwcNewBudget? {
+        val sats = amountSats.trim().toLongOrNull()?.takeIf { it > 0 } ?: return null
+        return NwcNewBudget(
+            budget_msats   = sats * 1_000L,
+            refresh_window = refreshWindow.seconds
+        )
+    }
+}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/nwc/NwcPairingDialog.kt

@@ -0,0 +1,71 @@
+package com.bitcointxoko.gudariwallet.ui.nwc
+
+import android.content.ActivityNotFoundException
+import android.content.Intent
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.unit.dp
+import androidx.core.net.toUri
+import com.bitcointxoko.gudariwallet.strings
+import com.bitcointxoko.gudariwallet.ui.common.rememberBrightnessController
+import com.bitcointxoko.gudariwallet.ui.common.QrDisplayCard
+
+@Composable
+internal fun NwcPairingUrlDialog(
+    url       : String,
+    onDismiss : () -> Unit,
+    onNoAppFound  : () -> Unit
+) {
+    // Brightness state lives here so the dialog owns the screen-brightness side-effect
+    val brightness = rememberBrightnessController()
+    val context = LocalContext.current
+
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text(strings.nwc.connectionCreated) },
+        text  = {
+            Column(verticalArrangement = Arrangement.spacedBy(12.dp)) {
+                Text(
+                    text  = strings.nwc.scanOrCopyHint,
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant
+                )
+                val strings = strings
+                QrDisplayCard(
+                    modifier           = Modifier.fillMaxWidth(),
+                    content            = url,
+                    contentDescription = strings.nwc.nwcPairingQrCode,
+                    clipLabel          = strings.nwc.nwcConnectionString,
+                    shareTitle         = strings.nwc.shareNwcConnectionString,
+                    textToCopy         = url,
+                    brightnessOn       = brightness.isOn,
+                    onToggleBrightness = brightness.toggle,
+                    isNfcEmulating     = null,
+                    qrModifier         = Modifier.fillMaxWidth(),
+                    onOpenUri          = {
+                        val intent = Intent(Intent.ACTION_VIEW, url.toUri())
+                        try {
+                            context.startActivity(
+                                Intent.createChooser(intent, strings.nwc.openInApp)
+                            )
+                        } catch (e: ActivityNotFoundException) {
+                            onNoAppFound()   // #17: no Toast — caller handles it
+                        }
+                    }
+                )
+            }
+        },
+        confirmButton = {},          // actions live inside QrDisplayCard
+        dismissButton = {
+            TextButton(onClick = onDismiss) { Text(strings.nwc.done) }
+        }
+    )
+}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/nwc/NwcScreen.kt

@@ -0,0 +1,175 @@
+package com.bitcointxoko.gudariwallet.ui.nwc
+
+import android.os.Build
+import androidx.annotation.RequiresApi
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.Add
+import androidx.compose.material3.*
+import androidx.compose.material3.pulltorefresh.PullToRefreshBox
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.bitcointxoko.gudariwallet.LocalAppStrings
+import kotlinx.coroutines.launch
+
+@RequiresApi(Build.VERSION_CODES.UPSIDE_DOWN_CAKE)
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun NwcScreen(
+    viewModel         : NwcViewModel,
+    onBack            : () -> Unit,
+    onConnectionClick : (pubkey: String) -> Unit
+) {
+    val uiState             by viewModel.uiState.collectAsStateWithLifecycle()
+    val isDeleting          by viewModel.isDeleting.collectAsStateWithLifecycle()
+    val isCreating          by viewModel.isCreating.collectAsStateWithLifecycle()
+    val pairingUrl          by viewModel.pairingUrl.collectAsStateWithLifecycle()
+    val showAddSheet        by viewModel.showAddSheet.collectAsStateWithLifecycle()
+    val pendingDeletePubkey by viewModel.pendingDeletePubkey.collectAsStateWithLifecycle()
+    val snackbarHostState = remember { SnackbarHostState() }
+    val scope             = rememberCoroutineScope()
+    val strings           = LocalAppStrings.current
+
+    val refresh = { viewModel.loadConnections(includeExpired = true, strings) }
+
+    LaunchedEffect(Unit) {
+        viewModel.loadConnections(includeExpired = true, strings)
+    }
+
+    LaunchedEffect(pairingUrl) {
+        if (pairingUrl != null) {
+            viewModel.closeAddSheet()
+        }
+    }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text(strings.nwc.walletConnect) },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = strings.nwc.back)
+                    }
+                }
+            )
+        },
+        floatingActionButton = {
+            FloatingActionButton(onClick = { viewModel.openAddSheet() }) {
+                Icon(Icons.Default.Add, contentDescription = strings.nwc.addConnection)
+            }
+        },
+        snackbarHost = { SnackbarHost(snackbarHostState) }
+    ) { innerPadding ->
+
+        val isRefreshing = uiState is NwcUiState.Loading ||
+                (uiState as? NwcUiState.Success)?.isRefreshingLastUsed == true
+
+        PullToRefreshBox(
+            isRefreshing = isRefreshing,
+            onRefresh    = refresh,
+            modifier     = Modifier
+                .fillMaxSize()
+                .padding(innerPadding)
+        ) {
+            when (val state = uiState) {
+                is NwcUiState.Loading -> {
+                    Box(Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
+                        CircularProgressIndicator()
+                    }
+                }
+
+                is NwcUiState.Error -> {
+                    NwcErrorContent(
+                        message  = state.message,
+                        onRetry  = refresh,
+                        modifier = Modifier.fillMaxSize()
+                    )
+                }
+
+                is NwcUiState.Success -> {
+                    if (state.connections.isEmpty()) {
+                        NwcEmptyContent(
+                            onAddNew = { viewModel.openAddSheet() },
+                            modifier = Modifier.fillMaxSize()
+                        )
+                    } else {
+                        LazyColumn(
+                            contentPadding = PaddingValues(vertical = 8.dp),
+                            modifier       = Modifier.fillMaxSize()
+                        ) {
+                            items(
+                                items = state.connections,
+                                key   = { it.data.pubkey }
+                            ) { connection ->
+                                NwcConnectionRow(
+                                    connection,
+                                    isDeleting,
+                                    onDeleteConfirm   = { viewModel.requestDelete(connection.data.pubkey) },
+                                    { onConnectionClick(connection.data.pubkey) }
+                                )
+                                HorizontalDivider(
+                                    modifier  = Modifier.padding(horizontal = 16.dp),
+                                    thickness = 0.5.dp
+                                )
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    // ── Add connection sheet ───────────────────────────────────────────────────
+    if (showAddSheet) {
+        NwcAddConnectionSheet(
+            isCreating = isCreating,
+            onCreate   = { description, permissions, expiresAt, budgets ->
+                viewModel.createConnection(
+                    description = description,
+                    permissions = permissions,
+                    expiresAt   = expiresAt,
+                    budgets     = budgets,
+                    strings     = strings
+                )
+            },
+            onDismiss = { viewModel.closeAddSheet() }
+        )
+    }
+
+    // ── Pairing URL dialog ─────────────────────────────────────────────────────
+    pairingUrl?.let { url ->
+        val strings = strings
+        NwcPairingUrlDialog(
+            url       = url,
+            onDismiss = { viewModel.clearPairingUrl() },
+            onNoAppFound = {
+                scope.launch {
+                    snackbarHostState.showSnackbar(strings.nwc.noCompatibleAppFound)
+                }
+            }
+        )
+    }
+
+    // ── Delete confirmation dialog ─────────────────────────────────────────────
+    pendingDeletePubkey?.let {
+        AlertDialog(
+            onDismissRequest = { viewModel.cancelDelete() },
+            title   = { Text(strings.nwc.removeConnection) },
+            text    = { Text(strings.nwc.removeConnectionDetail) },
+            confirmButton = {
+                TextButton(
+                    onClick = { viewModel.confirmDelete(strings) }
+                ) { Text(strings.nwc.remove, color = MaterialTheme.colorScheme.error) }
+            },
+            dismissButton = {
+                TextButton(onClick = { viewModel.cancelDelete() }) { Text(strings.nwc.cancel) }
+            }
+        )
+    }
+}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/nwc/NwcStates.kt

@@ -0,0 +1,68 @@
+package com.bitcointxoko.gudariwallet.ui.nwc
+
+import androidx.compose.foundation.layout.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Add
+import androidx.compose.material3.*
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import com.bitcointxoko.gudariwallet.strings
+
+// ── Empty state ──────────────────────────────────────────────────────
+
+@Composable
+internal fun NwcEmptyContent(
+    onAddNew : () -> Unit,
+    modifier : Modifier = Modifier
+) {
+    Column(
+        modifier            = modifier.padding(32.dp),
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center
+    ) {
+        Text(strings.nwc.noConnectionsYet, style = MaterialTheme.typography.titleMedium)
+        Spacer(Modifier.height(8.dp))
+        Text(
+            strings.nwc.tapToAddHint,
+            style = MaterialTheme.typography.bodyMedium,
+            color = MaterialTheme.colorScheme.onSurfaceVariant
+        )
+        Spacer(Modifier.height(24.dp))
+        Button(onClick = onAddNew) {
+            Icon(Icons.Default.Add, contentDescription = null)
+            Spacer(Modifier.width(8.dp))
+            Text(strings.nwc.addConnection)
+        }
+    }
+}
+
+// ── Error state ──────────────────────────────────────────────────────
+
+@Composable
+internal fun NwcErrorContent(
+    message  : String,
+    onRetry  : () -> Unit,
+    modifier : Modifier = Modifier
+) {
+    Column(
+        modifier            = modifier.padding(32.dp),
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center
+    ) {
+        Text(
+            strings.nwc.somethingWentWrong,
+            style = MaterialTheme.typography.titleMedium,
+            color = MaterialTheme.colorScheme.error
+        )
+        Spacer(Modifier.height(8.dp))
+        Text(
+            message,
+            style = MaterialTheme.typography.bodySmall,
+            color = MaterialTheme.colorScheme.onSurfaceVariant
+        )
+        Spacer(Modifier.height(24.dp))
+        OutlinedButton(onClick = onRetry) { Text(strings.nwc.retry) }
+    }
+}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/nwc/NwcViewModel.kt

@@ -0,0 +1,354 @@
+package com.bitcointxoko.gudariwallet.ui.nwc
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.lifecycle.viewModelScope
+import androidx.lifecycle.viewmodel.compose.viewModel
+import com.bitcointxoko.gudariwallet.LocalAppStrings
+import com.bitcointxoko.gudariwallet.api.NwcGetResponse
+import com.bitcointxoko.gudariwallet.api.NwcNewBudget
+import com.bitcointxoko.gudariwallet.api.NwcRegistrationRequest
+import com.bitcointxoko.gudariwallet.data.NwcCacheRepository
+import com.bitcointxoko.gudariwallet.data.WalletRepository
+import com.bitcointxoko.gudariwallet.data.toDomain
+import com.bitcointxoko.gudariwallet.data.toGetResponse
+import com.bitcointxoko.gudariwallet.i18n.AppStrings
+import com.bitcointxoko.gudariwallet.util.NwcKeyGenerator
+import com.bitcointxoko.gudariwallet.util.NwcKeypair
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.drop
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
+import kotlinx.coroutines.launch
+import timber.log.Timber
+
+private const val TAG = "NwcViewModel"
+
+// ── UI State ──────────────────────────────────────────────────────────────────
+
+sealed interface NwcUiState {
+    data object Loading : NwcUiState
+    data class  Success(
+        val connections: List<NwcGetResponse>,
+        val isRefreshingLastUsed: Boolean = false   // true only while network sync is in-flight
+    ) : NwcUiState
+    data class  Error(val message: String) : NwcUiState
+}
+
+sealed interface ConnectionDetailState {
+    data object Loading : ConnectionDetailState
+    data class  Success(
+        val connection : ConnectionData,
+        val budgets    : List<BudgetData>
+    ) : ConnectionDetailState
+    data class  Error(val message: String) : ConnectionDetailState
+}
+
+// ── ViewModel ─────────────────────────────────────────────────────────────────
+
+class NwcViewModel(
+    private val repo: WalletRepository,
+    private val cache: NwcCacheRepository
+) : ViewModel() {
+
+    private val _uiState = MutableStateFlow<NwcUiState>(NwcUiState.Loading)
+    val uiState: StateFlow<NwcUiState> = _uiState.asStateFlow()
+
+    /** Whether a delete operation is currently in flight (disables buttons). */
+    private val _isDeleting = MutableStateFlow(false)
+    val isDeleting: StateFlow<Boolean> = _isDeleting.asStateFlow()
+
+    // Holds the keypair only while the "add connection" flow is active.
+    // Cleared as soon as the user dismisses the QR screen.
+    private val _pendingKeypair = MutableStateFlow<NwcKeypair?>(null)
+    val pendingKeypair: StateFlow<NwcKeypair?> = _pendingKeypair.asStateFlow()
+
+    /** True while a createConnection call is in flight. */
+    private val _isCreating = MutableStateFlow(false)
+    val isCreating: StateFlow<Boolean> = _isCreating.asStateFlow()
+
+    /** Holds the pairing URL after a successful registration, until dismissed. */
+    private val _pairingUrl = MutableStateFlow<String?>(null)
+    val pairingUrl: StateFlow<String?> = _pairingUrl.asStateFlow()
+
+    private val _connectionDetailState =
+        MutableStateFlow<ConnectionDetailState>(ConnectionDetailState.Loading)
+    val connectionDetailState: StateFlow<ConnectionDetailState> =
+        _connectionDetailState.asStateFlow()
+    private var detailObserverJob: Job? = null
+    private var cacheObserverJob: Job? = null
+
+    // ── Sheet / dialog UI state (survives config change) ────────────────────────
+    private var isSyncing = false
+
+    private val _showAddSheet        = MutableStateFlow(false)
+    val showAddSheet: StateFlow<Boolean> = _showAddSheet.asStateFlow()
+
+    private val _pendingDeletePubkey = MutableStateFlow<String?>(null)
+    val pendingDeletePubkey: StateFlow<String?> = _pendingDeletePubkey.asStateFlow()
+
+    fun openAddSheet()  { _showAddSheet.value = true  }
+    fun closeAddSheet() { _showAddSheet.value = false }
+
+    fun requestDelete(pubkey: String) { _pendingDeletePubkey.value = pubkey  }
+    fun cancelDelete()                { _pendingDeletePubkey.value = null    }
+    // confirmDelete() calls the existing deleteConnection() then clears the pending key
+    fun confirmDelete(strings: AppStrings) {
+        _pendingDeletePubkey.value?.let { deleteConnection(it, strings) }
+        _pendingDeletePubkey.value = null
+    }
+
+    // ── Load ──────────────────────────────────────────────────────────────────
+
+    fun loadConnections(includeExpired: Boolean = false, strings: AppStrings) {
+        Timber.d("[$TAG] loadConnections(includeExpired=$includeExpired)")
+        isSyncing = true
+
+        // 1. Subscribe to cache — emits immediately if rows exist, stays alive
+        //    for the ViewModel lifetime. Every cache write re-emits automatically.
+        if (cacheObserverJob == null) {
+            // Fast path: one-shot read populates UI before the Flow cold-starts
+            viewModelScope.launch {
+                val snapshot = cache.getKeysOnce()
+                if (snapshot.isNotEmpty() && _uiState.value !is NwcUiState.Success) {
+                    Timber.d("[$TAG] cache snapshot: ${snapshot.size} connection(s)")
+                    _uiState.value = NwcUiState.Success(
+                        connections          = snapshot,
+                        isRefreshingLastUsed = true
+                    )
+                }
+            }
+            cacheObserverJob = cache.observeKeys()
+                .drop(1)   // skip first emission — snapshot already handled it
+                .onEach { cached ->
+                    if (cached.isNotEmpty()) {
+                        Timber.d("[$TAG] cache hit: ${cached.size} connection(s)")
+                        _uiState.value = NwcUiState.Success(
+                            connections          = cached.map { it.toDomain().toGetResponse() },
+                            isRefreshingLastUsed = isSyncing   // ← reflects current sync state, not always true
+                        )
+                    } else if (_uiState.value !is NwcUiState.Success) {
+                        _uiState.value = NwcUiState.Loading
+                    }
+                }
+                .launchIn(viewModelScope)
+        }
+
+        // 2. Fetch from network; result is written to cache which re-emits above
+        viewModelScope.launch {
+            runCatching { repo.getNwcKeys(includeExpired) }
+                .onSuccess { keys ->
+                    Timber.i("[$TAG] network: ${keys.size} NWC connection(s)")
+                    isSyncing = false
+                    cache.syncKeys(keys)           // Room write → Flow re-emits
+                }
+                .onFailure { e ->
+                    Timber.e(e, "[$TAG] failed to load NWC connections")
+                    // Only show error if we have nothing cached to show
+                    isSyncing = false
+                    if (_uiState.value !is NwcUiState.Success) {
+                        _uiState.value = NwcUiState.Error(
+                            e.message ?: strings.nwc.failedToLoadConnections
+                        )
+                    } else {
+                        Timber.w("[$TAG] network failed but cache is showing — non-fatal")
+                    }
+                }
+        }
+    }
+
+    /**
+     * Generates a keypair, registers it with the server, then fetches
+     * the nostr+walletconnect:// pairing URL.
+     * Private key is held only in local scope — never stored.
+     */
+    fun createConnection(
+        description : String,
+        permissions : List<String>,
+        expiresAt   : Long = 0L,
+        budgets     : List<NwcNewBudget> = emptyList(),
+        strings     : AppStrings
+    ) {
+        Timber.d("[$TAG] createConnection description='$description' permissions=$permissions")
+        viewModelScope.launch {
+            _isCreating.value = true
+            try {
+                runCatching {
+                    val keypair = NwcKeyGenerator.generate()
+                    Timber.d("[$TAG] generated keypair pubkey=${keypair.pubKeyHex.take(16)}…")
+                    check(keypair.pubKeyHex.length == 64) {
+                        "pubKeyHex must be 64 hex chars, got ${keypair.pubKeyHex.length}"
+                    }
+                    check(keypair.privKeyHex.length == 64) {
+                        "privKeyHex must be 64 hex chars, got ${keypair.privKeyHex.length}"
+                    }
+                    Timber.d("[$TAG] generated keypair pubkey=${keypair.pubKeyHex.take(16)}… (${keypair.pubKeyHex.length} chars)")
+                    Timber.d("[$TAG] REGISTERING pubkey=${keypair.pubKeyHex}")
+
+                    val registered = repo.registerNwcKey(
+                        pubkey  = keypair.pubKeyHex,
+                        request = NwcRegistrationRequest(
+                            description = description,
+                            permissions = permissions,
+                            expires_at  = expiresAt,
+                            budgets     = budgets
+                        )
+                    )
+                    Timber.i("[$TAG] registered key ✓")
+                    cache.saveKey(registered)
+                    Timber.d("[$TAG] new key cached ✓")
+                    val url = repo.getNwcPairingUrl(keypair.privKeyHex)
+                    Timber.i("[$TAG] pairing URL fetched ✓")
+                    Timber.d("[$TAG] URI=$url")
+                    url
+                }
+                    .onSuccess { url ->
+                        _pairingUrl.value = url
+                        silentRefresh()
+                    }
+                    .onFailure { e ->
+                        Timber.e(e, "[$TAG] createConnection failed")
+                        _uiState.value = NwcUiState.Error(e.message ?: strings.nwc.failedToCreateConnection)
+                    }
+            } finally {
+                _isCreating.value = false
+            }
+        }
+    }
+
+    /** Wipes the pairing URL from memory once the user has copied it. */
+    fun clearPairingUrl() {
+        Timber.d("[$TAG] clearing pairing URL from memory")
+        _pairingUrl.value = null
+    }
+
+    // ── Delete / Revoke ──────────────────────────────────────────────────────────
+
+    /**
+     * Deletes an NWC key by pubkey. Used by both the list screen (swipe-to-delete)
+     * and the detail screen (revoke button). Sets [_isDeleting] for the duration
+     * so the list screen can disable row interactions while in flight.
+     */
+    fun deleteConnection(pubkey: String, strings: AppStrings) {
+        Timber.d("[$TAG] deleteConnection pubkey=${pubkey.take(16)}…")
+        viewModelScope.launch {
+            _isDeleting.value = true
+            try {
+                runCatching { repo.deleteNwcKey(pubkey) }
+                    .onSuccess {
+                        Timber.i("[$TAG] deleted connection pubkey=${pubkey.take(16)}… ✓")
+                        cache.deleteKey(pubkey)
+                        val current = _uiState.value
+                        if (current is NwcUiState.Success) {
+                            _uiState.value = NwcUiState.Success(
+                                current.connections.filter { it.data.pubkey != pubkey }
+                            )
+                        }
+                        silentRefresh()
+                    }
+                    .onFailure { e ->
+                        Timber.e(e, "[$TAG] failed to delete connection pubkey=${pubkey.take(16)}…")
+                        _uiState.value = NwcUiState.Error(
+                            e.message ?: strings.nwc.failedToDeleteConnection
+                        )
+                    }
+            } finally {
+                _isDeleting.value = false
+            }
+        }
+    }
+
+
+    fun loadConnectionDetail(pubkey: String, strings: AppStrings) {
+        Timber.d("[$TAG] loadConnectionDetail pubkey=${pubkey.take(16)}…")
+
+        // Cancel any subscription from a previous key — prevents stale Flow
+        // from a previously viewed key overwriting the current detail state
+        detailObserverJob?.cancel()
+        _connectionDetailState.value = ConnectionDetailState.Loading
+
+        detailObserverJob = combine(
+            cache.observeKey(pubkey),
+            cache.observeBudgets(pubkey)
+        ) { keyEntity, budgetEntities ->
+            Pair(keyEntity, budgetEntities)
+        }
+            .onEach { (keyEntity, budgetEntities) ->
+                if (keyEntity != null) {
+                    Timber.d("[$TAG] detail cache hit for ${pubkey.take(16)}…")
+                    _connectionDetailState.value = ConnectionDetailState.Success(
+                        connection = keyEntity.toDomain().toConnectionData(),
+                        budgets    = budgetEntities.map { it.toDomain().toBudgetData() }
+                    )
+                } else if (_connectionDetailState.value !is ConnectionDetailState.Success) {
+                    _connectionDetailState.value = ConnectionDetailState.Loading
+                }
+            }
+            .launchIn(viewModelScope)   // ← now tracked and cancellable
+
+        viewModelScope.launch {
+            runCatching {
+                repo.getNwcKey(pubkey = pubkey, includeExpired = true, refreshLastUsed = false)
+            }
+                .onSuccess { response ->
+                    Timber.i("[$TAG] loaded connection detail ✓")
+                    cache.refreshLastUsed(pubkey, response.data.last_used)
+                }
+                .onFailure { e ->
+                    Timber.e(e, "[$TAG] failed to load connection detail")
+                    if (_connectionDetailState.value !is ConnectionDetailState.Success) {
+                        _connectionDetailState.value = ConnectionDetailState.Error(
+                            e.message ?: strings.nwc.failedToLoadConnection
+                        )
+                    } else {
+                        Timber.w("[$TAG] detail network refresh failed — cache showing (non-fatal)")
+                    }
+                }
+        }
+    }
+
+    /** Reset to Loading so the next open always shows a fresh load. */
+    fun clearConnectionDetail() {
+        Timber.d("[$TAG] clearConnectionDetail")
+        detailObserverJob?.cancel()      // ← stop the old key's Flow immediately
+        detailObserverJob = null
+        _connectionDetailState.value = ConnectionDetailState.Loading
+    }
+
+    // ── Silent refresh (no Loading flash) ───────────────────────────────────────
+
+    /**
+     * Syncs the connection list from the server without transitioning to
+     * [NwcUiState.Loading] first. Used after mutations (create, delete) where
+     * the UI already shows the correct optimistic state.
+     * Failures are non-fatal — the optimistic state is already correct.
+     */
+    private fun silentRefresh(includeExpired: Boolean = false) {
+        viewModelScope.launch {
+            runCatching { repo.getNwcKeys(includeExpired) }
+                .onSuccess { keys ->
+                    Timber.d("[$TAG] silentRefresh: ${keys.size} connection(s)")
+                    cache.syncKeys(keys)   // Room write → cache Flow re-emits to UI
+                }
+                .onFailure { e ->
+                    Timber.w(e, "[$TAG] silentRefresh failed (non-fatal)")
+                }
+        }
+    }
+
+
+    // ── Factory ───────────────────────────────────────────────────────────────
+
+    class Factory(
+        private val repo: WalletRepository,
+        private val cache: NwcCacheRepository
+    ) : ViewModelProvider.Factory {
+        @Suppress("UNCHECKED_CAST")
+        override fun <T : ViewModel> create(modelClass: Class<T>): T =
+            NwcViewModel(repo, cache) as T
+    }
+}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/onboarding/BiometricLockPage.kt

@@ -0,0 +1,85 @@
+package com.bitcointxoko.gudariwallet.ui.onboarding
+
+import androidx.compose.foundation.layout.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Fingerprint
+import androidx.compose.material3.*
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import com.bitcointxoko.gudariwallet.LocalAppStrings
+
+@Composable
+fun BiometricLockPage(
+    appLockEnabled: Boolean,
+    onAppLockChanged: (Boolean) -> Unit
+) {
+    val strings = LocalAppStrings.current.lock
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(horizontal = 32.dp),
+        verticalArrangement = Arrangement.Center,
+        horizontalAlignment = Alignment.CenterHorizontally
+    ) {
+        Icon(
+            imageVector = Icons.Filled.Fingerprint,
+            contentDescription = null,
+            modifier = Modifier.size(72.dp),
+            tint = MaterialTheme.colorScheme.primary
+        )
+
+        Spacer(Modifier.height(24.dp))
+
+        Text(
+            text = strings.appLockTitle,
+            style = MaterialTheme.typography.headlineMedium,
+            textAlign = TextAlign.Center
+        )
+
+        Spacer(Modifier.height(12.dp))
+
+        Text(
+            text = strings.appLockDescription,
+            style = MaterialTheme.typography.bodyMedium,
+            textAlign = TextAlign.Center,
+            color = MaterialTheme.colorScheme.onSurfaceVariant
+        )
+
+        Spacer(Modifier.height(32.dp))
+
+        Card(
+            modifier = Modifier.fillMaxWidth(),
+            colors = CardDefaults.cardColors(
+                containerColor = MaterialTheme.colorScheme.surfaceVariant
+            )
+        ) {
+            Row(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(horizontal = 16.dp, vertical = 12.dp),
+                verticalAlignment = Alignment.CenterVertically,
+                horizontalArrangement = Arrangement.SpaceBetween
+            ) {
+                Column(modifier = Modifier.weight(1f)) {
+                    Text(
+                        text = strings.appLockToggleLabel,
+                        style = MaterialTheme.typography.bodyLarge
+                    )
+                    Text(
+                        text = if (appLockEnabled) strings.appLockToggleEnabled
+                        else strings.appLockToggleDisabled,
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant
+                    )
+                }
+                Switch(
+                    checked = appLockEnabled,
+                    onCheckedChange = onAppLockChanged
+                )
+            }
+        }
+    }
+}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/onboarding/OnboardingPages.kt

@@ -265,7 +265,7 @@ fun NotificationsPage(
             imageVector        = Icons.Default.Notifications,
             contentDescription = null,
             modifier           = Modifier.size(72.dp),
-            // Mirror the BatteryPage tint behaviour
+            // Mirror the BatteryPage tint behavior
             tint               = if (alreadyGranted)
                 MaterialTheme.colorScheme.primary
             else
@@ -300,7 +300,7 @@ fun NotificationsPage(
     }
 }
 
-// ── Page 5: Battery optimisation ──────────────────────────────────────────────
+// ── Page 5: Battery optimization ──────────────────────────────────────────────
 @Composable
 fun BatteryPage(strings: AppStrings) {
     val context = LocalContext.current

app/src/main/java/com/bitcointxoko/gudariwallet/ui/onboarding/OnboardingScreen.kt

@@ -13,12 +13,12 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewmodel.compose.viewModel
-import androidx.work.WorkInfo
 import com.bitcointxoko.gudariwallet.LocalAppStrings
+import com.bitcointxoko.gudariwallet.data.AppLockStore
 import com.bitcointxoko.gudariwallet.data.HistoricalSyncStore
 import com.bitcointxoko.gudariwallet.security.SecretStore
-import com.bitcointxoko.gudariwallet.sync.HistoricalSyncWorker
 import kotlinx.coroutines.launch
+import timber.log.Timber
 
 private const val PAGE_WELCOME       = 0
 private const val PAGE_SERVER_URL    = 1
@@ -26,13 +26,15 @@ private const val PAGE_INVOICE       = 2
 private const val PAGE_ADMIN         = 3
 private const val PAGE_NOTIFICATIONS = 4
 private const val PAGE_BATTERY       = 5
-private const val PAGE_SYNC          = 6   // ← new
-private const val PAGE_COUNT         = 7   // ← was 6
+private const val PAGE_BIOMETRIC     = 6
+private const val PAGE_SYNC          = 7
+private const val PAGE_COUNT         = 8
 
 @Composable
 fun OnboardingScreen(
     secretStore                    : SecretStore,
-    syncStore                      : HistoricalSyncStore,   // ← new
+    syncStore                      : HistoricalSyncStore,
+    appLockStore                   : AppLockStore,
     onRequestNotificationPermission: () -> Unit,
     onComplete                     : () -> Unit
 ) {
@@ -45,12 +47,11 @@ fun OnboardingScreen(
     var adminKey     by remember { mutableStateOf("") }
     var adminVisible by remember { mutableStateOf(false) }
     var error        by remember { mutableStateOf<String?>(null) }
-    var credentialsSaved by remember { mutableStateOf(false) }
+    var appLockEnabled by remember { mutableStateOf(true) }
 
     // ── Sync state ────────────────────────────────────────────────────────────
     val vm: OnboardingViewModel = viewModel(
         factory = OnboardingViewModelFactory(
-            // LocalContext.current.applicationContext cast to Application
             app         = androidx.compose.ui.platform.LocalContext.current
                 .applicationContext as android.app.Application,
             secretStore = secretStore,
@@ -64,31 +65,33 @@ fun OnboardingScreen(
 
     LaunchedEffect(pagerState.currentPage) { error = null }
 
-    var previousPage by remember { mutableIntStateOf(0) }
-    LaunchedEffect(pagerState.currentPage) {
-        val current = pagerState.currentPage
-        if (current > previousPage) {
-            // User moved forward — save whatever the previous page owned
-            when (previousPage) {
-                PAGE_SERVER_URL -> secretStore.saveBaseUrl(baseUrl)
-                PAGE_INVOICE    -> secretStore.saveInvoiceKey(invoiceKey)
-                PAGE_ADMIN      -> secretStore.saveAdminKey(adminKey)
-                else            -> Unit
-            }
-        }
-        previousPage = current
-    }
+    val hexKeyRegex = Regex("^[0-9a-f]{32}$")
 
     fun validateCurrentPage(): Boolean {
         error = when (pagerState.currentPage) {
-            PAGE_SERVER_URL -> if (baseUrl.isBlank())    strings.onboarding.fieldsRequired else null
-            PAGE_INVOICE    -> if (invoiceKey.isBlank()) strings.onboarding.fieldsRequired else null
-            PAGE_ADMIN      -> if (adminKey.isBlank())   strings.onboarding.fieldsRequired else null
-            else            -> null
+            PAGE_SERVER_URL -> when {
+                baseUrl.isBlank() -> strings.onboarding.fieldsRequired
+                else              -> null
+            }
+
+            PAGE_INVOICE -> when {
+                invoiceKey.isBlank()                    -> strings.onboarding.fieldsRequired
+                !hexKeyRegex.matches(invoiceKey)      -> strings.onboarding.invalidKeyFormat
+                else                                    -> null
+            }
+
+            PAGE_ADMIN -> when {
+                adminKey.isBlank()                      -> strings.onboarding.fieldsRequired
+                !hexKeyRegex.matches(adminKey)        -> strings.onboarding.invalidKeyFormat
+                else                                    -> null
+            }
+
+            else -> null
         }
         return error == null
     }
 
+
     Scaffold { innerPadding ->
         Column(
             modifier = Modifier
@@ -119,6 +122,10 @@ fun OnboardingScreen(
                         onRequestNotificationPermission = onRequestNotificationPermission
                     )
                     PAGE_BATTERY       -> BatteryPage(strings)
+                    PAGE_BIOMETRIC -> BiometricLockPage(
+                        appLockEnabled = appLockEnabled,
+                        onAppLockChanged = { appLockEnabled = it }
+                    )
                     PAGE_SYNC          -> SyncHistoryPage(
                         workInfo      = syncWorkInfo,
                         isAlreadyDone = syncAlreadyDone,
@@ -127,7 +134,7 @@ fun OnboardingScreen(
                         onSchedule    = { delayMs -> vm.enqueueHistoricalSync(delayMillis = delayMs) },
                         onContinue    = {
                             scope.launch {
-                                secretStore.setOnboarded()  // moved here from PAGE_BATTERY
+                                secretStore.setOnboarded()
                                 onComplete()
                             }
                         },
@@ -167,17 +174,28 @@ fun OnboardingScreen(
                         Spacer(Modifier.width(1.dp))
                     }
 
-                    val isLastPage = pagerState.currentPage == PAGE_BATTERY
+                    // val isLastPage = pagerState.currentPage == PAGE_BATTERY
 
                     Button(onClick = {
                         if (!validateCurrentPage()) return@Button
                         scope.launch {
-                            // Save each field as soon as the user advances past it
                             when (pagerState.currentPage) {
-                                PAGE_SERVER_URL -> secretStore.saveBaseUrl(baseUrl)
-                                PAGE_INVOICE    -> secretStore.saveInvoiceKey(invoiceKey)
-                                PAGE_ADMIN      -> secretStore.saveAdminKey(adminKey)
-                                else            -> Unit
+                                PAGE_SERVER_URL -> {
+                                    Timber.d("ONBOARDING saving baseUrl (len=${baseUrl.length}): $baseUrl")
+                                    secretStore.saveBaseUrl(baseUrl)
+                                }
+                                PAGE_INVOICE -> {
+                                    Timber.d("ONBOARDING saving invoiceKey (len=${invoiceKey.length}): $invoiceKey")
+                                    secretStore.saveInvoiceKey(invoiceKey)
+                                }
+                                PAGE_ADMIN -> {
+                                    Timber.d("ONBOARDING saving adminKey (len=${adminKey.length}): $adminKey")
+                                    secretStore.saveAdminKey(adminKey)
+                                }
+                                PAGE_BIOMETRIC -> {
+                                    scope.launch { appLockStore.setAppLockEnabled(appLockEnabled) }
+                                }
+                                else -> Unit
                             }
                             pagerState.animateScrollToPage(pagerState.currentPage + 1)
                         }

app/src/main/java/com/bitcointxoko/gudariwallet/ui/receive/AmountDisplay.kt

@@ -25,7 +25,7 @@ internal fun AmountDisplay(
     val strings = LocalAppStrings.current
 
     Text(
-        text       = strings.amountDisplaySats(amountSats),                    // ← "1 sat" or "X sats"
+        text       = strings.receive.amountDisplaySats(amountSats),                    // ← "1 sat" or "X sats"
         style      = style,
         fontWeight = FontWeight.Bold
     )

app/src/main/java/com/bitcointxoko/gudariwallet/ui/receive/BrightnessToggleButton.kt

@@ -1,29 +0,0 @@
-package com.bitcointxoko.gudariwallet.ui.receive
-
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.BrightnessHigh
-import androidx.compose.material.icons.filled.BrightnessLow
-import androidx.compose.material3.Icon
-import androidx.compose.material3.IconButton
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.runtime.Composable
-import com.bitcointxoko.gudariwallet.LocalAppStrings
-
-@Composable
-internal fun BrightnessToggleButton(
-    isOn    : Boolean,
-    onToggle: () -> Unit
-) {
-    val strings = LocalAppStrings.current
-
-    IconButton(onClick = onToggle) {
-        Icon(
-            imageVector        = if (isOn) Icons.Filled.BrightnessHigh
-            else      Icons.Filled.BrightnessLow,
-            contentDescription = if (isOn) strings.brightnessReduce           // ← "Reduce brightness"
-            else      strings.brightnessBoost,            // ← "Boost brightness"
-            tint               = if (isOn) MaterialTheme.colorScheme.primary
-            else      MaterialTheme.colorScheme.onSurfaceVariant
-        )
-    }
-}

app/src/main/java/com/bitcointxoko/gudariwallet/ui/receive/ReceiveScreen.kt

@@ -1,7 +1,5 @@
 package com.bitcointxoko.gudariwallet.ui.receive
 
-import android.app.Activity
-import android.view.WindowManager
 import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
@@ -58,15 +56,15 @@ import androidx.compose.ui.unit.dp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import com.bitcointxoko.gudariwallet.LocalAppStrings
 import com.bitcointxoko.gudariwallet.ui.ReceiveState
-import com.bitcointxoko.gudariwallet.ui.SendState
 import com.bitcointxoko.gudariwallet.ui.WalletViewModel
-import com.bitcointxoko.gudariwallet.ui.components.UnitWheelPicker
+import com.bitcointxoko.gudariwallet.ui.common.QrDisplayCard
+import com.bitcointxoko.gudariwallet.ui.common.rememberBrightnessController
+import com.bitcointxoko.gudariwallet.ui.common.UnitWheelPicker
 import com.bitcointxoko.gudariwallet.ui.nfc.NfcViewModel
 import com.bitcointxoko.gudariwallet.util.buildUpTaps
-import com.bitcointxoko.gudariwallet.util.doubleTap
 import com.bitcointxoko.gudariwallet.util.fiatLabel
-import com.bitcointxoko.gudariwallet.util.heavyClick
 import kotlinx.coroutines.delay
+import kotlin.time.Duration.Companion.milliseconds
 
 @Composable
 fun ReceiveScreen(
@@ -74,32 +72,17 @@ fun ReceiveScreen(
     nfcVm                    : NfcViewModel,
     onNavigateToPaymentDetail: (checkingId: String) -> Unit
 ) {
-    val strings      = LocalAppStrings.current
+    val strings          = LocalAppStrings.current
+    val context          = LocalContext.current
+    val brightness       = rememberBrightnessController()
+    var showAddress      by remember { mutableStateOf(false) }
     val receiveState     by vm.receiveState.collectAsStateWithLifecycle()
     val lightningAddress by vm.lightningAddress.collectAsStateWithLifecycle()
     val fiatRate         by vm.fiatSatsPerUnit.collectAsStateWithLifecycle()
     val fiatCurrency     by vm.selectedCurrency.collectAsStateWithLifecycle()
 
-    val context            = LocalContext.current
-    val window             = (context as Activity).window
-    val originalBrightness = remember { window.attributes.screenBrightness }
-    var brightnessOn       by remember { mutableStateOf(false) }
-    var showAddress        by remember { mutableStateOf(false) }
-
-    val onToggleBrightness = {
-        val lp = window.attributes
-        lp.screenBrightness = if (!brightnessOn)
-            WindowManager.LayoutParams.BRIGHTNESS_OVERRIDE_FULL
-        else originalBrightness
-        window.attributes = lp
-        brightnessOn = !brightnessOn
-    }
-
     DisposableEffect(Unit) {
         onDispose {
-            val lp = window.attributes
-            lp.screenBrightness = originalBrightness
-            window.attributes = lp
             nfcVm.stopEmulating()
             vm.resetReceiveState()
         }
@@ -141,14 +124,14 @@ fun ReceiveScreen(
                             lightningAddress   = lightningAddress,
                             showAddress        = showAddress,
                             onToggleAddress    = { showAddress = !showAddress },
-                            brightnessOn       = brightnessOn,
-                            onToggleBrightness = onToggleBrightness,
+                            brightnessOn       = brightness.isOn,
+                            onToggleBrightness = brightness.toggle,
                             isLoading          = receiveState is ReceiveState.AwaitingInvoice,
                             onCreateInvoice    = { amountSats, memo ->
                                 vm.createInvoice(
                                     amountSats,
                                     memo,
-                                    failedToCreateInvoice = strings.receiveVmFailedToCreateInvoice
+                                    failedToCreateInvoice = strings.receive.receiveVmFailedToCreateInvoice
                                 )
                             }
                         )
@@ -163,9 +146,9 @@ fun ReceiveScreen(
                                     callback   = state.callback,
                                     amountSats = amountSats,
                                     memo       = state.defaultDescription,
-                                    failedToCreateInvoice = strings.receiveVmFailedToCreateInvoice,
-                                    withdrawRejected      = strings.receiveVmWithdrawRejected,
-                                    withdrawFailed        = strings.receiveVmWithdrawFailed,
+                                    failedToCreateInvoice = strings.receive.receiveVmFailedToCreateInvoice,
+                                    withdrawRejected      = strings.receive.receiveVmWithdrawRejected,
+                                    withdrawFailed        = strings.receive.receiveVmWithdrawFailed,
                                 )
                             },
                             onDismiss = { vm.resetReceiveState() }
@@ -190,7 +173,7 @@ fun ReceiveScreen(
                                 modifier            = Modifier.padding(24.dp)
                             ) {
                                 Text(
-                                    text  = strings.receiveError,          // ← "Error"
+                                    text  = strings.receive.receiveError,          // ← "Error"
                                     style = MaterialTheme.typography.titleMedium,
                                     color = MaterialTheme.colorScheme.error
                                 )
@@ -216,8 +199,8 @@ fun ReceiveScreen(
                 state              = receiveState as ReceiveState.InvoiceReady,
                 fiatRate           = fiatRate,
                 fiatCurrency       = fiatCurrency,
-                brightnessOn       = brightnessOn,
-                onToggleBrightness = onToggleBrightness,
+                brightnessOn       = brightness.isOn,
+                onToggleBrightness = brightness.toggle,
                 nfcVm              = nfcVm,
                 onReset            = { vm.resetReceiveState() }
             )
@@ -243,8 +226,8 @@ private fun LnurlWithdrawSheet(
         val parsed = amountText.trim().toLongOrNull()
         return when {
             parsed == null || parsed <= 0 -> { amountError = strings.enterValidAmount;          null }  // ← "Enter a valid amount"
-            parsed < state.minSats        -> { amountError = strings.minimumSats(state.minSats); null }  // ← "Minimum is X sats"
-            parsed > state.maxSats        -> { amountError = strings.maximumSats(state.maxSats); null }  // ← "Maximum is X sats"
+            parsed < state.minSats        -> { amountError = strings.receive.minimumSats(state.minSats); null }  // ← "Minimum is X sats"
+            parsed > state.maxSats        -> { amountError = strings.receive.maximumSats(state.maxSats); null }  // ← "Maximum is X sats"
             else                          -> { amountError = null; parsed }
         }
     }
@@ -265,7 +248,7 @@ private fun LnurlWithdrawSheet(
             Spacer(Modifier.size(12.dp))
             Column {
                 Text(
-                    text  = strings.withdrawFrom,                          // ← "Withdraw from"
+                    text  = strings.receive.withdrawFrom,                          // ← "Withdraw from"
                     style = MaterialTheme.typography.labelMedium,
                     color = MaterialTheme.colorScheme.onSurfaceVariant
                 )
@@ -304,7 +287,7 @@ private fun LnurlWithdrawSheet(
                         color = MaterialTheme.colorScheme.onSecondaryContainer
                     )
                     Text(
-                        text       = strings.withdrawButtonAmount(state.maxSats), // ← "X sats"
+                        text       = strings.receive.withdrawButtonAmount(state.maxSats), // ← "X sats"
                         style      = MaterialTheme.typography.titleMedium,
                         fontWeight = FontWeight.Bold,
                         color      = MaterialTheme.colorScheme.onSecondaryContainer
@@ -315,12 +298,12 @@ private fun LnurlWithdrawSheet(
             OutlinedTextField(
                 value           = amountText,
                 onValueChange   = { amountText = it; amountError = null },
-                label           = { Text(strings.amountInSats) },          // ← "Amount (sats)"
+                label           = { Text(strings.receive.amountInSats) },          // ← "Amount (sats)"
                 supportingText  = {
                     if (amountError != null)
                         Text(amountError!!, color = MaterialTheme.colorScheme.error)
                     else
-                        Text(strings.satsRange(state.minSats, state.maxSats)) // ← "X – Y sats"
+                        Text(strings.receive.satsRange(state.minSats, state.maxSats)) // ← "X – Y sats"
                 },
                 isError         = amountError != null,
                 keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
@@ -339,8 +322,8 @@ private fun LnurlWithdrawSheet(
             modifier = Modifier.fillMaxWidth()
         ) {
             Text(
-                if (fixedAmount) strings.withdrawButtonAmount(state.maxSats)  // ← "Withdraw X sats"
-                else             strings.withdrawButton                        // ← "Withdraw"
+                if (fixedAmount) strings.receive.withdrawButtonAmount(state.maxSats)  // ← "Withdraw X sats"
+                else             strings.receive.withdrawButton                        // ← "Withdraw"
             )
         }
 
@@ -397,7 +380,7 @@ private fun ReceiveIdleContent(
             horizontalArrangement = Arrangement.SpaceBetween
         ) {
             Text(
-                text  = strings.receive,                                   // ← "Receive"
+                text  = strings.receive.receive,                                   // ← "Receive"
                 style = MaterialTheme.typography.headlineSmall
             )
             if (lightningAddress != null) {
@@ -438,12 +421,12 @@ private fun ReceiveIdleContent(
                     Spacer(Modifier.height(12.dp))
 
                     QrDisplayCard(
-                        content            = lightningAddress,
-                        contentDescription = strings.lightningAddressQrCode,  // ← "Lightning address QR code"
-                        clipLabel          = strings.lightningAddressLabel,    // ← "Lightning Address"
-                        shareTitle         = strings.shareLightningAddress,    // ← "Share Lightning Address"
-                        textToCopy         = lightningAddress,
-                        brightnessOn       = brightnessOn,
+                        content = lightningAddress,
+                        contentDescription = strings.receive.lightningAddressQrCode,  // ← "Lightning address QR code"
+                        clipLabel = strings.receive.lightningAddressLabel,    // ← "Lightning Address"
+                        shareTitle = strings.receive.shareLightningAddress,    // ← "Share Lightning Address"
+                        textToCopy = lightningAddress,
+                        brightnessOn = brightnessOn,
                         onToggleBrightness = onToggleBrightness
                     )
                 }
@@ -512,7 +495,7 @@ private fun AmountStepContent(
         val number = amountText.trim().toDoubleOrNull() ?: return@remember null
         when (activeUnit) {
             AmountUnit.SATS -> fiatLabel(number.toLong(), fiatRate, fiatCurrency)
-            AmountUnit.FIAT -> "≈ ${(number * fiatRate!!).toLong()} sats"
+            AmountUnit.FIAT -> "≈ ${(number * fiatRate).toLong()} sats"
         }
     }
 
@@ -560,7 +543,7 @@ private fun AmountStepContent(
             )
 
             UnitWheelPicker(
-                units           = if (showFiatToggle) listOf(strings.sats, fiatCurrency!!) else listOf(strings.sats),
+                units           = if (showFiatToggle) listOf(strings.sats, fiatCurrency) else listOf(strings.sats),
                 selectedIndex   = if (activeUnit == AmountUnit.SATS) 0 else 1,
                 onIndexSelected = { newIndex ->
                     val newUnit = if (newIndex == 0) AmountUnit.SATS else AmountUnit.FIAT
@@ -605,8 +588,8 @@ private fun MemoStepContent(
         OutlinedTextField(
             value         = memo,
             onValueChange = { memo = it },
-            label         = { Text(strings.memoOptional) },               // ← "Memo (optional)"
-            placeholder   = { Text(strings.memoPlaceholder) },            // ← "What's this for?"
+            label         = { Text(strings.receive.memoOptional) },               // ← "Memo (optional)"
+            placeholder   = { Text(strings.receive.memoPlaceholder) },            // ← "What's this for?"
             singleLine    = true,
             modifier      = Modifier.fillMaxWidth()
         )
@@ -621,8 +604,8 @@ private fun MemoStepContent(
             modifier = Modifier.fillMaxWidth()
         ) {
             Text(
-                if (isLoading) strings.creatingInvoice                    // ← "Creating invoice…"
-                else           strings.createInvoice                      // ← "Create Invoice"
+                if (isLoading) strings.receive.creatingInvoice                    // ← "Creating invoice…"
+                else           strings.receive.createInvoice                      // ← "Create Invoice"
             )
         }
 
@@ -654,7 +637,7 @@ private fun ReceiveInvoiceContent(
     }
     LaunchedEffect(state.expiresAt) {
         while (secondsLeft > 0L) {
-            delay(1_000L)
+            delay(1_000L.milliseconds)
             secondsLeft = (state.expiresAt - System.currentTimeMillis() / 1000L)
                 .coerceAtLeast(0L)
         }
@@ -682,23 +665,23 @@ private fun ReceiveInvoiceContent(
         }
 
         QrDisplayCard(
-            content            = state.bolt11.uppercase(),
-            contentDescription = strings.lightningInvoiceQrCode,          // ← "Lightning invoice QR code"
-            clipLabel          = strings.invoiceLabel,                     // ← "Invoice"
-            shareTitle         = strings.shareInvoice,                     // ← "Share Invoice"
-            textToCopy         = state.bolt11,
-            brightnessOn       = brightnessOn,
+            content = state.bolt11.uppercase(),
+            contentDescription = strings.receive.lightningInvoiceQrCode,          // ← "Lightning invoice QR code"
+            clipLabel = strings.receive.invoiceLabel,                     // ← "Invoice"
+            shareTitle = strings.receive.shareInvoice,                     // ← "Share Invoice"
+            textToCopy = state.bolt11,
+            brightnessOn = brightnessOn,
             onToggleBrightness = onToggleBrightness,
-            isNfcEmulating     = isEmulating,
-            onToggleNfc        = {
+            isNfcEmulating = isEmulating,
+            onToggleNfc = {
                 if (isEmulating) nfcVm.stopEmulating()
-                else             nfcVm.startEmulating("lightning:${state.bolt11}")
+                else nfcVm.startEmulating("lightning:${state.bolt11}")
             },
-            nfcEnabled         = !isExpired,
-            modifier           = Modifier
+            nfcEnabled = !isExpired,
+            modifier = Modifier
                 .weight(1f)
                 .fillMaxWidth(),
-            qrModifier         = Modifier
+            qrModifier = Modifier
                 .fillMaxWidth()
                 .weight(1f)
         )
@@ -711,7 +694,7 @@ private fun ReceiveInvoiceContent(
             if (!isExpired) {
                 CircularProgressIndicator(modifier = Modifier.size(16.dp), strokeWidth = 2.dp)
                 Text(
-                    text  = strings.waiting,                               // ← "Waiting…"
+                    text  = strings.receive.waiting,                               // ← "Waiting…"
                     style = MaterialTheme.typography.bodySmall,
                     color = MaterialTheme.colorScheme.onSurfaceVariant
                 )
@@ -722,7 +705,7 @@ private fun ReceiveInvoiceContent(
                 )
             } else {
                 Text(
-                    text  = strings.invoiceExpired,                        // ← "Invoice expired"
+                    text  = strings.receive.invoiceExpired,                        // ← "Invoice expired"
                     style = MaterialTheme.typography.bodySmall,
                     color = MaterialTheme.colorScheme.error
                 )
@@ -734,7 +717,7 @@ private fun ReceiveInvoiceContent(
             modifier = Modifier.fillMaxWidth()
         ) {
             Text(
-                if (isExpired) strings.newInvoice                          // ← "New Invoice"
+                if (isExpired) strings.receive.newInvoice                          // ← "New Invoice"
                 else           strings.cancel                              // ← "Cancel"
             )
         }
@@ -768,7 +751,7 @@ private fun ReceiveSuccessContent(
         )
         Spacer(Modifier.height(16.dp))
         Text(
-            text  = strings.paymentReceived,                               // ← "Payment Received!"
+            text  = strings.receive.paymentReceived,                               // ← "Payment Received!"
             style = MaterialTheme.typography.headlineSmall
         )
         Spacer(Modifier.height(8.dp))

app/src/main/java/com/bitcointxoko/gudariwallet/ui/receive/ReceiveViewModel.kt

@@ -44,7 +44,7 @@ class ReceiveViewModel(
     // ── Invoice creation ──────────────────────────────────────────────────────
     /**
      * @param failedToCreateInvoice  Localised error string from the call site,
-     *                               e.g. `strings.receiveVmFailedToCreateInvoice`
+     *                               e.g. `strings.receive.receiveVmFailedToCreateInvoice`
      */
     fun createInvoice(
         amountSats             : Long,
@@ -104,9 +104,9 @@ class ReceiveViewModel(
     }
 
     /**
-     * @param failedToCreateInvoice  `strings.receiveVmFailedToCreateInvoice`
-     * @param withdrawRejected       `strings.receiveVmWithdrawRejected`
-     * @param withdrawFailed         `strings.receiveVmWithdrawFailed`
+     * @param failedToCreateInvoice  `strings.receive.receiveVmFailedToCreateInvoice`
+     * @param withdrawRejected       `strings.receive.receiveVmWithdrawRejected`
+     * @param withdrawFailed         `strings.receive.receiveVmWithdrawFailed`
      */
     fun executeWithdraw(
         k1                    : String,

app/src/main/java/com/bitcointxoko/gudariwallet/ui/send/ConfirmCard.kt

@@ -28,8 +28,8 @@ import com.bitcointxoko.gudariwallet.LocalAppStrings
 import com.bitcointxoko.gudariwallet.ui.DecodedInvoice
 import com.bitcointxoko.gudariwallet.ui.SendState
 import com.bitcointxoko.gudariwallet.ui.WalletViewModel
-import com.bitcointxoko.gudariwallet.ui.components.CopyIconButton
-import com.bitcointxoko.gudariwallet.ui.components.DetailRow
+import com.bitcointxoko.gudariwallet.ui.common.CopyIconButton
+import com.bitcointxoko.gudariwallet.ui.common.DetailRow
 import com.bitcointxoko.gudariwallet.util.BiometricHelper
 import com.bitcointxoko.gudariwallet.util.fiatLabel
 import com.bitcointxoko.gudariwallet.util.payingToLabel
@@ -37,6 +37,7 @@ import kotlinx.coroutines.delay
 import java.time.Instant
 import java.time.ZoneId
 import java.time.format.DateTimeFormatter
+import kotlin.time.Duration.Companion.milliseconds
 
 @Composable
 internal fun Bolt11ConfirmCard(
@@ -117,7 +118,7 @@ private fun ConfirmCardContent(
     var now by remember { mutableStateOf(Instant.now()) }
     LaunchedEffect(expiresAt) {
         while (true) {
-            delay(1_000L)
+            delay(1_000L.milliseconds)
             now = Instant.now()
         }
     }