refactor: r8 build optmisations

app/build.gradle.kts

@@ -33,6 +33,10 @@ android {
         targetSdk = 36
         versionCode = 1
         versionName = "0.1.0"
+        androidResources {
+            localeFilters += setOf("en", "es", "eu")
+        }
+
 
         // testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         testInstrumentationRunner = "androidx.benchmark.junit4.AndroidBenchmarkRunner"
@@ -52,8 +56,8 @@ android {
 
     buildTypes {
         release {
-            // isMinifyEnabled = true          // Enables R8/ProGuard shrinking
+            isMinifyEnabled = true          // Enables R8/ProGuard shrinking
-            // isShrinkResources = true        // Removes unused resources
+            isShrinkResources = true        // Removes unused resources
             proguardFiles(
                 getDefaultProguardFile("proguard-android-optimize.txt"),
                 "proguard-rules.pro"
@@ -62,6 +66,8 @@ android {
         }
         create("benchmark") {
             initWith(buildTypes.getByName("release"))
+            isMinifyEnabled = false       // benchmarks must not be minified
+            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
@@ -116,7 +122,7 @@ dependencies {
     testImplementation(libs.junit)
     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)
@@ -128,7 +134,7 @@ dependencies {
     implementation(libs.retrofit2.retrofit)
     implementation(libs.converter.gson)
     implementation(libs.okhttp)
-    implementation(libs.logging.interceptor)
+    debugImplementation(libs.logging.interceptor)
 
     // Coroutines
     implementation(libs.kotlinx.coroutines.android)

app/proguard-rules.pro

@@ -1,24 +1,124 @@
-# Add project specific ProGuard rules here.
+# ──────────────────────────────────────────────────────────────────
-# You can control the set of applied configuration files using the
+# Protobuf lite
-# proguardFiles setting in build.gradle.
+# ──────────────────────────────────────────────────────────────────
-#
-# For more details, see
-#   http://developer.android.com/guide/developing/tools/proguard.html
-
-# 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 *;
-#}
-
-# Uncomment this to preserve the line number information for
-# debugging stack traces.
-#-keepattributes SourceFile,LineNumberTable
-
-# If you keep the line number information, uncomment this to
-# hide the original source file name.
-#-renamesourcefileattribute SourceFile
-
-# Keep all protobuf generated message classes and their fields
 -keep class * extends com.google.protobuf.GeneratedMessageLite { *; }
+
+# ──────────────────────────────────────────────────────────────────
+# Google Tink 1.13.0
+# ──────────────────────────────────────────────────────────────────
+-keep class com.google.crypto.tink.proto.** { *; }
+-keep class com.google.crypto.tink.shaded.protobuf.** { *; }
+-keep class com.google.crypto.tink.** { *; }
+-dontwarn com.google.crypto.tink.**
+
+# ──────────────────────────────────────────────────────────────────
+# Gson — generic signature safety
+# ──────────────────────────────────────────────────────────────────
+-keepattributes Signature
+-keepattributes *Annotation*
+-keep,allowobfuscation,allowshrinking,allowoptimization class com.google.gson.reflect.TypeToken
+-keep,allowobfuscation,allowshrinking,allowoptimization class * extends com.google.gson.reflect.TypeToken
+
+# ──────────────────────────────────────────────────────────────────
+# Gson — ALL classes Gson instantiates via reflection
+# ──────────────────────────────────────────────────────────────────
+
+# Response bodies
+-keep class com.bitcointxoko.gudariwallet.api.WalletResponse { *; }
+-keep class com.bitcointxoko.gudariwallet.api.PaymentStatusResponse { *; }
+-keep class com.bitcointxoko.gudariwallet.api.PaymentDetails { *; }
+-keep class com.bitcointxoko.gudariwallet.api.PaymentDetailResponse { *; }
+-keep class com.bitcointxoko.gudariwallet.api.WithdrawCallbackResponse { *; }
+-keep class com.bitcointxoko.gudariwallet.api.FiatRateResponse { *; }
+-keep class com.bitcointxoko.gudariwallet.api.LnurlpLink { *; }
+
+# NWC models
+-keep class com.bitcointxoko.gudariwallet.api.NwcGetResponse { *; }
+-keep class com.bitcointxoko.gudariwallet.api.NwcKey { *; }
+-keep class com.bitcointxoko.gudariwallet.api.NwcBudget { *; }
+-keep class com.bitcointxoko.gudariwallet.api.NwcNewBudget { *; }
+-keep class com.bitcointxoko.gudariwallet.api.NwcRegistrationRequest { *; }
+
+# Request bodies
+-keep class com.bitcointxoko.gudariwallet.api.CreateInvoiceRequest { *; }
+-keep class com.bitcointxoko.gudariwallet.api.PayInvoiceRequest { *; }
+-keep class com.bitcointxoko.gudariwallet.api.DecodeInvoiceRequest { *; }
+-keep class com.bitcointxoko.gudariwallet.api.PayLnurlRequest { *; }
+
+# SuccessAction sealed class + TypeAdapter subclasses
+-keep class com.bitcointxoko.gudariwallet.api.SuccessAction { *; }
+-keep class com.bitcointxoko.gudariwallet.api.FlexibleStringAdapter
+-keep class com.bitcointxoko.gudariwallet.api.SuccessActionAdapter
+
+# Node alias API responses
+-keep class com.bitcointxoko.gudariwallet.api.MempoolNodeResponse { *; }
+-keep class com.bitcointxoko.gudariwallet.api.OneMlNodeResponse { *; }
+
+# ──────────────────────────────────────────────────────────────────
+# Retrofit 3.0.0
+# ──────────────────────────────────────────────────────────────────
+-keep,allowobfuscation,allowshrinking interface retrofit2.Call
+-keep,allowobfuscation,allowshrinking class retrofit2.Response
+-keep,allowobfuscation,allowshrinking class kotlin.coroutines.Continuation
+
+# ──────────────────────────────────────────────────────────────────
+# OkHttp 5.x / Okio
+# ──────────────────────────────────────────────────────────────────
+-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
+# ──────────────────────────────────────────────────────────────────
+-keep class com.google.zxing.** { *; }
+-dontwarn com.google.zxing.**
+
+# ──────────────────────────────────────────────────────────────────
+# Room 2.7.1
+# ──────────────────────────────────────────────────────────────────
+-keep class * extends androidx.room.RoomDatabase
+-keep @androidx.room.Entity class *
+-dontwarn androidx.room.**
+
+# ──────────────────────────────────────────────────────────────────
+# WorkManager 2.9.1
+# ──────────────────────────────────────────────────────────────────
+-keep class * extends androidx.work.Worker
+-keep class * extends androidx.work.CoroutineWorker
+-keep class * extends androidx.work.ListenableWorker {
+    public <init>(android.content.Context, androidx.work.WorkerParameters);
+}
+
+# ──────────────────────────────────────────────────────────────────
+# Kotlin Coroutines 1.11.0
+# ──────────────────────────────────────────────────────────────────
+-keepnames class kotlinx.coroutines.internal.MainDispatcherFactory {}
+-keepnames class kotlinx.coroutines.CoroutineExceptionHandler {}
+-dontwarn kotlinx.coroutines.**
+
+# ──────────────────────────────────────────────────────────────────
+# 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/src/main/java/com/bitcointxoko/gudariwallet/api/LNbitsClient.kt

@@ -1,40 +1,22 @@
 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.flow.first
 import kotlinx.coroutines.runBlocking
 import okhttp3.HttpUrl.Companion.toHttpUrl
 import okhttp3.Interceptor
 import okhttp3.OkHttpClient
-import okhttp3.logging.HttpLoggingInterceptor
 import retrofit2.Retrofit
 import retrofit2.converter.gson.GsonConverterFactory
-import timber.log.Timber
 import java.util.concurrent.TimeUnit
 
 object LNbitsClient {
 
-    val logging = HttpLoggingInterceptor { message ->
-        Timber.tag("OkHttp").d(message)
-    }.apply {
-        level = HttpLoggingInterceptor.Level.BODY  // logs full request + response body
-    }
-
     // 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)
-        .addInterceptor(logging)
-        .apply {
-            if (BuildConfig.DEBUG) {
-                addInterceptor(HttpLoggingInterceptor().apply {
-                    level = HttpLoggingInterceptor.Level.BODY
-                })
-            }
-        }
         .build()
 
     fun create(secrets: SecretStore): LNbitsApi {
@@ -71,21 +53,11 @@ object LNbitsClient {
         }
 
         val client = httpClient.newBuilder()
-//            .addInterceptor(authInterceptor)
             .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
             .client(client)
             .addConverterFactory(GsonConverterFactory.create(GsonProvider.gson))
             .build()