fix: r8 broke workmanager

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

@@ -19,5 +19,6 @@ object JsonProvider {
         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/Models.kt

@@ -340,42 +340,43 @@ data class FiatRateResponse(
 // ── History sync ──────────────────────────────────────────────────────────────
 @Serializable
 data class PaginatedPaymentsResponse(
-    @SerialName("data")  val data: List<PaymentRecord>,
-    @SerialName("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,
-    val permissions: String,
-    val created_at: Long,
-    val last_used: Long
+    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,
-    val pubkey: String,
-    val budget_msats: Long,
-    val refresh_window: Int,       // seconds
-    val created_at: Long,
-    val used_budget_msats: Long = 0
+    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,
-    val budgets: List<NwcBudget>
+    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,        // seconds
+    val refresh_window: Int,
     val created_at: Long = System.currentTimeMillis() / 1000L
 )
 
@@ -383,7 +384,7 @@ data class NwcNewBudget(
 data class NwcRegistrationRequest(
     val permissions: List<String>,
     val description: String,
-    val expires_at: Long,           // unix timestamp; 0 = no expiry
+    val expires_at: Long,
     val budgets: List<NwcNewBudget> = emptyList()
 )