fix: send payment shows as failed even when succeeded

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

@@ -35,9 +35,9 @@ data class CreateInvoiceRequest(
 
 @Serializable
 data class CreateInvoiceResponse(
-    @SerialName("payment_hash")    val paymentHash: String,
-    @SerialName("payment_request") val paymentRequest: String,
-    @SerialName("expiry")          val expiry: String?
+    @SerialName("payment_hash")    val paymentHash: String  = "",
+    @SerialName("payment_request") val paymentRequest: String = "",
+    @SerialName("expiry")          val expiry: String?      = null
 )
 
 // ── Pay invoice ───────────────────────────────────────────────────────────────
@@ -49,22 +49,22 @@ data class PayInvoiceRequest(
 
 @Serializable
 data class PayInvoiceResponse(
-    @SerialName("payment_hash") val paymentHash: String,
-    @SerialName("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 ────────────────────────────────────────────────────────────
@@ -84,7 +84,7 @@ data class DecodeInvoiceResponse(
 
 @Serializable
 data class RouteHintHop(
-    @SerialName("public_key")        val publicKey: String,
+    @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,
@@ -94,7 +94,7 @@ data class RouteHintHop(
 // ── LNURL scan ────────────────────────────────────────────────────────────────
 @Serializable
 data class LnurlScanResponse(
-    val tag: String?,
+    val tag: String? = null,
     // ── payRequest fields ─────────────────────────────────────────────────────
     val callback: String?                       = null,
     @SerialName("minSendable")    val minSendable: Long?           = null,
@@ -121,7 +121,7 @@ data class LnurlScanResponse(
 // ── LNURL-pay callback response (LUD-06) ─────────────────────────────────────
 @Serializable
 data class LnurlCallbackResponse(
-    val pr: String,
+    val pr: String = "",
     val routes: List<JsonElement>? = null,
     @SerialName("successAction") val successAction: SuccessAction? = null,
     val status: String? = null,
@@ -131,12 +131,12 @@ data class LnurlCallbackResponse(
 // ── LNURL pay ─────────────────────────────────────────────────────────────────
 @Serializable
 data class LnurlPayRes(
-    val tag: String?,
-    val callback: String?,
-    @SerialName("minSendable")    val minSendable: Long?,
-    @SerialName("maxSendable")    val maxSendable: Long?,
-    val metadata: String?,
-    @SerialName("commentAllowed") val commentAllowed: Int?,
+    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
 )
@@ -151,25 +151,25 @@ data class PayLnurlRequest(
 
 @Serializable
 data class PayLnurlResponse(
-    @SerialName("payment_hash") val paymentHash: String,
-    @SerialName("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 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?,
-    @Serializable(with = LongAsDoubleSerializer::class) val min: Long,
-    @Serializable(with = LongAsDoubleSerializer::class) 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 ───────────────────────────────────────────────────────────
@@ -303,6 +303,7 @@ object SuccessActionSerializer : KSerializer<SuccessAction?> {
     }
 }
 
+@Serializable
 data class PaymentDetailResponse(
     val paid: Boolean,
     val details: PaymentRecord?
@@ -311,30 +312,30 @@ data class PaymentDetailResponse(
 // ── WebSocket payment message ─────────────────────────────────────────────────
 @Serializable
 data class WsPaymentMessage(
-    @SerialName("wallet_balance") val walletBalance: Long?,
-    val payment: WsPayment?
+    @SerialName("wallet_balance") val walletBalance: Long?   = null,
+    val payment: WsPayment?                                  = null
 )
 
 @Serializable
 data class WsPayment(
-    @SerialName("payment_hash") val paymentHash: String,
-    @SerialName("checking_id")  val checkingId: String,
-    @SerialName("amount")       val amount: Long,
-    @SerialName("fee")          val fee: Long,
-    @SerialName("memo")         val memo: String?,
-    @SerialName("time")         val time: String,
-    @SerialName("status")       val status: String,
-    @SerialName("bolt11")       val bolt11: String?,
-    @SerialName("pending")      val pending: Boolean,
-    @SerialName("preimage")     val preimage: String?,
-    @SerialName("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 ─────────────────────────────────────────────────────────────────
 @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 ──────────────────────────────────────────────────────────────