fix: await ln payment before gift card confetti

app/src/main/java/to/bitkit/repositories/BlocktankRepo.kt

@@ -20,13 +20,17 @@ import kotlinx.collections.immutable.persistentListOf
 import kotlinx.collections.immutable.toImmutableList
 import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.CoroutineStart
 import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.async
+import kotlinx.coroutines.coroutineScope
 import kotlinx.coroutines.currentCoroutineContext
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.flow.filterIsInstance
 import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.flow.flowOn
@@ -37,7 +41,10 @@ import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.isActive
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
+import kotlinx.coroutines.withTimeoutOrNull
+import org.lightningdevkit.ldknode.Bolt11Invoice
 import org.lightningdevkit.ldknode.ChannelDetails
+import org.lightningdevkit.ldknode.Event
 import to.bitkit.async.ServiceQueue
 import to.bitkit.data.CacheStore
 import to.bitkit.di.BgDispatcher
@@ -47,6 +54,7 @@ import to.bitkit.ext.calculateRemoteBalance
 import to.bitkit.ext.nowTimestamp
 import to.bitkit.models.BlocktankBackupV1
 import to.bitkit.models.EUR
+import to.bitkit.models.msatCeilOf
 import to.bitkit.services.CoreService
 import to.bitkit.services.LightningService
 import to.bitkit.utils.Logger
@@ -459,26 +467,52 @@ class BlocktankRepo @Inject constructor(
         }
     }
 
-    private suspend fun claimGiftCodeWithLiquidity(code: String, amount: ULong): GiftClaimResult {
+    private suspend fun claimGiftCodeWithLiquidity(code: String, amount: ULong): GiftClaimResult = coroutineScope {
         val invoice = lightningRepo.createInvoice(
             amountSats = null,
             description = "blocktank-gift-code:$code",
             expirySeconds = Defaults.bolt11InvoiceExpirySeconds,
         ).getOrThrow()
 
+        val expectedPaymentHash = Bolt11Invoice.fromStr(invoice).paymentHash()
+
         Logger.debug("Created invoice for gift code, requesting payment from LSP", context = TAG)
 
+        val paymentReceivedDeferred = async(start = CoroutineStart.UNDISPATCHED) {
+            lightningRepo.nodeEvents
+                .filterIsInstance<Event.PaymentReceived>()
+                .first { it.paymentHash == expectedPaymentHash }
+        }
+
         val giftResponse = ServiceQueue.CORE.background {
             giftPay(invoice = invoice)
         }
 
-        Logger.debug("Gift payment request completed: id=${giftResponse.id}", context = TAG)
+        Logger.debug(
+            "Gift payment request completed: id='${giftResponse.id}', awaiting LDK PaymentReceived",
+            context = TAG,
+        )
+
+        val paymentReceived = withTimeoutOrNull(GIFT_PAYMENT_RECEIVE_TIMEOUT) {
+            paymentReceivedDeferred.await()
+        }
+
+        if (paymentReceived == null) {
+            paymentReceivedDeferred.cancel()
+            throw ServiceError.GiftClaimPaymentNotReceived()
+        }
+
+        Logger.debug(
+            "Gift payment confirmed by LDK: hash='${paymentReceived.paymentHash}', " +
+                "amountMsat='${paymentReceived.amountMsat}'",
+            context = TAG,
+        )
+
+        val receivedSats = msatCeilOf(paymentReceived.amountMsat).toLong()
 
-        return GiftClaimResult.SuccessWithLiquidity(
-            paymentHashOrTxId = giftResponse.bolt11PaymentId ?: giftResponse.id,
-            sats = giftResponse.bolt11Payment?.paidSat?.toLong()
-                ?: giftResponse.appliedGiftCode?.giftSat?.toLong()
-                ?: amount.toLong(),
+        GiftClaimResult.SuccessWithLiquidity(
+            paymentHashOrTxId = paymentReceived.paymentHash,
+            sats = receivedSats.takeIf { it > 0 } ?: amount.toLong(),
             invoice = invoice,
             code = code,
         )
@@ -518,6 +552,7 @@ class BlocktankRepo @Inject constructor(
         private const val DEFAULT_SOURCE = "bitkit-android"
         private const val PEER_CONNECTION_DELAY_MS = 2_000L
         private val TIMEOUT_GIFT_CODE = 30.seconds
+        private val GIFT_PAYMENT_RECEIVE_TIMEOUT = 45.seconds
     }
 }
 

app/src/main/java/to/bitkit/ui/MainActivity.kt

@@ -63,6 +63,10 @@ import to.bitkit.viewmodels.WalletViewModel
 
 @AndroidEntryPoint
 class MainActivity : FragmentActivity() {
+    private companion object {
+        const val KEY_CONSUMED_DEEPLINK_URI = "consumed_deeplink_uri"
+    }
+
     private val appViewModel by viewModels<AppViewModel>()
     private val walletViewModel by viewModels<WalletViewModel>()
     private val blocktankViewModel by viewModels<BlocktankViewModel>()
@@ -83,7 +87,12 @@ class MainActivity : FragmentActivity() {
             desc = getString(R.string.notification__channel_node__body),
             importance = NotificationManager.IMPORTANCE_LOW
         )
-        appViewModel.handleDeeplinkIntent(intent)
+
+        val consumedUri = savedInstanceState?.getString(KEY_CONSUMED_DEEPLINK_URI)
+        val currentUri = intent?.data?.toString()
+        if (currentUri == null || currentUri != consumedUri) {
+            appViewModel.handleDeeplinkIntent(intent)
+        }
 
         installSplashScreen()
         enableAppEdgeToEdge()
@@ -201,6 +210,11 @@ class MainActivity : FragmentActivity() {
         appViewModel.handleDeeplinkIntent(intent)
     }
 
+    override fun onSaveInstanceState(outState: Bundle) {
+        super.onSaveInstanceState(outState)
+        intent?.data?.toString()?.let { outState.putString(KEY_CONSUMED_DEEPLINK_URI, it) }
+    }
+
     override fun onDestroy() {
         super.onDestroy()
         if (!settingsViewModel.notificationsGranted.value) {

app/src/main/java/to/bitkit/utils/Errors.kt

@@ -21,6 +21,7 @@ sealed class ServiceError(message: String) : AppError(message) {
     class CurrencyRateUnavailable : ServiceError("Currency rate unavailable")
     class BlocktankInfoUnavailable : ServiceError("Blocktank info not available")
     class GeoBlocked : ServiceError("Geo blocked user")
+    class GiftClaimPaymentNotReceived : ServiceError("Gift claim payment not received")
 }
 
 class HttpError(message: String, val code: Int = 500, cause: Throwable? = null) : AppError(message, cause)

changelog.d/next/929.fixed.md

@@ -0,0 +1 @@
+Fix gift card flow showing false-positive confetti when the LSP payment fails, and re-opening unexpectedly after an app language change.