Merge pull request #119 from Forte11Cuba/fix/mint-issued-event-race-condition

fix: deliver mint Issued event before metadata await (closes #115)

lib/providers/wallet_provider.dart

@@ -1354,24 +1354,31 @@ class WalletProvider extends ChangeNotifier {
       amount: amount,
       description: description,
     ).listen(
-      (quote) async {
+      (quote) {
         // Guardar invoice temprano en SharedPreferences
         if (quote.state == MintQuoteState.unpaid) {
           invoiceBolt11 = quote.request;
           _savePendingMintInvoice(quote.id, quote.request, mintUrl, unit, amount);
         }
 
-        // Cuando se completa, guardar metadata, confetti, limpiar pending
+        // Reenviar a la UI ANTES de cualquier await: Rust cierra el stream
+        // inmediatamente tras emitir Issued, y onDone corre durante el await
+        // de _saveMintMetadata, cerrando el controller antes de que el evento
+        // llegue al screen.
+        if (!controller.isClosed) {
+          controller.add(quote);
+        }
+
+        // Metadata async fire-and-forget (no bloquea el forward)
         if (quote.state == MintQuoteState.issued && invoiceBolt11 != null) {
-          final saved = await _saveMintMetadata(wallet, invoiceBolt11!, quote.transactionId);
+          final invoice = invoiceBolt11!;
+          unawaited(
+            _saveMintMetadata(wallet, invoice, quote.transactionId).then((saved) {
               // Only remove pending invoice if metadata was saved;
               // otherwise _matchPendingMintInvoices can recover it on next startup
               if (saved) _removePendingMintInvoice(quote.id);
-        }
-
-        // Reenviar a la UI (si sigue escuchando)
-        if (!controller.isClosed) {
-          controller.add(quote);
+            }),
+          );
         }
       },
       onError: (error) {

lib/screens/12_request/request_screen.dart

@@ -841,8 +841,7 @@ class _RequestScreenState extends State<RequestScreen> {
       _status = RequestStatus.received;
       _receivedAmount = amount;
     });
-    final walletProvider = context.read<WalletProvider>();
-    walletProvider.confettiController.fire();
+    // Confetti se dispara globalmente desde WalletProvider._saveMintMetadata
     // TODO: re-enable once CDK fixes NIP-17 (cashubtc/cdk#1807)
     // Only remove pending Nostr request if this screen created one.
     // Disabled while Nostr payment requests are disabled to avoid