feat: integrate internal Rust bridge, remove cdk_flutter dependency (Phase 2)

lib/main.dart

@@ -2,7 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_localizations/flutter_localizations.dart';
 import 'package:provider/provider.dart';
-import 'package:cdk_flutter/cdk_flutter.dart' hide WalletProvider;
+import 'src/rust/frb_generated.dart';
 import 'package:elcaju/l10n/app_localizations.dart';
 import 'core/theme/app_theme.dart';
 import 'providers/wallet_provider.dart';
@@ -15,8 +15,8 @@ import 'screens/1_splash/splash_screen.dart';
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
 
-  // Inicializar CDK Flutter (Cashu SDK)
-  await CdkFlutter.init();
+  // Inicializar bridge Rust interno (Cashu SDK)
+  await RustLib.init();
 
   // Configurar orientación y estilo de barra de estado
   SystemChrome.setPreferredOrientations([

lib/providers/p2pk_provider.dart

@@ -11,7 +11,7 @@ import 'dart:convert';
 import 'package:flutter/foundation.dart';
 import 'package:flutter_secure_storage/flutter_secure_storage.dart';
 import 'package:bip32/bip32.dart' as bip32;
-import 'package:cdk_flutter/cdk_flutter.dart' as cdk;
+import '../src/rust/api/keys.dart' as cdk;
 import 'package:uuid/uuid.dart';
 
 import '../models/p2pk_key.dart';

lib/providers/wallet_provider.dart

@@ -3,8 +3,10 @@ import 'dart:convert';
 import 'dart:io';
 import 'package:flutter/foundation.dart';
 import 'package:cbor/cbor.dart';
-import 'package:cdk_flutter/cdk_flutter.dart';
-import 'package:http/http.dart' as http;
+import '../src/rust/api/wallet.dart';
+import '../src/rust/api/token.dart';
+import '../src/rust/api/mint_info.dart';
+import '../src/rust/api/keys.dart';
 import 'package:path_provider/path_provider.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:uuid/uuid.dart';
@@ -177,15 +179,11 @@ class WalletProvider extends ChangeNotifier {
   // ============================================================
 
   /// Verifica si podemos alcanzar un mint específico.
-  /// Hace ping HTTP GET a {mintUrl}/v1/info con timeout de 3 segundos.
+  /// Usa función Rust que hace GET a {mintUrl}/v1/info.
   /// Retorna true si responde 200, false en cualquier otro caso.
   Future<bool> canReachMint(String mintUrl) async {
     try {
-      final uri = Uri.parse('$mintUrl/v1/info');
-      final response = await http.get(uri).timeout(
-        const Duration(seconds: 3),
-      );
-      return response.statusCode == 200;
+      return await pingMint(mintUrl: mintUrl);
     } catch (e) {
       debugPrint('Ping to mint failed: $e');
       return false;
@@ -409,7 +407,7 @@ class WalletProvider extends ChangeNotifier {
   /// Usa mintInfo.nuts.nut04 (MintMethodSettings) para obtener las unidades.
   Future<List<String>> _detectAndAddMint(String mintUrl) async {
     try {
-      // Obtener info del mint (función global de cdk_flutter)
+      // Obtener info del mint (función del bridge Rust)
       final mintInfo = await getMintInfo(mintUrl: mintUrl);
 
       // Extraer unidades de nut04 (mint methods)
@@ -446,31 +444,14 @@ class WalletProvider extends ChangeNotifier {
   }
 
   /// Obtiene los keysets de un mint y los agrega al caché _keysetUnits.
-  /// Llama a GET {mintUrl}/v1/keysets para obtener el mapping keyset_id → unit.
+  /// Usa función Rust que llama a GET {mintUrl}/v1/keysets.
   Future<void> _fetchKeysets(String mintUrl) async {
     try {
-      final response = await http.get(
-        Uri.parse('$mintUrl/v1/keysets'),
-        headers: {'Content-Type': 'application/json'},
-      );
-
-      if (response.statusCode == 200) {
-        final data = jsonDecode(response.body) as Map<String, dynamic>;
-        final keysets = data['keysets'] as List<dynamic>?;
-
-        if (keysets != null) {
-          for (final ks in keysets) {
-            final id = ks['id'] as String?;
-            final unit = ks['unit'] as String?;
-            if (id != null && unit != null) {
-              _keysetUnits[id] = unit;
-            }
-          }
-          debugPrint('Keysets cargados para $mintUrl: ${keysets.length}');
-        }
-      } else {
-        debugPrint('Error HTTP ${response.statusCode} al obtener keysets de $mintUrl');
+      final keysets = await fetchKeysets(mintUrl: mintUrl);
+      for (final ks in keysets) {
+        _keysetUnits[ks.id] = ks.unit;
       }
+      debugPrint('Keysets cargados para $mintUrl: ${keysets.length}');
     } catch (e) {
       debugPrint('Error obteniendo keysets de $mintUrl: $e');
       // No lanzamos excepción, el caché simplemente no tendrá estos keysets

lib/screens/2_onboarding/restore_wallet_screen.dart

@@ -64,7 +64,7 @@ class _RestoreWalletScreenState extends State<RestoreWalletScreen> {
       final p2pkProvider = context.read<P2PKProvider>();
 
       // Inicializar wallet primero (valida el mnemonic internamente).
-      // Si es inválido, cdk_flutter lanzará una excepción antes de persistir.
+      // Si es inválido, el bridge Rust lanzará una excepción antes de persistir.
       await walletProvider.initialize(mnemonic);
 
       // Solo guardar mnemonic si initialize() pasó sin error

lib/screens/5_send/share_token_screen.dart

@@ -4,7 +4,7 @@ import 'package:flutter/services.dart';
 import 'package:qr_flutter/qr_flutter.dart';
 import 'package:lucide_icons/lucide_icons.dart';
 import 'package:share_plus/share_plus.dart';
-import 'package:cdk_flutter/cdk_flutter.dart' as cdk;
+import '../../src/rust/api/token.dart' as cdk;
 import 'package:elcaju/l10n/app_localizations.dart';
 import '../../core/constants/colors.dart';
 import '../../core/constants/dimensions.dart';

lib/screens/6_mint/invoice_screen.dart

@@ -4,7 +4,7 @@ import 'package:flutter/services.dart';
 import 'package:provider/provider.dart';
 import 'package:qr_flutter/qr_flutter.dart';
 import 'package:lucide_icons/lucide_icons.dart';
-import 'package:cdk_flutter/cdk_flutter.dart' hide WalletProvider;
+import '../../src/rust/api/wallet.dart';
 import 'package:elcaju/l10n/app_localizations.dart';
 import '../../core/constants/colors.dart';
 import '../../core/constants/dimensions.dart';

lib/screens/7_melt/melt_screen.dart

@@ -2,7 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:provider/provider.dart';
 import 'package:lucide_icons/lucide_icons.dart';
-import 'package:cdk_flutter/cdk_flutter.dart' hide WalletProvider;
+import '../../src/rust/api/wallet.dart';
 import 'package:elcaju/l10n/app_localizations.dart';
 import '../../core/constants/colors.dart';
 import '../../core/constants/dimensions.dart';

lib/screens/8_settings/mint_detail_screen.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:lucide_icons/lucide_icons.dart';
-import 'package:cdk_flutter/cdk_flutter.dart' show MintInfo, ContactInfo;
+import '../../src/rust/api/mint_info.dart' show MintInfo, ContactInfo;
 import 'package:elcaju/l10n/app_localizations.dart';
 import '../../core/constants/colors.dart';
 import '../../core/utils/formatters.dart';

lib/screens/8_settings/mints_screen.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:lucide_icons/lucide_icons.dart';
 import 'package:provider/provider.dart';
-import 'package:cdk_flutter/cdk_flutter.dart' show MintInfo;
+import '../../src/rust/api/mint_info.dart' show MintInfo;
 import 'package:elcaju/l10n/app_localizations.dart';
 import '../../core/constants/colors.dart';
 import '../../core/constants/dimensions.dart';
@@ -623,7 +623,7 @@ class _AddMintDialogState extends State<_AddMintDialog> {
     });
 
     try {
-      // Intentar agregar el mint (cdk_flutter validará la conexión)
+      // Intentar agregar el mint (el bridge Rust validará la conexión)
       await widget.walletProvider.addMint(url);
 
       if (mounted) {

lib/screens/9_history/history_screen.dart

@@ -5,8 +5,8 @@ import 'package:provider/provider.dart';
 import 'package:lucide_icons/lucide_icons.dart';
 import 'package:qr_flutter/qr_flutter.dart';
 import 'package:intl/intl.dart';
-import 'package:cdk_flutter/cdk_flutter.dart' as cdk;
-import 'package:cdk_flutter/cdk_flutter.dart' show Transaction, TransactionDirection, TransactionStatus;
+import '../../src/rust/api/token.dart' as cdk;
+import '../../src/rust/api/wallet.dart' show Transaction, TransactionDirection, TransactionStatus;
 import 'package:elcaju/l10n/app_localizations.dart';
 import '../../core/constants/colors.dart';
 import '../../core/constants/dimensions.dart';

lib/widgets/scanner/qr_scanner_widget.dart

@@ -2,7 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:mobile_scanner/mobile_scanner.dart';
 import 'package:lucide_icons/lucide_icons.dart';
 import 'package:elcaju/l10n/app_localizations.dart';
-import 'package:cdk_flutter/cdk_flutter.dart';
+import '../../src/rust/api/token.dart';
 import '../../core/constants/colors.dart';
 import '../../core/utils/incoming_data_parser.dart';
 

linux/flutter/generated_plugins.cmake

@@ -8,7 +8,7 @@ list(APPEND FLUTTER_PLUGIN_LIST
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST
-  cdk_flutter
+  rust_builder
 )
 
 set(PLUGIN_BUNDLED_LIBRARIES)

pubspec.lock

@@ -161,15 +161,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "6.3.5"
-  cdk_flutter:
-    dependency: "direct main"
-    description:
-      path: "."
-      ref: HEAD
-      resolved-ref: "7fb8580530d963c9ff09f23e55a1e56bccd8676b"
-      url: "https://github.com/cashubtc/cdk_flutter.git"
-    source: git
-    version: "0.1.0"
   characters:
     dependency: transitive
     description:
@@ -814,6 +805,13 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "4.1.0"
+  rust_builder:
+    dependency: "direct main"
+    description:
+      path: rust_builder
+      relative: true
+    source: path
+    version: "0.1.0"
   share_plus:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -15,10 +15,9 @@ dependencies:
 
   cupertino_icons: ^1.0.8
 
-  # CDK Flutter (Cashu backend)
-  cdk_flutter:
-    git:
-      url: https://github.com/cashubtc/cdk_flutter.git
+  # Internal Rust bridge (Cashu backend via cdk)
+  rust_builder:
+    path: rust_builder
 
   # State Management
   provider: ^6.1.2

windows/flutter/generated_plugins.cmake

@@ -9,7 +9,7 @@ list(APPEND FLUTTER_PLUGIN_LIST
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST
-  cdk_flutter
+  rust_builder
 )
 
 set(PLUGIN_BUNDLED_LIBRARIES)