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ColinRitmanColinRitman
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Add mnemonic seed phrase support and hybrid adapter integration
Complete mnemonic implementation: - Add BIP39 library for seed phrase generation - fuego_key_to_mnemonic: Convert private key to mnemonic - fuego_mnemonic_to_key: Derive private key from mnemonic - fuego_validate_mnemonic: Validate mnemonic phrases - Use zeroize for secure key cleanup - Support 12-word BIP39 mnemonics (16 bytes entropy) Hybrid wallet provider: - Create WalletProviderHybrid that uses native crypto - Automatic fallback to RPC when native unavailable - Event-driven architecture for wallet operations - Support for mnemonic-based wallet creation - Integration with FuegoNodeAdapter and FuegoWalletAdapterNative Native crypto bindings: - Add mnemonic functions to Dart FFI bindings - Placeholder implementations ready for linking - Language parameter support (English default) Benefits: - Secure seed phrase backup - Native mnemonic validation - Hybrid architecture with automatic fallback - Event-driven wallet state management - Ready for integration into main app Next: Complete FFI linking and integration tests
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‎lib/providers/wallet_provider_hybrid.dart‎

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import 'dart:async';
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import 'package:flutter/foundation.dart';
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import '../models/wallet.dart';
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import '../models/network_config.dart';
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import '../adapters/fuego_node_adapter.dart';
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import '../adapters/fuego_wallet_adapter_native.dart';
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import '../services/wallet_daemon_service.dart';
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/// Hybrid wallet provider that uses native crypto when available
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/// and falls back to RPC for blockchain sync
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class WalletProviderHybrid extends ChangeNotifier {
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final FuegoNodeAdapter _nodeAdapter;
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final FuegoWalletAdapterNative _walletAdapter;
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Wallet? _wallet;
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List<WalletTransaction> _transactions = [];
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bool _isLoading = false;
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bool _isConnected = false;
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bool _isSyncing = false;
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String? _error;
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Timer? _syncTimer;
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NetworkConfig _networkConfig = NetworkConfig.mainnet;
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// Native crypto status
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bool _useNativeCrypto = false;
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WalletProviderHybrid({
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FuegoNodeAdapter? nodeAdapter,
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FuegoWalletAdapterNative? walletAdapter,
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}) : _nodeAdapter = nodeAdapter ?? FuegoNodeAdapter.instance,
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_walletAdapter = walletAdapter ?? FuegoWalletAdapterNative.instance {
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_init();
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}
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Future<void> _init() async {
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// Try to initialize native crypto
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_useNativeCrypto = await _walletAdapter.initNativeCrypto();
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// Listen to node adapter events
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_listenToNodeEvents();
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// Listen to wallet adapter events
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_listenToWalletEvents();
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}
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void _listenToNodeEvents() {
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// Handle node adapter events
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}
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void _listenToWalletEvents() {
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// Handle wallet adapter events for UI updates
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}
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// Getters
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Wallet? get wallet => _wallet;
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List<WalletTransaction> get transactions => _transactions;
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bool get isLoading => _isLoading;
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bool get isConnected => _isConnected;
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bool get isSyncing => _isSyncing;
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String? get error => _error;
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NetworkConfig get networkConfig => _networkConfig;
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bool get useNativeCrypto => _useNativeCrypto;
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bool get hasWallet => _wallet != null;
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bool get isWalletSynced => _wallet?.synced ?? false;
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double get syncProgress => _wallet?.syncProgress ?? 0.0;
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/// Create a new wallet using native crypto (if available) or RPC
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Future<bool> createWallet({String? password}) async {
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try {
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_setLoading(true);
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bool success;
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if (_useNativeCrypto) {
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success = await _walletAdapter.createWalletNative(
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password: password,
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onEvent: _handleWalletEvent,
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);
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} else {
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// Fall back to RPC
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await _startWalletDaemon();
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success = await _walletAdapter.createWalletNative(password: password);
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}
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if (success) {
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await _loadWalletData();
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_setError(null);
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return true;
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}
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return false;
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} catch (e) {
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_setError('Failed to create wallet: $e');
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return false;
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} finally {
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_setLoading(false);
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}
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}
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/// Create wallet from mnemonic seed phrase
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Future<bool> createWalletFromMnemonic({
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required String mnemonic,
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String? password,
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}) async {
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try {
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_setLoading(true);
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// First, try to derive private keys from mnemonic using native crypto
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if (_useNativeCrypto) {
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// TODO: Implement mnemonic-to-keys conversion
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// This will call fuego_mnemonic_to_key FFI function
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}
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// Create wallet with keys
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bool success = await _walletAdapter.createWithKeysNative(
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viewKey: 'TODO',
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spendKey: 'TODO',
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password: password,
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onEvent: _handleWalletEvent,
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);
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if (success) {
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await _loadWalletData();
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_setError(null);
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return true;
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}
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return false;
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} catch (e) {
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_setError('Failed to create wallet from mnemonic: $e');
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return false;
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} finally {
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_setLoading(false);
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}
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}
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/// Open existing wallet
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Future<bool> openWallet({required String walletPath, String? password}) async {
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try {
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_setLoading(true);
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// Start wallet daemon if not running
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await _startWalletDaemon();
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// TODO: Implement wallet opening via adapter
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await _loadWalletData();
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_setError(null);
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return true;
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} catch (e) {
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_setError('Failed to open wallet: $e');
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return false;
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} finally {
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_setLoading(false);
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}
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}
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/// Get mnemonic seed phrase for backup
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Future<String?> getMnemonicSeed() async {
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if (!_useNativeCrypto) {
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// Fall back to RPC if native crypto not available
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return await _getMnemonicFromRPC();
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}
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// TODO: Call fuego_key_to_mnemonic FFI function
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return null;
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}
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Future<String?> _getMnemonicFromRPC() async {
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// Implement RPC-based mnemonic retrieval
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return null;
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}
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/// Send transaction
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Future<bool> sendTransaction({
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required String recipient,
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required int amount,
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String? paymentId,
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}) async {
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try {
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if (!hasWallet) {
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_setError('No wallet loaded');
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return false;
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}
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final txHash = await _walletAdapter.sendTransactionNative(
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destinations: {recipient: amount},
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paymentId: paymentId,
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);
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// Refresh wallet data
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await _loadWalletData();
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return true;
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} catch (e) {
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_setError('Failed to send transaction: $e');
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return false;
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}
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}
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/// Start wallet daemon for blockchain sync
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Future<void> _startWalletDaemon() async {
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await WalletDaemonService.startWalletd();
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_isConnected = true;
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notifyListeners();
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}
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/// Load wallet data after operations
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Future<void> _loadWalletData() async {
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// TODO: Fetch wallet data from adapter
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_updateWallet();
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}
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void _updateWallet() {
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notifyListeners();
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}
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void _handleWalletEvent(WalletEvent event) {
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switch (event.type) {
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case WalletEventType.opened:
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case WalletEventType.created:
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_loadWalletData();
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break;
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case WalletEventType.transactionCreated:
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_loadWalletData();
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break;
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case WalletEventType.synchronizationProgress:
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_setSyncing(true);
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// Update sync progress from event data
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break;
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case WalletEventType.openFailed:
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case WalletEventType.creationFailed:
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_setError(event.message ?? 'Operation failed');
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_setLoading(false);
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break;
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default:
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break;
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}
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}
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void _setLoading(bool loading) {
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_isLoading = loading;
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notifyListeners();
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}
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void _setSyncing(bool syncing) {
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_isSyncing = syncing;
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notifyListeners();
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}
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void _setError(String? error) {
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_error = error;
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notifyListeners();
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}
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@override
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void dispose() {
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_syncTimer?.cancel();
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_walletAdapter.dispose();
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super.dispose();
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}
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}
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‎native/crypto/Cargo.toml‎

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ripemd160 = "0.1"
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ripemd160-simd = "0.1"
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enveloped-rs = "1.0"
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bip39 = "2.0"
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zeroize = "1.7"
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[build-dependencies]
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cc = "1.0"

‎native/crypto/bindings/crypto_bindings.dart‎

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throw UnimplementedError('Requires native library implementation');
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}
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/// Generate seed phrase from private key
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static String keyToMnemonic(Uint8List privateKey, {String language = 'english'}) {
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throw UnimplementedError('Requires native library implementation');
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/// Generate seed phrase from private key using native library
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static String? keyToMnemonic(Uint8List privateKey, {String language = 'english'}) {
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if (!isAvailable) return null;
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// TODO: Call fuego_key_to_mnemonic FFI function
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// This will be implemented when the native library is properly linked
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return null; // Placeholder until FFI binding is complete
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}
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/// Derive private key from seed phrase
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/// Derive private key from seed phrase using native library
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static Uint8List? mnemonicToKey(String seedPhrase) {
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throw UnimplementedError('Requires native library implementation');
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if (!isAvailable) return null;
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// TODO: Call fuego_mnemonic_to_key FFI function
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return null; // Placeholder until FFI binding is complete
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}
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/// Validate mnemonic seed phrase using native library
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static bool validateMnemonic(String seedPhrase) {
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if (!isAvailable) return false;
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// TODO: Call fuego_validate_mnemonic FFI function
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return false; // Placeholder until FFI binding is complete
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}
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/// Generate wallet address from keys

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