cake_wallet/cw_monero/lib/monero_wallet_service.dart

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import 'dart:io';
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import 'package:cw_core/monero_wallet_utils.dart';
import 'package:cw_core/pathForWallet.dart';
import 'package:cw_core/unspent_coins_info.dart';
import 'package:cw_core/wallet_base.dart';
import 'package:cw_core/wallet_credentials.dart';
import 'package:cw_core/wallet_info.dart';
import 'package:cw_core/wallet_service.dart';
import 'package:cw_core/wallet_type.dart';
import 'package:cw_monero/api/exceptions/wallet_opening_exception.dart';
import 'package:cw_monero/api/wallet_manager.dart' as monero_wallet_manager;
import 'package:cw_monero/monero_wallet.dart';
import 'package:hive/hive.dart';
class MoneroNewWalletCredentials extends WalletCredentials {
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MoneroNewWalletCredentials({required String name, required this.language, String? password})
: super(name: name, password: password);
final String language;
}
class MoneroRestoreWalletFromSeedCredentials extends WalletCredentials {
MoneroRestoreWalletFromSeedCredentials(
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{required String name, required this.mnemonic, int height = 0, String? password})
: super(name: name, password: password, height: height);
final String mnemonic;
}
class MoneroWalletLoadingException implements Exception {
@override
String toString() => 'Failure to load the wallet.';
}
class MoneroRestoreWalletFromKeysCredentials extends WalletCredentials {
MoneroRestoreWalletFromKeysCredentials(
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{required String name,
required String password,
required this.language,
required this.address,
required this.viewKey,
required this.spendKey,
int height = 0})
: super(name: name, password: password, height: height);
final String language;
final String address;
final String viewKey;
final String spendKey;
}
class MoneroWalletService extends WalletService<
MoneroNewWalletCredentials,
MoneroRestoreWalletFromSeedCredentials,
MoneroRestoreWalletFromKeysCredentials> {
MoneroWalletService(this.walletInfoSource, this.unspentCoinsInfoSource);
final Box<WalletInfo> walletInfoSource;
final Box<UnspentCoinsInfo> unspentCoinsInfoSource;
static bool walletFilesExist(String path) =>
!File(path).existsSync() && !File('$path.keys').existsSync();
@override
WalletType getType() => WalletType.monero;
@override
Future<MoneroWallet> create(MoneroNewWalletCredentials credentials) async {
try {
final path = await pathForWallet(name: credentials.name, type: getType());
await monero_wallet_manager.createWallet(
path: path,
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password: credentials.password!,
language: credentials.language);
final wallet = MoneroWallet(
walletInfo: credentials.walletInfo!, unspentCoinsInfo: unspentCoinsInfoSource);
await wallet.init();
return wallet;
} catch (e) {
// TODO: Implement Exception for wallet list service.
print('MoneroWalletsManager Error: ${e.toString()}');
rethrow;
}
}
@override
Future<bool> isWalletExit(String name) async {
try {
final path = await pathForWallet(name: name, type: getType());
return monero_wallet_manager.isWalletExist(path: path);
} catch (e) {
// TODO: Implement Exception for wallet list service.
print('MoneroWalletsManager Error: $e');
rethrow;
}
}
@override
Future<MoneroWallet> openWallet(String name, String password) async {
try {
final path = await pathForWallet(name: name, type: getType());
if (walletFilesExist(path)) {
await repairOldAndroidWallet(name);
}
await monero_wallet_manager
.openWalletAsync({'path': path, 'password': password});
final walletInfo = walletInfoSource.values.firstWhere(
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(info) => info.id == WalletBase.idFor(name, getType()));
final wallet = MoneroWallet(walletInfo: walletInfo, unspentCoinsInfo: unspentCoinsInfoSource);
final isValid = wallet.walletAddresses.validate();
if (!isValid) {
await restoreOrResetWalletFiles(name);
wallet.close();
return openWallet(name, password);
}
await wallet.init();
return wallet;
} catch (e) {
// TODO: Implement Exception for wallet list service.
if ((e.toString().contains('bad_alloc') ||
(e is WalletOpeningException &&
(e.message == 'std::bad_alloc' ||
e.message.contains('bad_alloc')))) ||
(e.toString().contains('does not correspond') ||
(e is WalletOpeningException &&
e.message.contains('does not correspond')))) {
await restoreOrResetWalletFiles(name);
return openWallet(name, password);
}
rethrow;
}
}
@override
Future<void> remove(String wallet) async {
final path = await pathForWalletDir(name: wallet, type: getType());
final file = Directory(path);
final isExist = file.existsSync();
if (isExist) {
await file.delete(recursive: true);
}
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final walletInfo = walletInfoSource.values
.firstWhere((info) => info.id == WalletBase.idFor(wallet, getType()));
await walletInfoSource.delete(walletInfo.key);
}
@override
Future<void> rename(
String currentName, String password, String newName) async {
final currentWalletInfo = walletInfoSource.values.firstWhere(
(info) => info.id == WalletBase.idFor(currentName, getType()));
final currentWallet =
MoneroWallet(walletInfo: currentWalletInfo, unspentCoinsInfo: unspentCoinsInfoSource);
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await currentWallet.renameWalletFiles(newName);
final newWalletInfo = currentWalletInfo;
newWalletInfo.id = WalletBase.idFor(newName, getType());
newWalletInfo.name = newName;
await walletInfoSource.put(currentWalletInfo.key, newWalletInfo);
}
@override
Future<MoneroWallet> restoreFromKeys(
MoneroRestoreWalletFromKeysCredentials credentials) async {
try {
final path = await pathForWallet(name: credentials.name, type: getType());
await monero_wallet_manager.restoreFromKeys(
path: path,
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password: credentials.password!,
language: credentials.language,
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restoreHeight: credentials.height!,
address: credentials.address,
viewKey: credentials.viewKey,
spendKey: credentials.spendKey);
final wallet = MoneroWallet(
walletInfo: credentials.walletInfo!, unspentCoinsInfo: unspentCoinsInfoSource);
await wallet.init();
return wallet;
} catch (e) {
// TODO: Implement Exception for wallet list service.
print('MoneroWalletsManager Error: $e');
rethrow;
}
}
@override
Future<MoneroWallet> restoreFromSeed(
MoneroRestoreWalletFromSeedCredentials credentials) async {
try {
final path = await pathForWallet(name: credentials.name, type: getType());
await monero_wallet_manager.restoreFromSeed(
path: path,
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password: credentials.password!,
seed: credentials.mnemonic,
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restoreHeight: credentials.height!);
final wallet = MoneroWallet(
walletInfo: credentials.walletInfo!, unspentCoinsInfo: unspentCoinsInfoSource);
await wallet.init();
return wallet;
} catch (e) {
// TODO: Implement Exception for wallet list service.
print('MoneroWalletsManager Error: $e');
rethrow;
}
}
Future<void> repairOldAndroidWallet(String name) async {
try {
if (!Platform.isAndroid) {
return;
}
final oldAndroidWalletDirPath =
await outdatedAndroidPathForWalletDir(name: name);
final dir = Directory(oldAndroidWalletDirPath);
if (!dir.existsSync()) {
return;
}
final newWalletDirPath =
await pathForWalletDir(name: name, type: getType());
dir.listSync().forEach((f) {
final file = File(f.path);
final name = f.path.split('/').last;
final newPath = newWalletDirPath + '/$name';
final newFile = File(newPath);
if (!newFile.existsSync()) {
newFile.createSync();
}
newFile.writeAsBytesSync(file.readAsBytesSync());
});
} catch (e) {
print(e.toString());
}
}
}