cake_wallet/cw_nano/lib/nano_wallet.dart

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import 'dart:convert';
import 'package:cw_core/crypto_currency.dart';
import 'package:cw_core/node.dart';
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import 'package:cw_core/pathForWallet.dart';
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import 'package:cw_core/pending_transaction.dart';
import 'package:cw_core/sync_status.dart';
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import 'package:cw_core/transaction_direction.dart';
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import 'package:cw_core/transaction_priority.dart';
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import 'package:cw_core/wallet_addresses.dart';
import 'package:cw_core/wallet_info.dart';
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import 'package:cw_nano/file.dart';
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import 'package:cw_nano/nano_balance.dart';
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import 'package:cw_nano/nano_client.dart';
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import 'package:cw_nano/nano_transaction_history.dart';
import 'package:cw_nano/nano_transaction_info.dart';
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import 'package:cw_nano/nano_util.dart';
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import 'package:cw_nano/nano_wallet_info.dart';
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import 'package:mobx/mobx.dart';
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import 'dart:async';
import 'package:cw_nano/nano_wallet_addresses.dart';
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import 'package:cw_core/wallet_base.dart';
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import 'package:web3dart/web3dart.dart';
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import 'package:bip39/bip39.dart' as bip39;
import 'package:bip32/bip32.dart' as bip32;
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part 'nano_wallet.g.dart';
class NanoWallet = NanoWalletBase with _$NanoWallet;
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abstract class NanoWalletBase
extends WalletBase<NanoBalance, NanoTransactionHistory, NanoTransactionInfo> with Store {
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NanoWalletBase({
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required NanoWalletInfo walletInfo,
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required String mnemonic,
required String password,
NanoBalance? initialBalance,
}) : syncStatus = NotConnectedSyncStatus(),
_password = password,
_mnemonic = mnemonic,
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_derivationType = walletInfo.derivationType,
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_isTransactionUpdating = false,
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_client = NanoClient(),
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walletAddresses = NanoWalletAddresses(walletInfo),
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balance = ObservableMap<CryptoCurrency, NanoBalance>.of({
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CryptoCurrency.nano: initialBalance ??
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NanoBalance(currentBalance: BigInt.zero, receivableBalance: BigInt.zero)
}),
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super(walletInfo) {
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this.walletInfo = walletInfo;
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transactionHistory = NanoTransactionHistory(walletInfo: walletInfo, password: password);
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}
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final String _mnemonic;
final String _password;
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final DerivationType _derivationType;
late final String _privateKey;
late final String _publicAddress;
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late final String _seedKey;
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late NanoClient _client;
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bool _isTransactionUpdating;
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@override
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WalletAddresses walletAddresses;
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@override
@observable
SyncStatus syncStatus;
@override
@observable
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late ObservableMap<CryptoCurrency, NanoBalance> balance;
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// initialize the different forms of private / public key we'll need:
Future<void> init() async {
final String type = (_derivationType == DerivationType.nano) ? "standard" : "hd";
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_seedKey = bip39.mnemonicToEntropy(_mnemonic).toUpperCase();
_privateKey = await NanoUtil.uniSeedToPrivate(_seedKey, 0, type);
_publicAddress = await NanoUtil.uniSeedToAddress(_seedKey, 0, type);
this.walletInfo.address = _publicAddress;
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await walletAddresses.init();
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await transactionHistory.init();
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await save();
}
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@override
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int calculateEstimatedFee(TransactionPriority priority, int? amount) {
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return 0; // always 0 :)
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}
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@override
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Future<void> changePassword(String password) {
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print("e");
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throw UnimplementedError("changePassword");
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}
@override
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void close() {
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_client.stop();
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}
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@action
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@override
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Future<void> connectToNode({required Node node}) async {
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try {
syncStatus = ConnectingSyncStatus();
final isConnected = _client.connect(node);
if (!isConnected) {
throw Exception("Ethereum Node connection failed");
}
// _client.setListeners(_privateKey.address, _onNewTransaction);
_updateBalance();
syncStatus = ConnectedSyncStatus();
} catch (e) {
syncStatus = FailedSyncStatus();
}
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}
@override
Future<PendingTransaction> createTransaction(Object credentials) async {
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print("g");
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print(credentials);
// throw UnimplementedError();
// final _credentials = credentials as EthereumTransactionCredentials;
// final outputs = _credentials.outputs;
// final hasMultiDestination = outputs.length > 1;
// final _erc20Balance = balance[_credentials.currency]!;
// BigInt totalAmount = BigInt.zero;
// int exponent =
// _credentials.currency is Erc20Token ? (_credentials.currency as Erc20Token).decimal : 18;
// BigInt amountToEthereumMultiplier = BigInt.from(pow(10, exponent));
// if (hasMultiDestination) {
// if (outputs.any((item) => item.sendAll || (item.formattedCryptoAmount ?? 0) <= 0)) {
// throw EthereumTransactionCreationException(_credentials.currency);
// }
// final totalOriginalAmount = EthereumFormatter.parseEthereumAmountToDouble(
// outputs.fold(0, (acc, value) => acc + (value.formattedCryptoAmount ?? 0)));
// totalAmount = BigInt.from(totalOriginalAmount) * amountToEthereumMultiplier;
// if (_erc20Balance.balance < totalAmount) {
// throw EthereumTransactionCreationException(_credentials.currency);
// }
// } else {
// final output = outputs.first;
// final BigInt allAmount = _erc20Balance.balance - BigInt.from(feeRate(_credentials.priority!));
// final totalOriginalAmount =
// EthereumFormatter.parseEthereumAmountToDouble(output.formattedCryptoAmount ?? 0);
// totalAmount = output.sendAll
// ? allAmount
// : BigInt.from(totalOriginalAmount) * amountToEthereumMultiplier;
// if (_erc20Balance.balance < totalAmount) {
// throw EthereumTransactionCreationException(_credentials.currency);
// }
// }
// final pendingEthereumTransaction = await _client.signTransaction(
// privateKey: _privateKey,
// toAddress: _credentials.outputs.first.address,
// amount: totalAmount.toString(),
// gas: _priorityFees[_credentials.priority!.raw],
// priority: _credentials.priority!,
// currency: _credentials.currency,
// exponent: exponent,
// contractAddress: _credentials.currency is Erc20Token
// ? (_credentials.currency as Erc20Token).contractAddress
// : null,
// );
// return pendingEthereumTransaction;
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}
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Future<void> updateTransactions() async {
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try {
if (_isTransactionUpdating) {
return;
}
_isTransactionUpdating = true;
final transactions = await fetchTransactions();
transactionHistory.addMany(transactions);
await transactionHistory.save();
_isTransactionUpdating = false;
} catch (_) {
_isTransactionUpdating = false;
}
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}
@override
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Future<Map<String, NanoTransactionInfo>> fetchTransactions() async {
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String address = _publicAddress;
final transactions = await _client.fetchTransactions(address);
final Map<String, NanoTransactionInfo> result = {};
for (var transactionModel in transactions) {
result[transactionModel.hash] = NanoTransactionInfo(
id: transactionModel.hash,
amountRaw: transactionModel.amount,
height: transactionModel.height,
direction: transactionModel.account == address
? TransactionDirection.outgoing
: TransactionDirection.incoming,
confirmed: transactionModel.confirmed,
date: transactionModel.date ?? DateTime.now(),
confirmations: transactionModel.confirmed ? 1 : 0,
);
}
return result;
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}
@override
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Object get keys {
print("j");
throw UnimplementedError("keys");
}
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@override
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Future<void> rescan({required int height}) async {
fetchTransactions();
_updateBalance();
return;
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}
@override
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Future<void> save() async {
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await walletAddresses.updateAddressesInBox();
final path = await makePath();
await write(path: path, password: _password, data: toJSON());
await transactionHistory.save();
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}
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@override
String get seed => _mnemonic;
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@action
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@override
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Future<void> startSync() async {
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try {
syncStatus = AttemptingSyncStatus();
await _updateBalance();
await updateTransactions();
syncStatus = SyncedSyncStatus();
} catch (e) {
syncStatus = FailedSyncStatus();
}
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}
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Future<String> makePath() async => pathForWallet(name: walletInfo.name, type: walletInfo.type);
String toJSON() => json.encode({
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'seedKey': _seedKey,
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'mnemonic': _mnemonic,
// 'balance': balance[currency]!.toJSON(),
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'derivationType': _derivationType.toString()
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});
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static Future<NanoWallet> open({
required String name,
required String password,
required WalletInfo walletInfo,
}) async {
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final path = await pathForWallet(name: name, type: walletInfo.type);
final jsonSource = await read(path: path, password: password);
final data = json.decode(jsonSource) as Map;
final mnemonic = data['mnemonic'] as String;
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final balance = NanoBalance.fromString(
formattedCurrentBalance: data['balance'] as String? ?? "0",
formattedReceivableBalance: "0");
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DerivationType derivationType = DerivationType.bip39;
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if (data['derivationType'] == "DerivationType.nano") {
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derivationType = DerivationType.nano;
}
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final nanoWalletInfo = NanoWalletInfo(
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walletInfo: walletInfo,
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derivationType: derivationType,
);
return NanoWallet(
walletInfo: nanoWalletInfo,
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password: password,
mnemonic: mnemonic,
initialBalance: balance,
);
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}
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Future<void> _updateBalance() async {
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balance[currency] = await _client.getBalance(_publicAddress);
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await save();
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}
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Future<void>? updateBalance() async => await _updateBalance();
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void _onNewTransaction(FilterEvent event) {
throw UnimplementedError();
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}
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@override
Future<void> renameWalletFiles(String newWalletName) async {
print("rename");
throw UnimplementedError();
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}
}