mirror of
https://github.com/cake-tech/cake_wallet.git
synced 2024-11-17 09:47:35 +00:00
1368 lines
43 KiB
Dart
1368 lines
43 KiB
Dart
import 'dart:async';
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import 'dart:convert';
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import 'dart:io';
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import 'dart:math';
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import 'package:bitcoin_base/bitcoin_base.dart';
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import 'package:bitcoin_flutter/bitcoin_flutter.dart' as bitcoin;
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import 'package:bitcoin_base/bitcoin_base.dart' as bitcoin_base;
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import 'package:collection/collection.dart';
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import 'package:cw_bitcoin/address_from_output.dart';
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import 'package:cw_bitcoin/bitcoin_address_record.dart';
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import 'package:cw_bitcoin/bitcoin_amount_format.dart';
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import 'package:cw_bitcoin/bitcoin_transaction_credentials.dart';
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import 'package:cw_bitcoin/bitcoin_transaction_priority.dart';
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import 'package:cw_bitcoin/bitcoin_unspent.dart';
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import 'package:cw_bitcoin/bitcoin_wallet_keys.dart';
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import 'package:cw_bitcoin/electrum.dart';
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import 'package:cw_bitcoin/electrum_balance.dart';
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import 'package:cw_bitcoin/electrum_transaction_history.dart';
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import 'package:cw_bitcoin/electrum_transaction_info.dart';
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import 'package:cw_bitcoin/electrum_wallet_addresses.dart';
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import 'package:cw_bitcoin/exceptions.dart';
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import 'package:cw_bitcoin/litecoin_network.dart';
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import 'package:cw_bitcoin/litecoin_wallet.dart';
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import 'package:cw_bitcoin/pending_bitcoin_transaction.dart';
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import 'package:cw_bitcoin/script_hash.dart';
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import 'package:cw_bitcoin/utils.dart';
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import 'package:cw_core/crypto_currency.dart';
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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';
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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/unspent_coins_info.dart';
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import 'package:cw_core/utils/file.dart';
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import 'package:cw_core/wallet_base.dart';
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import 'package:cw_core/wallet_info.dart';
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import 'package:flutter/foundation.dart';
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import 'package:hive/hive.dart';
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import 'package:mobx/mobx.dart';
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import 'package:rxdart/subjects.dart';
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import 'package:http/http.dart' as http;
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part 'electrum_wallet.g.dart';
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class ElectrumWallet = ElectrumWalletBase with _$ElectrumWallet;
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abstract class ElectrumWalletBase
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extends WalletBase<ElectrumBalance, ElectrumTransactionHistory, ElectrumTransactionInfo>
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with Store {
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ElectrumWalletBase(
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{required String password,
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required WalletInfo walletInfo,
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required Box<UnspentCoinsInfo> unspentCoinsInfo,
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required this.networkType,
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required this.mnemonic,
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required Uint8List seedBytes,
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List<BitcoinAddressRecord>? initialAddresses,
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ElectrumClient? electrumClient,
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ElectrumBalance? initialBalance,
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CryptoCurrency? currency})
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: hd = currency == CryptoCurrency.bch
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? bitcoinCashHDWallet(seedBytes)
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: bitcoin.HDWallet.fromSeed(seedBytes, network: networkType).derivePath("m/0'/0"),
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syncStatus = NotConnectedSyncStatus(),
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_password = password,
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_feeRates = <int>[],
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_isTransactionUpdating = false,
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isEnabledAutoGenerateSubaddress = true,
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unspentCoins = [],
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_scripthashesUpdateSubject = {},
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balance = ObservableMap<CryptoCurrency, ElectrumBalance>.of(currency != null
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? {
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currency:
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initialBalance ?? const ElectrumBalance(confirmed: 0, unconfirmed: 0, frozen: 0)
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}
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: {}),
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this.unspentCoinsInfo = unspentCoinsInfo,
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this.network = _getNetwork(networkType, currency),
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this.isTestnet = networkType == bitcoin.testnet,
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super(walletInfo) {
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this.electrumClient = electrumClient ?? ElectrumClient();
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this.walletInfo = walletInfo;
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transactionHistory = ElectrumTransactionHistory(walletInfo: walletInfo, password: password);
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}
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static bitcoin.HDWallet bitcoinCashHDWallet(Uint8List seedBytes) =>
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bitcoin.HDWallet.fromSeed(seedBytes).derivePath("m/44'/145'/0'/0");
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static int estimatedTransactionSize(int inputsCount, int outputsCounts) =>
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inputsCount * 68 + outputsCounts * 34 + 10;
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final bitcoin.HDWallet hd;
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final String mnemonic;
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@override
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@observable
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bool isEnabledAutoGenerateSubaddress;
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late ElectrumClient electrumClient;
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Box<UnspentCoinsInfo> unspentCoinsInfo;
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@override
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late ElectrumWalletAddresses walletAddresses;
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@override
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@observable
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late ObservableMap<CryptoCurrency, ElectrumBalance> balance;
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@override
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@observable
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SyncStatus syncStatus;
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List<String> get scriptHashes => walletAddresses.addressesByReceiveType
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.map((addr) => scriptHash(addr.address, network: network))
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.toList();
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List<String> get publicScriptHashes => walletAddresses.allAddresses
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.where((addr) => !addr.isHidden)
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.map((addr) => scriptHash(addr.address, network: network))
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.toList();
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String get xpub => hd.base58!;
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@override
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String get seed => mnemonic;
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bitcoin.NetworkType networkType;
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BasedUtxoNetwork network;
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@override
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bool? isTestnet;
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@override
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BitcoinWalletKeys get keys =>
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BitcoinWalletKeys(wif: hd.wif!, privateKey: hd.privKey!, publicKey: hd.pubKey!);
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String _password;
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List<BitcoinUnspent> unspentCoins;
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List<int> _feeRates;
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Map<String, BehaviorSubject<Object>?> _scripthashesUpdateSubject;
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bool _isTransactionUpdating;
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void Function(FlutterErrorDetails)? _onError;
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Future<void> init() async {
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await walletAddresses.init();
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await transactionHistory.init();
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await save();
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}
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@action
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@override
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Future<void> startSync() async {
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try {
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syncStatus = AttemptingSyncStatus();
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await updateTransactions();
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_subscribeForUpdates();
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if (this is! LitecoinWallet) {
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await updateUnspent();
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await updateBalance();
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}
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_feeRates = await electrumClient.feeRates(network: network);
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Timer.periodic(
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const Duration(minutes: 1), (timer) async => _feeRates = await electrumClient.feeRates());
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syncStatus = SyncedSyncStatus();
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} catch (e, stacktrace) {
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print(stacktrace);
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print(e.toString());
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syncStatus = FailedSyncStatus();
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}
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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 {
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syncStatus = ConnectingSyncStatus();
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await electrumClient.connectToUri(node.uri);
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electrumClient.onConnectionStatusChange = (bool isConnected) {
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if (!isConnected) {
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syncStatus = LostConnectionSyncStatus();
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}
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};
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syncStatus = ConnectedSyncStatus();
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} catch (e) {
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print(e.toString());
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syncStatus = FailedSyncStatus();
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}
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}
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int get _dustAmount => 546;
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bool _isBelowDust(int amount) => amount <= _dustAmount && network != BitcoinNetwork.testnet;
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Future<EstimatedTxResult> estimateSendAllTx(
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List<BitcoinOutput> outputs,
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int feeRate, {
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String? memo,
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int credentialsAmount = 0,
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}) async {
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final utxos = <UtxoWithAddress>[];
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List<ECPrivate> privateKeys = [];
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int allInputsAmount = 0;
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bool spendsUnconfirmedTX = false;
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for (int i = 0; i < unspentCoins.length; i++) {
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final utx = unspentCoins[i];
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if (utx.isSending && !utx.isFrozen) {
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if (!spendsUnconfirmedTX) spendsUnconfirmedTX = utx.confirmations == 0;
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allInputsAmount += utx.value;
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final address = addressTypeFromStr(utx.address, network);
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final privkey = generateECPrivate(
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hd: utx.bitcoinAddressRecord.isHidden ? walletAddresses.sideHd : walletAddresses.mainHd,
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index: utx.bitcoinAddressRecord.index,
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network: network);
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privateKeys.add(privkey);
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utxos.add(
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UtxoWithAddress(
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utxo: BitcoinUtxo(
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txHash: utx.hash,
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value: BigInt.from(utx.value),
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vout: utx.vout,
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scriptType: _getScriptType(address),
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),
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ownerDetails: UtxoAddressDetails(
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publicKey: privkey.getPublic().toHex(),
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address: address,
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),
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),
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);
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}
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}
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if (utxos.isEmpty) {
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throw BitcoinTransactionNoInputsException();
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}
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int estimatedSize;
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if (network is BitcoinCashNetwork) {
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estimatedSize = ForkedTransactionBuilder.estimateTransactionSize(
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utxos: utxos,
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outputs: outputs,
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network: network as BitcoinCashNetwork,
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memo: memo,
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);
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} else {
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estimatedSize = BitcoinTransactionBuilder.estimateTransactionSize(
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utxos: utxos,
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outputs: outputs,
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network: network,
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memo: memo,
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);
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}
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int fee = feeAmountWithFeeRate(feeRate, 0, 0, size: estimatedSize);
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if (fee == 0) {
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throw BitcoinTransactionNoFeeException();
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}
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// Here, when sending all, the output amount equals to the input value - fee to fully spend every input on the transaction and have no amount left for change
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int amount = allInputsAmount - fee;
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if (amount <= 0) {
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throw BitcoinTransactionWrongBalanceException();
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}
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// Attempting to send less than the dust limit
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if (_isBelowDust(amount)) {
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throw BitcoinTransactionNoDustException();
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}
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if (credentialsAmount > 0) {
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final amountLeftForFee = amount - credentialsAmount;
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if (amountLeftForFee > 0 && _isBelowDust(amountLeftForFee)) {
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amount -= amountLeftForFee;
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fee += amountLeftForFee;
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}
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}
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outputs[outputs.length - 1] =
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BitcoinOutput(address: outputs.last.address, value: BigInt.from(amount));
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return EstimatedTxResult(
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utxos: utxos,
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privateKeys: privateKeys,
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fee: fee,
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amount: amount,
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isSendAll: true,
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hasChange: false,
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memo: memo,
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spendsUnconfirmedTX: spendsUnconfirmedTX,
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);
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}
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Future<EstimatedTxResult> estimateTxForAmount(
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int credentialsAmount,
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List<BitcoinOutput> outputs,
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int feeRate, {
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int? inputsCount,
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String? memo,
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bool? useUnconfirmed,
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}) async {
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final utxos = <UtxoWithAddress>[];
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List<ECPrivate> privateKeys = [];
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int allInputsAmount = 0;
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bool spendsUnconfirmedTX = false;
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int leftAmount = credentialsAmount;
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final sendingCoins = unspentCoins.where((utx) => utx.isSending && !utx.isFrozen).toList();
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final unconfirmedCoins = sendingCoins.where((utx) => utx.confirmations == 0).toList();
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for (int i = 0; i < sendingCoins.length; i++) {
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final utx = sendingCoins[i];
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final isUncormirmed = utx.confirmations == 0;
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if (useUnconfirmed != true && isUncormirmed) continue;
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if (!spendsUnconfirmedTX) spendsUnconfirmedTX = isUncormirmed;
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allInputsAmount += utx.value;
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leftAmount = leftAmount - utx.value;
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final address = addressTypeFromStr(utx.address, network);
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final privkey = generateECPrivate(
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hd: utx.bitcoinAddressRecord.isHidden ? walletAddresses.sideHd : walletAddresses.mainHd,
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index: utx.bitcoinAddressRecord.index,
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network: network);
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privateKeys.add(privkey);
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utxos.add(
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UtxoWithAddress(
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utxo: BitcoinUtxo(
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txHash: utx.hash,
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value: BigInt.from(utx.value),
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vout: utx.vout,
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scriptType: _getScriptType(address),
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),
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ownerDetails: UtxoAddressDetails(
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publicKey: privkey.getPublic().toHex(),
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address: address,
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),
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),
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);
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bool amountIsAcquired = leftAmount <= 0;
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if ((inputsCount == null && amountIsAcquired) || inputsCount == i + 1) {
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break;
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}
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}
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if (utxos.isEmpty) {
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throw BitcoinTransactionNoInputsException();
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}
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final spendingAllCoins = sendingCoins.length == utxos.length;
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final spendingAllConfirmedCoins =
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!spendsUnconfirmedTX && utxos.length == sendingCoins.length - unconfirmedCoins.length;
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// How much is being spent - how much is being sent
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int amountLeftForChangeAndFee = allInputsAmount - credentialsAmount;
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if (amountLeftForChangeAndFee <= 0) {
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if (!spendingAllCoins) {
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return estimateTxForAmount(
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credentialsAmount,
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outputs,
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feeRate,
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inputsCount: utxos.length + 1,
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memo: memo,
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useUnconfirmed: useUnconfirmed ?? spendingAllConfirmedCoins,
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);
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}
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throw BitcoinTransactionWrongBalanceException();
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}
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final changeAddress = await walletAddresses.getChangeAddress();
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final address = addressTypeFromStr(changeAddress, network);
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outputs.add(BitcoinOutput(
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address: address,
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value: BigInt.from(amountLeftForChangeAndFee),
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));
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int estimatedSize;
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if (network is BitcoinCashNetwork) {
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estimatedSize = ForkedTransactionBuilder.estimateTransactionSize(
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utxos: utxos,
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outputs: outputs,
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network: network as BitcoinCashNetwork,
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memo: memo,
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);
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} else {
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estimatedSize = BitcoinTransactionBuilder.estimateTransactionSize(
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utxos: utxos,
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outputs: outputs,
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network: network,
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memo: memo,
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);
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}
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int fee = feeAmountWithFeeRate(feeRate, 0, 0, size: estimatedSize);
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if (fee == 0) {
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throw BitcoinTransactionNoFeeException();
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}
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int amount = credentialsAmount;
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final lastOutput = outputs.last;
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final amountLeftForChange = amountLeftForChangeAndFee - fee;
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if (!_isBelowDust(amountLeftForChange)) {
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// Here, lastOutput already is change, return the amount left without the fee to the user's address.
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outputs[outputs.length - 1] =
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BitcoinOutput(address: lastOutput.address, value: BigInt.from(amountLeftForChange));
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} else {
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// If has change that is lower than dust, will end up with tx rejected by network rules, so estimate again without the added change
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outputs.removeLast();
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// Still has inputs to spend before failing
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if (!spendingAllCoins) {
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return estimateTxForAmount(
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credentialsAmount,
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outputs,
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feeRate,
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inputsCount: utxos.length + 1,
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memo: memo,
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useUnconfirmed: useUnconfirmed ?? spendingAllConfirmedCoins,
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);
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}
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final estimatedSendAll = await estimateSendAllTx(
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outputs,
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feeRate,
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memo: memo,
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);
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if (estimatedSendAll.amount == credentialsAmount) {
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return estimatedSendAll;
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}
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// Estimate to user how much is needed to send to cover the fee
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final maxAmountWithReturningChange = allInputsAmount - _dustAmount - fee - 1;
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throw BitcoinTransactionNoDustOnChangeException(
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bitcoinAmountToString(amount: maxAmountWithReturningChange),
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bitcoinAmountToString(amount: estimatedSendAll.amount),
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);
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}
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// Attempting to send less than the dust limit
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if (_isBelowDust(amount)) {
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throw BitcoinTransactionNoDustException();
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}
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final totalAmount = amount + fee;
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if (totalAmount > balance[currency]!.confirmed) {
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throw BitcoinTransactionWrongBalanceException();
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}
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if (totalAmount > allInputsAmount) {
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if (spendingAllCoins) {
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throw BitcoinTransactionWrongBalanceException();
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} else {
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if (amountLeftForChangeAndFee > fee) {
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outputs.removeLast();
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}
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return estimateTxForAmount(
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credentialsAmount,
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outputs,
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feeRate,
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inputsCount: utxos.length + 1,
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memo: memo,
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useUnconfirmed: useUnconfirmed ?? spendingAllConfirmedCoins,
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);
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}
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}
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return EstimatedTxResult(
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utxos: utxos,
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privateKeys: privateKeys,
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fee: fee,
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amount: amount,
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hasChange: true,
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isSendAll: false,
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memo: memo,
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spendsUnconfirmedTX: spendsUnconfirmedTX,
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);
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}
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|
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@override
|
|
Future<PendingTransaction> createTransaction(Object credentials) async {
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try {
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final outputs = <BitcoinOutput>[];
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final transactionCredentials = credentials as BitcoinTransactionCredentials;
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final hasMultiDestination = transactionCredentials.outputs.length > 1;
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final sendAll = !hasMultiDestination && transactionCredentials.outputs.first.sendAll;
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final memo = transactionCredentials.outputs.first.memo;
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int credentialsAmount = 0;
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|
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for (final out in transactionCredentials.outputs) {
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final outputAmount = out.formattedCryptoAmount!;
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|
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if (!sendAll && _isBelowDust(outputAmount)) {
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throw BitcoinTransactionNoDustException();
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}
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|
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if (hasMultiDestination) {
|
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if (out.sendAll) {
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throw BitcoinTransactionWrongBalanceException();
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}
|
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}
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|
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credentialsAmount += outputAmount;
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|
|
final address =
|
|
addressTypeFromStr(out.isParsedAddress ? out.extractedAddress! : out.address, network);
|
|
|
|
if (sendAll) {
|
|
// The value will be changed after estimating the Tx size and deducting the fee from the total to be sent
|
|
outputs.add(BitcoinOutput(address: address, value: BigInt.from(0)));
|
|
} else {
|
|
outputs.add(BitcoinOutput(address: address, value: BigInt.from(outputAmount)));
|
|
}
|
|
}
|
|
|
|
final feeRateInt = transactionCredentials.feeRate != null
|
|
? transactionCredentials.feeRate!
|
|
: feeRate(transactionCredentials.priority!);
|
|
|
|
EstimatedTxResult estimatedTx;
|
|
if (sendAll) {
|
|
estimatedTx = await estimateSendAllTx(
|
|
outputs,
|
|
feeRateInt,
|
|
memo: memo,
|
|
credentialsAmount: credentialsAmount,
|
|
);
|
|
} else {
|
|
estimatedTx = await estimateTxForAmount(
|
|
credentialsAmount,
|
|
outputs,
|
|
feeRateInt,
|
|
memo: memo,
|
|
);
|
|
}
|
|
|
|
BasedBitcoinTransacationBuilder txb;
|
|
if (network is BitcoinCashNetwork) {
|
|
txb = ForkedTransactionBuilder(
|
|
utxos: estimatedTx.utxos,
|
|
outputs: outputs,
|
|
fee: BigInt.from(estimatedTx.fee),
|
|
network: network,
|
|
memo: estimatedTx.memo,
|
|
outputOrdering: BitcoinOrdering.none,
|
|
enableRBF: !estimatedTx.spendsUnconfirmedTX,
|
|
);
|
|
} else {
|
|
txb = BitcoinTransactionBuilder(
|
|
utxos: estimatedTx.utxos,
|
|
outputs: outputs,
|
|
fee: BigInt.from(estimatedTx.fee),
|
|
network: network,
|
|
memo: estimatedTx.memo,
|
|
outputOrdering: BitcoinOrdering.none,
|
|
enableRBF: !estimatedTx.spendsUnconfirmedTX,
|
|
);
|
|
}
|
|
|
|
bool hasTaprootInputs = false;
|
|
|
|
final transaction = txb.buildTransaction((txDigest, utxo, publicKey, sighash) {
|
|
final key = estimatedTx.privateKeys
|
|
.firstWhereOrNull((element) => element.getPublic().toHex() == publicKey);
|
|
|
|
if (key == null) {
|
|
throw Exception("Cannot find private key");
|
|
}
|
|
|
|
if (utxo.utxo.isP2tr()) {
|
|
hasTaprootInputs = true;
|
|
return key.signTapRoot(txDigest, sighash: sighash);
|
|
} else {
|
|
return key.signInput(txDigest, sigHash: sighash);
|
|
}
|
|
});
|
|
|
|
return PendingBitcoinTransaction(
|
|
transaction,
|
|
type,
|
|
electrumClient: electrumClient,
|
|
amount: estimatedTx.amount,
|
|
fee: estimatedTx.fee,
|
|
feeRate: feeRateInt.toString(),
|
|
network: network,
|
|
hasChange: estimatedTx.hasChange,
|
|
isSendAll: estimatedTx.isSendAll,
|
|
hasTaprootInputs: hasTaprootInputs,
|
|
)..addListener((transaction) async {
|
|
transactionHistory.addOne(transaction);
|
|
await updateBalance();
|
|
});
|
|
} catch (e) {
|
|
throw e;
|
|
}
|
|
}
|
|
|
|
String toJSON() => json.encode({
|
|
'mnemonic': mnemonic,
|
|
'account_index': walletAddresses.currentReceiveAddressIndexByType,
|
|
'change_address_index': walletAddresses.currentChangeAddressIndexByType,
|
|
'addresses': walletAddresses.allAddresses.map((addr) => addr.toJSON()).toList(),
|
|
'address_page_type': walletInfo.addressPageType == null
|
|
? SegwitAddresType.p2wpkh.toString()
|
|
: walletInfo.addressPageType.toString(),
|
|
'balance': balance[currency]?.toJSON(),
|
|
});
|
|
|
|
int feeRate(TransactionPriority priority) {
|
|
try {
|
|
if (priority is BitcoinTransactionPriority) {
|
|
return _feeRates[priority.raw];
|
|
}
|
|
|
|
return 0;
|
|
} catch (_) {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
int feeAmountForPriority(TransactionPriority priority, int inputsCount, int outputsCount,
|
|
{int? size}) =>
|
|
feeRate(priority) * (size ?? estimatedTransactionSize(inputsCount, outputsCount));
|
|
|
|
int feeAmountWithFeeRate(int feeRate, int inputsCount, int outputsCount, {int? size}) =>
|
|
feeRate * (size ?? estimatedTransactionSize(inputsCount, outputsCount));
|
|
|
|
@override
|
|
int calculateEstimatedFee(TransactionPriority? priority, int? amount,
|
|
{int? outputsCount, int? size}) {
|
|
if (priority is BitcoinTransactionPriority) {
|
|
return calculateEstimatedFeeWithFeeRate(feeRate(priority), amount,
|
|
outputsCount: outputsCount, size: size);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int calculateEstimatedFeeWithFeeRate(int feeRate, int? amount, {int? outputsCount, int? size}) {
|
|
if (size != null) {
|
|
return feeAmountWithFeeRate(feeRate, 0, 0, size: size);
|
|
}
|
|
|
|
int inputsCount = 0;
|
|
|
|
if (amount != null) {
|
|
int totalValue = 0;
|
|
|
|
for (final input in unspentCoins) {
|
|
if (totalValue >= amount) {
|
|
break;
|
|
}
|
|
|
|
if (input.isSending) {
|
|
totalValue += input.value;
|
|
inputsCount += 1;
|
|
}
|
|
}
|
|
|
|
if (totalValue < amount) return 0;
|
|
} else {
|
|
for (final input in unspentCoins) {
|
|
if (input.isSending) {
|
|
inputsCount += 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
// If send all, then we have no change value
|
|
final _outputsCount = outputsCount ?? (amount != null ? 2 : 1);
|
|
|
|
return feeAmountWithFeeRate(feeRate, inputsCount, _outputsCount);
|
|
}
|
|
|
|
@override
|
|
Future<void> save() async {
|
|
final path = await makePath();
|
|
await write(path: path, password: _password, data: toJSON());
|
|
await transactionHistory.save();
|
|
}
|
|
|
|
@override
|
|
Future<void> renameWalletFiles(String newWalletName) async {
|
|
final currentWalletPath = await pathForWallet(name: walletInfo.name, type: type);
|
|
final currentWalletFile = File(currentWalletPath);
|
|
|
|
final currentDirPath = await pathForWalletDir(name: walletInfo.name, type: type);
|
|
final currentTransactionsFile = File('$currentDirPath/$transactionsHistoryFileName');
|
|
|
|
// Copies current wallet files into new wallet name's dir and files
|
|
if (currentWalletFile.existsSync()) {
|
|
final newWalletPath = await pathForWallet(name: newWalletName, type: type);
|
|
await currentWalletFile.copy(newWalletPath);
|
|
}
|
|
if (currentTransactionsFile.existsSync()) {
|
|
final newDirPath = await pathForWalletDir(name: newWalletName, type: type);
|
|
await currentTransactionsFile.copy('$newDirPath/$transactionsHistoryFileName');
|
|
}
|
|
|
|
// Delete old name's dir and files
|
|
await Directory(currentDirPath).delete(recursive: true);
|
|
}
|
|
|
|
@override
|
|
Future<void> changePassword(String password) async {
|
|
_password = password;
|
|
await save();
|
|
await transactionHistory.changePassword(password);
|
|
}
|
|
|
|
@override
|
|
Future<void> rescan({required int height}) async => throw UnimplementedError();
|
|
|
|
@override
|
|
Future<void> close() async {
|
|
try {
|
|
await electrumClient.close();
|
|
} catch (_) {}
|
|
}
|
|
|
|
Future<String> makePath() async => pathForWallet(name: walletInfo.name, type: walletInfo.type);
|
|
|
|
Future<void> updateUnspentCoins() async {
|
|
List<BitcoinUnspent> updatedUnspentCoins = [];
|
|
|
|
final addressesSet = walletAddresses.allAddresses.map((addr) => addr.address).toSet();
|
|
|
|
await Future.wait(walletAddresses.allAddresses.map((address) => electrumClient
|
|
.getListUnspentWithAddress(address.address, network)
|
|
.then((unspent) => Future.forEach<Map<String, dynamic>>(unspent, (unspent) async {
|
|
try {
|
|
final coin = BitcoinUnspent.fromJSON(address, unspent);
|
|
final tx = await fetchTransactionInfo(
|
|
hash: coin.hash, height: 0, myAddresses: addressesSet);
|
|
coin.isChange = tx?.direction == TransactionDirection.outgoing;
|
|
coin.confirmations = tx?.confirmations;
|
|
updatedUnspentCoins.add(coin);
|
|
} catch (_) {}
|
|
}))));
|
|
|
|
unspentCoins = updatedUnspentCoins;
|
|
}
|
|
|
|
Future<void> updateUnspent() async {
|
|
await updateUnspentCoins();
|
|
|
|
if (unspentCoinsInfo.isEmpty) {
|
|
unspentCoins.forEach((coin) => _addCoinInfo(coin));
|
|
return;
|
|
}
|
|
|
|
if (unspentCoins.isNotEmpty) {
|
|
unspentCoins.forEach((coin) {
|
|
final coinInfoList = unspentCoinsInfo.values.where((element) =>
|
|
element.walletId.contains(id) &&
|
|
element.hash.contains(coin.hash) &&
|
|
element.vout == coin.vout);
|
|
|
|
if (coinInfoList.isNotEmpty) {
|
|
final coinInfo = coinInfoList.first;
|
|
|
|
coin.isFrozen = coinInfo.isFrozen;
|
|
coin.isSending = coinInfo.isSending;
|
|
coin.note = coinInfo.note;
|
|
coin.bitcoinAddressRecord.balance += coinInfo.value;
|
|
} else {
|
|
_addCoinInfo(coin);
|
|
}
|
|
});
|
|
}
|
|
|
|
await _refreshUnspentCoinsInfo();
|
|
}
|
|
|
|
Future<void> _addCoinInfo(BitcoinUnspent coin) async {
|
|
final newInfo = UnspentCoinsInfo(
|
|
walletId: id,
|
|
hash: coin.hash,
|
|
isFrozen: coin.isFrozen,
|
|
isSending: coin.isSending,
|
|
noteRaw: coin.note,
|
|
address: coin.bitcoinAddressRecord.address,
|
|
value: coin.value,
|
|
vout: coin.vout,
|
|
isChange: coin.isChange,
|
|
);
|
|
|
|
await unspentCoinsInfo.add(newInfo);
|
|
}
|
|
|
|
Future<void> _refreshUnspentCoinsInfo() async {
|
|
try {
|
|
final List<dynamic> keys = <dynamic>[];
|
|
final currentWalletUnspentCoins =
|
|
unspentCoinsInfo.values.where((element) => element.walletId.contains(id));
|
|
|
|
if (currentWalletUnspentCoins.isNotEmpty) {
|
|
currentWalletUnspentCoins.forEach((element) {
|
|
final existUnspentCoins = unspentCoins
|
|
.where((coin) => element.hash.contains(coin.hash) && element.vout == coin.vout);
|
|
|
|
if (existUnspentCoins.isEmpty) {
|
|
keys.add(element.key);
|
|
}
|
|
});
|
|
}
|
|
|
|
if (keys.isNotEmpty) {
|
|
await unspentCoinsInfo.deleteAll(keys);
|
|
}
|
|
} catch (e) {
|
|
print(e.toString());
|
|
}
|
|
}
|
|
|
|
Future<bool> canReplaceByFee(String hash) async {
|
|
final verboseTransaction = await electrumClient.getTransactionRaw(hash: hash);
|
|
final confirmations = verboseTransaction['confirmations'] as int? ?? 0;
|
|
final transactionHex = verboseTransaction['hex'] as String?;
|
|
|
|
if (confirmations > 0) return false;
|
|
|
|
if (transactionHex == null) {
|
|
return false;
|
|
}
|
|
|
|
final original = bitcoin.Transaction.fromHex(transactionHex);
|
|
|
|
return original.ins
|
|
.any((element) => element.sequence != null && element.sequence! < 4294967293);
|
|
}
|
|
|
|
Future<bool> isChangeSufficientForFee(String txId, int newFee) async {
|
|
final bundle = await getTransactionExpanded(hash: txId);
|
|
final outputs = bundle.originalTransaction.outputs;
|
|
|
|
final changeAddresses = walletAddresses.allAddresses.where((element) => element.isHidden);
|
|
|
|
// look for a change address in the outputs
|
|
final changeOutput = outputs.firstWhereOrNull((output) => changeAddresses.any(
|
|
(element) => element.address == addressFromOutputScript(output.scriptPubKey, network)));
|
|
|
|
var allInputsAmount = 0;
|
|
|
|
for (int i = 0; i < bundle.originalTransaction.inputs.length; i++) {
|
|
final input = bundle.originalTransaction.inputs[i];
|
|
final inputTransaction = bundle.ins[i];
|
|
final vout = input.txIndex;
|
|
final outTransaction = inputTransaction.outputs[vout];
|
|
allInputsAmount += outTransaction.amount.toInt();
|
|
}
|
|
|
|
int totalOutAmount = bundle.originalTransaction.outputs
|
|
.fold<int>(0, (previousValue, element) => previousValue + element.amount.toInt());
|
|
|
|
var currentFee = allInputsAmount - totalOutAmount;
|
|
|
|
int remainingFee = (newFee - currentFee > 0) ? newFee - currentFee : newFee;
|
|
|
|
return changeOutput != null && changeOutput.amount.toInt() - remainingFee >= 0;
|
|
}
|
|
|
|
Future<PendingBitcoinTransaction> replaceByFee(String hash, int newFee) async {
|
|
try {
|
|
final bundle = await getTransactionExpanded(hash: hash);
|
|
|
|
final utxos = <UtxoWithAddress>[];
|
|
List<ECPrivate> privateKeys = [];
|
|
|
|
var allInputsAmount = 0;
|
|
|
|
// Add inputs
|
|
for (var i = 0; i < bundle.originalTransaction.inputs.length; i++) {
|
|
final input = bundle.originalTransaction.inputs[i];
|
|
final inputTransaction = bundle.ins[i];
|
|
final vout = input.txIndex;
|
|
final outTransaction = inputTransaction.outputs[vout];
|
|
final address = addressFromOutputScript(outTransaction.scriptPubKey, network);
|
|
allInputsAmount += outTransaction.amount.toInt();
|
|
|
|
final addressRecord =
|
|
walletAddresses.allAddresses.firstWhere((element) => element.address == address);
|
|
|
|
final btcAddress = addressTypeFromStr(addressRecord.address, network);
|
|
final privkey = generateECPrivate(
|
|
hd: addressRecord.isHidden ? walletAddresses.sideHd : walletAddresses.mainHd,
|
|
index: addressRecord.index,
|
|
network: network);
|
|
|
|
privateKeys.add(privkey);
|
|
|
|
utxos.add(
|
|
UtxoWithAddress(
|
|
utxo: BitcoinUtxo(
|
|
txHash: input.txId,
|
|
value: outTransaction.amount,
|
|
vout: vout,
|
|
scriptType: _getScriptType(btcAddress),
|
|
),
|
|
ownerDetails:
|
|
UtxoAddressDetails(publicKey: privkey.getPublic().toHex(), address: btcAddress),
|
|
),
|
|
);
|
|
}
|
|
|
|
int totalOutAmount = bundle.originalTransaction.outputs
|
|
.fold<int>(0, (previousValue, element) => previousValue + element.amount.toInt());
|
|
|
|
var currentFee = allInputsAmount - totalOutAmount;
|
|
int remainingFee = newFee - currentFee;
|
|
|
|
final outputs = <BitcoinOutput>[];
|
|
|
|
// Add outputs and deduct the fees from it
|
|
for (int i = bundle.originalTransaction.outputs.length - 1; i >= 0; i--) {
|
|
final out = bundle.originalTransaction.outputs[i];
|
|
final address = addressFromOutputScript(out.scriptPubKey, network);
|
|
final btcAddress = addressTypeFromStr(address, network);
|
|
|
|
int newAmount;
|
|
if (out.amount.toInt() >= remainingFee) {
|
|
newAmount = out.amount.toInt() - remainingFee;
|
|
remainingFee = 0;
|
|
|
|
// if new amount of output is less than dust amount, then don't add this output as well
|
|
if (newAmount <= _dustAmount) {
|
|
continue;
|
|
}
|
|
} else {
|
|
remainingFee -= out.amount.toInt();
|
|
continue;
|
|
}
|
|
|
|
outputs.add(BitcoinOutput(address: btcAddress, value: BigInt.from(newAmount)));
|
|
}
|
|
|
|
final changeAddresses = walletAddresses.allAddresses.where((element) => element.isHidden);
|
|
|
|
// look for a change address in the outputs
|
|
final changeOutput = outputs.firstWhereOrNull((output) =>
|
|
changeAddresses.any((element) => element.address == output.address.toAddress(network)));
|
|
|
|
// deduct the change amount from the output amount
|
|
if (changeOutput != null) {
|
|
totalOutAmount -= changeOutput.value.toInt();
|
|
}
|
|
|
|
final txb = BitcoinTransactionBuilder(
|
|
utxos: utxos,
|
|
outputs: outputs,
|
|
fee: BigInt.from(newFee),
|
|
network: network,
|
|
enableRBF: true,
|
|
);
|
|
|
|
final transaction = txb.buildTransaction((txDigest, utxo, publicKey, sighash) {
|
|
final key =
|
|
privateKeys.firstWhereOrNull((element) => element.getPublic().toHex() == publicKey);
|
|
|
|
if (key == null) {
|
|
throw Exception("Cannot find private key");
|
|
}
|
|
|
|
if (utxo.utxo.isP2tr()) {
|
|
return key.signTapRoot(txDigest, sighash: sighash);
|
|
} else {
|
|
return key.signInput(txDigest, sigHash: sighash);
|
|
}
|
|
});
|
|
|
|
return PendingBitcoinTransaction(
|
|
transaction,
|
|
type,
|
|
electrumClient: electrumClient,
|
|
amount: totalOutAmount,
|
|
fee: newFee,
|
|
network: network,
|
|
hasChange: changeOutput != null,
|
|
feeRate: newFee.toString(),
|
|
)..addListener((transaction) async {
|
|
transactionHistory.addOne(transaction);
|
|
await updateBalance();
|
|
});
|
|
} catch (e) {
|
|
throw e;
|
|
}
|
|
}
|
|
|
|
Future<ElectrumTransactionBundle> getTransactionExpanded({required String hash}) async {
|
|
String transactionHex;
|
|
int? time;
|
|
int confirmations = 0;
|
|
if (network == BitcoinNetwork.testnet) {
|
|
// Testnet public electrum server does not support verbose transaction fetching
|
|
transactionHex = await electrumClient.getTransactionHex(hash: hash);
|
|
|
|
final status = json.decode(
|
|
(await http.get(Uri.parse("https://blockstream.info/testnet/api/tx/$hash/status"))).body);
|
|
|
|
time = status["block_time"] as int?;
|
|
final tip = await electrumClient.getCurrentBlockChainTip() ?? 0;
|
|
confirmations = tip - (status["block_height"] as int? ?? 0);
|
|
} else {
|
|
final verboseTransaction = await electrumClient.getTransactionRaw(hash: hash);
|
|
|
|
transactionHex = verboseTransaction['hex'] as String;
|
|
time = verboseTransaction['time'] as int?;
|
|
confirmations = verboseTransaction['confirmations'] as int? ?? 0;
|
|
}
|
|
|
|
final original = bitcoin_base.BtcTransaction.fromRaw(transactionHex);
|
|
final ins = <bitcoin_base.BtcTransaction>[];
|
|
|
|
for (final vin in original.inputs) {
|
|
final txHex = await electrumClient.getTransactionHex(hash: vin.txId);
|
|
final tx = bitcoin_base.BtcTransaction.fromRaw(txHex);
|
|
ins.add(tx);
|
|
}
|
|
|
|
return ElectrumTransactionBundle(
|
|
original,
|
|
ins: ins,
|
|
time: time,
|
|
confirmations: confirmations,
|
|
);
|
|
}
|
|
|
|
Future<ElectrumTransactionInfo?> fetchTransactionInfo(
|
|
{required String hash,
|
|
required int height,
|
|
required Set<String> myAddresses,
|
|
bool? retryOnFailure}) async {
|
|
try {
|
|
return ElectrumTransactionInfo.fromElectrumBundle(
|
|
await getTransactionExpanded(hash: hash), walletInfo.type, network,
|
|
addresses: myAddresses, height: height);
|
|
} catch (e) {
|
|
if (e is FormatException && retryOnFailure == true) {
|
|
await Future.delayed(const Duration(seconds: 2));
|
|
return fetchTransactionInfo(hash: hash, height: height, myAddresses: myAddresses);
|
|
}
|
|
return null;
|
|
}
|
|
}
|
|
|
|
@override
|
|
Future<Map<String, ElectrumTransactionInfo>> fetchTransactions() async {
|
|
try {
|
|
final Map<String, ElectrumTransactionInfo> historiesWithDetails = {};
|
|
final addressesSet = walletAddresses.allAddresses.map((addr) => addr.address).toSet();
|
|
final currentHeight = await electrumClient.getCurrentBlockChainTip() ?? 0;
|
|
|
|
await Future.wait(ADDRESS_TYPES.map((type) {
|
|
final addressesByType = walletAddresses.allAddresses.where((addr) => addr.type == type);
|
|
|
|
return Future.wait(addressesByType.map((addressRecord) async {
|
|
final history = await _fetchAddressHistory(addressRecord, addressesSet, currentHeight);
|
|
final balance = await electrumClient.getBalance(addressRecord.scriptHash!);
|
|
|
|
if (history.isNotEmpty) {
|
|
addressRecord.txCount = history.length;
|
|
addressRecord.balance = balance['confirmed'] as int? ?? 0;
|
|
historiesWithDetails.addAll(history);
|
|
|
|
final matchedAddresses =
|
|
addressesByType.where((addr) => addr.isHidden == addressRecord.isHidden);
|
|
|
|
final isLastUsedAddress =
|
|
history.isNotEmpty && addressRecord.address == matchedAddresses.last.address;
|
|
|
|
if (isLastUsedAddress) {
|
|
await walletAddresses.discoverAddresses(
|
|
matchedAddresses.toList(),
|
|
addressRecord.isHidden,
|
|
(address, addressesSet) =>
|
|
_fetchAddressHistory(address, addressesSet, currentHeight)
|
|
.then((history) => history.isNotEmpty ? address.address : null),
|
|
type: type);
|
|
}
|
|
}
|
|
}));
|
|
}));
|
|
|
|
return historiesWithDetails;
|
|
} catch (e) {
|
|
print(e.toString());
|
|
return {};
|
|
}
|
|
}
|
|
|
|
Future<Map<String, ElectrumTransactionInfo>> _fetchAddressHistory(
|
|
BitcoinAddressRecord addressRecord, Set<String> addressesSet, int currentHeight) async {
|
|
try {
|
|
final Map<String, ElectrumTransactionInfo> historiesWithDetails = {};
|
|
|
|
final history = await electrumClient
|
|
.getHistory(addressRecord.scriptHash ?? addressRecord.updateScriptHash(network));
|
|
|
|
if (history.isNotEmpty) {
|
|
addressRecord.setAsUsed();
|
|
|
|
await Future.wait(history.map((transaction) async {
|
|
final txid = transaction['tx_hash'] as String;
|
|
final height = transaction['height'] as int;
|
|
final storedTx = transactionHistory.transactions[txid];
|
|
|
|
if (storedTx != null) {
|
|
if (height > 0) {
|
|
storedTx.height = height;
|
|
// the tx's block itself is the first confirmation so add 1
|
|
storedTx.confirmations = currentHeight - height + 1;
|
|
storedTx.isPending = storedTx.confirmations == 0;
|
|
}
|
|
|
|
historiesWithDetails[txid] = storedTx;
|
|
} else {
|
|
final tx = await fetchTransactionInfo(
|
|
hash: txid, height: height, myAddresses: addressesSet, retryOnFailure: true);
|
|
|
|
if (tx != null) {
|
|
historiesWithDetails[txid] = tx;
|
|
|
|
// Got a new transaction fetched, add it to the transaction history
|
|
// instead of waiting all to finish, and next time it will be faster
|
|
transactionHistory.addOne(tx);
|
|
await transactionHistory.save();
|
|
}
|
|
}
|
|
|
|
return Future.value(null);
|
|
}));
|
|
}
|
|
|
|
return historiesWithDetails;
|
|
} catch (e) {
|
|
print(e.toString());
|
|
return {};
|
|
}
|
|
}
|
|
|
|
Future<void> updateTransactions() async {
|
|
try {
|
|
if (_isTransactionUpdating) {
|
|
return;
|
|
}
|
|
|
|
_isTransactionUpdating = true;
|
|
await fetchTransactions();
|
|
walletAddresses.updateReceiveAddresses();
|
|
_isTransactionUpdating = false;
|
|
} catch (e, stacktrace) {
|
|
print(stacktrace);
|
|
print(e);
|
|
_isTransactionUpdating = false;
|
|
}
|
|
}
|
|
|
|
void _subscribeForUpdates() {
|
|
scriptHashes.forEach((sh) async {
|
|
await _scripthashesUpdateSubject[sh]?.close();
|
|
_scripthashesUpdateSubject[sh] = electrumClient.scripthashUpdate(sh);
|
|
_scripthashesUpdateSubject[sh]?.listen((event) async {
|
|
try {
|
|
await updateUnspent();
|
|
await updateBalance();
|
|
await updateTransactions();
|
|
} catch (e, s) {
|
|
print(e.toString());
|
|
_onError?.call(FlutterErrorDetails(
|
|
exception: e,
|
|
stack: s,
|
|
library: this.runtimeType.toString(),
|
|
));
|
|
}
|
|
});
|
|
});
|
|
}
|
|
|
|
Future<ElectrumBalance> fetchBalances() async {
|
|
final addresses = walletAddresses.allAddresses.toList();
|
|
final balanceFutures = <Future<Map<String, dynamic>>>[];
|
|
for (var i = 0; i < addresses.length; i++) {
|
|
final addressRecord = addresses[i];
|
|
final sh = scriptHash(addressRecord.address, network: network);
|
|
final balanceFuture = electrumClient.getBalance(sh);
|
|
balanceFutures.add(balanceFuture);
|
|
}
|
|
|
|
var totalFrozen = 0;
|
|
unspentCoinsInfo.values.forEach((info) {
|
|
unspentCoins.forEach((element) {
|
|
if (element.hash == info.hash &&
|
|
element.vout == info.vout &&
|
|
info.isFrozen &&
|
|
element.bitcoinAddressRecord.address == info.address &&
|
|
element.value == info.value) {
|
|
totalFrozen += element.value;
|
|
}
|
|
});
|
|
});
|
|
|
|
final balances = await Future.wait(balanceFutures);
|
|
var totalConfirmed = 0;
|
|
var totalUnconfirmed = 0;
|
|
|
|
for (var i = 0; i < balances.length; i++) {
|
|
final addressRecord = addresses[i];
|
|
final balance = balances[i];
|
|
final confirmed = balance['confirmed'] as int? ?? 0;
|
|
final unconfirmed = balance['unconfirmed'] as int? ?? 0;
|
|
totalConfirmed += confirmed;
|
|
totalUnconfirmed += unconfirmed;
|
|
|
|
if (confirmed > 0 || unconfirmed > 0) {
|
|
addressRecord.setAsUsed();
|
|
}
|
|
}
|
|
|
|
return ElectrumBalance(
|
|
confirmed: totalConfirmed, unconfirmed: totalUnconfirmed, frozen: totalFrozen);
|
|
}
|
|
|
|
Future<void> updateBalance() async {
|
|
balance[currency] = await fetchBalances();
|
|
await save();
|
|
}
|
|
|
|
String getChangeAddress() {
|
|
const minCountOfHiddenAddresses = 5;
|
|
final random = Random();
|
|
var addresses = walletAddresses.allAddresses.where((addr) => addr.isHidden).toList();
|
|
|
|
if (addresses.length < minCountOfHiddenAddresses) {
|
|
addresses = walletAddresses.allAddresses.toList();
|
|
}
|
|
|
|
return addresses[random.nextInt(addresses.length)].address;
|
|
}
|
|
|
|
@override
|
|
void setExceptionHandler(void Function(FlutterErrorDetails) onError) => _onError = onError;
|
|
|
|
@override
|
|
String signMessage(String message, {String? address = null}) {
|
|
final index = address != null
|
|
? walletAddresses.allAddresses.firstWhere((element) => element.address == address).index
|
|
: null;
|
|
final HD = index == null ? hd : hd.derive(index);
|
|
return base64Encode(HD.signMessage(message));
|
|
}
|
|
|
|
static BasedUtxoNetwork _getNetwork(bitcoin.NetworkType networkType, CryptoCurrency? currency) {
|
|
if (networkType == bitcoin.bitcoin && currency == CryptoCurrency.bch) {
|
|
return BitcoinCashNetwork.mainnet;
|
|
}
|
|
|
|
if (networkType == litecoinNetwork) {
|
|
return LitecoinNetwork.mainnet;
|
|
}
|
|
|
|
if (networkType == bitcoin.testnet) {
|
|
return BitcoinNetwork.testnet;
|
|
}
|
|
|
|
return BitcoinNetwork.mainnet;
|
|
}
|
|
}
|
|
|
|
class EstimateTxParams {
|
|
EstimateTxParams(
|
|
{required this.amount,
|
|
required this.feeRate,
|
|
required this.priority,
|
|
required this.outputsCount,
|
|
required this.size});
|
|
|
|
final int amount;
|
|
final int feeRate;
|
|
final TransactionPriority priority;
|
|
final int outputsCount;
|
|
final int size;
|
|
}
|
|
|
|
class EstimatedTxResult {
|
|
EstimatedTxResult({
|
|
required this.utxos,
|
|
required this.privateKeys,
|
|
required this.fee,
|
|
required this.amount,
|
|
required this.hasChange,
|
|
required this.isSendAll,
|
|
this.memo,
|
|
required this.spendsUnconfirmedTX,
|
|
});
|
|
|
|
final List<UtxoWithAddress> utxos;
|
|
final List<ECPrivate> privateKeys;
|
|
final int fee;
|
|
final int amount;
|
|
final bool hasChange;
|
|
final bool isSendAll;
|
|
final String? memo;
|
|
final bool spendsUnconfirmedTX;
|
|
}
|
|
|
|
BitcoinBaseAddress addressTypeFromStr(String address, BasedUtxoNetwork network) {
|
|
if (network is BitcoinCashNetwork) {
|
|
if (!address.startsWith("bitcoincash:") &&
|
|
(address.startsWith("q") || address.startsWith("p"))) {
|
|
address = "bitcoincash:$address";
|
|
}
|
|
|
|
return BitcoinCashAddress(address).baseAddress;
|
|
}
|
|
|
|
if (P2pkhAddress.regex.hasMatch(address)) {
|
|
return P2pkhAddress.fromAddress(address: address, network: network);
|
|
} else if (P2shAddress.regex.hasMatch(address)) {
|
|
return P2shAddress.fromAddress(address: address, network: network);
|
|
} else if (P2wshAddress.regex.hasMatch(address)) {
|
|
return P2wshAddress.fromAddress(address: address, network: network);
|
|
} else if (P2trAddress.regex.hasMatch(address)) {
|
|
return P2trAddress.fromAddress(address: address, network: network);
|
|
} else if (MwebAddress.regex.hasMatch(address)) {
|
|
return MwebAddress.fromAddress(address: address, network: network);
|
|
} else {
|
|
return P2wpkhAddress.fromAddress(address: address, network: network);
|
|
}
|
|
}
|
|
|
|
BitcoinAddressType _getScriptType(BitcoinBaseAddress type) {
|
|
if (type is P2pkhAddress) {
|
|
return P2pkhAddressType.p2pkh;
|
|
} else if (type is P2shAddress) {
|
|
return P2shAddressType.p2wpkhInP2sh;
|
|
} else if (type is P2wshAddress) {
|
|
return SegwitAddresType.p2wsh;
|
|
} else if (type is P2trAddress) {
|
|
return SegwitAddresType.p2tr;
|
|
} else if (type is MwebAddress) {
|
|
return SegwitAddresType.mweb;
|
|
} else {
|
|
return SegwitAddresType.p2wpkh;
|
|
}
|
|
}
|