mirror of
https://github.com/cake-tech/cake_wallet.git
synced 2024-12-24 20:49:28 +00:00
2490 lines
79 KiB
Dart
2490 lines
79 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:isolate';
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import 'package:bitcoin_base/bitcoin_base.dart';
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import 'package:cw_bitcoin/litecoin_wallet_addresses.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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import 'package:cw_core/encryption_file_utils.dart';
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import 'package:blockchain_utils/blockchain_utils.dart';
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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_derivations.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_wallet.dart';
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import 'package:cw_bitcoin/pending_bitcoin_transaction.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/wallet_base.dart';
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import 'package:cw_core/wallet_info.dart';
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import 'package:cw_core/wallet_keys_file.dart';
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import 'package:cw_core/wallet_type.dart';
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import 'package:cw_core/get_height_by_date.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:sp_scanner/sp_scanner.dart';
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import 'package:hex/hex.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, WalletKeysFile {
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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.network,
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required this.encryptionFileUtils,
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String? xpub,
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String? mnemonic,
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Uint8List? seedBytes,
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this.passphrase,
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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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this.alwaysScan,
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}) : accountHD =
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getAccountHDWallet(currency, network, seedBytes, xpub, walletInfo.derivationInfo),
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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: initialBalance ??
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ElectrumBalance(
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confirmed: 0,
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unconfirmed: 0,
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frozen: 0,
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)
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}
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: {}),
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this.unspentCoinsInfo = unspentCoinsInfo,
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this.isTestnet = !network.isMainnet,
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this._mnemonic = mnemonic,
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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(
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walletInfo: walletInfo,
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password: password,
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encryptionFileUtils: encryptionFileUtils,
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);
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reaction((_) => syncStatus, _syncStatusReaction);
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sharedPrefs.complete(SharedPreferences.getInstance());
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}
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static Bip32Slip10Secp256k1 getAccountHDWallet(CryptoCurrency? currency, BasedUtxoNetwork network,
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Uint8List? seedBytes, String? xpub, DerivationInfo? derivationInfo) {
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if (seedBytes == null && xpub == null) {
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throw Exception(
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"To create a Wallet you need either a seed or an xpub. This should not happen");
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}
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if (seedBytes != null) {
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switch (currency) {
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case CryptoCurrency.btc:
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case CryptoCurrency.ltc:
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return Bip32Slip10Secp256k1.fromSeed(seedBytes).derivePath(
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_hardenedDerivationPath(derivationInfo?.derivationPath ?? electrum_path))
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as Bip32Slip10Secp256k1;
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case CryptoCurrency.bch:
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return bitcoinCashHDWallet(seedBytes);
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default:
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throw Exception("Unsupported currency");
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}
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}
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return Bip32Slip10Secp256k1.fromExtendedKey(xpub!);
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}
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static Bip32Slip10Secp256k1 bitcoinCashHDWallet(Uint8List seedBytes) =>
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Bip32Slip10Secp256k1.fromSeed(seedBytes).derivePath("m/44'/145'/0'") as Bip32Slip10Secp256k1;
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static int estimatedTransactionSize(int inputsCount, int outputsCounts) =>
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inputsCount * 68 + outputsCounts * 34 + 10;
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bool? alwaysScan;
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final Bip32Slip10Secp256k1 accountHD;
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final String? _mnemonic;
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Bip32Slip10Secp256k1 get hd => accountHD.childKey(Bip32KeyIndex(0));
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Bip32Slip10Secp256k1 get sideHd => accountHD.childKey(Bip32KeyIndex(1));
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final EncryptionFileUtils encryptionFileUtils;
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@override
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final String? passphrase;
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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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Set<String> get addressesSet => walletAddresses.allAddresses.map((addr) => addr.address).toSet();
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List<String> get scriptHashes => walletAddresses.addressesByReceiveType
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.where((addr) => RegexUtils.addressTypeFromStr(addr.address, network) is! MwebAddress)
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.map((addr) => (addr as BitcoinAddressRecord).getScriptHash(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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.where((addr) => RegexUtils.addressTypeFromStr(addr.address, network) is! MwebAddress)
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.map((addr) => addr.getScriptHash(network))
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.toList();
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String get xpub => accountHD.publicKey.toExtended;
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@override
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String? get seed => _mnemonic;
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@override
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WalletKeysData get walletKeysData =>
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WalletKeysData(mnemonic: _mnemonic, xPub: xpub, passphrase: passphrase);
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@override
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String get password => _password;
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BasedUtxoNetwork network;
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@override
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bool isTestnet;
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bool get hasSilentPaymentsScanning => type == WalletType.bitcoin;
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@observable
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bool nodeSupportsSilentPayments = true;
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@observable
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bool silentPaymentsScanningActive = false;
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bool _isTryingToConnect = false;
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Completer<SharedPreferences> sharedPrefs = Completer();
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Future<bool> checkIfMempoolAPIIsEnabled() async {
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bool isMempoolAPIEnabled = (await sharedPrefs.future).getBool("use_mempool_fee_api") ?? true;
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return isMempoolAPIEnabled;
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}
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@action
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Future<void> setSilentPaymentsScanning(bool active) async {
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silentPaymentsScanningActive = active;
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if (active) {
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syncStatus = AttemptingScanSyncStatus();
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final tip = await getUpdatedChainTip();
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if (tip == walletInfo.restoreHeight) {
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syncStatus = SyncedTipSyncStatus(tip);
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return;
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}
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if (tip > walletInfo.restoreHeight) {
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_setListeners(walletInfo.restoreHeight, chainTipParam: _currentChainTip);
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}
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} else {
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alwaysScan = false;
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_isolate?.then((value) => value.kill(priority: Isolate.immediate));
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if (electrumClient.isConnected) {
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syncStatus = SyncedSyncStatus();
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} else {
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syncStatus = NotConnectedSyncStatus();
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}
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}
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}
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int? _currentChainTip;
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Future<int> getCurrentChainTip() async {
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if (_currentChainTip != null) {
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return _currentChainTip!;
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}
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_currentChainTip = await electrumClient.getCurrentBlockChainTip() ?? 0;
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return _currentChainTip!;
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}
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Future<int> getUpdatedChainTip() async {
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final newTip = await electrumClient.getCurrentBlockChainTip();
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if (newTip != null && newTip > (_currentChainTip ?? 0)) {
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_currentChainTip = newTip;
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}
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return _currentChainTip ?? 0;
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}
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@override
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BitcoinWalletKeys get keys => BitcoinWalletKeys(
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wif: WifEncoder.encode(hd.privateKey.raw, netVer: network.wifNetVer),
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privateKey: hd.privateKey.toHex(),
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publicKey: hd.publicKey.toHex(),
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);
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String _password;
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List<BitcoinUnspent> unspentCoins;
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List<int> _feeRates;
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// ignore: prefer_final_fields
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Map<String, BehaviorSubject<Object>?> _scripthashesUpdateSubject;
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// ignore: prefer_final_fields
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BehaviorSubject<Object>? _chainTipUpdateSubject;
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bool _isTransactionUpdating;
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Future<Isolate>? _isolate;
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void Function(FlutterErrorDetails)? _onError;
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Timer? _autoSaveTimer;
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StreamSubscription<dynamic>? _receiveStream;
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Timer? _updateFeeRateTimer;
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static const int _autoSaveInterval = 1;
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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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_autoSaveTimer =
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Timer.periodic(Duration(minutes: _autoSaveInterval), (_) async => await save());
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}
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@action
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Future<void> _setListeners(int height, {int? chainTipParam, bool? doSingleScan}) async {
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final chainTip = chainTipParam ?? await getUpdatedChainTip();
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if (chainTip == height) {
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syncStatus = SyncedSyncStatus();
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return;
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}
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syncStatus = AttemptingScanSyncStatus();
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if (_isolate != null) {
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final runningIsolate = await _isolate!;
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runningIsolate.kill(priority: Isolate.immediate);
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}
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final receivePort = ReceivePort();
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_isolate = Isolate.spawn(
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startRefresh,
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ScanData(
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sendPort: receivePort.sendPort,
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silentAddress: walletAddresses.silentAddress!,
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network: network,
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height: height,
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chainTip: chainTip,
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electrumClient: ElectrumClient(),
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transactionHistoryIds: transactionHistory.transactions.keys.toList(),
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node: (await getNodeSupportsSilentPayments()) == true
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? ScanNode(node!.uri, node!.useSSL)
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: null,
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labels: walletAddresses.labels,
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labelIndexes: walletAddresses.silentAddresses
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.where((addr) => addr.type == SilentPaymentsAddresType.p2sp && addr.index >= 1)
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.map((addr) => addr.index)
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.toList(),
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isSingleScan: doSingleScan ?? false,
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));
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_receiveStream?.cancel();
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_receiveStream = receivePort.listen((var message) async {
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if (message is Map<String, ElectrumTransactionInfo>) {
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for (final map in message.entries) {
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final txid = map.key;
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final tx = map.value;
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if (tx.unspents != null) {
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final existingTxInfo = transactionHistory.transactions[txid];
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final txAlreadyExisted = existingTxInfo != null;
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// Updating tx after re-scanned
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if (txAlreadyExisted) {
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existingTxInfo.amount = tx.amount;
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existingTxInfo.confirmations = tx.confirmations;
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existingTxInfo.height = tx.height;
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final newUnspents = tx.unspents!
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.where((unspent) => !(existingTxInfo.unspents?.any((element) =>
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element.hash.contains(unspent.hash) &&
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element.vout == unspent.vout &&
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element.value == unspent.value) ??
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false))
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.toList();
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if (newUnspents.isNotEmpty) {
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newUnspents.forEach(_updateSilentAddressRecord);
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existingTxInfo.unspents ??= [];
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existingTxInfo.unspents!.addAll(newUnspents);
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final newAmount = newUnspents.length > 1
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? newUnspents.map((e) => e.value).reduce((value, unspent) => value + unspent)
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: newUnspents[0].value;
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if (existingTxInfo.direction == TransactionDirection.incoming) {
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existingTxInfo.amount += newAmount;
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}
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// Updates existing TX
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transactionHistory.addOne(existingTxInfo);
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// Update balance record
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balance[currency]!.confirmed += newAmount;
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}
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} else {
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// else: First time seeing this TX after scanning
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tx.unspents!.forEach(_updateSilentAddressRecord);
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// Add new TX record
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transactionHistory.addMany(message);
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// Update balance record
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balance[currency]!.confirmed += tx.amount;
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}
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await updateAllUnspents();
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}
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}
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}
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if (message is SyncResponse) {
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if (message.syncStatus is UnsupportedSyncStatus) {
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nodeSupportsSilentPayments = false;
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}
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syncStatus = message.syncStatus;
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await walletInfo.updateRestoreHeight(message.height);
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}
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});
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}
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void _updateSilentAddressRecord(BitcoinSilentPaymentsUnspent unspent) {
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final silentAddress = walletAddresses.silentAddress!;
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final silentPaymentAddress = SilentPaymentAddress(
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version: silentAddress.version,
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B_scan: silentAddress.B_scan,
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B_spend: unspent.silentPaymentLabel != null
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? silentAddress.B_spend.tweakAdd(
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BigintUtils.fromBytes(BytesUtils.fromHexString(unspent.silentPaymentLabel!)),
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)
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: silentAddress.B_spend,
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network: network,
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);
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final addressRecord = walletAddresses.silentAddresses
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.firstWhereOrNull((address) => address.address == silentPaymentAddress.toString());
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addressRecord?.txCount += 1;
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addressRecord?.balance += unspent.value;
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walletAddresses.addSilentAddresses(
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[unspent.bitcoinAddressRecord as BitcoinSilentPaymentAddressRecord],
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);
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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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if (syncStatus is SyncronizingSyncStatus) {
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return;
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}
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syncStatus = SyncronizingSyncStatus();
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if (hasSilentPaymentsScanning) {
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await _setInitialHeight();
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}
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await subscribeForUpdates();
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await updateTransactions();
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await updateAllUnspents();
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await updateBalance();
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await updateFeeRates();
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_updateFeeRateTimer ??=
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Timer.periodic(const Duration(minutes: 1), (timer) async => await updateFeeRates());
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if (alwaysScan == true) {
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_setListeners(walletInfo.restoreHeight);
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} else {
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syncStatus = SyncedSyncStatus();
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}
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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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|
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@action
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Future<void> updateFeeRates() async {
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if (await checkIfMempoolAPIIsEnabled()) {
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try {
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final response =
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await http.get(Uri.parse("http://mempool.cakewallet.com:8999/api/v1/fees/recommended"));
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final result = json.decode(response.body) as Map<String, num>;
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final slowFee = result['economyFee']?.toInt() ?? 0;
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final mediumFee = result['hourFee']?.toInt() ?? 0;
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final fastFee = result['fastestFee']?.toInt() ?? 0;
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_feeRates = [slowFee, mediumFee, fastFee];
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return;
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} catch (_) {}
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}
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final feeRates = await electrumClient.feeRates(network: network);
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if (feeRates != [0, 0, 0]) {
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_feeRates = feeRates;
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} else if (isTestnet) {
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_feeRates = [1, 1, 1];
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}
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}
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Node? node;
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Future<bool> getNodeIsElectrs() async {
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if (node == null) {
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return false;
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}
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final version = await electrumClient.version();
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if (version.isNotEmpty) {
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final server = version[0];
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if (server.toLowerCase().contains('electrs')) {
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node!.isElectrs = true;
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node!.save();
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return node!.isElectrs!;
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}
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}
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node!.isElectrs = false;
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node!.save();
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return node!.isElectrs!;
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}
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|
|
|
Future<bool> getNodeSupportsSilentPayments() async {
|
|
// As of today (august 2024), only ElectrumRS supports silent payments
|
|
if (!(await getNodeIsElectrs())) {
|
|
return false;
|
|
}
|
|
|
|
if (node == null) {
|
|
return false;
|
|
}
|
|
|
|
try {
|
|
final tweaksResponse = await electrumClient.getTweaks(height: 0);
|
|
|
|
if (tweaksResponse != null) {
|
|
node!.supportsSilentPayments = true;
|
|
node!.save();
|
|
return node!.supportsSilentPayments!;
|
|
}
|
|
} on RequestFailedTimeoutException catch (_) {
|
|
node!.supportsSilentPayments = false;
|
|
node!.save();
|
|
return node!.supportsSilentPayments!;
|
|
} catch (_) {}
|
|
|
|
node!.supportsSilentPayments = false;
|
|
node!.save();
|
|
return node!.supportsSilentPayments!;
|
|
}
|
|
|
|
@action
|
|
@override
|
|
Future<void> connectToNode({required Node node}) async {
|
|
this.node = node;
|
|
|
|
try {
|
|
syncStatus = ConnectingSyncStatus();
|
|
|
|
await _receiveStream?.cancel();
|
|
await electrumClient.close();
|
|
|
|
electrumClient.onConnectionStatusChange = _onConnectionStatusChange;
|
|
|
|
await electrumClient.connectToUri(node.uri, useSSL: node.useSSL);
|
|
} catch (e, stacktrace) {
|
|
print(stacktrace);
|
|
print(e.toString());
|
|
syncStatus = FailedSyncStatus();
|
|
}
|
|
}
|
|
|
|
int get _dustAmount => 546;
|
|
|
|
bool _isBelowDust(int amount) => amount <= _dustAmount && network != BitcoinNetwork.testnet;
|
|
|
|
UtxoDetails _createUTXOS({
|
|
required bool sendAll,
|
|
required int credentialsAmount,
|
|
required bool paysToSilentPayment,
|
|
int? inputsCount,
|
|
}) {
|
|
List<UtxoWithAddress> utxos = [];
|
|
List<Outpoint> vinOutpoints = [];
|
|
List<ECPrivateInfo> inputPrivKeyInfos = [];
|
|
final publicKeys = <String, PublicKeyWithDerivationPath>{};
|
|
int allInputsAmount = 0;
|
|
bool spendsSilentPayment = false;
|
|
bool spendsUnconfirmedTX = false;
|
|
|
|
int leftAmount = credentialsAmount;
|
|
final availableInputs = unspentCoins.where((utx) => utx.isSending && !utx.isFrozen).toList();
|
|
final unconfirmedCoins = availableInputs.where((utx) => utx.confirmations == 0).toList();
|
|
|
|
for (int i = 0; i < availableInputs.length; i++) {
|
|
final utx = availableInputs[i];
|
|
if (!spendsUnconfirmedTX) spendsUnconfirmedTX = utx.confirmations == 0;
|
|
|
|
if (paysToSilentPayment) {
|
|
// Check inputs for shared secret derivation
|
|
if (utx.bitcoinAddressRecord.type == SegwitAddresType.p2wsh) {
|
|
throw BitcoinTransactionSilentPaymentsNotSupported();
|
|
}
|
|
}
|
|
|
|
allInputsAmount += utx.value;
|
|
leftAmount = leftAmount - utx.value;
|
|
|
|
final address = RegexUtils.addressTypeFromStr(utx.address, network);
|
|
ECPrivate? privkey;
|
|
bool? isSilentPayment = false;
|
|
|
|
final hd =
|
|
utx.bitcoinAddressRecord.isHidden ? walletAddresses.sideHd : walletAddresses.mainHd;
|
|
|
|
if (utx.bitcoinAddressRecord is BitcoinSilentPaymentAddressRecord) {
|
|
final unspentAddress = utx.bitcoinAddressRecord as BitcoinSilentPaymentAddressRecord;
|
|
privkey = walletAddresses.silentAddress!.b_spend.tweakAdd(
|
|
BigintUtils.fromBytes(
|
|
BytesUtils.fromHexString(unspentAddress.silentPaymentTweak!),
|
|
),
|
|
);
|
|
spendsSilentPayment = true;
|
|
isSilentPayment = true;
|
|
} else if (!isHardwareWallet) {
|
|
privkey =
|
|
generateECPrivate(hd: hd, index: utx.bitcoinAddressRecord.index, network: network);
|
|
}
|
|
|
|
vinOutpoints.add(Outpoint(txid: utx.hash, index: utx.vout));
|
|
String pubKeyHex;
|
|
|
|
if (privkey != null) {
|
|
inputPrivKeyInfos.add(ECPrivateInfo(
|
|
privkey,
|
|
address.type == SegwitAddresType.p2tr,
|
|
tweak: !isSilentPayment,
|
|
));
|
|
|
|
pubKeyHex = privkey.getPublic().toHex();
|
|
} else {
|
|
pubKeyHex = hd.childKey(Bip32KeyIndex(utx.bitcoinAddressRecord.index)).publicKey.toHex();
|
|
}
|
|
|
|
final derivationPath =
|
|
"${_hardenedDerivationPath(walletInfo.derivationInfo?.derivationPath ?? electrum_path)}"
|
|
"/${utx.bitcoinAddressRecord.isHidden ? "1" : "0"}"
|
|
"/${utx.bitcoinAddressRecord.index}";
|
|
publicKeys[address.pubKeyHash()] = PublicKeyWithDerivationPath(pubKeyHex, derivationPath);
|
|
|
|
utxos.add(
|
|
UtxoWithAddress(
|
|
utxo: BitcoinUtxo(
|
|
txHash: utx.hash,
|
|
value: BigInt.from(utx.value),
|
|
vout: utx.vout,
|
|
scriptType: _getScriptType(address),
|
|
isSilentPayment: isSilentPayment,
|
|
),
|
|
ownerDetails: UtxoAddressDetails(
|
|
publicKey: pubKeyHex,
|
|
address: address,
|
|
),
|
|
),
|
|
);
|
|
|
|
// sendAll continues for all inputs
|
|
if (!sendAll) {
|
|
bool amountIsAcquired = leftAmount <= 0;
|
|
if ((inputsCount == null && amountIsAcquired) || inputsCount == i + 1) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (utxos.isEmpty) {
|
|
throw BitcoinTransactionNoInputsException();
|
|
}
|
|
|
|
return UtxoDetails(
|
|
availableInputs: availableInputs,
|
|
unconfirmedCoins: unconfirmedCoins,
|
|
utxos: utxos,
|
|
vinOutpoints: vinOutpoints,
|
|
inputPrivKeyInfos: inputPrivKeyInfos,
|
|
publicKeys: publicKeys,
|
|
allInputsAmount: allInputsAmount,
|
|
spendsSilentPayment: spendsSilentPayment,
|
|
spendsUnconfirmedTX: spendsUnconfirmedTX,
|
|
);
|
|
}
|
|
|
|
Future<EstimatedTxResult> estimateSendAllTx(
|
|
List<BitcoinOutput> outputs,
|
|
int feeRate, {
|
|
String? memo,
|
|
int credentialsAmount = 0,
|
|
bool hasSilentPayment = false,
|
|
}) async {
|
|
final utxoDetails = _createUTXOS(
|
|
sendAll: true,
|
|
credentialsAmount: credentialsAmount,
|
|
paysToSilentPayment: hasSilentPayment,
|
|
);
|
|
|
|
int fee = await calcFee(
|
|
utxos: utxoDetails.utxos,
|
|
outputs: outputs,
|
|
network: network,
|
|
memo: memo,
|
|
feeRate: feeRate,
|
|
inputPrivKeyInfos: utxoDetails.inputPrivKeyInfos,
|
|
vinOutpoints: utxoDetails.vinOutpoints,
|
|
);
|
|
|
|
if (fee == 0) {
|
|
throw BitcoinTransactionNoFeeException();
|
|
}
|
|
|
|
// 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
|
|
int amount = utxoDetails.allInputsAmount - fee;
|
|
|
|
if (amount <= 0) {
|
|
throw BitcoinTransactionWrongBalanceException(amount: utxoDetails.allInputsAmount + fee);
|
|
}
|
|
|
|
if (amount <= 0) {
|
|
throw BitcoinTransactionWrongBalanceException();
|
|
}
|
|
|
|
// Attempting to send less than the dust limit
|
|
if (_isBelowDust(amount)) {
|
|
throw BitcoinTransactionNoDustException();
|
|
}
|
|
|
|
if (credentialsAmount > 0) {
|
|
final amountLeftForFee = amount - credentialsAmount;
|
|
if (amountLeftForFee > 0 && _isBelowDust(amountLeftForFee)) {
|
|
amount -= amountLeftForFee;
|
|
fee += amountLeftForFee;
|
|
}
|
|
}
|
|
|
|
if (outputs.length == 1) {
|
|
outputs[0] = BitcoinOutput(address: outputs.last.address, value: BigInt.from(amount));
|
|
}
|
|
|
|
return EstimatedTxResult(
|
|
utxos: utxoDetails.utxos,
|
|
inputPrivKeyInfos: utxoDetails.inputPrivKeyInfos,
|
|
publicKeys: utxoDetails.publicKeys,
|
|
fee: fee,
|
|
amount: amount,
|
|
isSendAll: true,
|
|
hasChange: false,
|
|
memo: memo,
|
|
spendsUnconfirmedTX: utxoDetails.spendsUnconfirmedTX,
|
|
spendsSilentPayment: utxoDetails.spendsSilentPayment,
|
|
);
|
|
}
|
|
|
|
Future<EstimatedTxResult> estimateTxForAmount(
|
|
int credentialsAmount,
|
|
List<BitcoinOutput> outputs,
|
|
int feeRate, {
|
|
int? inputsCount,
|
|
String? memo,
|
|
bool? useUnconfirmed,
|
|
bool hasSilentPayment = false,
|
|
}) async {
|
|
final utxoDetails = _createUTXOS(
|
|
sendAll: false,
|
|
credentialsAmount: credentialsAmount,
|
|
inputsCount: inputsCount,
|
|
paysToSilentPayment: hasSilentPayment,
|
|
);
|
|
|
|
final spendingAllCoins = utxoDetails.availableInputs.length == utxoDetails.utxos.length;
|
|
final spendingAllConfirmedCoins = !utxoDetails.spendsUnconfirmedTX &&
|
|
utxoDetails.utxos.length ==
|
|
utxoDetails.availableInputs.length - utxoDetails.unconfirmedCoins.length;
|
|
|
|
// How much is being spent - how much is being sent
|
|
int amountLeftForChangeAndFee = utxoDetails.allInputsAmount - credentialsAmount;
|
|
|
|
if (amountLeftForChangeAndFee <= 0) {
|
|
if (!spendingAllCoins) {
|
|
return estimateTxForAmount(
|
|
credentialsAmount,
|
|
outputs,
|
|
feeRate,
|
|
inputsCount: utxoDetails.utxos.length + 1,
|
|
memo: memo,
|
|
hasSilentPayment: hasSilentPayment,
|
|
);
|
|
}
|
|
|
|
throw BitcoinTransactionWrongBalanceException();
|
|
}
|
|
|
|
final changeAddress = await walletAddresses.getChangeAddress(
|
|
outputs: outputs,
|
|
utxoDetails: utxoDetails,
|
|
);
|
|
final address = RegexUtils.addressTypeFromStr(changeAddress, network);
|
|
outputs.add(BitcoinOutput(
|
|
address: address,
|
|
value: BigInt.from(amountLeftForChangeAndFee),
|
|
isChange: true,
|
|
));
|
|
|
|
int fee = await calcFee(
|
|
utxos: utxoDetails.utxos,
|
|
outputs: outputs,
|
|
network: network,
|
|
memo: memo,
|
|
feeRate: feeRate,
|
|
);
|
|
|
|
if (fee == 0) {
|
|
throw BitcoinTransactionNoFeeException();
|
|
}
|
|
|
|
int amount = credentialsAmount;
|
|
final lastOutput = outputs.last;
|
|
final amountLeftForChange = amountLeftForChangeAndFee - fee;
|
|
|
|
print(amountLeftForChangeAndFee);
|
|
|
|
if (!_isBelowDust(amountLeftForChange)) {
|
|
// Here, lastOutput already is change, return the amount left without the fee to the user's address.
|
|
outputs[outputs.length - 1] = BitcoinOutput(
|
|
address: lastOutput.address,
|
|
value: BigInt.from(amountLeftForChange),
|
|
isSilentPayment: lastOutput.isSilentPayment,
|
|
isChange: true,
|
|
);
|
|
} else {
|
|
// If has change that is lower than dust, will end up with tx rejected by network rules, so estimate again without the added change
|
|
outputs.removeLast();
|
|
|
|
// Still has inputs to spend before failing
|
|
if (!spendingAllCoins) {
|
|
return estimateTxForAmount(
|
|
credentialsAmount,
|
|
outputs,
|
|
feeRate,
|
|
inputsCount: utxoDetails.utxos.length + 1,
|
|
memo: memo,
|
|
useUnconfirmed: useUnconfirmed ?? spendingAllConfirmedCoins,
|
|
);
|
|
}
|
|
|
|
final estimatedSendAll = await estimateSendAllTx(
|
|
outputs,
|
|
feeRate,
|
|
memo: memo,
|
|
);
|
|
|
|
if (estimatedSendAll.amount == credentialsAmount) {
|
|
return estimatedSendAll;
|
|
}
|
|
|
|
// Estimate to user how much is needed to send to cover the fee
|
|
final maxAmountWithReturningChange = utxoDetails.allInputsAmount - _dustAmount - fee - 1;
|
|
throw BitcoinTransactionNoDustOnChangeException(
|
|
bitcoinAmountToString(amount: maxAmountWithReturningChange),
|
|
bitcoinAmountToString(amount: estimatedSendAll.amount),
|
|
);
|
|
}
|
|
|
|
// Attempting to send less than the dust limit
|
|
if (_isBelowDust(amount)) {
|
|
throw BitcoinTransactionNoDustException();
|
|
}
|
|
|
|
final totalAmount = amount + fee;
|
|
|
|
if (totalAmount > (balance[currency]!.confirmed + balance[currency]!.secondConfirmed)) {
|
|
throw BitcoinTransactionWrongBalanceException();
|
|
}
|
|
|
|
if (totalAmount > utxoDetails.allInputsAmount) {
|
|
if (spendingAllCoins) {
|
|
throw BitcoinTransactionWrongBalanceException();
|
|
} else {
|
|
outputs.removeLast();
|
|
return estimateTxForAmount(
|
|
credentialsAmount,
|
|
outputs,
|
|
feeRate,
|
|
inputsCount: utxoDetails.utxos.length + 1,
|
|
memo: memo,
|
|
useUnconfirmed: useUnconfirmed ?? spendingAllConfirmedCoins,
|
|
hasSilentPayment: hasSilentPayment,
|
|
);
|
|
}
|
|
}
|
|
|
|
return EstimatedTxResult(
|
|
utxos: utxoDetails.utxos,
|
|
inputPrivKeyInfos: utxoDetails.inputPrivKeyInfos,
|
|
publicKeys: utxoDetails.publicKeys,
|
|
fee: fee,
|
|
amount: amount,
|
|
hasChange: true,
|
|
isSendAll: false,
|
|
memo: memo,
|
|
spendsUnconfirmedTX: utxoDetails.spendsUnconfirmedTX,
|
|
spendsSilentPayment: utxoDetails.spendsSilentPayment,
|
|
);
|
|
}
|
|
|
|
Future<int> calcFee({
|
|
required List<UtxoWithAddress> utxos,
|
|
required List<BitcoinBaseOutput> outputs,
|
|
required BasedUtxoNetwork network,
|
|
String? memo,
|
|
required int feeRate,
|
|
List<ECPrivateInfo>? inputPrivKeyInfos,
|
|
List<Outpoint>? vinOutpoints,
|
|
}) async {
|
|
int estimatedSize;
|
|
if (network is BitcoinCashNetwork) {
|
|
estimatedSize = ForkedTransactionBuilder.estimateTransactionSize(
|
|
utxos: utxos,
|
|
outputs: outputs,
|
|
network: network,
|
|
memo: memo,
|
|
);
|
|
} else {
|
|
estimatedSize = BitcoinTransactionBuilder.estimateTransactionSize(
|
|
utxos: utxos,
|
|
outputs: outputs,
|
|
network: network,
|
|
memo: memo,
|
|
inputPrivKeyInfos: inputPrivKeyInfos,
|
|
vinOutpoints: vinOutpoints,
|
|
);
|
|
}
|
|
|
|
return feeAmountWithFeeRate(feeRate, 0, 0, size: estimatedSize);
|
|
}
|
|
|
|
@override
|
|
Future<PendingTransaction> createTransaction(Object credentials) async {
|
|
try {
|
|
final outputs = <BitcoinOutput>[];
|
|
final transactionCredentials = credentials as BitcoinTransactionCredentials;
|
|
final hasMultiDestination = transactionCredentials.outputs.length > 1;
|
|
final sendAll = !hasMultiDestination && transactionCredentials.outputs.first.sendAll;
|
|
final memo = transactionCredentials.outputs.first.memo;
|
|
|
|
int credentialsAmount = 0;
|
|
bool hasSilentPayment = false;
|
|
|
|
for (final out in transactionCredentials.outputs) {
|
|
final outputAmount = out.formattedCryptoAmount!;
|
|
|
|
if (!sendAll && _isBelowDust(outputAmount)) {
|
|
throw BitcoinTransactionNoDustException();
|
|
}
|
|
|
|
if (hasMultiDestination) {
|
|
if (out.sendAll) {
|
|
throw BitcoinTransactionWrongBalanceException();
|
|
}
|
|
}
|
|
|
|
credentialsAmount += outputAmount;
|
|
|
|
final address = RegexUtils.addressTypeFromStr(
|
|
out.isParsedAddress ? out.extractedAddress! : out.address, network);
|
|
final isSilentPayment = address is SilentPaymentAddress;
|
|
|
|
if (isSilentPayment) {
|
|
hasSilentPayment = true;
|
|
}
|
|
|
|
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),
|
|
isSilentPayment: isSilentPayment,
|
|
));
|
|
} else {
|
|
outputs.add(BitcoinOutput(
|
|
address: address,
|
|
value: BigInt.from(outputAmount),
|
|
isSilentPayment: isSilentPayment,
|
|
));
|
|
}
|
|
}
|
|
|
|
final feeRateInt = transactionCredentials.feeRate != null
|
|
? transactionCredentials.feeRate!
|
|
: feeRate(transactionCredentials.priority!);
|
|
|
|
EstimatedTxResult estimatedTx;
|
|
if (sendAll) {
|
|
estimatedTx = await estimateSendAllTx(
|
|
outputs,
|
|
feeRateInt,
|
|
memo: memo,
|
|
credentialsAmount: credentialsAmount,
|
|
hasSilentPayment: hasSilentPayment,
|
|
);
|
|
} else {
|
|
estimatedTx = await estimateTxForAmount(
|
|
credentialsAmount,
|
|
outputs,
|
|
feeRateInt,
|
|
memo: memo,
|
|
hasSilentPayment: hasSilentPayment,
|
|
);
|
|
}
|
|
|
|
if (walletInfo.isHardwareWallet) {
|
|
final transaction = await buildHardwareWalletTransaction(
|
|
utxos: estimatedTx.utxos,
|
|
outputs: outputs,
|
|
publicKeys: estimatedTx.publicKeys,
|
|
fee: BigInt.from(estimatedTx.fee),
|
|
network: network,
|
|
memo: estimatedTx.memo,
|
|
outputOrdering: BitcoinOrdering.none,
|
|
enableRBF: true,
|
|
);
|
|
|
|
return PendingBitcoinTransaction(
|
|
transaction,
|
|
type,
|
|
electrumClient: electrumClient,
|
|
amount: estimatedTx.amount,
|
|
fee: estimatedTx.fee,
|
|
feeRate: feeRateInt.toString(),
|
|
network: network,
|
|
hasChange: estimatedTx.hasChange,
|
|
isSendAll: estimatedTx.isSendAll,
|
|
hasTaprootInputs: false, // ToDo: (Konsti) Support Taproot
|
|
)..addListener((transaction) async {
|
|
transactionHistory.addOne(transaction);
|
|
await updateBalance();
|
|
});
|
|
}
|
|
|
|
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) {
|
|
String error = "Cannot find private key.";
|
|
|
|
ECPrivateInfo? key;
|
|
|
|
if (estimatedTx.inputPrivKeyInfos.isEmpty) {
|
|
error += "\nNo private keys generated.";
|
|
} else {
|
|
error += "\nAddress: ${utxo.ownerDetails.address.toAddress(network)}";
|
|
|
|
key = estimatedTx.inputPrivKeyInfos.firstWhereOrNull((element) {
|
|
final elemPubkey = element.privkey.getPublic().toHex();
|
|
if (elemPubkey == publicKey) {
|
|
return true;
|
|
} else {
|
|
error += "\nExpected: $publicKey";
|
|
error += "\nPubkey: $elemPubkey";
|
|
return false;
|
|
}
|
|
});
|
|
}
|
|
|
|
if (key == null) {
|
|
throw Exception(error);
|
|
}
|
|
|
|
if (utxo.utxo.isP2tr()) {
|
|
hasTaprootInputs = true;
|
|
return key.privkey.signTapRoot(
|
|
txDigest,
|
|
sighash: sighash,
|
|
tweak: utxo.utxo.isSilentPayment != true,
|
|
);
|
|
} else {
|
|
return key.privkey.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);
|
|
if (estimatedTx.spendsSilentPayment) {
|
|
transactionHistory.transactions.values.forEach((tx) {
|
|
tx.unspents?.removeWhere(
|
|
(unspent) => estimatedTx.utxos.any((e) => e.utxo.txHash == unspent.hash));
|
|
transactionHistory.addOne(tx);
|
|
});
|
|
}
|
|
|
|
unspentCoins
|
|
.removeWhere((utxo) => estimatedTx.utxos.any((e) => e.utxo.txHash == utxo.hash));
|
|
|
|
await updateBalance();
|
|
});
|
|
} catch (e) {
|
|
throw e;
|
|
}
|
|
}
|
|
|
|
Future<BtcTransaction> buildHardwareWalletTransaction({
|
|
required List<BitcoinBaseOutput> outputs,
|
|
required BigInt fee,
|
|
required BasedUtxoNetwork network,
|
|
required List<UtxoWithAddress> utxos,
|
|
required Map<String, PublicKeyWithDerivationPath> publicKeys,
|
|
String? memo,
|
|
bool enableRBF = false,
|
|
BitcoinOrdering inputOrdering = BitcoinOrdering.bip69,
|
|
BitcoinOrdering outputOrdering = BitcoinOrdering.bip69,
|
|
}) async =>
|
|
throw UnimplementedError();
|
|
|
|
String toJSON() => json.encode({
|
|
'mnemonic': _mnemonic,
|
|
'xpub': xpub,
|
|
'passphrase': passphrase ?? '',
|
|
'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(),
|
|
'derivationTypeIndex': walletInfo.derivationInfo?.derivationType?.index,
|
|
'derivationPath': walletInfo.derivationInfo?.derivationPath,
|
|
'silent_addresses': walletAddresses.silentAddresses.map((addr) => addr.toJSON()).toList(),
|
|
'silent_address_index': walletAddresses.currentSilentAddressIndex.toString(),
|
|
'mweb_addresses': walletAddresses.mwebAddresses.map((addr) => addr.toJSON()).toList(),
|
|
});
|
|
|
|
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 {
|
|
if (!(await WalletKeysFile.hasKeysFile(walletInfo.name, walletInfo.type))) {
|
|
await saveKeysFile(_password, encryptionFileUtils);
|
|
saveKeysFile(_password, encryptionFileUtils, true);
|
|
}
|
|
|
|
final path = await makePath();
|
|
await encryptionFileUtils.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);
|
|
}
|
|
|
|
@action
|
|
@override
|
|
Future<void> rescan({required int height, bool? doSingleScan}) async {
|
|
silentPaymentsScanningActive = true;
|
|
_setListeners(height, doSingleScan: doSingleScan);
|
|
}
|
|
|
|
@override
|
|
Future<void> close() async {
|
|
try {
|
|
await _receiveStream?.cancel();
|
|
await electrumClient.close();
|
|
} catch (_) {}
|
|
_autoSaveTimer?.cancel();
|
|
_updateFeeRateTimer?.cancel();
|
|
}
|
|
|
|
@action
|
|
Future<void> updateAllUnspents() async {
|
|
List<BitcoinUnspent> updatedUnspentCoins = [];
|
|
|
|
if (hasSilentPaymentsScanning) {
|
|
// Update unspents stored from scanned silent payment transactions
|
|
transactionHistory.transactions.values.forEach((tx) {
|
|
if (tx.unspents != null) {
|
|
updatedUnspentCoins.addAll(tx.unspents!);
|
|
}
|
|
});
|
|
}
|
|
|
|
await Future.wait(walletAddresses.allAddresses.map((address) async {
|
|
updatedUnspentCoins.addAll(await fetchUnspent(address));
|
|
}));
|
|
|
|
unspentCoins = updatedUnspentCoins;
|
|
|
|
if (unspentCoinsInfo.length != updatedUnspentCoins.length) {
|
|
unspentCoins.forEach((coin) => addCoinInfo(coin));
|
|
return;
|
|
}
|
|
|
|
await updateCoins(unspentCoins);
|
|
await _refreshUnspentCoinsInfo();
|
|
}
|
|
|
|
Future<void> updateCoins(List<BitcoinUnspent> newUnspentCoins) async {
|
|
if (newUnspentCoins.isEmpty) {
|
|
return;
|
|
}
|
|
|
|
newUnspentCoins.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;
|
|
if (coin.bitcoinAddressRecord is! BitcoinSilentPaymentAddressRecord)
|
|
coin.bitcoinAddressRecord.balance += coinInfo.value;
|
|
} else {
|
|
addCoinInfo(coin);
|
|
}
|
|
});
|
|
}
|
|
|
|
@action
|
|
Future<void> updateUnspentsForAddress(BitcoinAddressRecord address) async {
|
|
final newUnspentCoins = await fetchUnspent(address);
|
|
await updateCoins(newUnspentCoins);
|
|
}
|
|
|
|
@action
|
|
Future<List<BitcoinUnspent>> fetchUnspent(BitcoinAddressRecord address) async {
|
|
List<Map<String, dynamic>> unspents = [];
|
|
List<BitcoinUnspent> updatedUnspentCoins = [];
|
|
|
|
try {
|
|
unspents = await electrumClient.getListUnspent(address.getScriptHash(network));
|
|
} catch (e, s) {
|
|
print(e);
|
|
print(s);
|
|
return [];
|
|
}
|
|
|
|
await Future.wait(unspents.map((unspent) async {
|
|
try {
|
|
final coin = BitcoinUnspent.fromJSON(address, unspent);
|
|
final tx = await fetchTransactionInfo(hash: coin.hash);
|
|
coin.isChange = address.isHidden;
|
|
coin.confirmations = tx?.confirmations;
|
|
|
|
updatedUnspentCoins.add(coin);
|
|
} catch (_) {}
|
|
}));
|
|
|
|
return updatedUnspentCoins;
|
|
}
|
|
|
|
@action
|
|
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,
|
|
isSilentPayment: coin is BitcoinSilentPaymentsUnspent,
|
|
);
|
|
|
|
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(ElectrumTransactionInfo tx) async {
|
|
try {
|
|
final bundle = await getTransactionExpanded(hash: tx.txHash);
|
|
_updateInputsAndOutputs(tx, bundle);
|
|
if (bundle.confirmations > 0) return false;
|
|
return bundle.originalTransaction.canReplaceByFee;
|
|
} catch (e) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
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;
|
|
String? memo;
|
|
|
|
// 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 = RegexUtils.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),
|
|
),
|
|
);
|
|
}
|
|
|
|
// Create a list of available outputs
|
|
final outputs = <BitcoinOutput>[];
|
|
for (final out in bundle.originalTransaction.outputs) {
|
|
// Check if the script contains OP_RETURN
|
|
final script = out.scriptPubKey.script;
|
|
if (script.contains('OP_RETURN') && memo == null) {
|
|
final index = script.indexOf('OP_RETURN');
|
|
if (index + 1 <= script.length) {
|
|
try {
|
|
final opReturnData = script[index + 1].toString();
|
|
memo = utf8.decode(HEX.decode(opReturnData));
|
|
continue;
|
|
} catch (_) {
|
|
throw Exception('Cannot decode OP_RETURN data');
|
|
}
|
|
}
|
|
}
|
|
|
|
final address = addressFromOutputScript(out.scriptPubKey, network);
|
|
final btcAddress = RegexUtils.addressTypeFromStr(address, network);
|
|
outputs.add(BitcoinOutput(address: btcAddress, value: BigInt.from(out.amount.toInt())));
|
|
}
|
|
|
|
// Calculate the total amount and fees
|
|
int totalOutAmount =
|
|
outputs.fold<int>(0, (previousValue, output) => previousValue + output.value.toInt());
|
|
int currentFee = allInputsAmount - totalOutAmount;
|
|
int remainingFee = newFee - currentFee;
|
|
|
|
if (remainingFee <= 0) {
|
|
throw Exception("New fee must be higher than the current fee.");
|
|
}
|
|
|
|
// Deduct Remaining Fee from Main Outputs
|
|
if (remainingFee > 0) {
|
|
for (int i = outputs.length - 1; i >= 0; i--) {
|
|
int outputAmount = outputs[i].value.toInt();
|
|
|
|
if (outputAmount > _dustAmount) {
|
|
int deduction = (outputAmount - _dustAmount >= remainingFee)
|
|
? remainingFee
|
|
: outputAmount - _dustAmount;
|
|
outputs[i] = BitcoinOutput(
|
|
address: outputs[i].address, value: BigInt.from(outputAmount - deduction));
|
|
remainingFee -= deduction;
|
|
|
|
if (remainingFee <= 0) break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Final check if the remaining fee couldn't be deducted
|
|
if (remainingFee > 0) {
|
|
throw Exception("Not enough funds to cover the fee.");
|
|
}
|
|
|
|
// Identify all change outputs
|
|
final changeAddresses = walletAddresses.allAddresses.where((element) => element.isHidden);
|
|
final List<BitcoinOutput> changeOutputs = outputs
|
|
.where((output) => changeAddresses
|
|
.any((element) => element.address == output.address.toAddress(network)))
|
|
.toList();
|
|
|
|
int totalChangeAmount =
|
|
changeOutputs.fold<int>(0, (sum, output) => sum + output.value.toInt());
|
|
|
|
// The final amount that the receiver will receive
|
|
int sendingAmount = allInputsAmount - newFee - totalChangeAmount;
|
|
|
|
final txb = BitcoinTransactionBuilder(
|
|
utxos: utxos,
|
|
outputs: outputs,
|
|
fee: BigInt.from(newFee),
|
|
network: network,
|
|
memo: memo,
|
|
outputOrdering: BitcoinOrdering.none,
|
|
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: sendingAmount,
|
|
fee: newFee,
|
|
network: network,
|
|
hasChange: changeOutputs.isNotEmpty,
|
|
feeRate: newFee.toString(),
|
|
)..addListener((transaction) async {
|
|
transactionHistory.addOne(transaction);
|
|
await updateBalance();
|
|
});
|
|
} catch (e) {
|
|
throw e;
|
|
}
|
|
}
|
|
|
|
Future<ElectrumTransactionBundle> getTransactionExpanded(
|
|
{required String hash, int? height}) async {
|
|
String transactionHex;
|
|
int? time;
|
|
int? confirmations;
|
|
|
|
final verboseTransaction = await electrumClient.getTransactionVerbose(hash: hash);
|
|
|
|
if (verboseTransaction.isEmpty) {
|
|
transactionHex = await electrumClient.getTransactionHex(hash: hash);
|
|
|
|
if (height != null && await checkIfMempoolAPIIsEnabled()) {
|
|
final blockHash = await http.get(
|
|
Uri.parse(
|
|
"http://mempool.cakewallet.com:8999/api/v1/block-height/$height",
|
|
),
|
|
);
|
|
|
|
if (blockHash.statusCode == 200 &&
|
|
blockHash.body.isNotEmpty &&
|
|
jsonDecode(blockHash.body) != null) {
|
|
final blockResponse = await http.get(
|
|
Uri.parse(
|
|
"http://mempool.cakewallet.com:8999/api/v1/block/${blockHash.body}",
|
|
),
|
|
);
|
|
if (blockResponse.statusCode == 200 &&
|
|
blockResponse.body.isNotEmpty &&
|
|
jsonDecode(blockResponse.body)['timestamp'] != null) {
|
|
time = int.parse(jsonDecode(blockResponse.body)['timestamp'].toString());
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
transactionHex = verboseTransaction['hex'] as String;
|
|
time = verboseTransaction['time'] as int?;
|
|
confirmations = verboseTransaction['confirmations'] as int?;
|
|
}
|
|
|
|
if (height != null) {
|
|
if (time == null && height > 0) {
|
|
time = (getDateByBitcoinHeight(height).millisecondsSinceEpoch / 1000).round();
|
|
}
|
|
|
|
if (confirmations == null) {
|
|
final tip = await getUpdatedChainTip();
|
|
if (tip > 0 && height > 0) {
|
|
// Add one because the block itself is the first confirmation
|
|
confirmations = tip - height + 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
final original = BtcTransaction.fromRaw(transactionHex);
|
|
final ins = <BtcTransaction>[];
|
|
|
|
for (final vin in original.inputs) {
|
|
final verboseTransaction = await electrumClient.getTransactionVerbose(hash: vin.txId);
|
|
|
|
final String inputTransactionHex;
|
|
|
|
if (verboseTransaction.isEmpty) {
|
|
inputTransactionHex = await electrumClient.getTransactionHex(hash: hash);
|
|
} else {
|
|
inputTransactionHex = verboseTransaction['hex'] as String;
|
|
}
|
|
|
|
ins.add(BtcTransaction.fromRaw(inputTransactionHex));
|
|
}
|
|
|
|
return ElectrumTransactionBundle(
|
|
original,
|
|
ins: ins,
|
|
time: time,
|
|
confirmations: confirmations ?? 0,
|
|
);
|
|
}
|
|
|
|
Future<ElectrumTransactionInfo?> fetchTransactionInfo(
|
|
{required String hash, int? height, bool? retryOnFailure}) async {
|
|
try {
|
|
return ElectrumTransactionInfo.fromElectrumBundle(
|
|
await getTransactionExpanded(hash: hash, height: height),
|
|
walletInfo.type,
|
|
network,
|
|
addresses: addressesSet,
|
|
height: height,
|
|
);
|
|
} catch (e) {
|
|
if (e is FormatException && retryOnFailure == true) {
|
|
await Future.delayed(const Duration(seconds: 2));
|
|
return fetchTransactionInfo(hash: hash, height: height);
|
|
}
|
|
return null;
|
|
}
|
|
}
|
|
|
|
@override
|
|
Future<Map<String, ElectrumTransactionInfo>> fetchTransactions() async {
|
|
try {
|
|
final Map<String, ElectrumTransactionInfo> historiesWithDetails = {};
|
|
|
|
if (type == WalletType.bitcoin) {
|
|
await Future.wait(BITCOIN_ADDRESS_TYPES
|
|
.map((type) => fetchTransactionsForAddressType(historiesWithDetails, type)));
|
|
} else if (type == WalletType.bitcoinCash) {
|
|
await Future.wait(BITCOIN_CASH_ADDRESS_TYPES
|
|
.map((type) => fetchTransactionsForAddressType(historiesWithDetails, type)));
|
|
} else if (type == WalletType.litecoin) {
|
|
await Future.wait(LITECOIN_ADDRESS_TYPES
|
|
.map((type) => fetchTransactionsForAddressType(historiesWithDetails, type)));
|
|
}
|
|
|
|
transactionHistory.transactions.values.forEach((tx) async {
|
|
final isPendingSilentPaymentUtxo =
|
|
(tx.isPending || tx.confirmations == 0) && historiesWithDetails[tx.id] == null;
|
|
|
|
if (isPendingSilentPaymentUtxo) {
|
|
final info =
|
|
await fetchTransactionInfo(hash: tx.id, height: tx.height, retryOnFailure: true);
|
|
|
|
if (info != null) {
|
|
tx.confirmations = info.confirmations;
|
|
tx.isPending = tx.confirmations == 0;
|
|
transactionHistory.addOne(tx);
|
|
await transactionHistory.save();
|
|
}
|
|
}
|
|
});
|
|
|
|
return historiesWithDetails;
|
|
} catch (e) {
|
|
print(e.toString());
|
|
return {};
|
|
}
|
|
}
|
|
|
|
Future<void> fetchTransactionsForAddressType(
|
|
Map<String, ElectrumTransactionInfo> historiesWithDetails,
|
|
BitcoinAddressType type,
|
|
) async {
|
|
final addressesByType = walletAddresses.allAddresses.where((addr) => addr.type == type);
|
|
final hiddenAddresses = addressesByType.where((addr) => addr.isHidden == true);
|
|
final receiveAddresses = addressesByType.where((addr) => addr.isHidden == false);
|
|
|
|
await Future.wait(addressesByType.map((addressRecord) async {
|
|
final history = await _fetchAddressHistory(addressRecord, await getCurrentChainTip());
|
|
|
|
if (history.isNotEmpty) {
|
|
addressRecord.txCount = history.length;
|
|
historiesWithDetails.addAll(history);
|
|
|
|
final matchedAddresses = addressRecord.isHidden ? hiddenAddresses : receiveAddresses;
|
|
final isUsedAddressUnderGap = matchedAddresses.toList().indexOf(addressRecord) >=
|
|
matchedAddresses.length -
|
|
(addressRecord.isHidden
|
|
? ElectrumWalletAddressesBase.defaultChangeAddressesCount
|
|
: ElectrumWalletAddressesBase.defaultReceiveAddressesCount);
|
|
|
|
if (isUsedAddressUnderGap) {
|
|
final prevLength = walletAddresses.allAddresses.length;
|
|
|
|
// Discover new addresses for the same address type until the gap limit is respected
|
|
await walletAddresses.discoverAddresses(
|
|
matchedAddresses.toList(),
|
|
addressRecord.isHidden,
|
|
(address) async {
|
|
await subscribeForUpdates();
|
|
return _fetchAddressHistory(address, await getCurrentChainTip())
|
|
.then((history) => history.isNotEmpty ? address.address : null);
|
|
},
|
|
type: type,
|
|
);
|
|
|
|
final newLength = walletAddresses.allAddresses.length;
|
|
|
|
if (newLength > prevLength) {
|
|
await fetchTransactionsForAddressType(historiesWithDetails, type);
|
|
}
|
|
}
|
|
}
|
|
}));
|
|
}
|
|
|
|
Future<Map<String, ElectrumTransactionInfo>> _fetchAddressHistory(
|
|
BitcoinAddressRecord addressRecord, int? currentHeight) async {
|
|
try {
|
|
final Map<String, ElectrumTransactionInfo> historiesWithDetails = {};
|
|
|
|
final history = await electrumClient.getHistory(addressRecord.getScriptHash(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
|
|
if (currentHeight != null) storedTx.confirmations = currentHeight - height + 1;
|
|
storedTx.isPending = storedTx.confirmations == 0;
|
|
}
|
|
|
|
historiesWithDetails[txid] = storedTx;
|
|
} else {
|
|
final tx = await fetchTransactionInfo(hash: txid, height: height, 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;
|
|
}
|
|
await getCurrentChainTip();
|
|
|
|
transactionHistory.transactions.values.forEach((tx) async {
|
|
if (tx.unspents != null && tx.unspents!.isNotEmpty && tx.height != null && tx.height! > 0) {
|
|
tx.confirmations = await getCurrentChainTip() - tx.height! + 1;
|
|
}
|
|
});
|
|
|
|
_isTransactionUpdating = true;
|
|
await fetchTransactions();
|
|
walletAddresses.updateReceiveAddresses();
|
|
_isTransactionUpdating = false;
|
|
} catch (e, stacktrace) {
|
|
print(stacktrace);
|
|
print(e);
|
|
_isTransactionUpdating = false;
|
|
}
|
|
}
|
|
|
|
Future<void> subscribeForUpdates() async {
|
|
final unsubscribedScriptHashes = walletAddresses.allAddresses.where(
|
|
(address) => !_scripthashesUpdateSubject.containsKey(address.getScriptHash(network)),
|
|
);
|
|
|
|
await Future.wait(unsubscribedScriptHashes.map((address) async {
|
|
final sh = address.getScriptHash(network);
|
|
await _scripthashesUpdateSubject[sh]?.close();
|
|
_scripthashesUpdateSubject[sh] = await electrumClient.scripthashUpdate(sh);
|
|
_scripthashesUpdateSubject[sh]?.listen((event) async {
|
|
try {
|
|
await updateUnspentsForAddress(address);
|
|
|
|
await updateBalance();
|
|
|
|
await _fetchAddressHistory(address, await getCurrentChainTip());
|
|
} 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
|
|
.where((address) => RegexUtils.addressTypeFromStr(address.address, network) is! MwebAddress)
|
|
.toList();
|
|
final balanceFutures = <Future<Map<String, dynamic>>>[];
|
|
for (var i = 0; i < addresses.length; i++) {
|
|
final addressRecord = addresses[i];
|
|
final sh = addressRecord.getScriptHash(network);
|
|
final balanceFuture = electrumClient.getBalance(sh);
|
|
balanceFutures.add(balanceFuture);
|
|
}
|
|
|
|
var totalFrozen = 0;
|
|
var totalConfirmed = 0;
|
|
var totalUnconfirmed = 0;
|
|
|
|
if (hasSilentPaymentsScanning) {
|
|
// Add values from unspent coins that are not fetched by the address list
|
|
// i.e. scanned silent payments
|
|
transactionHistory.transactions.values.forEach((tx) {
|
|
if (tx.unspents != null) {
|
|
tx.unspents!.forEach((unspent) {
|
|
if (unspent.bitcoinAddressRecord is BitcoinSilentPaymentAddressRecord) {
|
|
if (unspent.isFrozen) totalFrozen += unspent.value;
|
|
totalConfirmed += unspent.value;
|
|
}
|
|
});
|
|
}
|
|
});
|
|
}
|
|
|
|
final balances = await Future.wait(balanceFutures);
|
|
|
|
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;
|
|
|
|
addressRecord.balance = confirmed + 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();
|
|
}
|
|
|
|
@override
|
|
void setExceptionHandler(void Function(FlutterErrorDetails) onError) => _onError = onError;
|
|
|
|
@override
|
|
Future<String> signMessage(String message, {String? address = null}) async {
|
|
final index = address != null
|
|
? walletAddresses.allAddresses.firstWhere((element) => element.address == address).index
|
|
: null;
|
|
final HD = index == null ? hd : hd.childKey(Bip32KeyIndex(index));
|
|
final priv = ECPrivate.fromHex(HD.privateKey.privKey.toHex());
|
|
|
|
String messagePrefix = '\x18Bitcoin Signed Message:\n';
|
|
final hexEncoded = priv.signMessage(utf8.encode(message), messagePrefix: messagePrefix);
|
|
final decodedSig = hex.decode(hexEncoded);
|
|
return base64Encode(decodedSig);
|
|
}
|
|
|
|
@override
|
|
Future<bool> verifyMessage(String message, String signature, {String? address = null}) async {
|
|
if (address == null) {
|
|
return false;
|
|
}
|
|
|
|
List<int> sigDecodedBytes = [];
|
|
|
|
if (signature.endsWith('=')) {
|
|
sigDecodedBytes = base64.decode(signature);
|
|
} else {
|
|
sigDecodedBytes = hex.decode(signature);
|
|
}
|
|
|
|
if (sigDecodedBytes.length != 64 && sigDecodedBytes.length != 65) {
|
|
throw ArgumentException(
|
|
"signature must be 64 bytes without recover-id or 65 bytes with recover-id");
|
|
}
|
|
|
|
String messagePrefix = '\x18Bitcoin Signed Message:\n';
|
|
final messageHash = QuickCrypto.sha256Hash(
|
|
BitcoinSignerUtils.magicMessage(utf8.encode(message), messagePrefix));
|
|
|
|
List<int> correctSignature =
|
|
sigDecodedBytes.length == 65 ? sigDecodedBytes.sublist(1) : List.from(sigDecodedBytes);
|
|
List<int> rBytes = correctSignature.sublist(0, 32);
|
|
List<int> sBytes = correctSignature.sublist(32);
|
|
final sig = ECDSASignature(BigintUtils.fromBytes(rBytes), BigintUtils.fromBytes(sBytes));
|
|
|
|
List<int> possibleRecoverIds = [0, 1];
|
|
|
|
final baseAddress = RegexUtils.addressTypeFromStr(address, network);
|
|
|
|
for (int recoveryId in possibleRecoverIds) {
|
|
final pubKey = sig.recoverPublicKey(messageHash, Curves.generatorSecp256k1, recoveryId);
|
|
|
|
final recoveredPub = ECPublic.fromBytes(pubKey!.toBytes());
|
|
|
|
String? recoveredAddress;
|
|
|
|
if (baseAddress is P2pkAddress) {
|
|
recoveredAddress = recoveredPub.toP2pkAddress().toAddress(network);
|
|
} else if (baseAddress is P2pkhAddress) {
|
|
recoveredAddress = recoveredPub.toP2pkhAddress().toAddress(network);
|
|
} else if (baseAddress is P2wshAddress) {
|
|
recoveredAddress = recoveredPub.toP2wshAddress().toAddress(network);
|
|
} else if (baseAddress is P2wpkhAddress) {
|
|
recoveredAddress = recoveredPub.toP2wpkhAddress().toAddress(network);
|
|
}
|
|
|
|
if (recoveredAddress == address) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
Future<void> _setInitialHeight() async {
|
|
if (_chainTipUpdateSubject != null) return;
|
|
|
|
_currentChainTip = await getUpdatedChainTip();
|
|
|
|
if ((_currentChainTip == null || _currentChainTip! == 0) && walletInfo.restoreHeight == 0) {
|
|
await walletInfo.updateRestoreHeight(_currentChainTip!);
|
|
}
|
|
|
|
_chainTipUpdateSubject = electrumClient.chainTipSubscribe();
|
|
_chainTipUpdateSubject?.listen((e) async {
|
|
final event = e as Map<String, dynamic>;
|
|
final height = int.tryParse(event['height'].toString());
|
|
|
|
if (height != null) {
|
|
_currentChainTip = height;
|
|
|
|
if (alwaysScan == true && syncStatus is SyncedSyncStatus) {
|
|
_setListeners(walletInfo.restoreHeight);
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
static String _hardenedDerivationPath(String derivationPath) =>
|
|
derivationPath.substring(0, derivationPath.lastIndexOf("'") + 1);
|
|
|
|
@action
|
|
void _onConnectionStatusChange(ConnectionStatus status) {
|
|
switch (status) {
|
|
case ConnectionStatus.connected:
|
|
if (syncStatus is NotConnectedSyncStatus ||
|
|
syncStatus is LostConnectionSyncStatus ||
|
|
syncStatus is ConnectingSyncStatus) {
|
|
syncStatus = AttemptingSyncStatus();
|
|
startSync();
|
|
}
|
|
|
|
break;
|
|
case ConnectionStatus.disconnected:
|
|
syncStatus = NotConnectedSyncStatus();
|
|
break;
|
|
case ConnectionStatus.failed:
|
|
syncStatus = LostConnectionSyncStatus();
|
|
break;
|
|
case ConnectionStatus.connecting:
|
|
syncStatus = ConnectingSyncStatus();
|
|
break;
|
|
default:
|
|
}
|
|
}
|
|
|
|
void _syncStatusReaction(SyncStatus syncStatus) async {
|
|
if (syncStatus is SyncingSyncStatus) {
|
|
return;
|
|
}
|
|
|
|
if (syncStatus is NotConnectedSyncStatus || syncStatus is LostConnectionSyncStatus) {
|
|
// Needs to re-subscribe to all scripthashes when reconnected
|
|
_scripthashesUpdateSubject = {};
|
|
|
|
if (_isTryingToConnect) return;
|
|
|
|
_isTryingToConnect = true;
|
|
|
|
Timer(Duration(seconds: 5), () {
|
|
if (this.syncStatus is NotConnectedSyncStatus ||
|
|
this.syncStatus is LostConnectionSyncStatus) {
|
|
this.electrumClient.connectToUri(
|
|
node!.uri,
|
|
useSSL: node!.useSSL ?? false,
|
|
);
|
|
}
|
|
_isTryingToConnect = false;
|
|
});
|
|
}
|
|
|
|
// Message is shown on the UI for 3 seconds, revert to synced
|
|
if (syncStatus is SyncedTipSyncStatus) {
|
|
Timer(Duration(seconds: 3), () {
|
|
if (this.syncStatus is SyncedTipSyncStatus) this.syncStatus = SyncedSyncStatus();
|
|
});
|
|
}
|
|
}
|
|
|
|
void _updateInputsAndOutputs(ElectrumTransactionInfo tx, ElectrumTransactionBundle bundle) {
|
|
tx.inputAddresses = tx.inputAddresses?.where((address) => address.isNotEmpty).toList();
|
|
|
|
if (tx.inputAddresses == null ||
|
|
tx.inputAddresses!.isEmpty ||
|
|
tx.outputAddresses == null ||
|
|
tx.outputAddresses!.isEmpty) {
|
|
List<String> inputAddresses = [];
|
|
List<String> outputAddresses = [];
|
|
|
|
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];
|
|
final address = addressFromOutputScript(outTransaction.scriptPubKey, network);
|
|
|
|
if (address.isNotEmpty) inputAddresses.add(address);
|
|
}
|
|
|
|
for (int i = 0; i < bundle.originalTransaction.outputs.length; i++) {
|
|
final out = bundle.originalTransaction.outputs[i];
|
|
final address = addressFromOutputScript(out.scriptPubKey, network);
|
|
|
|
if (address.isNotEmpty) outputAddresses.add(address);
|
|
|
|
// Check if the script contains OP_RETURN
|
|
final script = out.scriptPubKey.script;
|
|
if (script.contains('OP_RETURN')) {
|
|
final index = script.indexOf('OP_RETURN');
|
|
if (index + 1 <= script.length) {
|
|
try {
|
|
final opReturnData = script[index + 1].toString();
|
|
final decodedString = utf8.decode(HEX.decode(opReturnData));
|
|
outputAddresses.add('OP_RETURN:$decodedString');
|
|
} catch (_) {
|
|
outputAddresses.add('OP_RETURN:');
|
|
}
|
|
}
|
|
}
|
|
}
|
|
tx.inputAddresses = inputAddresses;
|
|
tx.outputAddresses = outputAddresses;
|
|
|
|
transactionHistory.addOne(tx);
|
|
}
|
|
}
|
|
}
|
|
|
|
class ScanNode {
|
|
final Uri uri;
|
|
final bool? useSSL;
|
|
|
|
ScanNode(this.uri, this.useSSL);
|
|
}
|
|
|
|
class ScanData {
|
|
final SendPort sendPort;
|
|
final SilentPaymentOwner silentAddress;
|
|
final int height;
|
|
final ScanNode? node;
|
|
final BasedUtxoNetwork network;
|
|
final int chainTip;
|
|
final ElectrumClient electrumClient;
|
|
final List<String> transactionHistoryIds;
|
|
final Map<String, String> labels;
|
|
final List<int> labelIndexes;
|
|
final bool isSingleScan;
|
|
|
|
ScanData({
|
|
required this.sendPort,
|
|
required this.silentAddress,
|
|
required this.height,
|
|
required this.node,
|
|
required this.network,
|
|
required this.chainTip,
|
|
required this.electrumClient,
|
|
required this.transactionHistoryIds,
|
|
required this.labels,
|
|
required this.labelIndexes,
|
|
required this.isSingleScan,
|
|
});
|
|
|
|
factory ScanData.fromHeight(ScanData scanData, int newHeight) {
|
|
return ScanData(
|
|
sendPort: scanData.sendPort,
|
|
silentAddress: scanData.silentAddress,
|
|
height: newHeight,
|
|
node: scanData.node,
|
|
network: scanData.network,
|
|
chainTip: scanData.chainTip,
|
|
transactionHistoryIds: scanData.transactionHistoryIds,
|
|
electrumClient: scanData.electrumClient,
|
|
labels: scanData.labels,
|
|
labelIndexes: scanData.labelIndexes,
|
|
isSingleScan: scanData.isSingleScan,
|
|
);
|
|
}
|
|
}
|
|
|
|
class SyncResponse {
|
|
final int height;
|
|
final SyncStatus syncStatus;
|
|
|
|
SyncResponse(this.height, this.syncStatus);
|
|
}
|
|
|
|
Future<void> startRefresh(ScanData scanData) async {
|
|
int syncHeight = scanData.height;
|
|
int initialSyncHeight = syncHeight;
|
|
|
|
BehaviorSubject<Object>? tweaksSubscription = null;
|
|
|
|
final electrumClient = scanData.electrumClient;
|
|
await electrumClient.connectToUri(
|
|
scanData.node?.uri ?? Uri.parse("tcp://electrs.cakewallet.com:50001"),
|
|
useSSL: scanData.node?.useSSL ?? false,
|
|
);
|
|
|
|
int getCountPerRequest(int syncHeight) {
|
|
if (scanData.isSingleScan) {
|
|
return 1;
|
|
}
|
|
|
|
final amountLeft = scanData.chainTip - syncHeight + 1;
|
|
return amountLeft;
|
|
}
|
|
|
|
if (tweaksSubscription == null) {
|
|
final receiver = Receiver(
|
|
scanData.silentAddress.b_scan.toHex(),
|
|
scanData.silentAddress.B_spend.toHex(),
|
|
scanData.network == BitcoinNetwork.testnet,
|
|
scanData.labelIndexes,
|
|
scanData.labelIndexes.length,
|
|
);
|
|
|
|
// Initial status UI update, send how many blocks in total to scan
|
|
final initialCount = getCountPerRequest(syncHeight);
|
|
scanData.sendPort.send(SyncResponse(syncHeight, StartingScanSyncStatus(syncHeight)));
|
|
|
|
tweaksSubscription = await electrumClient.tweaksSubscribe(
|
|
height: syncHeight,
|
|
count: initialCount,
|
|
);
|
|
|
|
Future<void> listenFn(t) async {
|
|
final tweaks = t as Map<String, dynamic>;
|
|
final msg = tweaks["message"];
|
|
// success or error msg
|
|
final noData = msg != null;
|
|
|
|
if (noData) {
|
|
// re-subscribe to continue receiving messages, starting from the next unscanned height
|
|
final nextHeight = syncHeight + 1;
|
|
final nextCount = getCountPerRequest(nextHeight);
|
|
|
|
if (nextCount > 0) {
|
|
tweaksSubscription?.close();
|
|
|
|
final nextTweaksSubscription = electrumClient.tweaksSubscribe(
|
|
height: nextHeight,
|
|
count: nextCount,
|
|
);
|
|
nextTweaksSubscription?.listen(listenFn);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
// Continuous status UI update, send how many blocks left to scan
|
|
final syncingStatus = scanData.isSingleScan
|
|
? SyncingSyncStatus(1, 0)
|
|
: SyncingSyncStatus.fromHeightValues(scanData.chainTip, initialSyncHeight, syncHeight);
|
|
scanData.sendPort.send(SyncResponse(syncHeight, syncingStatus));
|
|
|
|
final blockHeight = tweaks.keys.first;
|
|
final tweakHeight = int.parse(blockHeight);
|
|
|
|
try {
|
|
final blockTweaks = tweaks[blockHeight] as Map<String, dynamic>;
|
|
|
|
for (var j = 0; j < blockTweaks.keys.length; j++) {
|
|
final txid = blockTweaks.keys.elementAt(j);
|
|
final details = blockTweaks[txid] as Map<String, dynamic>;
|
|
final outputPubkeys = (details["output_pubkeys"] as Map<dynamic, dynamic>);
|
|
final tweak = details["tweak"].toString();
|
|
|
|
try {
|
|
// scanOutputs called from rust here
|
|
final addToWallet = scanOutputs(
|
|
outputPubkeys.values.toList(),
|
|
tweak,
|
|
receiver,
|
|
);
|
|
|
|
if (addToWallet.isEmpty) {
|
|
// no results tx, continue to next tx
|
|
continue;
|
|
}
|
|
|
|
// placeholder ElectrumTransactionInfo object to update values based on new scanned unspent(s)
|
|
final txInfo = ElectrumTransactionInfo(
|
|
WalletType.bitcoin,
|
|
id: txid,
|
|
height: tweakHeight,
|
|
amount: 0,
|
|
fee: 0,
|
|
direction: TransactionDirection.incoming,
|
|
isPending: false,
|
|
date: scanData.network == BitcoinNetwork.mainnet
|
|
? getDateByBitcoinHeight(tweakHeight)
|
|
: DateTime.now(),
|
|
confirmations: scanData.chainTip - tweakHeight + 1,
|
|
unspents: [],
|
|
isReceivedSilentPayment: true,
|
|
);
|
|
|
|
addToWallet.forEach((label, value) {
|
|
(value as Map<String, dynamic>).forEach((output, tweak) {
|
|
final t_k = tweak.toString();
|
|
|
|
final receivingOutputAddress = ECPublic.fromHex(output)
|
|
.toTaprootAddress(tweak: false)
|
|
.toAddress(scanData.network);
|
|
|
|
int? amount;
|
|
int? pos;
|
|
outputPubkeys.entries.firstWhere((k) {
|
|
final isMatchingOutput = k.value[0] == output;
|
|
if (isMatchingOutput) {
|
|
amount = int.parse(k.value[1].toString());
|
|
pos = int.parse(k.key.toString());
|
|
return true;
|
|
}
|
|
return false;
|
|
});
|
|
|
|
final receivedAddressRecord = BitcoinSilentPaymentAddressRecord(
|
|
receivingOutputAddress,
|
|
index: 0,
|
|
isHidden: false,
|
|
isUsed: true,
|
|
network: scanData.network,
|
|
silentPaymentTweak: t_k,
|
|
type: SegwitAddresType.p2tr,
|
|
txCount: 1,
|
|
balance: amount!,
|
|
);
|
|
|
|
final unspent = BitcoinSilentPaymentsUnspent(
|
|
receivedAddressRecord,
|
|
txid,
|
|
amount!,
|
|
pos!,
|
|
silentPaymentTweak: t_k,
|
|
silentPaymentLabel: label == "None" ? null : label,
|
|
);
|
|
|
|
txInfo.unspents!.add(unspent);
|
|
txInfo.amount += unspent.value;
|
|
});
|
|
});
|
|
|
|
scanData.sendPort.send({txInfo.id: txInfo});
|
|
} catch (_) {}
|
|
}
|
|
} catch (_) {}
|
|
|
|
syncHeight = tweakHeight;
|
|
|
|
if (tweakHeight >= scanData.chainTip || scanData.isSingleScan) {
|
|
if (tweakHeight >= scanData.chainTip)
|
|
scanData.sendPort.send(SyncResponse(
|
|
syncHeight,
|
|
SyncedTipSyncStatus(scanData.chainTip),
|
|
));
|
|
|
|
if (scanData.isSingleScan) {
|
|
scanData.sendPort.send(SyncResponse(syncHeight, SyncedSyncStatus()));
|
|
}
|
|
|
|
await tweaksSubscription!.close();
|
|
await electrumClient.close();
|
|
}
|
|
}
|
|
|
|
tweaksSubscription?.listen(listenFn);
|
|
}
|
|
|
|
if (tweaksSubscription == null) {
|
|
return scanData.sendPort.send(
|
|
SyncResponse(syncHeight, UnsupportedSyncStatus()),
|
|
);
|
|
}
|
|
}
|
|
|
|
class EstimatedTxResult {
|
|
EstimatedTxResult({
|
|
required this.utxos,
|
|
required this.inputPrivKeyInfos,
|
|
required this.publicKeys,
|
|
required this.fee,
|
|
required this.amount,
|
|
required this.hasChange,
|
|
required this.isSendAll,
|
|
this.memo,
|
|
required this.spendsSilentPayment,
|
|
required this.spendsUnconfirmedTX,
|
|
});
|
|
|
|
final List<UtxoWithAddress> utxos;
|
|
final List<ECPrivateInfo> inputPrivKeyInfos;
|
|
final Map<String, PublicKeyWithDerivationPath> publicKeys; // PubKey to derivationPath
|
|
final int fee;
|
|
final int amount;
|
|
final bool spendsSilentPayment;
|
|
// final bool sendsToSilentPayment;
|
|
final bool hasChange;
|
|
final bool isSendAll;
|
|
final String? memo;
|
|
final bool spendsUnconfirmedTX;
|
|
}
|
|
|
|
class PublicKeyWithDerivationPath {
|
|
const PublicKeyWithDerivationPath(this.publicKey, this.derivationPath);
|
|
|
|
final String derivationPath;
|
|
final String publicKey;
|
|
}
|
|
|
|
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 if (type is SilentPaymentsAddresType) {
|
|
return SilentPaymentsAddresType.p2sp;
|
|
} else {
|
|
return SegwitAddresType.p2wpkh;
|
|
}
|
|
}
|
|
|
|
class UtxoDetails {
|
|
final List<BitcoinUnspent> availableInputs;
|
|
final List<BitcoinUnspent> unconfirmedCoins;
|
|
final List<UtxoWithAddress> utxos;
|
|
final List<Outpoint> vinOutpoints;
|
|
final List<ECPrivateInfo> inputPrivKeyInfos;
|
|
final Map<String, PublicKeyWithDerivationPath> publicKeys; // PubKey to derivationPath
|
|
final int allInputsAmount;
|
|
final bool spendsSilentPayment;
|
|
final bool spendsUnconfirmedTX;
|
|
|
|
UtxoDetails({
|
|
required this.availableInputs,
|
|
required this.unconfirmedCoins,
|
|
required this.utxos,
|
|
required this.vinOutpoints,
|
|
required this.inputPrivKeyInfos,
|
|
required this.publicKeys,
|
|
required this.allInputsAmount,
|
|
required this.spendsSilentPayment,
|
|
required this.spendsUnconfirmedTX,
|
|
});
|
|
}
|