mirror of
https://github.com/cake-tech/cake_wallet.git
synced 2024-11-17 09:47:35 +00:00
803 lines
27 KiB
Dart
803 lines
27 KiB
Dart
import 'dart:async';
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import 'dart:math';
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import 'package:collection/collection.dart';
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import 'package:convert/convert.dart' as convert;
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import 'package:crypto/crypto.dart';
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import 'package:cw_core/cake_hive.dart';
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import 'package:cw_core/mweb_utxo.dart';
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import 'package:cw_mweb/mwebd.pbgrpc.dart';
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import 'package:fixnum/fixnum.dart';
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import 'package:bip39/bip39.dart' as bip39;
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import 'package:bitcoin_base/bitcoin_base.dart';
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import 'package:blockchain_utils/blockchain_utils.dart';
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import 'package:cw_bitcoin/bitcoin_address_record.dart';
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import 'package:cw_bitcoin/bitcoin_mnemonic.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/electrum_transaction_info.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/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/unspent_coins_info.dart';
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import 'package:cw_bitcoin/electrum_balance.dart';
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import 'package:cw_bitcoin/electrum_wallet.dart';
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import 'package:cw_bitcoin/electrum_wallet_snapshot.dart';
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import 'package:cw_bitcoin/litecoin_wallet_addresses.dart';
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import 'package:cw_core/transaction_priority.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: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:cw_core/wallet_type.dart';
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import 'package:cw_mweb/cw_mweb.dart';
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part 'litecoin_wallet.g.dart';
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class LitecoinWallet = LitecoinWalletBase with _$LitecoinWallet;
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abstract class LitecoinWalletBase extends ElectrumWallet with Store {
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LitecoinWalletBase({
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required String mnemonic,
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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 Uint8List seedBytes,
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String? addressPageType,
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List<BitcoinAddressRecord>? initialAddresses,
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ElectrumBalance? initialBalance,
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Map<String, int>? initialRegularAddressIndex,
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Map<String, int>? initialChangeAddressIndex,
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int? initialMwebHeight,
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bool? alwaysScan,
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}) : super(
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mnemonic: mnemonic,
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password: password,
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walletInfo: walletInfo,
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unspentCoinsInfo: unspentCoinsInfo,
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network: LitecoinNetwork.mainnet,
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initialAddresses: initialAddresses,
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initialBalance: initialBalance,
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seedBytes: seedBytes,
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currency: CryptoCurrency.ltc,
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) {
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mwebHd = Bip32Slip10Secp256k1.fromSeed(seedBytes).derivePath("m/1000'") as Bip32Slip10Secp256k1;
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mwebEnabled = alwaysScan ?? false;
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walletAddresses = LitecoinWalletAddresses(
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walletInfo,
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initialAddresses: initialAddresses,
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initialRegularAddressIndex: initialRegularAddressIndex,
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initialChangeAddressIndex: initialChangeAddressIndex,
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mainHd: hd,
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sideHd: accountHD.childKey(Bip32KeyIndex(1)),
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network: network,
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mwebHd: mwebHd,
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);
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autorun((_) {
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this.walletAddresses.isEnabledAutoGenerateSubaddress = this.isEnabledAutoGenerateSubaddress;
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});
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CwMweb.stub().then((value) {
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_stub = value;
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});
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}
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late final Bip32Slip10Secp256k1 mwebHd;
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late final Box<MwebUtxo> mwebUtxosBox;
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Timer? _syncTimer;
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StreamSubscription<Utxo>? _utxoStream;
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int mwebUtxosHeight = 0;
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late RpcClient _stub;
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late bool mwebEnabled;
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List<int> get scanSecret => mwebHd.childKey(Bip32KeyIndex(0x80000000)).privateKey.privKey.raw;
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List<int> get spendSecret => mwebHd.childKey(Bip32KeyIndex(0x80000001)).privateKey.privKey.raw;
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static Future<LitecoinWallet> create(
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{required String mnemonic,
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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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String? passphrase,
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String? addressPageType,
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List<BitcoinAddressRecord>? initialAddresses,
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ElectrumBalance? initialBalance,
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Map<String, int>? initialRegularAddressIndex,
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Map<String, int>? initialChangeAddressIndex}) async {
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late Uint8List seedBytes;
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switch (walletInfo.derivationInfo?.derivationType) {
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case DerivationType.bip39:
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seedBytes = await bip39.mnemonicToSeed(
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mnemonic,
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passphrase: passphrase ?? "",
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);
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break;
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case DerivationType.electrum:
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default:
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seedBytes = await mnemonicToSeedBytes(mnemonic);
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break;
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}
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return LitecoinWallet(
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mnemonic: mnemonic,
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password: password,
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walletInfo: walletInfo,
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unspentCoinsInfo: unspentCoinsInfo,
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initialAddresses: initialAddresses,
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initialBalance: initialBalance,
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seedBytes: seedBytes,
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initialRegularAddressIndex: initialRegularAddressIndex,
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initialChangeAddressIndex: initialChangeAddressIndex,
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addressPageType: addressPageType,
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);
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}
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static Future<LitecoinWallet> open({
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required String name,
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required WalletInfo walletInfo,
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required Box<UnspentCoinsInfo> unspentCoinsInfo,
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required String password,
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required bool alwaysScan,
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}) async {
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final hasKeysFile = await WalletKeysFile.hasKeysFile(name, walletInfo.type);
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ElectrumWalletSnapshot? snp = null;
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try {
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snp = await ElectrumWalletSnapshot.load(
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name, walletInfo.type, password, LitecoinNetwork.mainnet);
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} catch (e) {
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if (!hasKeysFile) rethrow;
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}
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final WalletKeysData keysData;
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// Migrate wallet from the old scheme to then new .keys file scheme
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if (!hasKeysFile) {
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keysData =
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WalletKeysData(mnemonic: snp!.mnemonic, xPub: snp.xpub, passphrase: snp.passphrase);
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} else {
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keysData = await WalletKeysFile.readKeysFile(name, walletInfo.type, password);
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}
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return LitecoinWallet(
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mnemonic: keysData.mnemonic!,
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password: password,
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walletInfo: walletInfo,
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unspentCoinsInfo: unspentCoinsInfo,
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initialAddresses: snp?.addresses,
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initialBalance: snp?.balance,
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seedBytes: await mnemonicToSeedBytes(keysData.mnemonic!),
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initialRegularAddressIndex: snp?.regularAddressIndex,
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initialChangeAddressIndex: snp?.changeAddressIndex,
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addressPageType: snp?.addressPageType,
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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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if (!mwebEnabled) {
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syncStatus = SyncronizingSyncStatus();
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await subscribeForUpdates();
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await updateTransactions();
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syncStatus = SyncedSyncStatus();
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return;
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}
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await subscribeForUpdates();
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await updateTransactions();
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await updateFeeRates();
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Timer.periodic(const Duration(minutes: 1), (timer) async => await updateFeeRates());
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_stub = await CwMweb.stub();
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_syncTimer?.cancel();
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_syncTimer = Timer.periodic(const Duration(milliseconds: 1500), (timer) async {
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if (syncStatus is FailedSyncStatus) return;
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final height = await electrumClient.getCurrentBlockChainTip() ?? 0;
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final resp = await _stub.status(StatusRequest());
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if (resp.blockHeaderHeight < height) {
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int h = resp.blockHeaderHeight;
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syncStatus = SyncingSyncStatus(height - h, h / height);
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} else if (resp.mwebHeaderHeight < height) {
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int h = resp.mwebHeaderHeight;
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syncStatus = SyncingSyncStatus(height - h, h / height);
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} else if (resp.mwebUtxosHeight < height) {
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syncStatus = SyncingSyncStatus(1, 0.999);
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} else {
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// prevent unnecessary reaction triggers:
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if (syncStatus is! SyncedSyncStatus) {
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syncStatus = SyncedSyncStatus();
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}
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if (resp.mwebUtxosHeight > mwebUtxosHeight) {
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mwebUtxosHeight = resp.mwebUtxosHeight;
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await checkMwebUtxosSpent();
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// update the confirmations for each transaction:
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for (final transaction in transactionHistory.transactions.values) {
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if (transaction.isPending) continue;
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int txHeight = transaction.height ?? mwebUtxosHeight;
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final confirmations = (mwebUtxosHeight - txHeight) + 1;
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if (transaction.confirmations == confirmations) continue;
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transaction.confirmations = confirmations;
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transactionHistory.addOne(transaction);
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}
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await transactionHistory.save();
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}
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}
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});
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updateUnspent();
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fetchBalances();
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// this runs in the background and processes new utxos as they come in:
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processMwebUtxos();
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}
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@action
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@override
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Future<void> stopSync() async {
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_syncTimer?.cancel();
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_utxoStream?.cancel();
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await CwMweb.stop();
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}
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Future<void> initMwebUtxosBox() async {
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final boxName = "${walletInfo.name.replaceAll(" ", "_")}_${MwebUtxo.boxName}";
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mwebUtxosBox = await CakeHive.openBox<MwebUtxo>(boxName);
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}
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@override
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Future<void> renameWalletFiles(String newWalletName) async {
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// rename the hive box:
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final oldBoxName = "${walletInfo.name.replaceAll(" ", "_")}_${MwebUtxo.boxName}";
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final newBoxName = "${newWalletName.replaceAll(" ", "_")}_${MwebUtxo.boxName}";
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final oldBox = await Hive.openBox<MwebUtxo>(oldBoxName);
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mwebUtxosBox = await CakeHive.openBox<MwebUtxo>(newBoxName);
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for (final key in oldBox.keys) {
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await mwebUtxosBox.put(key, oldBox.get(key)!);
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}
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await super.renameWalletFiles(newWalletName);
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}
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@action
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@override
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Future<void> rescan({
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required int height,
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int? chainTip,
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ScanData? scanData,
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bool? doSingleScan,
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bool? usingElectrs,
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}) async {
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await mwebUtxosBox.clear();
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transactionHistory.clear();
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mwebUtxosHeight = height;
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await walletInfo.updateRestoreHeight(height);
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// reset coin balances and txCount to 0:
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unspentCoins.forEach((coin) {
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if (coin.bitcoinAddressRecord is! BitcoinSilentPaymentAddressRecord)
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coin.bitcoinAddressRecord.balance = 0;
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coin.bitcoinAddressRecord.txCount = 0;
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});
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for (var addressRecord in walletAddresses.allAddresses) {
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addressRecord.balance = 0;
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addressRecord.txCount = 0;
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}
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print("STARTING SYNC");
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await startSync();
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}
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@override
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Future<void> init() async {
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await super.init();
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await initMwebUtxosBox();
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}
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Future<void> handleIncoming(MwebUtxo utxo, RpcClient stub) async {
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final status = await stub.status(StatusRequest());
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var date = DateTime.now();
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var confirmations = 0;
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if (utxo.height > 0) {
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date = DateTime.fromMillisecondsSinceEpoch(utxo.blockTime * 1000);
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confirmations = status.blockHeaderHeight - utxo.height + 1;
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}
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var tx = transactionHistory.transactions.values
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.firstWhereOrNull((tx) => tx.outputAddresses?.contains(utxo.outputId) ?? false);
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if (tx == null) {
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tx = ElectrumTransactionInfo(
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WalletType.litecoin,
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id: utxo.outputId,
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height: utxo.height,
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amount: utxo.value.toInt(),
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fee: 0,
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direction: TransactionDirection.incoming,
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isPending: utxo.height == 0,
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date: date,
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confirmations: confirmations,
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inputAddresses: [],
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outputAddresses: [utxo.outputId],
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);
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}
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bool isNew = transactionHistory.transactions[tx.id] == null;
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// don't update the confirmations if the tx is updated by electrum:
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if (tx.confirmations == 0 || utxo.height != 0) {
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tx.height = utxo.height;
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tx.isPending = utxo.height == 0;
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tx.confirmations = confirmations;
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}
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if (!(tx.outputAddresses?.contains(utxo.address) ?? false)) {
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tx.outputAddresses?.add(utxo.address);
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isNew = true;
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}
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if (isNew) {
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final addressRecord = walletAddresses.allAddresses
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.firstWhereOrNull((addressRecord) => addressRecord.address == utxo.address);
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if (addressRecord == null) {
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return;
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}
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// if our address isn't in the inputs, update the txCount:
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final inputAddresses = tx.inputAddresses ?? [];
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if (!inputAddresses.contains(utxo.address)) {
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addressRecord.txCount++;
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}
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addressRecord.balance += utxo.value.toInt();
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addressRecord.setAsUsed();
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}
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transactionHistory.addOne(tx);
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if (isNew) {
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// update the unconfirmed balance when a new tx is added:
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// we do this after adding the tx to the history so that sub address balances are updated correctly
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// (since that calculation is based on the tx history)
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await updateBalance();
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}
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}
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Future<void> processMwebUtxos() async {
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int restoreHeight = walletInfo.restoreHeight;
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print("SCANNING FROM HEIGHT: $restoreHeight");
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final req = UtxosRequest(scanSecret: scanSecret, fromHeight: restoreHeight);
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// process old utxos:
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for (final utxo in mwebUtxosBox.values) {
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if (utxo.address.isEmpty) {
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continue;
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}
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// if (walletInfo.restoreHeight > utxo.height) {
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// continue;
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// }
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await handleIncoming(utxo, _stub);
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if (utxo.height > walletInfo.restoreHeight) {
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await walletInfo.updateRestoreHeight(utxo.height);
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}
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}
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// process new utxos as they come in:
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_utxoStream?.cancel();
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_utxoStream = _stub.utxos(req).listen((Utxo sUtxo) async {
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final utxo = MwebUtxo(
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address: sUtxo.address,
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blockTime: sUtxo.blockTime,
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height: sUtxo.height,
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outputId: sUtxo.outputId,
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value: sUtxo.value.toInt(),
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);
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if (mwebUtxosBox.containsKey(utxo.outputId)) {
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// we've already stored this utxo, skip it:
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return;
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}
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// if (utxo.address.isEmpty) {
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// await updateUnspent();
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// await updateBalance();
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// initDone = true;
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// }
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await updateUnspent();
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await updateBalance();
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final mwebAddrs = (walletAddresses as LitecoinWalletAddresses).mwebAddrs;
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// don't process utxos with addresses that are not in the mwebAddrs list:
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if (utxo.address.isNotEmpty && !mwebAddrs.contains(utxo.address)) {
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return;
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}
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await mwebUtxosBox.put(utxo.outputId, utxo);
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await handleIncoming(utxo, _stub);
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});
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}
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Future<void> checkMwebUtxosSpent() async {
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while ((await Future.wait(transactionHistory.transactions.values
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.where((tx) => tx.direction == TransactionDirection.outgoing && tx.isPending)
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.map(checkPendingTransaction)))
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.any((x) => x));
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final outputIds =
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mwebUtxosBox.values.where((utxo) => utxo.height > 0).map((utxo) => utxo.outputId).toList();
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final resp = await _stub.spent(SpentRequest(outputId: outputIds));
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final spent = resp.outputId;
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if (spent.isEmpty) return;
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final status = await _stub.status(StatusRequest());
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final height = await electrumClient.getCurrentBlockChainTip();
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if (height == null || status.blockHeaderHeight != height) return;
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if (status.mwebUtxosHeight != height) return;
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int amount = 0;
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Set<String> inputAddresses = {};
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var output = convert.AccumulatorSink<Digest>();
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var input = sha256.startChunkedConversion(output);
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for (final outputId in spent) {
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final utxo = mwebUtxosBox.get(outputId);
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await mwebUtxosBox.delete(outputId);
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if (utxo == null) continue;
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final addressRecord = walletAddresses.allAddresses
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.firstWhere((addressRecord) => addressRecord.address == utxo.address);
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if (!inputAddresses.contains(utxo.address)) {
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addressRecord.txCount++;
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// print("COUNT UPDATED HERE 3!!!!! ${addressRecord.address} ${addressRecord.txCount} !!!!!!");
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}
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addressRecord.balance -= utxo.value.toInt();
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amount += utxo.value.toInt();
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inputAddresses.add(utxo.address);
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input.add(hex.decode(outputId));
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}
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if (inputAddresses.isEmpty) return;
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input.close();
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var digest = output.events.single;
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final tx = ElectrumTransactionInfo(
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WalletType.litecoin,
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id: digest.toString(),
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height: height,
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amount: amount,
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fee: 0,
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direction: TransactionDirection.outgoing,
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isPending: false,
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date: DateTime.fromMillisecondsSinceEpoch(status.blockTime * 1000),
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confirmations: 1,
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inputAddresses: inputAddresses.toList(),
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outputAddresses: [],
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);
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print("BEING ADDED HERE@@@@@@@@@@@@@@@@@@@@@@@2");
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transactionHistory.addOne(tx);
|
|
await transactionHistory.save();
|
|
}
|
|
|
|
Future<bool> checkPendingTransaction(ElectrumTransactionInfo tx) async {
|
|
if (!tx.isPending) return false;
|
|
final outputId = <String>[], target = <String>{};
|
|
final isHash = RegExp(r'^[a-f0-9]{64}$').hasMatch;
|
|
final spendingOutputIds = tx.inputAddresses?.where(isHash) ?? [];
|
|
final payingToOutputIds = tx.outputAddresses?.where(isHash) ?? [];
|
|
outputId.addAll(spendingOutputIds);
|
|
outputId.addAll(payingToOutputIds);
|
|
target.addAll(spendingOutputIds);
|
|
for (final outputId in payingToOutputIds) {
|
|
final spendingTx = transactionHistory.transactions.values
|
|
.firstWhereOrNull((tx) => tx.inputAddresses?.contains(outputId) ?? false);
|
|
if (spendingTx != null && !spendingTx.isPending) {
|
|
target.add(outputId);
|
|
}
|
|
}
|
|
if (outputId.isEmpty) {
|
|
return false;
|
|
}
|
|
final resp = await _stub.spent(SpentRequest(outputId: outputId));
|
|
if (!setEquals(resp.outputId.toSet(), target)) return false;
|
|
final status = await _stub.status(StatusRequest());
|
|
if (!tx.isPending) return false;
|
|
tx.height = status.mwebUtxosHeight;
|
|
tx.confirmations = 1;
|
|
tx.isPending = false;
|
|
await transactionHistory.save();
|
|
return true;
|
|
}
|
|
|
|
@override
|
|
Future<void> updateUnspent() async {
|
|
await super.updateUnspent();
|
|
await checkMwebUtxosSpent();
|
|
}
|
|
|
|
@override
|
|
@action
|
|
Future<void> updateAllUnspents() async {
|
|
List<BitcoinUnspent> updatedUnspentCoins = [];
|
|
|
|
await Future.wait(walletAddresses.allAddresses.map((address) async {
|
|
updatedUnspentCoins.addAll(await fetchUnspent(address));
|
|
}));
|
|
|
|
if (mwebEnabled) {
|
|
// update mweb unspents:
|
|
final mwebAddrs = (walletAddresses as LitecoinWalletAddresses).mwebAddrs;
|
|
mwebUtxosBox.keys.forEach((dynamic oId) {
|
|
final String outputId = oId as String;
|
|
final utxo = mwebUtxosBox.get(outputId);
|
|
if (utxo == null) {
|
|
return;
|
|
}
|
|
if (utxo.address.isEmpty) {
|
|
// not sure if a bug or a special case but we definitely ignore these
|
|
return;
|
|
}
|
|
final addressRecord = walletAddresses.allAddresses
|
|
.firstWhereOrNull((addressRecord) => addressRecord.address == utxo.address);
|
|
|
|
if (addressRecord == null) {
|
|
print("utxo contains an address that is not in the wallet: ${utxo.address}");
|
|
return;
|
|
}
|
|
final unspent = BitcoinUnspent(
|
|
addressRecord,
|
|
outputId,
|
|
utxo.value.toInt(),
|
|
mwebAddrs.indexOf(utxo.address),
|
|
);
|
|
if (unspent.vout == 0) {
|
|
unspent.isChange = true;
|
|
}
|
|
updatedUnspentCoins.add(unspent);
|
|
});
|
|
}
|
|
|
|
unspentCoins = updatedUnspentCoins;
|
|
}
|
|
|
|
@override
|
|
Future<ElectrumBalance> fetchBalances() async {
|
|
final balance = await super.fetchBalances();
|
|
var confirmed = balance.confirmed;
|
|
var unconfirmed = balance.unconfirmed;
|
|
mwebUtxosBox.values.forEach((utxo) {
|
|
if (utxo.height > 0) {
|
|
confirmed += utxo.value.toInt();
|
|
} else {
|
|
unconfirmed += utxo.value.toInt();
|
|
}
|
|
});
|
|
|
|
// update unspent balances:
|
|
|
|
// reset coin balances and txCount to 0:
|
|
// unspentCoins.forEach((coin) {
|
|
// if (coin.bitcoinAddressRecord is! BitcoinSilentPaymentAddressRecord)
|
|
// coin.bitcoinAddressRecord.balance = 0;
|
|
// coin.bitcoinAddressRecord.txCount = 0;
|
|
// });
|
|
for (var addressRecord in walletAddresses.allAddresses) {
|
|
addressRecord.balance = 0;
|
|
addressRecord.txCount = 0;
|
|
}
|
|
|
|
unspentCoins.forEach((coin) {
|
|
final coinInfoList = unspentCoinsInfo.values.where(
|
|
(element) =>
|
|
element.walletId.contains(id) &&
|
|
element.hash.contains(coin.hash) &&
|
|
element.vout == coin.vout,
|
|
);
|
|
|
|
if (coinInfoList.isNotEmpty) {
|
|
final coinInfo = coinInfoList.first;
|
|
|
|
coin.isFrozen = coinInfo.isFrozen;
|
|
coin.isSending = coinInfo.isSending;
|
|
coin.note = coinInfo.note;
|
|
if (coin.bitcoinAddressRecord is! BitcoinSilentPaymentAddressRecord)
|
|
coin.bitcoinAddressRecord.balance += coinInfo.value;
|
|
} else {
|
|
super.addCoinInfo(coin);
|
|
}
|
|
});
|
|
|
|
// update the txCount for each address using the tx history, since we can't rely on mwebd
|
|
// to have an accurate count, we should just keep it in sync with what we know from the tx history:
|
|
for (var tx in transactionHistory.transactions.values) {
|
|
if (tx.isPending) continue;
|
|
final txAddresses = tx.inputAddresses! + tx.outputAddresses!;
|
|
for (var address in txAddresses) {
|
|
final addressRecord = walletAddresses.allAddresses
|
|
.firstWhereOrNull((addressRecord) => addressRecord.address == address);
|
|
if (addressRecord == null) {
|
|
continue;
|
|
}
|
|
addressRecord.txCount++;
|
|
}
|
|
}
|
|
|
|
await updateUnspent();
|
|
|
|
return ElectrumBalance(confirmed: confirmed, unconfirmed: unconfirmed, frozen: balance.frozen);
|
|
}
|
|
|
|
@override
|
|
int feeRate(TransactionPriority priority) {
|
|
if (priority is LitecoinTransactionPriority) {
|
|
switch (priority) {
|
|
case LitecoinTransactionPriority.slow:
|
|
return 1;
|
|
case LitecoinTransactionPriority.medium:
|
|
return 2;
|
|
case LitecoinTransactionPriority.fast:
|
|
return 3;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
@override
|
|
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 {
|
|
final spendsMweb = utxos.any((utxo) => utxo.utxo.scriptType == SegwitAddresType.mweb);
|
|
final paysToMweb = outputs
|
|
.any((output) => output.toOutput.scriptPubKey.getAddressType() == SegwitAddresType.mweb);
|
|
if (!spendsMweb && !paysToMweb) {
|
|
return await super.calcFee(
|
|
utxos: utxos,
|
|
outputs: outputs,
|
|
network: network,
|
|
memo: memo,
|
|
feeRate: feeRate,
|
|
inputPrivKeyInfos: inputPrivKeyInfos,
|
|
vinOutpoints: vinOutpoints,
|
|
);
|
|
}
|
|
if (outputs.length == 1 && outputs[0].toOutput.amount == BigInt.zero) {
|
|
outputs = [
|
|
BitcoinScriptOutput(
|
|
script: outputs[0].toOutput.scriptPubKey, value: utxos.sumOfUtxosValue())
|
|
];
|
|
}
|
|
final preOutputSum =
|
|
outputs.fold<BigInt>(BigInt.zero, (acc, output) => acc + output.toOutput.amount);
|
|
final fee = utxos.sumOfUtxosValue() - preOutputSum;
|
|
final txb =
|
|
BitcoinTransactionBuilder(utxos: utxos, outputs: outputs, fee: fee, network: network);
|
|
final resp = await _stub.create(CreateRequest(
|
|
rawTx: txb.buildTransaction((a, b, c, d) => '').toBytes(),
|
|
scanSecret: scanSecret,
|
|
spendSecret: spendSecret,
|
|
feeRatePerKb: Int64(feeRate * 1000),
|
|
dryRun: true));
|
|
final tx = BtcTransaction.fromRaw(hex.encode(resp.rawTx));
|
|
final posUtxos = utxos
|
|
.where((utxo) => tx.inputs
|
|
.any((input) => input.txId == utxo.utxo.txHash && input.txIndex == utxo.utxo.vout))
|
|
.toList();
|
|
final posOutputSum = tx.outputs.fold<int>(0, (acc, output) => acc + output.amount.toInt());
|
|
final mwebInputSum = utxos.sumOfUtxosValue() - posUtxos.sumOfUtxosValue();
|
|
final expectedPegin = max(0, (preOutputSum - mwebInputSum).toInt());
|
|
var feeIncrease = posOutputSum - expectedPegin;
|
|
if (expectedPegin > 0 && fee == BigInt.zero) {
|
|
feeIncrease += await super.calcFee(
|
|
utxos: posUtxos,
|
|
outputs: tx.outputs
|
|
.map((output) =>
|
|
BitcoinScriptOutput(script: output.scriptPubKey, value: output.amount))
|
|
.toList(),
|
|
network: network,
|
|
memo: memo,
|
|
feeRate: feeRate) +
|
|
feeRate * 41;
|
|
}
|
|
return fee.toInt() + feeIncrease;
|
|
}
|
|
|
|
@override
|
|
Future<PendingTransaction> createTransaction(Object credentials) async {
|
|
try {
|
|
var tx = await super.createTransaction(credentials) as PendingBitcoinTransaction;
|
|
tx.isMweb = mwebEnabled;
|
|
|
|
if (!mwebEnabled) {
|
|
return tx;
|
|
}
|
|
|
|
final resp = await _stub.create(CreateRequest(
|
|
rawTx: hex.decode(tx.hex),
|
|
scanSecret: scanSecret,
|
|
spendSecret: spendSecret,
|
|
feeRatePerKb: Int64.parseInt(tx.feeRate) * 1000,
|
|
));
|
|
final tx2 = BtcTransaction.fromRaw(hex.encode(resp.rawTx));
|
|
tx.hexOverride = tx2
|
|
.copyWith(
|
|
witnesses: tx2.inputs.asMap().entries.map((e) {
|
|
final utxo = unspentCoins
|
|
.firstWhere((utxo) => utxo.hash == e.value.txId && utxo.vout == e.value.txIndex);
|
|
final key = generateECPrivate(
|
|
hd: utxo.bitcoinAddressRecord.isHidden
|
|
? walletAddresses.sideHd
|
|
: walletAddresses.mainHd,
|
|
index: utxo.bitcoinAddressRecord.index,
|
|
network: network);
|
|
final digest = tx2.getTransactionSegwitDigit(
|
|
txInIndex: e.key,
|
|
script: key.getPublic().toP2pkhAddress().toScriptPubKey(),
|
|
amount: BigInt.from(utxo.value),
|
|
);
|
|
return TxWitnessInput(stack: [key.signInput(digest), key.getPublic().toHex()]);
|
|
}).toList())
|
|
.toHex();
|
|
tx.outputs = resp.outputId;
|
|
return tx
|
|
..addListener((transaction) async {
|
|
final addresses = <String>{};
|
|
transaction.inputAddresses?.forEach((id) async {
|
|
final utxo = mwebUtxosBox.get(id);
|
|
await mwebUtxosBox.delete(id);
|
|
if (utxo == null) return;
|
|
final addressRecord = walletAddresses.allAddresses
|
|
.firstWhere((addressRecord) => addressRecord.address == utxo.address);
|
|
if (!addresses.contains(utxo.address)) {
|
|
addresses.add(utxo.address);
|
|
}
|
|
addressRecord.balance -= utxo.value.toInt();
|
|
});
|
|
transaction.inputAddresses?.addAll(addresses);
|
|
|
|
transactionHistory.addOne(transaction);
|
|
await updateUnspent();
|
|
await updateBalance();
|
|
});
|
|
} catch (e, s) {
|
|
print(e);
|
|
print(s);
|
|
if (e.toString().contains("commit failed")) {
|
|
throw Exception("Transaction commit failed (no peers responded), please try again.");
|
|
}
|
|
rethrow;
|
|
}
|
|
}
|
|
|
|
@override
|
|
Future<void> save() async {
|
|
await super.save();
|
|
}
|
|
|
|
@override
|
|
Future<void> close() async {
|
|
await super.close();
|
|
await mwebUtxosBox.close();
|
|
_syncTimer?.cancel();
|
|
_utxoStream?.cancel();
|
|
}
|
|
|
|
void setMwebEnabled(bool enabled) {
|
|
if (mwebEnabled == enabled) {
|
|
return;
|
|
}
|
|
|
|
mwebEnabled = enabled;
|
|
stopSync();
|
|
startSync();
|
|
}
|
|
}
|