mirror of
https://github.com/cypherstack/stack_wallet.git
synced 2024-09-30 18:31:10 +00:00
1401 lines
43 KiB
Dart
1401 lines
43 KiB
Dart
import 'dart:convert';
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import 'dart:math';
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import 'dart:typed_data';
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import 'package:bip32/bip32.dart' as bip32;
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import 'package:bip47/bip47.dart';
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import 'package:bip47/src/util.dart';
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import 'package:bitcoindart/bitcoindart.dart' as btc_dart;
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import 'package:bitcoindart/src/utils/constants/op.dart' as op;
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import 'package:bitcoindart/src/utils/script.dart' as bscript;
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import 'package:isar/isar.dart';
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import 'package:pointycastle/digests/sha256.dart';
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import 'package:stackwallet/db/isar/main_db.dart';
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import 'package:stackwallet/electrumx_rpc/electrumx.dart';
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import 'package:stackwallet/exceptions/wallet/insufficient_balance_exception.dart';
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import 'package:stackwallet/exceptions/wallet/paynym_send_exception.dart';
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import 'package:stackwallet/models/isar/models/isar_models.dart';
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import 'package:stackwallet/models/signing_data.dart';
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import 'package:stackwallet/utilities/amount/amount.dart';
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import 'package:stackwallet/utilities/bip32_utils.dart';
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import 'package:stackwallet/utilities/bip47_utils.dart';
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import 'package:stackwallet/utilities/enums/coin_enum.dart';
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import 'package:stackwallet/utilities/flutter_secure_storage_interface.dart';
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import 'package:stackwallet/utilities/format.dart';
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import 'package:stackwallet/utilities/logger.dart';
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import 'package:tuple/tuple.dart';
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const String kPCodeKeyPrefix = "pCode_key_";
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String _basePaynymDerivePath({required bool testnet}) =>
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"m/47'/${testnet ? "1" : "0"}'/0'";
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String _notificationDerivationPath({required bool testnet}) =>
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"${_basePaynymDerivePath(testnet: testnet)}/0";
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String _receivingPaynymAddressDerivationPath(
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int index, {
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required bool testnet,
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}) =>
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"${_basePaynymDerivePath(testnet: testnet)}/$index/0";
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String _sendPaynymAddressDerivationPath(
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int index, {
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required bool testnet,
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}) =>
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"${_basePaynymDerivePath(testnet: testnet)}/0/$index";
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mixin PaynymWalletInterface {
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// passed in wallet data
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late final String _walletId;
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late final String _walletName;
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late final btc_dart.NetworkType _network;
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late final Coin _coin;
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late final MainDB _db;
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late final ElectrumX _electrumXClient;
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late final SecureStorageInterface _secureStorage;
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late final int _dustLimit;
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late final int _dustLimitP2PKH;
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late final int _minConfirms;
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// passed in wallet functions
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late final Future<String?> Function() _getMnemonicString;
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late final Future<String?> Function() _getMnemonicPassphrase;
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late final Future<int> Function() _getChainHeight;
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late final Future<String> Function() _getCurrentChangeAddress;
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late final int Function({
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required int vSize,
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required int feeRatePerKB,
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}) _estimateTxFee;
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late final Future<Map<String, dynamic>> Function({
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required String address,
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required Amount amount,
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Map<String, dynamic>? args,
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}) _prepareSend;
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late final Future<int> Function({
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required String address,
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}) _getTxCount;
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late final Future<List<SigningData>> Function(
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List<UTXO> utxosToUse,
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) _fetchBuildTxData;
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late final Future<void> Function() _refresh;
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late final Future<void> Function() _checkChangeAddressForTransactions;
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// initializer
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void initPaynymWalletInterface({
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required String walletId,
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required String walletName,
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required btc_dart.NetworkType network,
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required Coin coin,
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required MainDB db,
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required ElectrumX electrumXClient,
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required SecureStorageInterface secureStorage,
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required int dustLimit,
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required int dustLimitP2PKH,
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required int minConfirms,
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required Future<String?> Function() getMnemonicString,
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required Future<String?> Function() getMnemonicPassphrase,
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required Future<int> Function() getChainHeight,
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required Future<String> Function() getCurrentChangeAddress,
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required int Function({
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required int vSize,
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required int feeRatePerKB,
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})
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estimateTxFee,
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required Future<Map<String, dynamic>> Function({
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required String address,
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required Amount amount,
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Map<String, dynamic>? args,
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})
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prepareSend,
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required Future<int> Function({
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required String address,
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})
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getTxCount,
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required Future<List<SigningData>> Function(
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List<UTXO> utxosToUse,
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)
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fetchBuildTxData,
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required Future<void> Function() refresh,
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required Future<void> Function() checkChangeAddressForTransactions,
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}) {
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_walletId = walletId;
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_walletName = walletName;
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_network = network;
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_coin = coin;
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_db = db;
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_electrumXClient = electrumXClient;
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_secureStorage = secureStorage;
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_dustLimit = dustLimit;
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_dustLimitP2PKH = dustLimitP2PKH;
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_minConfirms = minConfirms;
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_getMnemonicString = getMnemonicString;
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_getMnemonicPassphrase = getMnemonicPassphrase;
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_getChainHeight = getChainHeight;
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_getCurrentChangeAddress = getCurrentChangeAddress;
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_estimateTxFee = estimateTxFee;
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_prepareSend = prepareSend;
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_getTxCount = getTxCount;
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_fetchBuildTxData = fetchBuildTxData;
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_refresh = refresh;
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_checkChangeAddressForTransactions = checkChangeAddressForTransactions;
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}
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// convenience getter
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btc_dart.NetworkType get networkType => _network;
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Future<bip32.BIP32> getBip47BaseNode() async {
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final root = await _getRootNode();
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final node = root.derivePath(
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_basePaynymDerivePath(
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testnet: _coin.isTestNet,
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),
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);
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return node;
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}
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Future<Uint8List> getPrivateKeyForPaynymReceivingAddress({
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required String paymentCodeString,
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required int index,
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}) async {
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final bip47base = await getBip47BaseNode();
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final paymentAddress = PaymentAddress(
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bip32Node: bip47base.derive(index),
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paymentCode: PaymentCode.fromPaymentCode(
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paymentCodeString,
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networkType: networkType,
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),
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networkType: networkType,
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index: 0,
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);
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final pair = paymentAddress.getReceiveAddressKeyPair();
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return pair.privateKey!;
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}
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Future<Address> currentReceivingPaynymAddress({
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required PaymentCode sender,
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required bool isSegwit,
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}) async {
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final keys = await lookupKey(sender.toString());
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final address = await _db
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.getAddresses(_walletId)
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.filter()
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.subTypeEqualTo(AddressSubType.paynymReceive)
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.and()
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.group((q) {
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if (isSegwit) {
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return q
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.typeEqualTo(AddressType.p2sh)
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.or()
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.typeEqualTo(AddressType.p2wpkh);
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} else {
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return q.typeEqualTo(AddressType.p2pkh);
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}
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})
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.and()
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.anyOf<String, Address>(keys, (q, String e) => q.otherDataEqualTo(e))
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.sortByDerivationIndexDesc()
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.findFirst();
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if (address == null) {
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final generatedAddress = await _generatePaynymReceivingAddress(
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sender: sender,
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index: 0,
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generateSegwitAddress: isSegwit,
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);
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final existing = await _db
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.getAddresses(_walletId)
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.filter()
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.valueEqualTo(generatedAddress.value)
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.findFirst();
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if (existing == null) {
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// Add that new address
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await _db.putAddress(generatedAddress);
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} else {
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// we need to update the address
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await _db.updateAddress(existing, generatedAddress);
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}
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return currentReceivingPaynymAddress(
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isSegwit: isSegwit,
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sender: sender,
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);
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} else {
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return address;
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}
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}
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Future<Address> _generatePaynymReceivingAddress({
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required PaymentCode sender,
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required int index,
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required bool generateSegwitAddress,
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}) async {
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final root = await _getRootNode();
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final node = root.derivePath(
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_basePaynymDerivePath(
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testnet: _coin.isTestNet,
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),
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);
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final paymentAddress = PaymentAddress(
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bip32Node: node.derive(index),
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paymentCode: sender,
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networkType: networkType,
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index: 0,
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);
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final addressString = generateSegwitAddress
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? paymentAddress.getReceiveAddressP2WPKH()
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: paymentAddress.getReceiveAddressP2PKH();
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final address = Address(
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walletId: _walletId,
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value: addressString,
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publicKey: [],
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derivationIndex: index,
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derivationPath: DerivationPath()
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..value = _receivingPaynymAddressDerivationPath(
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index,
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testnet: _coin.isTestNet,
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),
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type: generateSegwitAddress ? AddressType.p2wpkh : AddressType.p2pkh,
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subType: AddressSubType.paynymReceive,
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otherData: await storeCode(sender.toString()),
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);
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return address;
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}
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Future<Address> _generatePaynymSendAddress({
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required PaymentCode other,
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required int index,
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required bool generateSegwitAddress,
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bip32.BIP32? mySendBip32Node,
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}) async {
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final node = mySendBip32Node ?? await deriveNotificationBip32Node();
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final paymentAddress = PaymentAddress(
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bip32Node: node,
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paymentCode: other,
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networkType: networkType,
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index: index,
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);
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final addressString = generateSegwitAddress
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? paymentAddress.getSendAddressP2WPKH()
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: paymentAddress.getSendAddressP2PKH();
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final address = Address(
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walletId: _walletId,
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value: addressString,
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publicKey: [],
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derivationIndex: index,
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derivationPath: DerivationPath()
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..value = _sendPaynymAddressDerivationPath(
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index,
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testnet: _coin.isTestNet,
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),
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type: AddressType.nonWallet,
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subType: AddressSubType.paynymSend,
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otherData: await storeCode(other.toString()),
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);
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return address;
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}
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Future<void> checkCurrentPaynymReceivingAddressForTransactions({
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required PaymentCode sender,
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required bool isSegwit,
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}) async {
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final address = await currentReceivingPaynymAddress(
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sender: sender,
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isSegwit: isSegwit,
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);
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final txCount = await _getTxCount(address: address.value);
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if (txCount > 0) {
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// generate next address and add to db
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final nextAddress = await _generatePaynymReceivingAddress(
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sender: sender,
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index: address.derivationIndex + 1,
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generateSegwitAddress: isSegwit,
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);
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final existing = await _db
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.getAddresses(_walletId)
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.filter()
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.valueEqualTo(nextAddress.value)
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.findFirst();
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if (existing == null) {
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// Add that new address
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await _db.putAddress(nextAddress);
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} else {
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// we need to update the address
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await _db.updateAddress(existing, nextAddress);
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}
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// keep checking until address with no tx history is set as current
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await checkCurrentPaynymReceivingAddressForTransactions(
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sender: sender,
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isSegwit: isSegwit,
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);
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}
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}
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Future<void> checkAllCurrentReceivingPaynymAddressesForTransactions() async {
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final codes = await getAllPaymentCodesFromNotificationTransactions();
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final List<Future<void>> futures = [];
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for (final code in codes) {
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futures.add(checkCurrentPaynymReceivingAddressForTransactions(
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sender: code,
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isSegwit: true,
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));
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futures.add(checkCurrentPaynymReceivingAddressForTransactions(
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sender: code,
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isSegwit: false,
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));
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}
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await Future.wait(futures);
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}
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// generate bip32 payment code root
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Future<bip32.BIP32> _getRootNode() async {
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return _cachedRootNode ??= await Bip32Utils.getBip32Root(
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(await _getMnemonicString())!,
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(await _getMnemonicPassphrase())!,
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_network,
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);
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}
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bip32.BIP32? _cachedRootNode;
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Future<bip32.BIP32> deriveNotificationBip32Node() async {
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final root = await _getRootNode();
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final node = root
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.derivePath(
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_basePaynymDerivePath(
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testnet: _coin.isTestNet,
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),
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)
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.derive(0);
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return node;
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}
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/// fetch or generate this wallet's bip47 payment code
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Future<PaymentCode> getPaymentCode({
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required bool isSegwit,
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}) async {
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final node = await _getRootNode();
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final paymentCode = PaymentCode.fromBip32Node(
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node.derivePath(_basePaynymDerivePath(testnet: _coin.isTestNet)),
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networkType: networkType,
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shouldSetSegwitBit: isSegwit,
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);
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return paymentCode;
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}
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Future<Uint8List> signWithNotificationKey(Uint8List data) async {
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final myPrivateKeyNode = await deriveNotificationBip32Node();
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final pair = btc_dart.ECPair.fromPrivateKey(myPrivateKeyNode.privateKey!,
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network: _network);
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final signed = pair.sign(SHA256Digest().process(data));
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return signed;
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}
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Future<String> signStringWithNotificationKey(String data) async {
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final bytes =
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await signWithNotificationKey(Uint8List.fromList(utf8.encode(data)));
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return Format.uint8listToString(bytes);
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}
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Future<Map<String, dynamic>> preparePaymentCodeSend({
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required PaymentCode paymentCode,
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required bool isSegwit,
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required Amount amount,
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Map<String, dynamic>? args,
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}) async {
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if (!(await hasConnected(paymentCode.toString()))) {
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throw PaynymSendException(
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"No notification transaction sent to $paymentCode");
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} else {
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final myPrivateKeyNode = await deriveNotificationBip32Node();
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final sendToAddress = await nextUnusedSendAddressFrom(
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pCode: paymentCode,
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privateKeyNode: myPrivateKeyNode,
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isSegwit: isSegwit,
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);
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return _prepareSend(
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address: sendToAddress.value,
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amount: amount,
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args: args,
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);
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}
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}
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/// get the next unused address to send to given the receiver's payment code
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/// and your own private key
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Future<Address> nextUnusedSendAddressFrom({
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required PaymentCode pCode,
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required bool isSegwit,
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required bip32.BIP32 privateKeyNode,
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int startIndex = 0,
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}) async {
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// https://en.bitcoin.it/wiki/BIP_0047#Path_levels
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const maxCount = 2147483647;
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for (int i = startIndex; i < maxCount; i++) {
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final keys = await lookupKey(pCode.toString());
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final address = await _db
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.getAddresses(_walletId)
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.filter()
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.subTypeEqualTo(AddressSubType.paynymSend)
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.and()
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.anyOf<String, Address>(keys, (q, String e) => q.otherDataEqualTo(e))
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.and()
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.derivationIndexEqualTo(i)
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.findFirst();
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if (address != null) {
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final count = await _getTxCount(address: address.value);
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// return address if unused, otherwise continue to next index
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if (count == 0) {
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return address;
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}
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} else {
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final address = await _generatePaynymSendAddress(
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other: pCode,
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index: i,
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generateSegwitAddress: isSegwit,
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mySendBip32Node: privateKeyNode,
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);
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final storedAddress = await _db.getAddress(_walletId, address.value);
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if (storedAddress == null) {
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await _db.putAddress(address);
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} else {
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await _db.updateAddress(storedAddress, address);
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}
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final count = await _getTxCount(address: address.value);
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// return address if unused, otherwise continue to next index
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if (count == 0) {
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return address;
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}
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}
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}
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throw PaynymSendException("Exhausted unused send addresses!");
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}
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|
|
Future<Map<String, dynamic>> prepareNotificationTx({
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required int selectedTxFeeRate,
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required String targetPaymentCodeString,
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int additionalOutputs = 0,
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List<UTXO>? utxos,
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}) async {
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try {
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final amountToSend = _dustLimitP2PKH;
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final List<UTXO> availableOutputs =
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utxos ?? await _db.getUTXOs(_walletId).findAll();
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final List<UTXO> spendableOutputs = [];
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int spendableSatoshiValue = 0;
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|
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// Build list of spendable outputs and totaling their satoshi amount
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for (var i = 0; i < availableOutputs.length; i++) {
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if (availableOutputs[i].isBlocked == false &&
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availableOutputs[i]
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.isConfirmed(await _getChainHeight(), _minConfirms) ==
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true) {
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spendableOutputs.add(availableOutputs[i]);
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spendableSatoshiValue += availableOutputs[i].value;
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}
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}
|
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|
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if (spendableSatoshiValue < amountToSend) {
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// insufficient balance
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throw InsufficientBalanceException(
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"Spendable balance is less than the minimum required for a notification transaction.");
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} else if (spendableSatoshiValue == amountToSend) {
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// insufficient balance due to missing amount to cover fee
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throw InsufficientBalanceException(
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"Remaining balance does not cover the network fee.");
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|
}
|
|
|
|
// sort spendable by age (oldest first)
|
|
spendableOutputs.sort((a, b) => b.blockTime!.compareTo(a.blockTime!));
|
|
|
|
int satoshisBeingUsed = 0;
|
|
int outputsBeingUsed = 0;
|
|
List<UTXO> utxoObjectsToUse = [];
|
|
|
|
for (int i = 0;
|
|
satoshisBeingUsed < amountToSend && i < spendableOutputs.length;
|
|
i++) {
|
|
utxoObjectsToUse.add(spendableOutputs[i]);
|
|
satoshisBeingUsed += spendableOutputs[i].value;
|
|
outputsBeingUsed += 1;
|
|
}
|
|
|
|
// add additional outputs if required
|
|
for (int i = 0;
|
|
i < additionalOutputs && outputsBeingUsed < spendableOutputs.length;
|
|
i++) {
|
|
utxoObjectsToUse.add(spendableOutputs[outputsBeingUsed]);
|
|
satoshisBeingUsed += spendableOutputs[outputsBeingUsed].value;
|
|
outputsBeingUsed += 1;
|
|
}
|
|
|
|
// gather required signing data
|
|
final utxoSigningData = await _fetchBuildTxData(utxoObjectsToUse);
|
|
|
|
final int vSizeForNoChange = (await _createNotificationTx(
|
|
targetPaymentCodeString: targetPaymentCodeString,
|
|
utxoSigningData: utxoSigningData,
|
|
change: 0,
|
|
// override amount to get around absurd fees error
|
|
overrideAmountForTesting: satoshisBeingUsed,
|
|
))
|
|
.item2;
|
|
|
|
final int vSizeForWithChange = (await _createNotificationTx(
|
|
targetPaymentCodeString: targetPaymentCodeString,
|
|
utxoSigningData: utxoSigningData,
|
|
change: satoshisBeingUsed - amountToSend,
|
|
))
|
|
.item2;
|
|
|
|
// Assume 2 outputs, for recipient and payment code script
|
|
int feeForNoChange = _estimateTxFee(
|
|
vSize: vSizeForNoChange,
|
|
feeRatePerKB: selectedTxFeeRate,
|
|
);
|
|
|
|
// Assume 3 outputs, for recipient, payment code script, and change
|
|
int feeForWithChange = _estimateTxFee(
|
|
vSize: vSizeForWithChange,
|
|
feeRatePerKB: selectedTxFeeRate,
|
|
);
|
|
|
|
if (_coin == Coin.dogecoin || _coin == Coin.dogecoinTestNet) {
|
|
if (feeForNoChange < vSizeForNoChange * 1000) {
|
|
feeForNoChange = vSizeForNoChange * 1000;
|
|
}
|
|
if (feeForWithChange < vSizeForWithChange * 1000) {
|
|
feeForWithChange = vSizeForWithChange * 1000;
|
|
}
|
|
}
|
|
|
|
if (satoshisBeingUsed - amountToSend > feeForNoChange + _dustLimitP2PKH) {
|
|
// try to add change output due to "left over" amount being greater than
|
|
// the estimated fee + the dust limit
|
|
int changeAmount = satoshisBeingUsed - amountToSend - feeForWithChange;
|
|
|
|
// check estimates are correct and build notification tx
|
|
if (changeAmount >= _dustLimitP2PKH &&
|
|
satoshisBeingUsed - amountToSend - changeAmount ==
|
|
feeForWithChange) {
|
|
var txn = await _createNotificationTx(
|
|
targetPaymentCodeString: targetPaymentCodeString,
|
|
utxoSigningData: utxoSigningData,
|
|
change: changeAmount,
|
|
);
|
|
|
|
int feeBeingPaid = satoshisBeingUsed - amountToSend - changeAmount;
|
|
|
|
// make sure minimum fee is accurate if that is being used
|
|
if (txn.item2 - feeBeingPaid == 1) {
|
|
changeAmount -= 1;
|
|
feeBeingPaid += 1;
|
|
txn = await _createNotificationTx(
|
|
targetPaymentCodeString: targetPaymentCodeString,
|
|
utxoSigningData: utxoSigningData,
|
|
change: changeAmount,
|
|
);
|
|
}
|
|
|
|
Map<String, dynamic> transactionObject = {
|
|
"hex": txn.item1,
|
|
"recipientPaynym": targetPaymentCodeString,
|
|
"amount": amountToSend.toAmountAsRaw(
|
|
fractionDigits: _coin.decimals,
|
|
),
|
|
"fee": feeBeingPaid,
|
|
"vSize": txn.item2,
|
|
"usedUTXOs": utxoSigningData.map((e) => e.utxo).toList(),
|
|
};
|
|
return transactionObject;
|
|
} else {
|
|
// something broke during fee estimation or the change amount is smaller
|
|
// than the dust limit. Try without change
|
|
final txn = await _createNotificationTx(
|
|
targetPaymentCodeString: targetPaymentCodeString,
|
|
utxoSigningData: utxoSigningData,
|
|
change: 0,
|
|
);
|
|
|
|
int feeBeingPaid = satoshisBeingUsed - amountToSend;
|
|
|
|
Map<String, dynamic> transactionObject = {
|
|
"hex": txn.item1,
|
|
"recipientPaynym": targetPaymentCodeString,
|
|
"amount":
|
|
amountToSend.toAmountAsRaw(fractionDigits: _coin.decimals),
|
|
"fee": feeBeingPaid,
|
|
"vSize": txn.item2,
|
|
"usedUTXOs": utxoSigningData.map((e) => e.utxo).toList(),
|
|
};
|
|
return transactionObject;
|
|
}
|
|
} else if (satoshisBeingUsed - amountToSend >= feeForNoChange) {
|
|
// since we already checked if we need to add a change output we can just
|
|
// build without change here
|
|
final txn = await _createNotificationTx(
|
|
targetPaymentCodeString: targetPaymentCodeString,
|
|
utxoSigningData: utxoSigningData,
|
|
change: 0,
|
|
);
|
|
|
|
int feeBeingPaid = satoshisBeingUsed - amountToSend;
|
|
|
|
Map<String, dynamic> transactionObject = {
|
|
"hex": txn.item1,
|
|
"recipientPaynym": targetPaymentCodeString,
|
|
"amount": amountToSend.toAmountAsRaw(fractionDigits: _coin.decimals),
|
|
"fee": feeBeingPaid,
|
|
"vSize": txn.item2,
|
|
"usedUTXOs": utxoSigningData.map((e) => e.utxo).toList(),
|
|
};
|
|
return transactionObject;
|
|
} else {
|
|
// if we get here we do not have enough funds to cover the tx total so we
|
|
// check if we have any more available outputs and try again
|
|
if (spendableOutputs.length > outputsBeingUsed) {
|
|
return prepareNotificationTx(
|
|
selectedTxFeeRate: selectedTxFeeRate,
|
|
targetPaymentCodeString: targetPaymentCodeString,
|
|
additionalOutputs: additionalOutputs + 1,
|
|
);
|
|
} else {
|
|
throw InsufficientBalanceException(
|
|
"Remaining balance does not cover the network fee.");
|
|
}
|
|
}
|
|
} catch (e) {
|
|
rethrow;
|
|
}
|
|
}
|
|
|
|
// return tuple with string value equal to the raw tx hex and the int value
|
|
// equal to its vSize
|
|
Future<Tuple2<String, int>> _createNotificationTx({
|
|
required String targetPaymentCodeString,
|
|
required List<SigningData> utxoSigningData,
|
|
required int change,
|
|
int? overrideAmountForTesting,
|
|
}) async {
|
|
try {
|
|
final targetPaymentCode = PaymentCode.fromPaymentCode(
|
|
targetPaymentCodeString,
|
|
networkType: _network,
|
|
);
|
|
final myCode = await getPaymentCode(isSegwit: false);
|
|
|
|
final utxo = utxoSigningData.first.utxo;
|
|
final txPoint = utxo.txid.fromHex.reversed.toList();
|
|
final txPointIndex = utxo.vout;
|
|
|
|
final rev = Uint8List(txPoint.length + 4);
|
|
Util.copyBytes(Uint8List.fromList(txPoint), 0, rev, 0, txPoint.length);
|
|
final buffer = rev.buffer.asByteData();
|
|
buffer.setUint32(txPoint.length, txPointIndex, Endian.little);
|
|
|
|
final myKeyPair = utxoSigningData.first.keyPair!;
|
|
|
|
final S = SecretPoint(
|
|
myKeyPair.privateKey!,
|
|
targetPaymentCode.notificationPublicKey(),
|
|
);
|
|
|
|
final blindingMask = PaymentCode.getMask(S.ecdhSecret(), rev);
|
|
|
|
final blindedPaymentCode = PaymentCode.blind(
|
|
payload: myCode.getPayload(),
|
|
mask: blindingMask,
|
|
unBlind: false,
|
|
);
|
|
|
|
final opReturnScript = bscript.compile([
|
|
(op.OPS["OP_RETURN"] as int),
|
|
blindedPaymentCode,
|
|
]);
|
|
|
|
// build a notification tx
|
|
final txb = btc_dart.TransactionBuilder(network: _network);
|
|
txb.setVersion(1);
|
|
|
|
txb.addInput(
|
|
utxo.txid,
|
|
txPointIndex,
|
|
null,
|
|
utxoSigningData.first.output!,
|
|
);
|
|
|
|
// add rest of possible inputs
|
|
for (var i = 1; i < utxoSigningData.length; i++) {
|
|
final utxo = utxoSigningData[i].utxo;
|
|
txb.addInput(
|
|
utxo.txid,
|
|
utxo.vout,
|
|
null,
|
|
utxoSigningData[i].output!,
|
|
);
|
|
}
|
|
final String notificationAddress =
|
|
targetPaymentCode.notificationAddressP2PKH();
|
|
|
|
txb.addOutput(
|
|
notificationAddress,
|
|
overrideAmountForTesting ?? _dustLimitP2PKH,
|
|
);
|
|
txb.addOutput(opReturnScript, 0);
|
|
|
|
// TODO: add possible change output and mark output as dangerous
|
|
if (change > 0) {
|
|
// generate new change address if current change address has been used
|
|
await _checkChangeAddressForTransactions();
|
|
final String changeAddress = await _getCurrentChangeAddress();
|
|
txb.addOutput(changeAddress, change);
|
|
}
|
|
|
|
txb.sign(
|
|
vin: 0,
|
|
keyPair: myKeyPair,
|
|
witnessValue: utxo.value,
|
|
witnessScript: utxoSigningData.first.redeemScript,
|
|
);
|
|
|
|
// sign rest of possible inputs
|
|
for (var i = 1; i < utxoSigningData.length; i++) {
|
|
txb.sign(
|
|
vin: i,
|
|
keyPair: utxoSigningData[i].keyPair!,
|
|
witnessValue: utxoSigningData[i].utxo.value,
|
|
witnessScript: utxoSigningData[i].redeemScript,
|
|
);
|
|
}
|
|
|
|
final builtTx = txb.build();
|
|
|
|
return Tuple2(builtTx.toHex(), builtTx.virtualSize());
|
|
} catch (e, s) {
|
|
Logging.instance.log(
|
|
"_createNotificationTx(): $e\n$s",
|
|
level: LogLevel.Error,
|
|
);
|
|
rethrow;
|
|
}
|
|
}
|
|
|
|
Future<String> broadcastNotificationTx({
|
|
required Map<String, dynamic> preparedTx,
|
|
}) async {
|
|
try {
|
|
Logging.instance.log("confirmNotificationTx txData: $preparedTx",
|
|
level: LogLevel.Info);
|
|
final txHash = await _electrumXClient.broadcastTransaction(
|
|
rawTx: preparedTx["hex"] as String);
|
|
Logging.instance.log("Sent txHash: $txHash", level: LogLevel.Info);
|
|
|
|
// TODO: only refresh transaction data
|
|
try {
|
|
await _refresh();
|
|
} catch (e) {
|
|
Logging.instance.log(
|
|
"refresh() failed in confirmNotificationTx ($_walletName::$_walletId): $e",
|
|
level: LogLevel.Error,
|
|
);
|
|
}
|
|
|
|
return txHash;
|
|
} catch (e, s) {
|
|
Logging.instance.log("Exception rethrown from confirmSend(): $e\n$s",
|
|
level: LogLevel.Error);
|
|
rethrow;
|
|
}
|
|
}
|
|
|
|
// Future<bool?> _checkHasConnectedCache(String paymentCodeString) async {
|
|
// final value = await _secureStorage.read(
|
|
// key: "$_connectedKeyPrefix$paymentCodeString");
|
|
// if (value == null) {
|
|
// return null;
|
|
// } else {
|
|
// final int rawBool = int.parse(value);
|
|
// return rawBool > 0;
|
|
// }
|
|
// }
|
|
//
|
|
// Future<void> _setConnectedCache(
|
|
// String paymentCodeString, bool hasConnected) async {
|
|
// await _secureStorage.write(
|
|
// key: "$_connectedKeyPrefix$paymentCodeString",
|
|
// value: hasConnected ? "1" : "0");
|
|
// }
|
|
|
|
// TODO optimize
|
|
Future<bool> hasConnected(String paymentCodeString) async {
|
|
// final didConnect = await _checkHasConnectedCache(paymentCodeString);
|
|
// if (didConnect == true) {
|
|
// return true;
|
|
// }
|
|
//
|
|
// final keys = await lookupKey(paymentCodeString);
|
|
//
|
|
// final tx = await _db
|
|
// .getTransactions(_walletId)
|
|
// .filter()
|
|
// .subTypeEqualTo(TransactionSubType.bip47Notification).and()
|
|
// .address((q) =>
|
|
// q.anyOf<String, Transaction>(keys, (q, e) => q.otherDataEqualTo(e)))
|
|
// .findAll();
|
|
|
|
final myNotificationAddress = await getMyNotificationAddress();
|
|
|
|
final txns = await _db
|
|
.getTransactions(_walletId)
|
|
.filter()
|
|
.subTypeEqualTo(TransactionSubType.bip47Notification)
|
|
.findAll();
|
|
|
|
for (final tx in txns) {
|
|
if (tx.type == TransactionType.incoming &&
|
|
tx.address.value?.value == myNotificationAddress.value) {
|
|
final unBlindedPaymentCode = await unBlindedPaymentCodeFromTransaction(
|
|
transaction: tx,
|
|
);
|
|
|
|
if (unBlindedPaymentCode != null &&
|
|
paymentCodeString == unBlindedPaymentCode.toString()) {
|
|
// await _setConnectedCache(paymentCodeString, true);
|
|
return true;
|
|
}
|
|
|
|
final unBlindedPaymentCodeBad =
|
|
await unBlindedPaymentCodeFromTransactionBad(
|
|
transaction: tx,
|
|
);
|
|
|
|
if (unBlindedPaymentCodeBad != null &&
|
|
paymentCodeString == unBlindedPaymentCodeBad.toString()) {
|
|
// await _setConnectedCache(paymentCodeString, true);
|
|
return true;
|
|
}
|
|
} else if (tx.type == TransactionType.outgoing) {
|
|
if (tx.address.value?.otherData != null) {
|
|
final code =
|
|
await paymentCodeStringByKey(tx.address.value!.otherData!);
|
|
if (code == paymentCodeString) {
|
|
// await _setConnectedCache(paymentCodeString, true);
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// otherwise return no
|
|
// await _setConnectedCache(paymentCodeString, false);
|
|
return false;
|
|
}
|
|
|
|
Uint8List? _pubKeyFromInput(Input input) {
|
|
final scriptSigComponents = input.scriptSigAsm?.split(" ") ?? [];
|
|
if (scriptSigComponents.length > 1) {
|
|
return scriptSigComponents[1].fromHex;
|
|
}
|
|
if (input.witness != null) {
|
|
try {
|
|
final witnessComponents = jsonDecode(input.witness!) as List;
|
|
if (witnessComponents.length == 2) {
|
|
return (witnessComponents[1] as String).fromHex;
|
|
}
|
|
} catch (_) {
|
|
//
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
Future<PaymentCode?> unBlindedPaymentCodeFromTransaction({
|
|
required Transaction transaction,
|
|
}) async {
|
|
try {
|
|
final blindedCodeBytes =
|
|
Bip47Utils.getBlindedPaymentCodeBytesFrom(transaction);
|
|
|
|
// transaction does not contain a payment code
|
|
if (blindedCodeBytes == null) {
|
|
return null;
|
|
}
|
|
|
|
final designatedInput = transaction.inputs.first;
|
|
|
|
final txPoint = designatedInput.txid.fromHex.reversed.toList();
|
|
final txPointIndex = designatedInput.vout;
|
|
|
|
final rev = Uint8List(txPoint.length + 4);
|
|
Util.copyBytes(Uint8List.fromList(txPoint), 0, rev, 0, txPoint.length);
|
|
final buffer = rev.buffer.asByteData();
|
|
buffer.setUint32(txPoint.length, txPointIndex, Endian.little);
|
|
|
|
final pubKey = _pubKeyFromInput(designatedInput)!;
|
|
|
|
final myPrivateKey = (await deriveNotificationBip32Node()).privateKey!;
|
|
|
|
final S = SecretPoint(myPrivateKey, pubKey);
|
|
|
|
final mask = PaymentCode.getMask(S.ecdhSecret(), rev);
|
|
|
|
final unBlindedPayload = PaymentCode.blind(
|
|
payload: blindedCodeBytes,
|
|
mask: mask,
|
|
unBlind: true,
|
|
);
|
|
|
|
final unBlindedPaymentCode = PaymentCode.fromPayload(
|
|
unBlindedPayload,
|
|
networkType: _network,
|
|
);
|
|
|
|
return unBlindedPaymentCode;
|
|
} catch (e) {
|
|
Logging.instance.log(
|
|
"unBlindedPaymentCodeFromTransaction() failed: $e\nFor tx: $transaction",
|
|
level: LogLevel.Warning,
|
|
);
|
|
return null;
|
|
}
|
|
}
|
|
|
|
Future<PaymentCode?> unBlindedPaymentCodeFromTransactionBad({
|
|
required Transaction transaction,
|
|
}) async {
|
|
try {
|
|
final blindedCodeBytes =
|
|
Bip47Utils.getBlindedPaymentCodeBytesFrom(transaction);
|
|
|
|
// transaction does not contain a payment code
|
|
if (blindedCodeBytes == null) {
|
|
return null;
|
|
}
|
|
|
|
final designatedInput = transaction.inputs.first;
|
|
|
|
final txPoint = designatedInput.txid.fromHex.toList();
|
|
final txPointIndex = designatedInput.vout;
|
|
|
|
final rev = Uint8List(txPoint.length + 4);
|
|
Util.copyBytes(Uint8List.fromList(txPoint), 0, rev, 0, txPoint.length);
|
|
final buffer = rev.buffer.asByteData();
|
|
buffer.setUint32(txPoint.length, txPointIndex, Endian.little);
|
|
|
|
final pubKey = _pubKeyFromInput(designatedInput)!;
|
|
|
|
final myPrivateKey = (await deriveNotificationBip32Node()).privateKey!;
|
|
|
|
final S = SecretPoint(myPrivateKey, pubKey);
|
|
|
|
final mask = PaymentCode.getMask(S.ecdhSecret(), rev);
|
|
|
|
final unBlindedPayload = PaymentCode.blind(
|
|
payload: blindedCodeBytes,
|
|
mask: mask,
|
|
unBlind: true,
|
|
);
|
|
|
|
final unBlindedPaymentCode = PaymentCode.fromPayload(
|
|
unBlindedPayload,
|
|
networkType: _network,
|
|
);
|
|
|
|
return unBlindedPaymentCode;
|
|
} catch (e) {
|
|
Logging.instance.log(
|
|
"unBlindedPaymentCodeFromTransactionBad() failed: $e\nFor tx: $transaction",
|
|
level: LogLevel.Warning,
|
|
);
|
|
return null;
|
|
}
|
|
}
|
|
|
|
Future<List<PaymentCode>>
|
|
getAllPaymentCodesFromNotificationTransactions() async {
|
|
final txns = await _db
|
|
.getTransactions(_walletId)
|
|
.filter()
|
|
.subTypeEqualTo(TransactionSubType.bip47Notification)
|
|
.findAll();
|
|
|
|
List<PaymentCode> codes = [];
|
|
|
|
for (final tx in txns) {
|
|
// tx is sent so we can check the address's otherData for the code String
|
|
if (tx.type == TransactionType.outgoing &&
|
|
tx.address.value?.otherData != null) {
|
|
final codeString =
|
|
await paymentCodeStringByKey(tx.address.value!.otherData!);
|
|
if (codeString != null &&
|
|
codes.where((e) => e.toString() == codeString).isEmpty) {
|
|
codes.add(
|
|
PaymentCode.fromPaymentCode(
|
|
codeString,
|
|
networkType: _network,
|
|
),
|
|
);
|
|
}
|
|
} else {
|
|
// otherwise we need to un blind the code
|
|
final unBlinded = await unBlindedPaymentCodeFromTransaction(
|
|
transaction: tx,
|
|
);
|
|
if (unBlinded != null &&
|
|
codes.where((e) => e.toString() == unBlinded.toString()).isEmpty) {
|
|
codes.add(unBlinded);
|
|
}
|
|
|
|
final unBlindedBad = await unBlindedPaymentCodeFromTransactionBad(
|
|
transaction: tx,
|
|
);
|
|
if (unBlindedBad != null &&
|
|
codes
|
|
.where((e) => e.toString() == unBlindedBad.toString())
|
|
.isEmpty) {
|
|
codes.add(unBlindedBad);
|
|
}
|
|
}
|
|
}
|
|
|
|
return codes;
|
|
}
|
|
|
|
Future<void> checkForNotificationTransactionsTo(
|
|
Set<String> otherCodeStrings) async {
|
|
final sentNotificationTransactions = await _db
|
|
.getTransactions(_walletId)
|
|
.filter()
|
|
.subTypeEqualTo(TransactionSubType.bip47Notification)
|
|
.and()
|
|
.typeEqualTo(TransactionType.outgoing)
|
|
.findAll();
|
|
|
|
final List<PaymentCode> codes = [];
|
|
for (final codeString in otherCodeStrings) {
|
|
codes.add(PaymentCode.fromPaymentCode(codeString, networkType: _network));
|
|
}
|
|
|
|
for (final tx in sentNotificationTransactions) {
|
|
if (tx.address.value != null && tx.address.value!.otherData == null) {
|
|
final oldAddress =
|
|
await _db.getAddress(_walletId, tx.address.value!.value);
|
|
for (final code in codes) {
|
|
final notificationAddress = code.notificationAddressP2PKH();
|
|
if (notificationAddress == oldAddress!.value) {
|
|
final address = Address(
|
|
walletId: _walletId,
|
|
value: notificationAddress,
|
|
publicKey: [],
|
|
derivationIndex: 0,
|
|
derivationPath: oldAddress.derivationPath,
|
|
type: oldAddress.type,
|
|
subType: AddressSubType.paynymNotification,
|
|
otherData: await storeCode(code.toString()),
|
|
);
|
|
await _db.updateAddress(oldAddress, address);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
Future<void> restoreAllHistory({
|
|
required int maxUnusedAddressGap,
|
|
required int maxNumberOfIndexesToCheck,
|
|
required Set<String> paymentCodeStrings,
|
|
}) async {
|
|
final codes = await getAllPaymentCodesFromNotificationTransactions();
|
|
final List<PaymentCode> extraCodes = [];
|
|
for (final codeString in paymentCodeStrings) {
|
|
if (codes.where((e) => e.toString() == codeString).isEmpty) {
|
|
final extraCode = PaymentCode.fromPaymentCode(
|
|
codeString,
|
|
networkType: _network,
|
|
);
|
|
if (extraCode.isValid()) {
|
|
extraCodes.add(extraCode);
|
|
}
|
|
}
|
|
}
|
|
|
|
codes.addAll(extraCodes);
|
|
|
|
final List<Future<void>> futures = [];
|
|
for (final code in codes) {
|
|
futures.add(
|
|
restoreHistoryWith(
|
|
other: code,
|
|
maxUnusedAddressGap: maxUnusedAddressGap,
|
|
maxNumberOfIndexesToCheck: maxNumberOfIndexesToCheck,
|
|
checkSegwitAsWell: code.isSegWitEnabled(),
|
|
),
|
|
);
|
|
}
|
|
|
|
await Future.wait(futures);
|
|
}
|
|
|
|
Future<void> restoreHistoryWith({
|
|
required PaymentCode other,
|
|
required bool checkSegwitAsWell,
|
|
required int maxUnusedAddressGap,
|
|
required int maxNumberOfIndexesToCheck,
|
|
}) async {
|
|
// https://en.bitcoin.it/wiki/BIP_0047#Path_levels
|
|
const maxCount = 2147483647;
|
|
assert(maxNumberOfIndexesToCheck < maxCount);
|
|
|
|
final mySendBip32Node = await deriveNotificationBip32Node();
|
|
|
|
List<Address> addresses = [];
|
|
int receivingGapCounter = 0;
|
|
int outgoingGapCounter = 0;
|
|
|
|
// non segwit receiving
|
|
for (int i = 0;
|
|
i < maxNumberOfIndexesToCheck &&
|
|
receivingGapCounter < maxUnusedAddressGap;
|
|
i++) {
|
|
if (receivingGapCounter < maxUnusedAddressGap) {
|
|
final address = await _generatePaynymReceivingAddress(
|
|
sender: other,
|
|
index: i,
|
|
generateSegwitAddress: false,
|
|
);
|
|
|
|
addresses.add(address);
|
|
|
|
final count = await _getTxCount(address: address.value);
|
|
|
|
if (count > 0) {
|
|
receivingGapCounter = 0;
|
|
} else {
|
|
receivingGapCounter++;
|
|
}
|
|
}
|
|
}
|
|
|
|
// non segwit sends
|
|
for (int i = 0;
|
|
i < maxNumberOfIndexesToCheck &&
|
|
outgoingGapCounter < maxUnusedAddressGap;
|
|
i++) {
|
|
if (outgoingGapCounter < maxUnusedAddressGap) {
|
|
final address = await _generatePaynymSendAddress(
|
|
other: other,
|
|
index: i,
|
|
generateSegwitAddress: false,
|
|
mySendBip32Node: mySendBip32Node,
|
|
);
|
|
|
|
addresses.add(address);
|
|
|
|
final count = await _getTxCount(address: address.value);
|
|
|
|
if (count > 0) {
|
|
outgoingGapCounter = 0;
|
|
} else {
|
|
outgoingGapCounter++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (checkSegwitAsWell) {
|
|
int receivingGapCounterSegwit = 0;
|
|
int outgoingGapCounterSegwit = 0;
|
|
// segwit receiving
|
|
for (int i = 0;
|
|
i < maxNumberOfIndexesToCheck &&
|
|
receivingGapCounterSegwit < maxUnusedAddressGap;
|
|
i++) {
|
|
if (receivingGapCounterSegwit < maxUnusedAddressGap) {
|
|
final address = await _generatePaynymReceivingAddress(
|
|
sender: other,
|
|
index: i,
|
|
generateSegwitAddress: true,
|
|
);
|
|
|
|
addresses.add(address);
|
|
|
|
final count = await _getTxCount(address: address.value);
|
|
|
|
if (count > 0) {
|
|
receivingGapCounterSegwit = 0;
|
|
} else {
|
|
receivingGapCounterSegwit++;
|
|
}
|
|
}
|
|
}
|
|
|
|
// segwit sends
|
|
for (int i = 0;
|
|
i < maxNumberOfIndexesToCheck &&
|
|
outgoingGapCounterSegwit < maxUnusedAddressGap;
|
|
i++) {
|
|
if (outgoingGapCounterSegwit < maxUnusedAddressGap) {
|
|
final address = await _generatePaynymSendAddress(
|
|
other: other,
|
|
index: i,
|
|
generateSegwitAddress: true,
|
|
mySendBip32Node: mySendBip32Node,
|
|
);
|
|
|
|
addresses.add(address);
|
|
|
|
final count = await _getTxCount(address: address.value);
|
|
|
|
if (count > 0) {
|
|
outgoingGapCounterSegwit = 0;
|
|
} else {
|
|
outgoingGapCounterSegwit++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
await _db.updateOrPutAddresses(addresses);
|
|
}
|
|
|
|
Future<Address> getMyNotificationAddress() async {
|
|
final storedAddress = await _db
|
|
.getAddresses(_walletId)
|
|
.filter()
|
|
.subTypeEqualTo(AddressSubType.paynymNotification)
|
|
.and()
|
|
.typeEqualTo(AddressType.p2pkh)
|
|
.and()
|
|
.not()
|
|
.typeEqualTo(AddressType.nonWallet)
|
|
.findFirst();
|
|
|
|
if (storedAddress != null) {
|
|
return storedAddress;
|
|
} else {
|
|
final root = await _getRootNode();
|
|
final node = root.derivePath(
|
|
_basePaynymDerivePath(
|
|
testnet: _coin.isTestNet,
|
|
),
|
|
);
|
|
final paymentCode = PaymentCode.fromBip32Node(
|
|
node,
|
|
networkType: _network,
|
|
shouldSetSegwitBit: false,
|
|
);
|
|
|
|
final data = btc_dart.PaymentData(
|
|
pubkey: paymentCode.notificationPublicKey(),
|
|
);
|
|
|
|
final addressString = btc_dart
|
|
.P2PKH(
|
|
data: data,
|
|
network: _network,
|
|
)
|
|
.data
|
|
.address!;
|
|
|
|
Address address = Address(
|
|
walletId: _walletId,
|
|
value: addressString,
|
|
publicKey: paymentCode.getPubKey(),
|
|
derivationIndex: 0,
|
|
derivationPath: DerivationPath()
|
|
..value = _notificationDerivationPath(
|
|
testnet: _coin.isTestNet,
|
|
),
|
|
type: AddressType.p2pkh,
|
|
subType: AddressSubType.paynymNotification,
|
|
otherData: await storeCode(paymentCode.toString()),
|
|
);
|
|
|
|
// check against possible race condition. Ff this function was called
|
|
// multiple times an address could've been saved after the check at the
|
|
// beginning to see if there already was notification address. This would
|
|
// lead to a Unique Index violation error
|
|
await _db.isar.writeTxn(() async {
|
|
final storedAddress = await _db
|
|
.getAddresses(_walletId)
|
|
.filter()
|
|
.subTypeEqualTo(AddressSubType.paynymNotification)
|
|
.and()
|
|
.typeEqualTo(AddressType.p2pkh)
|
|
.and()
|
|
.not()
|
|
.typeEqualTo(AddressType.nonWallet)
|
|
.findFirst();
|
|
|
|
if (storedAddress == null) {
|
|
await _db.isar.addresses.put(address);
|
|
} else {
|
|
address = storedAddress;
|
|
}
|
|
});
|
|
|
|
return address;
|
|
}
|
|
}
|
|
|
|
/// look up a key that corresponds to a payment code string
|
|
Future<List<String>> lookupKey(String paymentCodeString) async {
|
|
final keys =
|
|
(await _secureStorage.keys).where((e) => e.startsWith(kPCodeKeyPrefix));
|
|
final List<String> result = [];
|
|
for (final key in keys) {
|
|
final value = await _secureStorage.read(key: key);
|
|
if (value == paymentCodeString) {
|
|
result.add(key);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/// fetch a payment code string
|
|
Future<String?> paymentCodeStringByKey(String key) async {
|
|
final value = await _secureStorage.read(key: key);
|
|
return value;
|
|
}
|
|
|
|
/// store payment code string and return the generated key used
|
|
Future<String> storeCode(String paymentCodeString) async {
|
|
final key = _generateKey();
|
|
await _secureStorage.write(key: key, value: paymentCodeString);
|
|
return key;
|
|
}
|
|
|
|
/// generate a new payment code string storage key
|
|
String _generateKey() {
|
|
final bytes = _randomBytes(24);
|
|
return "$kPCodeKeyPrefix${bytes.toHex}";
|
|
}
|
|
|
|
// https://github.com/AaronFeickert/stack_wallet_backup/blob/master/lib/secure_storage.dart#L307-L311
|
|
/// Generate cryptographically-secure random bytes
|
|
Uint8List _randomBytes(int n) {
|
|
final Random rng = Random.secure();
|
|
return Uint8List.fromList(
|
|
List<int>.generate(n, (_) => rng.nextInt(0xFF + 1)));
|
|
}
|
|
}
|