mirror of
https://github.com/cypherstack/stack_wallet.git
synced 2024-09-30 18:31:10 +00:00
728 lines
22 KiB
Dart
728 lines
22 KiB
Dart
import 'dart:convert';
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import 'package:bip47/src/util.dart';
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import 'package:decimal/decimal.dart';
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import 'package:isar/isar.dart';
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import 'package:stackwallet/electrumx_rpc/cached_electrumx.dart';
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import 'package:stackwallet/electrumx_rpc/electrumx.dart';
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import 'package:stackwallet/models/isar/models/isar_models.dart';
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import 'package:stackwallet/models/paymint/fee_object_model.dart';
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import 'package:stackwallet/services/mixins/paynym_wallet_interface.dart';
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import 'package:stackwallet/utilities/amount/amount.dart';
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import 'package:stackwallet/utilities/enums/coin_enum.dart';
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import 'package:stackwallet/utilities/logger.dart';
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import 'package:stackwallet/wallets/wallet/intermediate/bip39_hd_wallet.dart';
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import 'package:uuid/uuid.dart';
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mixin ElectrumXMixin on Bip39HDWallet {
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late ElectrumX electrumX;
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late CachedElectrumX electrumXCached;
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Future<int> fetchChainHeight() async {
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try {
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final result = await electrumX.getBlockHeadTip();
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return result["height"] as int;
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} catch (e) {
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rethrow;
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}
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}
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Future<int> fetchTxCount({required String addressScriptHash}) async {
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final transactions =
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await electrumX.getHistory(scripthash: addressScriptHash);
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return transactions.length;
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}
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Future<List<({Transaction transaction, Address address})>>
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fetchTransactionsV1({
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required List<Address> addresses,
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required int currentChainHeight,
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}) async {
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final List<({String txHash, int height, String address})> allTxHashes =
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(await fetchHistory(addresses.map((e) => e.value).toList()))
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.map(
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(e) => (
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txHash: e["tx_hash"] as String,
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height: e["height"] as int,
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address: e["address"] as String,
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),
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)
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.toList();
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List<Map<String, dynamic>> allTransactions = [];
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for (final data in allTxHashes) {
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final tx = await electrumXCached.getTransaction(
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txHash: data.txHash,
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verbose: true,
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coin: cryptoCurrency.coin,
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);
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// check for duplicates before adding to list
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if (allTransactions
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.indexWhere((e) => e["txid"] == tx["txid"] as String) ==
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-1) {
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tx["address"] = addresses.firstWhere((e) => e.value == data.address);
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tx["height"] = data.height;
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allTransactions.add(tx);
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}
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}
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final List<({Transaction transaction, Address address})> txnsData = [];
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for (final txObject in allTransactions) {
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final data = await _parseTransactionV1(
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txObject,
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addresses,
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);
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txnsData.add(data);
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}
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return txnsData;
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}
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Future<ElectrumXNode> getCurrentElectrumXNode() async {
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final node = getCurrentNode();
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return ElectrumXNode(
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address: node.host,
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port: node.port,
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name: node.name,
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useSSL: node.useSSL,
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id: node.id,
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);
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}
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Future<void> updateElectrumX({required ElectrumXNode newNode}) async {
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final failovers = nodeService
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.failoverNodesFor(coin: cryptoCurrency.coin)
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.map((e) => ElectrumXNode(
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address: e.host,
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port: e.port,
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name: e.name,
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id: e.id,
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useSSL: e.useSSL,
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))
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.toList();
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final newNode = await getCurrentElectrumXNode();
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electrumX = ElectrumX.from(
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node: newNode,
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prefs: prefs,
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failovers: failovers,
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);
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electrumXCached = CachedElectrumX.from(
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electrumXClient: electrumX,
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);
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}
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//============================================================================
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Future<List<Map<String, dynamic>>> fetchHistory(
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Iterable<String> allAddresses,
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) async {
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try {
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List<Map<String, dynamic>> allTxHashes = [];
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final Map<int, Map<String, List<dynamic>>> batches = {};
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final Map<String, String> requestIdToAddressMap = {};
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const batchSizeMax = 100;
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int batchNumber = 0;
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for (int i = 0; i < allAddresses.length; i++) {
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if (batches[batchNumber] == null) {
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batches[batchNumber] = {};
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}
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final scriptHash = cryptoCurrency.addressToScriptHash(
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address: allAddresses.elementAt(i),
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);
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final id = Logger.isTestEnv ? "$i" : const Uuid().v1();
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requestIdToAddressMap[id] = allAddresses.elementAt(i);
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batches[batchNumber]!.addAll({
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id: [scriptHash]
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});
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if (i % batchSizeMax == batchSizeMax - 1) {
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batchNumber++;
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}
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}
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for (int i = 0; i < batches.length; i++) {
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final response = await electrumX.getBatchHistory(args: batches[i]!);
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for (final entry in response.entries) {
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for (int j = 0; j < entry.value.length; j++) {
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entry.value[j]["address"] = requestIdToAddressMap[entry.key];
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if (!allTxHashes.contains(entry.value[j])) {
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allTxHashes.add(entry.value[j]);
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}
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}
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}
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}
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return allTxHashes;
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} catch (e, s) {
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Logging.instance.log("_fetchHistory: $e\n$s", level: LogLevel.Error);
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rethrow;
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}
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}
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/// The optional (nullable) param [checkBlock] is a callback that can be used
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/// to check if a utxo should be marked as blocked
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Future<UTXO> parseUTXO({
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required Map<String, dynamic> jsonUTXO,
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}) async {
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final txn = await electrumXCached.getTransaction(
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txHash: jsonUTXO["tx_hash"] as String,
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verbose: true,
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coin: cryptoCurrency.coin,
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);
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final vout = jsonUTXO["tx_pos"] as int;
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final outputs = txn["vout"] as List;
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String? scriptPubKey;
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String? utxoOwnerAddress;
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// get UTXO owner address
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for (final output in outputs) {
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if (output["n"] == vout) {
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scriptPubKey = output["scriptPubKey"]?["hex"] as String?;
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utxoOwnerAddress =
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output["scriptPubKey"]?["addresses"]?[0] as String? ??
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output["scriptPubKey"]?["address"] as String?;
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}
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}
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final checkBlockResult = checkBlockUTXO(jsonUTXO, scriptPubKey, txn);
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final utxo = UTXO(
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walletId: walletId,
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txid: txn["txid"] as String,
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vout: vout,
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value: jsonUTXO["value"] as int,
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name: "",
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isBlocked: checkBlockResult.blocked,
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blockedReason: checkBlockResult.blockedReason,
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isCoinbase: txn["is_coinbase"] as bool? ?? false,
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blockHash: txn["blockhash"] as String?,
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blockHeight: jsonUTXO["height"] as int?,
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blockTime: txn["blocktime"] as int?,
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address: utxoOwnerAddress,
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);
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return utxo;
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}
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Future<({Transaction transaction, Address address})> _parseTransactionV1(
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Map<String, dynamic> txData,
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List<Address> myAddresses,
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) async {
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Set<String> receivingAddresses = myAddresses
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.where((e) =>
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e.subType == AddressSubType.receiving ||
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e.subType == AddressSubType.paynymReceive ||
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e.subType == AddressSubType.paynymNotification)
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.map((e) => e.value)
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.toSet();
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Set<String> changeAddresses = myAddresses
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.where((e) => e.subType == AddressSubType.change)
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.map((e) => e.value)
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.toSet();
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Set<String> inputAddresses = {};
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Set<String> outputAddresses = {};
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Amount totalInputValue = Amount(
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rawValue: BigInt.zero,
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fractionDigits: cryptoCurrency.coin.decimals,
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);
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Amount totalOutputValue = Amount(
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rawValue: BigInt.zero,
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fractionDigits: cryptoCurrency.coin.decimals,
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);
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Amount amountSentFromWallet = Amount(
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rawValue: BigInt.zero,
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fractionDigits: cryptoCurrency.coin.decimals,
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);
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Amount amountReceivedInWallet = Amount(
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rawValue: BigInt.zero,
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fractionDigits: cryptoCurrency.coin.decimals,
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);
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Amount changeAmount = Amount(
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rawValue: BigInt.zero,
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fractionDigits: cryptoCurrency.coin.decimals,
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);
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// parse inputs
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for (final input in txData["vin"] as List) {
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final prevTxid = input["txid"] as String;
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final prevOut = input["vout"] as int;
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// fetch input tx to get address
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final inputTx = await electrumXCached.getTransaction(
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txHash: prevTxid,
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coin: cryptoCurrency.coin,
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);
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for (final output in inputTx["vout"] as List) {
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// check matching output
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if (prevOut == output["n"]) {
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// get value
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final value = Amount.fromDecimal(
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Decimal.parse(output["value"].toString()),
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fractionDigits: cryptoCurrency.coin.decimals,
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);
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// add value to total
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totalInputValue += value;
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// get input(prevOut) address
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final address = output["scriptPubKey"]?["addresses"]?[0] as String? ??
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output["scriptPubKey"]?["address"] as String?;
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if (address != null) {
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inputAddresses.add(address);
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// if input was from my wallet, add value to amount sent
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if (receivingAddresses.contains(address) ||
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changeAddresses.contains(address)) {
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amountSentFromWallet += value;
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}
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}
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}
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}
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}
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// parse outputs
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for (final output in txData["vout"] as List) {
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// get value
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final value = Amount.fromDecimal(
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Decimal.parse(output["value"].toString()),
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fractionDigits: cryptoCurrency.coin.decimals,
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);
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// add value to total
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totalOutputValue += value;
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// get output address
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final address = output["scriptPubKey"]?["addresses"]?[0] as String? ??
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output["scriptPubKey"]?["address"] as String?;
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if (address != null) {
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outputAddresses.add(address);
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// if output was to my wallet, add value to amount received
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if (receivingAddresses.contains(address)) {
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amountReceivedInWallet += value;
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} else if (changeAddresses.contains(address)) {
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changeAmount += value;
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}
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}
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}
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final mySentFromAddresses = [
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...receivingAddresses.intersection(inputAddresses),
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...changeAddresses.intersection(inputAddresses)
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];
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final myReceivedOnAddresses =
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receivingAddresses.intersection(outputAddresses);
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final myChangeReceivedOnAddresses =
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changeAddresses.intersection(outputAddresses);
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final fee = totalInputValue - totalOutputValue;
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// this is the address initially used to fetch the txid
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Address transactionAddress = txData["address"] as Address;
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TransactionType type;
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Amount amount;
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if (mySentFromAddresses.isNotEmpty && myReceivedOnAddresses.isNotEmpty) {
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// tx is sent to self
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type = TransactionType.sentToSelf;
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// should be 0
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amount =
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amountSentFromWallet - amountReceivedInWallet - fee - changeAmount;
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} else if (mySentFromAddresses.isNotEmpty) {
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// outgoing tx
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type = TransactionType.outgoing;
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amount = amountSentFromWallet - changeAmount - fee;
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// non wallet addresses found in tx outputs
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final nonWalletOutAddresses = outputAddresses.difference(
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myChangeReceivedOnAddresses,
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);
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if (nonWalletOutAddresses.isNotEmpty) {
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final possible = nonWalletOutAddresses.first;
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if (transactionAddress.value != possible) {
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transactionAddress = Address(
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walletId: myAddresses.first.walletId,
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value: possible,
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derivationIndex: -1,
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derivationPath: null,
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subType: AddressSubType.nonWallet,
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type: AddressType.nonWallet,
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publicKey: [],
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);
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}
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} else {
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// some other type of tx where the receiving address is
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// one of my change addresses
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type = TransactionType.sentToSelf;
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amount = changeAmount;
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}
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} else {
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// incoming tx
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type = TransactionType.incoming;
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amount = amountReceivedInWallet;
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}
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List<Output> outs = [];
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List<Input> ins = [];
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for (final json in txData["vin"] as List) {
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bool isCoinBase = json['coinbase'] != null;
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String? witness;
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if (json['witness'] != null && json['witness'] is String) {
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witness = json['witness'] as String;
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} else if (json['txinwitness'] != null) {
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if (json['txinwitness'] is List) {
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witness = jsonEncode(json['txinwitness']);
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}
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}
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final input = Input(
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txid: json['txid'] as String,
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vout: json['vout'] as int? ?? -1,
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scriptSig: json['scriptSig']?['hex'] as String?,
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scriptSigAsm: json['scriptSig']?['asm'] as String?,
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isCoinbase: isCoinBase ? isCoinBase : json['is_coinbase'] as bool?,
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sequence: json['sequence'] as int?,
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innerRedeemScriptAsm: json['innerRedeemscriptAsm'] as String?,
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witness: witness,
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);
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ins.add(input);
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}
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for (final json in txData["vout"] as List) {
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final output = Output(
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scriptPubKey: json['scriptPubKey']?['hex'] as String?,
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scriptPubKeyAsm: json['scriptPubKey']?['asm'] as String?,
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scriptPubKeyType: json['scriptPubKey']?['type'] as String?,
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scriptPubKeyAddress:
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json["scriptPubKey"]?["addresses"]?[0] as String? ??
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json['scriptPubKey']?['type'] as String? ??
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"",
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value: Amount.fromDecimal(
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Decimal.parse(json["value"].toString()),
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fractionDigits: cryptoCurrency.coin.decimals,
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).raw.toInt(),
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);
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outs.add(output);
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}
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TransactionSubType txSubType = TransactionSubType.none;
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if (this is PaynymWalletInterface && outs.length > 1 && ins.isNotEmpty) {
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for (int i = 0; i < outs.length; i++) {
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List<String>? scriptChunks = outs[i].scriptPubKeyAsm?.split(" ");
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if (scriptChunks?.length == 2 && scriptChunks?[0] == "OP_RETURN") {
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final blindedPaymentCode = scriptChunks![1];
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final bytes = blindedPaymentCode.fromHex;
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// https://en.bitcoin.it/wiki/BIP_0047#Sending
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if (bytes.length == 80 && bytes.first == 1) {
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txSubType = TransactionSubType.bip47Notification;
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}
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}
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}
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}
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final tx = Transaction(
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walletId: myAddresses.first.walletId,
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txid: txData["txid"] as String,
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timestamp: txData["blocktime"] as int? ??
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(DateTime.now().millisecondsSinceEpoch ~/ 1000),
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type: type,
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subType: txSubType,
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// amount may overflow. Deprecated. Use amountString
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amount: amount.raw.toInt(),
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amountString: amount.toJsonString(),
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fee: fee.raw.toInt(),
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height: txData["height"] as int?,
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isCancelled: false,
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isLelantus: false,
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slateId: null,
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otherData: null,
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nonce: null,
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inputs: ins,
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outputs: outs,
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numberOfMessages: null,
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);
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return (transaction: tx, address: transactionAddress);
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}
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//============================================================================
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@override
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Future<void> updateChainHeight() async {
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final height = await fetchChainHeight();
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await info.updateCachedChainHeight(
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newHeight: height,
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isar: mainDB.isar,
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);
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}
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@override
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Future<bool> pingCheck() async {
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try {
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final result = await electrumX.ping();
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return result;
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} catch (_) {
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return false;
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}
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}
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@override
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Future<void> updateNode() async {
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final node = await getCurrentElectrumXNode();
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await updateElectrumX(newNode: node);
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}
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FeeObject? _cachedFees;
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@override
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Future<FeeObject> get fees async {
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try {
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const int f = 1, m = 5, s = 20;
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final fast = await electrumX.estimateFee(blocks: f);
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final medium = await electrumX.estimateFee(blocks: m);
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final slow = await electrumX.estimateFee(blocks: s);
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final feeObject = FeeObject(
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numberOfBlocksFast: f,
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numberOfBlocksAverage: m,
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numberOfBlocksSlow: s,
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fast: Amount.fromDecimal(
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fast,
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fractionDigits: info.coin.decimals,
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).raw.toInt(),
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medium: Amount.fromDecimal(
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medium,
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fractionDigits: info.coin.decimals,
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).raw.toInt(),
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slow: Amount.fromDecimal(
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slow,
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fractionDigits: info.coin.decimals,
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).raw.toInt(),
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);
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Logging.instance.log("fetched fees: $feeObject", level: LogLevel.Info);
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_cachedFees = feeObject;
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return _cachedFees!;
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} catch (e) {
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Logging.instance.log(
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"Exception rethrown from _getFees(): $e",
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level: LogLevel.Error,
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);
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if (_cachedFees == null) {
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rethrow;
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} else {
|
|
return _cachedFees!;
|
|
}
|
|
}
|
|
}
|
|
|
|
@override
|
|
Future<Amount> estimateFeeFor(Amount amount, int feeRate) async {
|
|
final available = info.cachedBalance.spendable;
|
|
final utxos = _spendableUTXOs(await mainDB.getUTXOs(walletId).findAll());
|
|
|
|
if (available == amount) {
|
|
return amount - (await _sweepAllEstimate(feeRate, utxos));
|
|
} else if (amount <= Amount.zero || amount > available) {
|
|
return roughFeeEstimate(1, 2, feeRate);
|
|
}
|
|
|
|
Amount runningBalance = Amount(
|
|
rawValue: BigInt.zero,
|
|
fractionDigits: info.coin.decimals,
|
|
);
|
|
int inputCount = 0;
|
|
for (final output in utxos) {
|
|
if (!output.isBlocked) {
|
|
runningBalance += Amount(
|
|
rawValue: BigInt.from(output.value),
|
|
fractionDigits: info.coin.decimals,
|
|
);
|
|
inputCount++;
|
|
if (runningBalance > amount) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
final oneOutPutFee = roughFeeEstimate(inputCount, 1, feeRate);
|
|
final twoOutPutFee = roughFeeEstimate(inputCount, 2, feeRate);
|
|
|
|
if (runningBalance - amount > oneOutPutFee) {
|
|
if (runningBalance - amount > oneOutPutFee + cryptoCurrency.dustLimit) {
|
|
final change = runningBalance - amount - twoOutPutFee;
|
|
if (change > cryptoCurrency.dustLimit &&
|
|
runningBalance - amount - change == twoOutPutFee) {
|
|
return runningBalance - amount - change;
|
|
} else {
|
|
return runningBalance - amount;
|
|
}
|
|
} else {
|
|
return runningBalance - amount;
|
|
}
|
|
} else if (runningBalance - amount == oneOutPutFee) {
|
|
return oneOutPutFee;
|
|
} else {
|
|
return twoOutPutFee;
|
|
}
|
|
}
|
|
|
|
@override
|
|
Future<void> checkReceivingAddressForTransactions() async {
|
|
try {
|
|
final currentReceiving = await getCurrentReceivingAddress();
|
|
|
|
final bool needsGenerate;
|
|
if (currentReceiving == null) {
|
|
// no addresses in db yet for some reason.
|
|
// Should not happen at this point...
|
|
|
|
needsGenerate = true;
|
|
} else {
|
|
final txCount = await fetchTxCount(
|
|
addressScriptHash: currentReceiving.value,
|
|
);
|
|
needsGenerate = txCount > 0 || currentReceiving.derivationIndex < 0;
|
|
}
|
|
|
|
if (needsGenerate) {
|
|
await generateNewReceivingAddress();
|
|
|
|
// TODO: get rid of this? Could cause problems (long loading/infinite loop or something)
|
|
// keep checking until address with no tx history is set as current
|
|
await checkReceivingAddressForTransactions();
|
|
}
|
|
} catch (e, s) {
|
|
Logging.instance.log(
|
|
"Exception rethrown from _checkReceivingAddressForTransactions"
|
|
"($cryptoCurrency): $e\n$s",
|
|
level: LogLevel.Error,
|
|
);
|
|
rethrow;
|
|
}
|
|
}
|
|
|
|
@override
|
|
Future<void> updateUTXOs() async {
|
|
final allAddresses = await fetchAllOwnAddresses();
|
|
|
|
try {
|
|
final fetchedUtxoList = <List<Map<String, dynamic>>>[];
|
|
|
|
final Map<int, Map<String, List<dynamic>>> batches = {};
|
|
const batchSizeMax = 10;
|
|
int batchNumber = 0;
|
|
for (int i = 0; i < allAddresses.length; i++) {
|
|
if (batches[batchNumber] == null) {
|
|
batches[batchNumber] = {};
|
|
}
|
|
final scriptHash = cryptoCurrency.addressToScriptHash(
|
|
address: allAddresses[i].value,
|
|
);
|
|
|
|
batches[batchNumber]!.addAll({
|
|
scriptHash: [scriptHash]
|
|
});
|
|
if (i % batchSizeMax == batchSizeMax - 1) {
|
|
batchNumber++;
|
|
}
|
|
}
|
|
|
|
for (int i = 0; i < batches.length; i++) {
|
|
final response = await electrumX.getBatchUTXOs(args: batches[i]!);
|
|
for (final entry in response.entries) {
|
|
if (entry.value.isNotEmpty) {
|
|
fetchedUtxoList.add(entry.value);
|
|
}
|
|
}
|
|
}
|
|
|
|
final List<UTXO> outputArray = [];
|
|
|
|
for (int i = 0; i < fetchedUtxoList.length; i++) {
|
|
for (int j = 0; j < fetchedUtxoList[i].length; j++) {
|
|
final utxo = await parseUTXO(
|
|
jsonUTXO: fetchedUtxoList[i][j],
|
|
);
|
|
|
|
outputArray.add(utxo);
|
|
}
|
|
}
|
|
|
|
await mainDB.updateUTXOs(walletId, outputArray);
|
|
} catch (e, s) {
|
|
Logging.instance.log(
|
|
"Output fetch unsuccessful: $e\n$s",
|
|
level: LogLevel.Error,
|
|
);
|
|
}
|
|
}
|
|
|
|
// ===========================================================================
|
|
// ========== Interface functions ============================================
|
|
|
|
Amount roughFeeEstimate(int inputCount, int outputCount, int feeRatePerKB);
|
|
|
|
Future<List<Address>> fetchAllOwnAddresses();
|
|
|
|
/// callback to pass to [parseUTXO] to check if the utxo should be marked
|
|
/// as blocked as well as give a reason.
|
|
({String? blockedReason, bool blocked}) checkBlockUTXO(
|
|
Map<String, dynamic> jsonUTXO,
|
|
String? scriptPubKeyHex,
|
|
Map<String, dynamic> jsonTX,
|
|
);
|
|
|
|
// ===========================================================================
|
|
// ========== private helpers ================================================
|
|
|
|
List<UTXO> _spendableUTXOs(List<UTXO> utxos) {
|
|
return utxos
|
|
.where(
|
|
(e) =>
|
|
!e.isBlocked &&
|
|
e.isConfirmed(
|
|
info.cachedChainHeight,
|
|
cryptoCurrency.minConfirms,
|
|
),
|
|
)
|
|
.toList();
|
|
}
|
|
|
|
Future<Amount> _sweepAllEstimate(int feeRate, List<UTXO> usableUTXOs) async {
|
|
final available = usableUTXOs
|
|
.map((e) => BigInt.from(e.value))
|
|
.fold(BigInt.zero, (p, e) => p + e);
|
|
final inputCount = usableUTXOs.length;
|
|
|
|
// transaction will only have 1 output minus the fee
|
|
final estimatedFee = roughFeeEstimate(inputCount, 1, feeRate);
|
|
|
|
return Amount(
|
|
rawValue: available,
|
|
fractionDigits: info.coin.decimals,
|
|
) -
|
|
estimatedFee;
|
|
}
|
|
|
|
// ===========================================================================
|
|
}
|