mirror of
https://github.com/cypherstack/stack_wallet.git
synced 2024-11-17 09:47:37 +00:00
488 lines
14 KiB
Dart
488 lines
14 KiB
Dart
import 'dart:async';
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import 'dart:convert';
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import 'package:decimal/decimal.dart';
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import 'package:ethereum_addresses/ethereum_addresses.dart';
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import 'package:http/http.dart';
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import 'package:isar/isar.dart';
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import '../../../models/balance.dart';
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import '../../../models/isar/models/blockchain_data/address.dart';
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import '../../../models/isar/models/blockchain_data/transaction.dart';
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import '../../../models/isar/models/blockchain_data/v2/input_v2.dart';
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import '../../../models/isar/models/blockchain_data/v2/output_v2.dart';
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import '../../../models/isar/models/blockchain_data/v2/transaction_v2.dart';
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import '../../../models/paymint/fee_object_model.dart';
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import '../../../services/ethereum/ethereum_api.dart';
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import '../../../services/event_bus/events/global/updated_in_background_event.dart';
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import '../../../services/event_bus/global_event_bus.dart';
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import '../../../utilities/amount/amount.dart';
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import '../../../utilities/enums/fee_rate_type_enum.dart';
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import '../../../utilities/eth_commons.dart';
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import '../../../utilities/logger.dart';
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import '../../crypto_currency/coins/ethereum.dart';
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import '../../crypto_currency/crypto_currency.dart';
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import '../../models/tx_data.dart';
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import '../intermediate/bip39_wallet.dart';
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import '../wallet_mixin_interfaces/private_key_interface.dart';
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import 'package:web3dart/web3dart.dart' as web3;
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// Eth can not use tor with web3dart
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class EthereumWallet extends Bip39Wallet with PrivateKeyInterface {
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EthereumWallet(CryptoCurrencyNetwork network) : super(Ethereum(network));
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Timer? timer;
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web3.EthPrivateKey? _credentials;
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Future<void> updateTokenContracts(List<String> contractAddresses) async {
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await info.updateContractAddresses(
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newContractAddresses: contractAddresses.toSet(),
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isar: mainDB.isar,
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);
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GlobalEventBus.instance.fire(
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UpdatedInBackgroundEvent(
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"$contractAddresses updated/added for: $walletId ${info.name}",
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walletId,
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),
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);
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}
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web3.Web3Client getEthClient() {
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final node = getCurrentNode();
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// Eth can not use tor with web3dart as Client does not support proxies
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final client = Client();
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return web3.Web3Client(node.host, client);
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}
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Amount estimateEthFee(int feeRate, int gasLimit, int decimals) {
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final gweiAmount = feeRate.toDecimal() / (Decimal.ten.pow(9).toDecimal());
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final fee = gasLimit.toDecimal() *
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gweiAmount.toDecimal(
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scaleOnInfinitePrecision: cryptoCurrency.fractionDigits,
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);
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//Convert gwei to ETH
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final feeInWei = fee * Decimal.ten.pow(9).toDecimal();
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final ethAmount = feeInWei / Decimal.ten.pow(decimals).toDecimal();
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return Amount.fromDecimal(
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ethAmount.toDecimal(
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scaleOnInfinitePrecision: cryptoCurrency.fractionDigits,
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),
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fractionDigits: decimals,
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);
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}
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// ==================== Private ==============================================
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Future<void> _initCredentials() async {
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final mnemonic = await getMnemonic();
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final mnemonicPassphrase = await getMnemonicPassphrase();
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final privateKey = getPrivateKey(mnemonic, mnemonicPassphrase);
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_credentials = web3.EthPrivateKey.fromHex(privateKey);
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}
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// ==================== Overrides ============================================
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@override
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int get isarTransactionVersion => 2;
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@override
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FilterOperation? get transactionFilterOperation => FilterGroup.not(
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const FilterCondition.equalTo(
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property: r"subType",
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value: TransactionSubType.ethToken,
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),
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);
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@override
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FilterOperation? get changeAddressFilterOperation =>
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FilterGroup.and(standardChangeAddressFilters);
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@override
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FilterOperation? get receivingAddressFilterOperation =>
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FilterGroup.and(standardReceivingAddressFilters);
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@override
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Future<void> checkSaveInitialReceivingAddress() async {
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final address = await getCurrentReceivingAddress();
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if (address == null) {
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if (_credentials == null) {
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await _initCredentials();
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}
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final address = Address(
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walletId: walletId,
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value: _credentials!.address.hexEip55,
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publicKey: [],
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// maybe store address bytes here? seems a waste of space though
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derivationIndex: 0,
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derivationPath: DerivationPath()..value = "$hdPathEthereum/0",
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type: AddressType.ethereum,
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subType: AddressSubType.receiving,
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);
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await mainDB.updateOrPutAddresses([address]);
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}
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}
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@override
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Future<Amount> estimateFeeFor(Amount amount, int feeRate) async {
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return estimateEthFee(
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feeRate,
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(cryptoCurrency as Ethereum).gasLimit,
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cryptoCurrency.fractionDigits,
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);
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}
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@override
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Future<FeeObject> get fees => EthereumAPI.getFees();
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@override
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Future<bool> pingCheck() async {
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web3.Web3Client client = getEthClient();
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try {
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await client.getBlockNumber();
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return true;
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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> updateBalance() async {
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try {
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final client = getEthClient();
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final addressHex = (await getCurrentReceivingAddress())!.value;
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final address = web3.EthereumAddress.fromHex(addressHex);
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web3.EtherAmount ethBalance = await client.getBalance(address);
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final balance = Balance(
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total: Amount(
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rawValue: ethBalance.getInWei,
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fractionDigits: cryptoCurrency.fractionDigits,
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),
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spendable: Amount(
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rawValue: ethBalance.getInWei,
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fractionDigits: cryptoCurrency.fractionDigits,
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),
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blockedTotal: Amount.zeroWith(
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fractionDigits: cryptoCurrency.fractionDigits,
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),
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pendingSpendable: Amount.zeroWith(
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fractionDigits: cryptoCurrency.fractionDigits,
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),
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);
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await info.updateBalance(
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newBalance: balance,
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isar: mainDB.isar,
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);
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} catch (e, s) {
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Logging.instance.log(
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"$runtimeType wallet failed to update balance: $e\n$s",
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level: LogLevel.Warning,
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);
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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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try {
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final client = getEthClient();
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final height = await client.getBlockNumber();
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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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} catch (e, s) {
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Logging.instance.log(
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"$runtimeType Exception caught in chainHeight: $e\n$s",
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level: LogLevel.Warning,
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);
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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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// do nothing
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}
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@override
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Future<void> updateTransactions({bool isRescan = false}) async {
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final thisAddress = (await getCurrentReceivingAddress())!.value;
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int firstBlock = 0;
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if (!isRescan) {
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firstBlock = await mainDB.isar.transactionV2s
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.where()
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.walletIdEqualTo(walletId)
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.heightProperty()
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.max() ??
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0;
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if (firstBlock > 10) {
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// add some buffer
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firstBlock -= 10;
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}
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}
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final response = await EthereumAPI.getEthTransactions(
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address: thisAddress,
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firstBlock: isRescan ? 0 : firstBlock,
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includeTokens: true,
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);
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if (response.value == null) {
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Logging.instance.log(
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"Failed to refresh transactions for ${cryptoCurrency.prettyName} ${info.name} "
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"$walletId: ${response.exception}",
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level: LogLevel.Warning,
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);
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return;
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}
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if (response.value!.isEmpty) {
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// no new transactions found
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return;
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}
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final txsResponse =
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await EthereumAPI.getEthTransactionNonces(response.value!);
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if (txsResponse.value != null) {
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final allTxs = txsResponse.value!;
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final List<TransactionV2> txns = [];
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for (final tuple in allTxs) {
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final element = tuple.item1;
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if (element.hasToken && !element.isError) {
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continue;
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}
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//Calculate fees (GasLimit * gasPrice)
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// int txFee = element.gasPrice * element.gasUsed;
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final Amount txFee = element.gasCost;
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final transactionAmount = element.value;
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final addressFrom = checksumEthereumAddress(element.from);
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final addressTo = checksumEthereumAddress(element.to);
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bool isIncoming;
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bool txFailed = false;
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if (addressFrom == thisAddress) {
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if (element.isError) {
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txFailed = true;
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}
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isIncoming = false;
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} else if (addressTo == thisAddress) {
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isIncoming = true;
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} else {
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continue;
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}
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// hack eth tx data into inputs and outputs
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final List<OutputV2> outputs = [];
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final List<InputV2> inputs = [];
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OutputV2 output = OutputV2.isarCantDoRequiredInDefaultConstructor(
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scriptPubKeyHex: "00",
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valueStringSats: transactionAmount.raw.toString(),
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addresses: [
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addressTo,
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],
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walletOwns: addressTo == thisAddress,
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);
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InputV2 input = InputV2.isarCantDoRequiredInDefaultConstructor(
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scriptSigHex: null,
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scriptSigAsm: null,
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sequence: null,
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outpoint: null,
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addresses: [addressFrom],
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valueStringSats: transactionAmount.raw.toString(),
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witness: null,
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innerRedeemScriptAsm: null,
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coinbase: null,
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walletOwns: addressFrom == thisAddress,
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);
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final TransactionType txType;
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if (isIncoming) {
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if (addressFrom == addressTo) {
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txType = TransactionType.sentToSelf;
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} else {
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txType = TransactionType.incoming;
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}
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} else {
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txType = TransactionType.outgoing;
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}
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outputs.add(output);
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inputs.add(input);
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final otherData = {
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"nonce": tuple.item2,
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"isCancelled": txFailed,
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"overrideFee": txFee.toJsonString(),
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};
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final txn = TransactionV2(
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walletId: walletId,
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blockHash: element.blockHash,
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hash: element.hash,
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txid: element.hash,
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timestamp: element.timestamp,
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height: element.blockNumber,
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inputs: List.unmodifiable(inputs),
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outputs: List.unmodifiable(outputs),
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version: -1,
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type: txType,
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subType: TransactionSubType.none,
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otherData: jsonEncode(otherData),
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);
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txns.add(txn);
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}
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await mainDB.updateOrPutTransactionV2s(txns);
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} else {
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Logging.instance.log(
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"Failed to refresh transactions with nonces for ${cryptoCurrency.prettyName} "
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"${info.name} $walletId: ${txsResponse.exception}",
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level: LogLevel.Warning,
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);
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}
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}
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@override
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Future<bool> updateUTXOs() async {
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// not used in eth
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return false;
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}
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@override
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Future<TxData> prepareSend({required TxData txData}) async {
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final int
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rate; // TODO: use BigInt for feeObject whenever FeeObject gets redone
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final feeObject = await fees;
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switch (txData.feeRateType!) {
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case FeeRateType.fast:
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rate = feeObject.fast;
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break;
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case FeeRateType.average:
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rate = feeObject.medium;
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break;
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case FeeRateType.slow:
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rate = feeObject.slow;
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break;
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case FeeRateType.custom:
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throw UnimplementedError("custom eth fees");
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}
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final feeEstimate = await estimateFeeFor(Amount.zero, rate);
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// bool isSendAll = false;
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// final availableBalance = balance.spendable;
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// if (satoshiAmount == availableBalance) {
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// isSendAll = true;
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// }
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//
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// if (isSendAll) {
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// //Subtract fee amount from send amount
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// satoshiAmount -= feeEstimate;
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// }
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final client = getEthClient();
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final myAddress = (await getCurrentReceivingAddress())!.value;
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final myWeb3Address = web3.EthereumAddress.fromHex(myAddress);
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final amount = txData.recipients!.first.amount;
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final address = txData.recipients!.first.address;
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// final est = await client.estimateGas(
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// sender: myWeb3Address,
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// to: web3.EthereumAddress.fromHex(address),
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// gasPrice: web3.EtherAmount.fromUnitAndValue(
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// web3.EtherUnit.wei,
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// rate,
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// ),
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// amountOfGas: BigInt.from((cryptoCurrency as Ethereum).gasLimit),
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// value: web3.EtherAmount.inWei(amount.raw),
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// );
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final nonce = txData.nonce ??
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await client.getTransactionCount(myWeb3Address,
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atBlock: const web3.BlockNum.pending());
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// final nResponse = await EthereumAPI.getAddressNonce(address: myAddress);
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// print("==============================================================");
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// print("ETH client.estimateGas: $est");
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// print("ETH estimateFeeFor : $feeEstimate");
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// print("ETH nonce custom response: $nResponse");
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// print("ETH actual nonce : $nonce");
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// print("==============================================================");
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final tx = web3.Transaction(
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to: web3.EthereumAddress.fromHex(address),
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gasPrice: web3.EtherAmount.fromUnitAndValue(
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web3.EtherUnit.wei,
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rate,
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),
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maxGas: (cryptoCurrency as Ethereum).gasLimit,
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value: web3.EtherAmount.inWei(amount.raw),
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nonce: nonce,
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);
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return txData.copyWith(
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nonce: tx.nonce,
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web3dartTransaction: tx,
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fee: feeEstimate,
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feeInWei: BigInt.from(rate),
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chainId: (await client.getChainId()),
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);
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}
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@override
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Future<TxData> confirmSend({required TxData txData}) async {
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final client = getEthClient();
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if (_credentials == null) {
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await _initCredentials();
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}
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final txid = await client.sendTransaction(
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_credentials!,
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txData.web3dartTransaction!,
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chainId: txData.chainId!.toInt(),
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);
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return txData.copyWith(
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txid: txid,
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txHash: txid,
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);
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}
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@override
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Future<void> recover({required bool isRescan}) async {
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await refreshMutex.protect(() async {
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if (isRescan) {
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await mainDB.deleteWalletBlockchainData(walletId);
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await checkSaveInitialReceivingAddress();
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await updateBalance();
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await updateTransactions(isRescan: true);
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} else {
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await checkSaveInitialReceivingAddress();
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unawaited(updateBalance());
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unawaited(updateTransactions());
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}
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});
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}
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@override
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Future<void> exit() async {
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timer?.cancel();
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timer = null;
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await super.exit();
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}
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}
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