mirror of
https://github.com/cypherstack/stack_wallet.git
synced 2024-09-30 18:31:10 +00:00
391 lines
12 KiB
Dart
391 lines
12 KiB
Dart
import 'dart:async';
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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:flutter/widgets.dart';
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import 'package:http/http.dart';
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import 'package:isar/isar.dart';
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import 'package:stackwallet/db/isar/main_db.dart';
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import 'package:stackwallet/models/isar/models/isar_models.dart';
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import 'package:stackwallet/models/node_model.dart';
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import 'package:stackwallet/models/paymint/fee_object_model.dart';
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import 'package:stackwallet/models/token_balance.dart';
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import 'package:stackwallet/services/coins/ethereum/ethereum_wallet.dart';
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import 'package:stackwallet/services/ethereum/ethereum_api.dart';
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import 'package:stackwallet/services/event_bus/events/global/updated_in_background_event.dart';
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import 'package:stackwallet/services/event_bus/events/global/wallet_sync_status_changed_event.dart';
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import 'package:stackwallet/services/event_bus/global_event_bus.dart';
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import 'package:stackwallet/services/mixins/eth_token_cache.dart';
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import 'package:stackwallet/services/node_service.dart';
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import 'package:stackwallet/services/transaction_notification_tracker.dart';
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import 'package:stackwallet/utilities/default_nodes.dart';
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import 'package:stackwallet/utilities/enums/coin_enum.dart';
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import 'package:stackwallet/utilities/enums/fee_rate_type_enum.dart';
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import 'package:stackwallet/utilities/eth_commons.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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import 'package:web3dart/web3dart.dart' as web3dart;
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class EthTokenWallet extends ChangeNotifier with EthTokenCache {
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final EthereumWallet ethWallet;
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final TransactionNotificationTracker tracker;
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final SecureStorageInterface _secureStore;
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// late web3dart.EthereumAddress _contractAddress;
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late web3dart.EthPrivateKey _credentials;
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late web3dart.DeployedContract _deployedContract;
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late web3dart.ContractFunction _balanceFunction;
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late web3dart.ContractFunction _sendFunction;
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late web3dart.Web3Client _client;
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static const _gasLimit = 200000;
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EthTokenWallet({
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required EthContract token,
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required this.ethWallet,
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required SecureStorageInterface secureStore,
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required this.tracker,
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}) : _secureStore = secureStore,
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_tokenContract = token {
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// _contractAddress = web3dart.EthereumAddress.fromHex(token.address);
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initCache(ethWallet.walletId, token);
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}
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EthContract get tokenContract => _tokenContract;
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EthContract _tokenContract;
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TokenBalance get balance => _balance ??= getCachedBalance();
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TokenBalance? _balance;
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Coin get coin => Coin.ethereum;
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Future<String> confirmSend({required Map<String, dynamic> txData}) async {
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final amount = txData['recipientAmt'];
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final decimalAmount =
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Format.satoshisToAmount(amount as int, coin: Coin.ethereum);
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final bigIntAmount =
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amountToBigInt(decimalAmount.toDouble(), tokenContract.decimals);
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final sentTx = await _client.sendTransaction(
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_credentials,
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web3dart.Transaction.callContract(
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contract: _deployedContract,
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function: _sendFunction,
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parameters: [
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web3dart.EthereumAddress.fromHex(txData['address'] as String),
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bigIntAmount
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],
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maxGas: _gasLimit,
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gasPrice: web3dart.EtherAmount.fromUnitAndValue(
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web3dart.EtherUnit.wei, txData['feeInWei'])));
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return sentTx;
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}
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Future<String> get currentReceivingAddress async {
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final address = await _currentReceivingAddress;
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return checksumEthereumAddress(
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address?.value ?? _credentials.address.toString());
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}
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Future<Address?> get _currentReceivingAddress => ethWallet.db
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.getAddresses(ethWallet.walletId)
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.filter()
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.typeEqualTo(AddressType.ethereum)
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.subTypeEqualTo(AddressSubType.receiving)
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.sortByDerivationIndexDesc()
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.findFirst();
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Future<int> estimateFeeFor(int satoshiAmount, int feeRate) async {
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final fee = estimateFee(feeRate, _gasLimit, tokenContract.decimals);
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return Format.decimalAmountToSatoshis(Decimal.parse(fee.toString()), coin);
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}
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Future<FeeObject> get fees => _feeObject ??= _getFees();
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Future<FeeObject>? _feeObject;
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Future<FeeObject> _getFees() async {
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return await EthereumAPI.getFees();
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}
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Future<EthContract> _updateTokenABI({
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required EthContract forContract,
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required String usingContractAddress,
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}) async {
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final abiResponse = await EthereumAPI.getTokenAbi(usingContractAddress);
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// Fetch token ABI so we can call token functions
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if (abiResponse.value != null) {
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final updatedToken = forContract.copyWith(abi: abiResponse.value!);
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// Store updated contract
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final id = await MainDB.instance.putEthContract(updatedToken);
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return updatedToken..id = id;
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} else {
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throw abiResponse.exception!;
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}
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}
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Future<void> initialize() async {
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final contractAddress =
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web3dart.EthereumAddress.fromHex(tokenContract.address);
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if (tokenContract.abi == null) {
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_tokenContract = await _updateTokenABI(
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forContract: tokenContract,
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usingContractAddress: contractAddress.hex,
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);
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}
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String? mnemonicString = await ethWallet.mnemonicString;
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//Get private key for given mnemonic
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String privateKey = getPrivateKey(
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mnemonicString!,
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(await ethWallet.mnemonicPassphrase) ?? "",
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);
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_credentials = web3dart.EthPrivateKey.fromHex(privateKey);
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_deployedContract = web3dart.DeployedContract(
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web3dart.ContractAbi.fromJson(tokenContract.abi!, tokenContract.name),
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contractAddress,
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);
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try {
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_balanceFunction = _deployedContract.function('balanceOf');
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_sendFunction = _deployedContract.function('transfer');
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} catch (_) {
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// function not found so likely a proxy so we need to fetch the impl
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final contractAddressResponse =
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await EthereumAPI.getProxyTokenImplementation(contractAddress.hex);
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if (contractAddressResponse.value != null) {
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_tokenContract = await _updateTokenABI(
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forContract: tokenContract,
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usingContractAddress: contractAddressResponse.value!,
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);
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} else {
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throw contractAddressResponse.exception!;
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}
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}
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_deployedContract = web3dart.DeployedContract(
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web3dart.ContractAbi.fromJson(
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tokenContract.abi!,
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tokenContract.name,
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),
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contractAddress,
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);
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_balanceFunction = _deployedContract.function('balanceOf');
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_sendFunction = _deployedContract.function('transfer');
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_client = await getEthClient();
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unawaited(refresh());
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}
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bool get isRefreshing => _refreshLock;
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Future<Map<String, dynamic>> prepareSend(
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{required String address,
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required int satoshiAmount,
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Map<String, dynamic>? args}) async {
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final feeRateType = args?["feeRate"];
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int fee = 0;
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final feeObject = await fees;
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switch (feeRateType) {
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case FeeRateType.fast:
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fee = feeObject.fast;
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break;
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case FeeRateType.average:
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fee = feeObject.medium;
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break;
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case FeeRateType.slow:
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fee = feeObject.slow;
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break;
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}
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final feeEstimate = await estimateFeeFor(satoshiAmount, fee);
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Map<String, dynamic> txData = {
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"fee": feeEstimate,
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"feeInWei": fee,
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"address": address,
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"recipientAmt": satoshiAmount,
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};
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return txData;
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}
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bool _refreshLock = false;
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Future<void> refresh() async {
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if (!_refreshLock) {
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_refreshLock = true;
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try {
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GlobalEventBus.instance.fire(
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WalletSyncStatusChangedEvent(
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WalletSyncStatus.syncing,
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ethWallet.walletId + tokenContract.address,
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coin,
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),
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);
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await refreshCachedBalance();
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await _refreshTransactions();
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} catch (e, s) {
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Logging.instance.log(
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"Caught exception in ${tokenContract.name} ${ethWallet.walletName} ${ethWallet.walletId} refresh(): $e\n$s",
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level: LogLevel.Warning,
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);
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} finally {
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_refreshLock = false;
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GlobalEventBus.instance.fire(
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WalletSyncStatusChangedEvent(
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WalletSyncStatus.synced,
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ethWallet.walletId + tokenContract.address,
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coin,
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),
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);
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notifyListeners();
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}
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}
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}
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Future<void> refreshCachedBalance() async {
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final balanceRequest = await _client.call(
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contract: _deployedContract,
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function: _balanceFunction,
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params: [_credentials.address],
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);
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String _balance = balanceRequest.first.toString();
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final newBalance = TokenBalance(
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contractAddress: tokenContract.address,
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total: int.parse(_balance),
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spendable: int.parse(_balance),
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blockedTotal: 0,
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pendingSpendable: 0,
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decimalPlaces: tokenContract.decimals,
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);
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await updateCachedBalance(newBalance);
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notifyListeners();
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}
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Future<List<Transaction>> get transactions => ethWallet.db
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.getTransactions(ethWallet.walletId)
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.filter()
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.otherDataEqualTo(tokenContract.address)
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.sortByTimestampDesc()
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.findAll();
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Future<void> _refreshTransactions() async {
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String addressString = await currentReceivingAddress;
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final response = await EthereumAPI.getTokenTransactions(
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address: addressString,
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contractAddress: tokenContract.address,
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);
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if (response.value == null) {
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throw response.exception ??
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Exception("Failed to fetch token transactions");
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}
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final List<Tuple2<Transaction, Address?>> txnsData = [];
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for (final tx in response.value!) {
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bool isIncoming;
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if (checksumEthereumAddress(tx.from) == addressString) {
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isIncoming = false;
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} else {
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isIncoming = true;
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}
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final txn = Transaction(
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walletId: ethWallet.walletId,
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txid: tx.hash,
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timestamp: tx.timeStamp,
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type: isIncoming ? TransactionType.incoming : TransactionType.outgoing,
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subType: TransactionSubType.ethToken,
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amount: tx.value.toInt(),
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fee: tx.gasUsed * tx.gasPrice.toInt(),
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height: tx.blockNumber,
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isCancelled: false,
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isLelantus: false,
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slateId: null,
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otherData: tx.contractAddress,
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inputs: [],
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outputs: [],
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);
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Address? transactionAddress = await ethWallet.db
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.getAddresses(ethWallet.walletId)
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.filter()
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.valueEqualTo(addressString)
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.findFirst();
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if (transactionAddress == null) {
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if (isIncoming) {
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transactionAddress = Address(
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walletId: ethWallet.walletId,
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value: addressString,
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publicKey: [],
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derivationIndex: 0,
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derivationPath: DerivationPath()..value = "$hdPathEthereum/0",
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type: AddressType.ethereum,
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subType: AddressSubType.receiving,
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);
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} else {
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final myRcvAddr = await currentReceivingAddress;
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final isSentToSelf = myRcvAddr == addressString;
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transactionAddress = Address(
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walletId: ethWallet.walletId,
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value: addressString,
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publicKey: [],
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derivationIndex: isSentToSelf ? 0 : -1,
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derivationPath: isSentToSelf
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? (DerivationPath()..value = "$hdPathEthereum/0")
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: null,
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type: AddressType.ethereum,
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subType: isSentToSelf
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? AddressSubType.receiving
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: AddressSubType.nonWallet,
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);
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}
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}
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txnsData.add(Tuple2(txn, transactionAddress));
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}
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await ethWallet.db.addNewTransactionData(txnsData, ethWallet.walletId);
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// quick hack to notify manager to call notifyListeners if
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// transactions changed
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if (txnsData.isNotEmpty) {
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GlobalEventBus.instance.fire(
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UpdatedInBackgroundEvent(
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"${tokenContract.name} transactions updated/added for: ${ethWallet.walletId} ${ethWallet.walletName}",
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ethWallet.walletId,
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),
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);
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}
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}
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bool validateAddress(String address) {
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return isValidEthereumAddress(address);
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}
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Future<NodeModel> getCurrentNode() async {
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return NodeService(secureStorageInterface: _secureStore)
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.getPrimaryNodeFor(coin: coin) ??
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DefaultNodes.getNodeFor(coin);
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}
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Future<web3dart.Web3Client> getEthClient() async {
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final node = await getCurrentNode();
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return web3dart.Web3Client(node.host, Client());
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}
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}
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