mirror of
https://github.com/cake-tech/cake_wallet.git
synced 2024-10-30 00:47:48 +00:00
a4282cb704
* fix: Eth transaction fees WIP
* Revert "fix: Eth transaction fees WIP"
This reverts commit b9a469bc7e.
* fix: Modifying fee WIP
* fix: Enhance ETH Wallet fee calculation WIP
* feat: Enhance Transaction fees for ETH Transactions, Native transactions done, left with ERC20 transactions
* fix: Pre PR cleanups
* fix: ETH transaction fees for ERC20 transactions
* fix: ETH transaction fees for ERC20 transactions
* chore: Clarify comment in getEstimatedGas
* fix: Switch call to estimate gas units to a more cleaner approach
346 lines
10 KiB
Dart
346 lines
10 KiB
Dart
import 'dart:async';
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import 'dart:convert';
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import 'dart:developer';
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import 'package:cw_core/crypto_currency.dart';
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import 'package:cw_core/erc20_token.dart';
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import 'package:cw_core/node.dart';
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import 'package:cw_evm/evm_chain_transaction_model.dart';
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import 'package:cw_evm/evm_chain_transaction_priority.dart';
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import 'package:cw_evm/evm_erc20_balance.dart';
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import 'package:cw_evm/pending_evm_chain_transaction.dart';
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import 'package:cw_evm/.secrets.g.dart' as secrets;
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import 'package:flutter/foundation.dart';
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import 'package:hex/hex.dart' as hex;
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import 'package:http/http.dart';
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import 'package:web3dart/web3dart.dart';
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import 'contract/erc20.dart';
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abstract class EVMChainClient {
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final httpClient = Client();
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Web3Client? _client;
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//! To be overridden by all child classes
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int get chainId;
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Future<List<EVMChainTransactionModel>> fetchTransactions(String address,
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{String? contractAddress});
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Future<List<EVMChainTransactionModel>> fetchInternalTransactions(String address);
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Uint8List prepareSignedTransactionForSending(Uint8List signedTransaction);
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//! Common methods across all child classes
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bool connect(Node node) {
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try {
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_client = Web3Client(node.uri.toString(), httpClient);
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return true;
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} catch (e) {
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return false;
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}
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}
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void setListeners(EthereumAddress userAddress, Function() onNewTransaction) async {
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// _client?.pendingTransactions().listen((transactionHash) async {
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// final transaction = await _client!.getTransactionByHash(transactionHash);
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//
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// if (transaction.from.hex == userAddress || transaction.to?.hex == userAddress) {
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// onNewTransaction();
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// }
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// });
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}
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Future<EtherAmount> getBalance(EthereumAddress address) async {
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try {
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return await _client!.getBalance(address);
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} catch (_) {
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return EtherAmount.zero();
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}
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}
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Future<int> getGasUnitPrice() async {
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try {
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final gasPrice = await _client!.getGasPrice();
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return gasPrice.getInWei.toInt();
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} catch (_) {
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return 0;
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}
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}
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Future<int?> getGasBaseFee() async {
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try {
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final blockInfo = await _client!.getBlockInformation(isContainFullObj: false);
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final baseFee = blockInfo.baseFeePerGas;
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return baseFee?.getInWei.toInt();
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} catch (_) {
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return 0;
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}
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}
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Future<int> getEstimatedGas({
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String? contractAddress,
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required EthereumAddress toAddress,
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required EthereumAddress senderAddress,
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required EtherAmount value,
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EtherAmount? gasPrice,
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// EtherAmount? maxFeePerGas,
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// EtherAmount? maxPriorityFeePerGas,
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}) async {
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try {
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if (contractAddress == null) {
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final estimatedGas = await _client!.estimateGas(
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sender: senderAddress,
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gasPrice: gasPrice,
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to: toAddress,
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value: value,
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// maxPriorityFeePerGas: maxPriorityFeePerGas,
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// maxFeePerGas: maxFeePerGas,
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);
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return estimatedGas.toInt();
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} else {
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final contract = DeployedContract(
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ethereumContractAbi,
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EthereumAddress.fromHex(contractAddress),
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);
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final transfer = contract.function('transfer');
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// Estimate gas units
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final gasEstimate = await _client!.estimateGas(
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sender: senderAddress,
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to: EthereumAddress.fromHex(contractAddress),
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data: transfer.encodeCall([
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toAddress,
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value.getInWei,
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]),
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);
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return gasEstimate.toInt();
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}
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} catch (_) {
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return 0;
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}
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}
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Future<PendingEVMChainTransaction> signTransaction({
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required Credentials privateKey,
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required String toAddress,
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required BigInt amount,
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required BigInt gas,
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required EVMChainTransactionPriority priority,
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required CryptoCurrency currency,
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required int exponent,
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String? contractAddress,
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String? data,
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}) async {
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assert(currency == CryptoCurrency.eth ||
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currency == CryptoCurrency.maticpoly ||
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contractAddress != null);
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bool isNativeToken = currency == CryptoCurrency.eth || currency == CryptoCurrency.maticpoly;
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final Transaction transaction = createTransaction(
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from: privateKey.address,
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to: EthereumAddress.fromHex(toAddress),
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maxPriorityFeePerGas: EtherAmount.fromInt(EtherUnit.gwei, priority.tip),
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amount: isNativeToken ? EtherAmount.inWei(amount) : EtherAmount.zero(),
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data: data != null ? hexToBytes(data) : null,
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);
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Uint8List signedTransaction;
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final Function _sendTransaction;
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if (isNativeToken) {
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signedTransaction = await _client!.signTransaction(privateKey, transaction, chainId: chainId);
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} else {
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final erc20 = ERC20(
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client: _client!,
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address: EthereumAddress.fromHex(contractAddress!),
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chainId: chainId,
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);
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signedTransaction = await erc20.transfer(
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EthereumAddress.fromHex(toAddress),
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amount,
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credentials: privateKey,
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transaction: transaction,
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);
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}
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_sendTransaction = () async => await sendTransaction(signedTransaction);
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return PendingEVMChainTransaction(
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signedTransaction: signedTransaction,
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amount: amount.toString(),
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fee: gas,
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sendTransaction: _sendTransaction,
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exponent: exponent,
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);
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}
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Transaction createTransaction({
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required EthereumAddress from,
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required EthereumAddress to,
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required EtherAmount amount,
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EtherAmount? maxPriorityFeePerGas,
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Uint8List? data,
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}) {
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return Transaction(
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from: from,
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to: to,
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maxPriorityFeePerGas: maxPriorityFeePerGas,
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value: amount,
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data: data,
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);
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}
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Future<String> sendTransaction(Uint8List signedTransaction) async {
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return await _client!.sendRawTransaction(prepareSignedTransactionForSending(signedTransaction));
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}
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Future getTransactionDetails(String transactionHash) async {
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// Wait for the transaction receipt to become available
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TransactionReceipt? receipt;
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while (receipt == null) {
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receipt = await _client!.getTransactionReceipt(transactionHash);
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await Future.delayed(const Duration(seconds: 1));
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}
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// Print the receipt information
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log('Transaction Hash: ${receipt.transactionHash}');
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log('Block Hash: ${receipt.blockHash}');
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log('Block Number: ${receipt.blockNumber}');
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log('Gas Used: ${receipt.gasUsed}');
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/*
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Transaction Hash: [112, 244, 4, 238, 89, 199, 171, 191, 210, 236, 110, 42, 185, 202, 220, 21, 27, 132, 123, 221, 137, 90, 77, 13, 23, 43, 12, 230, 93, 63, 221, 116]
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I/flutter ( 4474): Block Hash: [149, 44, 250, 119, 111, 104, 82, 98, 17, 89, 30, 190, 25, 44, 218, 118, 127, 189, 241, 35, 213, 106, 25, 95, 195, 37, 55, 131, 185, 180, 246, 200]
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I/flutter ( 4474): Block Number: 17120242
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I/flutter ( 4474): Gas Used: 21000
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*/
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// Wait for the transaction receipt to become available
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TransactionInformation? transactionInformation;
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while (transactionInformation == null) {
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log("********************************");
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transactionInformation = await _client!.getTransactionByHash(transactionHash);
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await Future.delayed(const Duration(seconds: 1));
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}
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// Print the receipt information
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log('Transaction Hash: ${transactionInformation.hash}');
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log('Block Hash: ${transactionInformation.blockHash}');
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log('Block Number: ${transactionInformation.blockNumber}');
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log('Gas Used: ${transactionInformation.gas}');
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/*
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Transaction Hash: 0x70f404ee59c7abbfd2ec6e2ab9cadc151b847bdd895a4d0d172b0ce65d3fdd74
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I/flutter ( 4474): Block Hash: 0x952cfa776f68526211591ebe192cda767fbdf123d56a195fc3253783b9b4f6c8
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I/flutter ( 4474): Block Number: 17120242
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I/flutter ( 4474): Gas Used: 53000
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*/
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}
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Future<EVMChainERC20Balance> fetchERC20Balances(
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EthereumAddress userAddress, String contractAddress) async {
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final erc20 = ERC20(address: EthereumAddress.fromHex(contractAddress), client: _client!);
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final balance = await erc20.balanceOf(userAddress);
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int exponent = (await erc20.decimals()).toInt();
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return EVMChainERC20Balance(balance, exponent: exponent);
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}
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Future<Erc20Token?> getErc20Token(String contractAddress, String chainName) async {
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try {
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final uri = Uri.https(
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'deep-index.moralis.io',
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'/api/v2.2/erc20/metadata',
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{
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"chain": chainName,
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"addresses": contractAddress,
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},
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);
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final response = await httpClient.get(
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uri,
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headers: {
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"Accept": "application/json",
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"X-API-Key": secrets.moralisApiKey,
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},
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);
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final decodedResponse = jsonDecode(response.body)[0] as Map<String, dynamic>;
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final symbol = (decodedResponse['symbol'] ?? '') as String;
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String filteredSymbol = symbol.replaceFirst(RegExp('^\\\$'), '');
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final name = decodedResponse['name'] ?? '';
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final decimal = decodedResponse['decimals'] ?? '0';
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final iconPath = decodedResponse['logo'] ?? '';
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return Erc20Token(
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name: name,
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symbol: filteredSymbol,
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contractAddress: contractAddress,
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decimal: int.tryParse(decimal) ?? 0,
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iconPath: iconPath,
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);
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} catch (e) {
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try {
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final erc20 = ERC20(address: EthereumAddress.fromHex(contractAddress), client: _client!);
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final name = await erc20.name();
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final symbol = await erc20.symbol();
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final decimal = await erc20.decimals();
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return Erc20Token(
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name: name,
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symbol: symbol,
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contractAddress: contractAddress,
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decimal: decimal.toInt(),
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);
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} catch (_) {}
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return null;
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}
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}
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Uint8List hexToBytes(String hexString) {
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return Uint8List.fromList(
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hex.HEX.decode(hexString.startsWith('0x') ? hexString.substring(2) : hexString));
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}
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void stop() {
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_client?.dispose();
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}
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Web3Client? getWeb3Client() {
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return _client;
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}
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// Future<int> _getDecimalPlacesForContract(DeployedContract contract) async {
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// final String abi = await rootBundle.loadString("assets/abi_json/erc20_abi.json");
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// final contractAbi = ContractAbi.fromJson(abi, "ERC20");
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//
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// final contract = DeployedContract(
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// contractAbi,
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// EthereumAddress.fromHex(_erc20Currencies[erc20Currency]!),
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// );
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// final decimalsFunction = contract.function('decimals');
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// final decimals = await _client!.call(
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// contract: contract,
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// function: decimalsFunction,
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// params: [],
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// );
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//
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// int exponent = int.parse(decimals.first.toString());
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// return exponent;
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// }
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}
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