mirror of
https://github.com/cake-tech/cake_wallet.git
synced 2025-06-28 12:29:51 +00:00
107 lines
4.2 KiB
Dart
107 lines
4.2 KiB
Dart
import 'package:cw_core/crypto_currency.dart';
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import 'package:cw_ethereum/deuro/deuro_savings_contract.dart';
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import 'package:cw_ethereum/ethereum_wallet.dart';
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import 'package:cw_evm/contract/erc20.dart';
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import 'package:cw_evm/evm_chain_transaction_priority.dart';
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import 'package:cw_evm/pending_evm_chain_transaction.dart';
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import 'package:web3dart/crypto.dart';
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import 'package:web3dart/web3dart.dart';
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const String savingsGatewayAddress = "0x073493d73258C4BEb6542e8dd3e1b2891C972303";
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const String dEuroAddress = "0xbA3f535bbCcCcA2A154b573Ca6c5A49BAAE0a3ea";
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const String frontendCode = "0x00000000000000000000000000000000000000000043616b652057616c6c6574";
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class DEuro {
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final SavingsGateway _savingsGateway;
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final ERC20 _dEuro;
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final EthereumWallet _wallet;
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DEuro(EthereumWallet wallet)
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: _wallet = wallet,
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_savingsGateway = _getSavingsGateway(wallet.getWeb3Client()!),
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_dEuro = _getDEuroToken(wallet.getWeb3Client()!);
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static SavingsGateway _getSavingsGateway(Web3Client client) => SavingsGateway(
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address: EthereumAddress.fromHex(savingsGatewayAddress),
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client: client,
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);
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static ERC20 _getDEuroToken(Web3Client client) => ERC20(
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address: EthereumAddress.fromHex(dEuroAddress),
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client: client,
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);
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EthereumAddress get _address => EthereumAddress.fromHex(_wallet.walletAddresses.primaryAddress);
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Future<BigInt> get savingsBalance async =>
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(await _savingsGateway.savings(accountOwner: _address)).saved;
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Future<BigInt> get accruedInterest => _savingsGateway.accruedInterest(accountOwner: _address);
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Future<BigInt> get interestRate => _savingsGateway.currentRatePPM();
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Future<BigInt> get approvedBalance => _dEuro.allowance(_address, _savingsGateway.self.address);
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Future<PendingEVMChainTransaction> depositSavings(
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BigInt amount, EVMChainTransactionPriority priority) async {
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final signedTransaction = await _savingsGateway.save(
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(amount: amount, frontendCode: hexToBytes(frontendCode)),
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credentials: _wallet.evmChainPrivateKey,
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);
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final fee = await _wallet.calculateActualEstimatedFeeForCreateTransaction(
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amount: amount,
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contractAddress: _savingsGateway.self.address.hexEip55,
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receivingAddressHex: _savingsGateway.self.address.hexEip55,
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priority: priority,
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data: _savingsGateway.self.abi.functions[17].encodeCall([amount, hexToBytes(frontendCode)]),
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);
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final sendTransaction = () => _wallet.getWeb3Client()!.sendRawTransaction(signedTransaction);
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return PendingEVMChainTransaction(
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sendTransaction: sendTransaction,
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signedTransaction: signedTransaction,
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fee: BigInt.from(fee.estimatedGasFee),
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amount: amount.toString(),
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exponent: 18);
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}
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Future<PendingEVMChainTransaction> withdrawSavings(
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BigInt amount, EVMChainTransactionPriority priority) async {
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final signedTransaction = await _savingsGateway.withdraw(
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(target: _address, amount: amount, frontendCode: hexToBytes(frontendCode)),
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credentials: _wallet.evmChainPrivateKey,
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);
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final fee = await _wallet.calculateActualEstimatedFeeForCreateTransaction(
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amount: amount,
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contractAddress: _savingsGateway.self.address.hexEip55,
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receivingAddressHex: _savingsGateway.self.address.hexEip55,
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priority: priority,
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data: _savingsGateway.self.abi.functions[17].encodeCall([amount, hexToBytes(frontendCode)]),
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);
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final sendTransaction = () => _wallet.getWeb3Client()!.sendRawTransaction(signedTransaction);
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return PendingEVMChainTransaction(
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sendTransaction: sendTransaction,
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signedTransaction: signedTransaction,
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fee: BigInt.from(fee.estimatedGasFee),
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amount: amount.toString(),
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exponent: 18);
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}
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// Set an infinite approval to save gas in the future
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Future<PendingEVMChainTransaction> enableSavings(EVMChainTransactionPriority priority) async =>
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(await _wallet.createApprovalTransaction(
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BigInt.parse(
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'ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff',
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radix: 16,
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),
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_savingsGateway.self.address.hexEip55,
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CryptoCurrency.deuro,
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priority,
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)) as PendingEVMChainTransaction;
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}
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