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IOS-7628 Move staking-related logic from txbuilder into helper
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BlockchainSdk/Blockchains/Ethereum/EthereumStakeKitTransactionHelper.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| // | ||
| // EthereumStakeKitTransactionHelper.swift | ||
| // BlockchainSdk | ||
| // | ||
| // Created by Dmitry Fedorov on 16.08.2024. | ||
| // Copyright © 2024 Tangem AG. All rights reserved. | ||
| // | ||
|
|
||
| import Foundation | ||
| import WalletCore | ||
| import BigInt | ||
|
|
||
| struct EthereumStakeKitTransactionHelper { | ||
| func prepareForSign( | ||
| _ stakingTransaction: StakeKitTransaction, | ||
| transactionBuilder: EthereumTransactionBuilder | ||
| ) throws -> Data { | ||
| let input = try buildSigningInput( | ||
| stakingTransaction: stakingTransaction, | ||
| transactionBuilder: transactionBuilder | ||
| ) | ||
| let preSigningOutput = try transactionBuilder.buildTxCompilerPreSigningOutput(input: input) | ||
| return preSigningOutput.dataHash | ||
| } | ||
|
|
||
| func prepareForSend( | ||
| stakingTransaction: StakeKitTransaction, | ||
| transactionBuilder: EthereumTransactionBuilder, | ||
| signatureInfo: SignatureInfo | ||
| ) throws -> Data { | ||
| let input = try buildSigningInput( | ||
| stakingTransaction: stakingTransaction, | ||
| transactionBuilder: transactionBuilder | ||
| ) | ||
| let output = try transactionBuilder.buildSigningOutput(input: input, signatureInfo: signatureInfo) | ||
| return output.encoded | ||
| } | ||
|
|
||
| private func buildSigningInput( | ||
| stakingTransaction: StakeKitTransaction, | ||
| transactionBuilder: EthereumTransactionBuilder | ||
| ) throws -> EthereumSigningInput { | ||
| let compiledTransactionData = Data(hex: stakingTransaction.unsignedData) | ||
| let compiledTransaction = try JSONDecoder().decode( | ||
| EthereumCompiledTransaction.self, | ||
| from: compiledTransactionData | ||
| ) | ||
|
|
||
| guard let amountValue = stakingTransaction.amount.bigUIntValue else { | ||
| throw EthereumTransactionBuilderError.invalidAmount | ||
| } | ||
|
|
||
| guard let gasLimit = BigUInt(compiledTransaction.gasLimit, radix: 16), | ||
| let baseFee = BigUInt(compiledTransaction.maxFeePerGas, radix: 16), | ||
| let priorityFee = BigUInt(compiledTransaction.maxPriorityFeePerGas, radix: 16) else { | ||
| throw EthereumTransactionBuilderError.feeParametersNotFound | ||
| } | ||
|
|
||
| return try transactionBuilder.buildSigningInput( | ||
| // TODO: refactor, 'user' field is used only in erc20Transfer, consider moving elsewhere? | ||
| destination: .contract(user: "", contract: compiledTransaction.to, value: amountValue), | ||
| fee: Fee( | ||
| stakingTransaction.fee.amount, | ||
| parameters: EthereumEIP1559FeeParameters(gasLimit: gasLimit, baseFee: baseFee, priorityFee: priorityFee) | ||
| ), | ||
| parameters: EthereumTransactionParams( | ||
| data: Data(hex: compiledTransaction.data), | ||
| nonce: compiledTransaction.nonce | ||
| ) | ||
| ) | ||
| } | ||
| } |
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