如何使用web3swift实现GoerliETH钱包间转账？

基于你已有的余额查询代码，下面是添加转账交易创建、签名、广播的完整实现：

完整整合代码 #

import web3swift
import BigInt

struct Wallet {
    let address: String
    let data: Data
    let name: String
    let isHD: Bool
}

struct HDKey {
    let name: String?
    let address: String
}

// 替换为你的实际参数
let password = "SOME_PASSWORD"
let privateKey = "MY_PRIVATE_KEY"
let infuraApiKey = "MY_API"
let recipientAddressStr = "0x_RECIPIENT_ADDRESS" // 接收方钱包地址

do {
    // --- 原有余额查询逻辑 ---
    let formattedKey = privateKey.trimmingCharacters(in: .whitespacesAndNewlines)
    guard let dataKey = Data.fromHex(formattedKey) else {
        print("私钥格式错误")
        return
    }
    let keystore = try EthereumKeystoreV3(privateKey: dataKey, password: password)
    guard let validKeystore = keystore, let address = validKeystore.addresses?.first?.address else {
        print("创建Keystore失败")
        return
    }
    let name = "MY_WALLET_NAME"
    let keyData = try JSONEncoder().encode(validKeystore.keystoreParams)
    let wallet = Wallet(address: address, data: keyData, name: name, isHD: false)
    
    let keystoreManager: KeystoreManager
    if wallet.isHD {
        guard let hdKeystore = BIP32Keystore(wallet.data) else {
            print("HD钱包解析失败")
            return
        }
        keystoreManager = KeystoreManager([hdKeystore])
    } else {
        guard let ethKeystore = EthereumKeystoreV3(wallet.data) else {
            print("非HD钱包解析失败")
            return
        }
        keystoreManager = KeystoreManager([ethKeystore])
    }
    
    let endpoint = "https://goerli.infura.io/v3/\(infuraApiKey)"
    guard let web3 = Web3(provider: Web3HttpProvider(URL(string: endpoint)!)) else {
        print("初始化Web3失败")
        return
    }
    web3.addKeystoreManager(keystoreManager)
    
    let walletAddress = EthereumAddress(wallet.address)!
    web3.transactionOptions.from = walletAddress
    web3.transactionOptions.chainID = 5
    
    // 查询余额
    let balanceResult = try web3.eth.getBalance(address: walletAddress)
    let balanceString = Web3.Utils.formatToEthereumUnits(balanceResult, toUnits: .eth, decimals: 3)!
    print("当前钱包余额：\(balanceString) ETH")
    
    // --- 新增转账逻辑 ---
    guard let recipientAddress = EthereumAddress(recipientAddressStr) else {
        print("接收方地址格式错误")
        return
    }
    
    // 1. 设置转账金额（ETH转Wei）
    let transferAmountEth = "0.01" // 替换为实际转账金额
    guard let transferAmountWei = Web3.Utils.parseToBigUInt(transferAmountEth, units: .eth) else {
        print("转账金额格式错误")
        return
    }
    
    // 2. 获取Gas参数
    let gasPrice = try web3.eth.getGasPrice()
    let gasLimit = BigUInt(21000) // ETH转账标准Gas Limit
    
    // 3. 配置交易选项
    var txOptions = TransactionOptions.defaultOptions
    txOptions.from = walletAddress
    txOptions.to = recipientAddress
    txOptions.value = transferAmountWei
    txOptions.gasPrice = .manual(gasPrice)
    txOptions.gasLimit = .manual(gasLimit)
    txOptions.chainID = 5
    
    // 4. 创建并签名交易
    let tx = try web3.eth.sendETH(options: txOptions)
    let signedTx = try tx.sign(password: password)
    
    // 5. 广播交易
    let txHash = try signedTx.send()
    print("交易已广播，哈希：\(txHash)")
    
} catch {
    print("操作失败：\(error.localizedDescription)")
}

关键说明 #

• 参数替换：将代码中的SOME_PASSWORD、MY_PRIVATE_KEY、MY_API、0x_RECIPIENT_ADDRESS替换为你的实际信息
• 金额转换：以太坊底层使用Wei作为最小单位，需通过Web3.Utils.parseToBigUInt将ETH转换为Wei
• Gas设置：ETH转账的标准gasLimit为21000，gasPrice通过节点获取建议值即可
• 错误处理：代码中用do-catch替代了原有的try!，避免运行时崩溃，便于排查问题
• 交易查询：拿到交易哈希后，可在Goerli区块浏览器中查询交易状态

内容的提问来源于stack exchange，提问作者CreatineA