web3.js – 交易小结

app.js的完整内容,如下所示:

var Tx     = require('ethereumjs-tx').Transaction
const Web3 = require('web3')
const web3 = new Web3('https://ropsten.infura.io/v3/YOUR_INFURA_API_KEY')

const account1 = '0xf4Ab5314ee8d7AA0eB00b366c52cEEccC62d6B4B' // Your account address 1
const account2 = '0xff96B8B43ECd6C49805747F94747bFfa3A960b69' // Your account address 2

const pk1 = 'b75e2bcaec74857cf9bb6636d66a04784d4c0fcfd908f4a2bc213428eba5af0d' // 实际项目中应该从process.env.PRIVATE_KEY_1中读取
const pk2 = 'ac0adfdbaeb0770a479e79aac78779d82fdc2f9262e0c8f751ae70fb63ef6196' // 实际项目中应该从process.env.PRIVATE_KEY_2中读取

const privateKey1 = Buffer.from(pk1, 'hex')
const privateKey2 = Buffer.from(pk2, 'hex')

web3.eth.getTransactionCount(account1, (err, txCount) => {
  // 创建交易对象
  const txObject = {
    nonce:    web3.utils.toHex(txCount),
    to:       account2,
    value:    web3.utils.toHex(web3.utils.toWei('0.1', 'ether')),
    gasLimit: web3.utils.toHex(21000),
    gasPrice: web3.utils.toHex(web3.utils.toWei('10', 'gwei'))
  }

  // 签署交易
  const tx = new Tx(txObject, { chain: 'ropsten', hardfork: 'petersburg' })
  tx.sign(privateKey1)

  const serializedTx = tx.serialize()
  const raw = '0x' + serializedTx.toString('hex')

  // 广播交易
  web3.eth.sendSignedTransaction(raw, (err, txHash) => {
    console.log('txHash:', txHash)
    // 可以去ropsten.etherscan.io查看交易详情
  })
})

运行app.js:

$ node app

输出

txHash: 0x4167cc0e35a750032be89f3c319026a5e7b2f0f93ac5c659a660e85a88053edf

可以去etherscan,查看交易详情,如下图所示:

图



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