metamask-extension/test/e2e/send-eth-with-private-key-test/send-eth-with-private-key.js

/* eslint-disable */
var Tx = ethereumjs.Tx
var privateKey = ethereumjs.Buffer.Buffer.from('53CB0AB5226EEBF4D872113D98332C1555DC304443BEE1CF759D15798D3C55A9', 'hex')

const web3 = new Web3(new Web3.providers.HttpProvider(`http://localhost:8545`))

const sendButton = document.getElementById('send')

sendButton.addEventListener('click', function () {
  var rawTx = {
    nonce: '0x00',
    gasPrice: '0x09184e72a000',
    gasLimit: '0x22710',
    value: '0xde0b6b3a7640000',
    to: document.getElementById('address').value,
  }
  var tx = new Tx(rawTx);
  tx.sign(privateKey);

  var serializedTx = tx.serialize();

  web3.eth.sendSignedTransaction('0x' + serializedTx.toString('hex')).on('receipt', (transactionResult) => {
    document.getElementById('success').innerHTML = `Successfully sent transaction: ${transactionResult.transactionHash}`
  })
})