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signETH.js

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const { Keychain, KeychainWeb3 } = require('../lib'); // require('keychain.js') if you run it outside of keychain.js repository

const Web3 = require('web3');

const web3 = new Web3('YOUR_API_URL'); // https://ropsten.infura.io/v3/046804e3dd3240b09834531326f310cf

const tx = {

to: '0xE8899BA12578d60e4D0683a596EDaCbC85eC18CC',

value: 100,

gas: 21000

};

const keychain = new Keychain();

const keychainWeb3 = new KeychainWeb3(keychain, web3);

keychain.selectKey()

.then(publicKey => keychainWeb3.signTransaction(tx, publicKey))

// uncomment to broadcast the transaction

// .then(result => web3.eth.sendSignedTransaction(result.rawTransaction)

// .on('transactionHash', (hash) => {

// const txId = `https://ropsten.etherscan.io/tx/${hash}`;

// console.log('tx', txId);

// })

// .on('error', (err) => {

// console.error(err)

// })

// );