Implementing EIP-155 using Ethers.js v5.7

eip155_demo.js

/// eip155 https://github.com/ethereum/EIPs/blob/master/EIPS/eip-155.md
/// use ethers v5.7
const ethers = require('ethers')
const CHAIN_ID = 1

async function main() {
	// private key
	let private_key =
		'0x4646464646464646464646464646464646464646464646464646464646464646'
	let wallet = new ethers.Wallet(private_key)
	console.log('wallet address : ', wallet.address)
	// nonce = 9, gasprice = 20 * 10**9, startgas = 21000, to = 0x3535353535353535353535353535353535353535, value = 10**18, data=''
	let sign_data = {
		nonce: 9,
		gasPrice: 20 * 10 ** 9,
		gasLimit: 21000,
		to: '0x3535353535353535353535353535353535353535',
		value: ethers.utils.parseEther('1.0'),
		data: '',
		chainId: CHAIN_ID,
	}

	// sign the transaction
	// 0xec098504a817c800825208943535353535353535353535353535353535353535880de0b6b3a764000080018080
	let unsigned_tx = ethers.utils.serializeTransaction(sign_data)
	console.log('unsigned_tx : ', unsigned_tx)

	// NOTICE： this unsigned_tx_hash will send to keystone for signing
	// 0xdaf5a779ae972f972197303d7b574746c7ef83eadac0f2791ad23db92e4c8e53
	let unsigned_tx_hash = ethers.utils.keccak256(unsigned_tx)
	console.log('unsigned_tx_hash : ', unsigned_tx_hash)

	// simulate keystone sign
	const signingKey = new ethers.utils.SigningKey(private_key)
	const keystone_sigature = signingKey.signDigest(unsigned_tx_hash)
	const keystone_signature_string =
		ethers.utils.joinSignature(keystone_sigature)
	console.log('signature : ', keystone_signature_string)

	// split signature to r, s, v
	const signature = ethers.utils.splitSignature(keystone_signature_string)
	let r = signature.r
	let s = signature.s
	let v = signature.v

	console.log('r : ', r)
	console.log('s : ', s)
	console.log('v : ', v)

	const r_number = ethers.BigNumber.from(r)
	const r_string = r_number.toString()
	// 18515461264373351373200002665853028612451056578545711640558177340181847433846
	console.log('r_string : ', r_string)

	const s_number = ethers.BigNumber.from(s)
	const s_string = s_number.toString()
	// 46948507304638947509940763649030358759909902576025900602547168820602576006531
	console.log('s_string : ', s_string)

	const v_number = ethers.BigNumber.from(v.toString())
	const v_string = v_number.toString()
	console.log('v_string : ', v_string)

	// serialize the signed transaction
	// 0xf86c098504a817c800825208943535353535353535353535353535353535353535880de0b6b3a76400008025a028ef61340bd939bc2195fe537567866003e1a15d3c71ff63e1590620aa636276a067cbe9d8997f761aecb703304b3800ccf555c9f3dc64214b297fb1966a3b6d83
	const signed_tx = ethers.utils.serializeTransaction(sign_data, {
		r: r,
		s: s,
		v: v,
	})
	console.log('signed_tx : ', signed_tx)

	// send the transaction
	try {
		const public_eth_rpc = 'https://rpc.ankr.com/eth'
		const provider = new ethers.providers.JsonRpcProvider(public_eth_rpc)
		const txResult = await provider.sendTransaction(signed_tx)
		return txResult.hash
	} catch (e) {
		console.log(e)
	}
}

main()
	.then(() => process.exit(0))
	.catch((error) => {
		console.error(error)
		process.exit(1)
	})