Public Key

publicKey.js

/**
 *  "@ethereumjs/tx": "^5.1.0",
 *  "@ethereumjs/util": "^9.0.1",
 */

const { hexToBytes, bytesToHex } = require('@ethereumjs/util');
const { ecrecover } = require('@ethereumjs/util');
const { TransactionFactory } = require('@ethereumjs/tx');

// https://etherscan.io/tx/0x5ad6831e50960ffda005fc59c1970ce8fafaa3cff8b9d6695cd1f65cb3c2acf9
const txRaw = hexToBytes("0x02f87401822fc584b2eee28085064e6c8e9d82520894aea82a310c6dc710f438f1d9ad43df673dae408d872d2601128c800080c080a0ade1fb5fea776840fa1d35f28f89b047083e0f63ae214866bbb691ed4ddcc01ea04c59d6ed0122bf62384f069ad225bbe1072bc324936108eecceffb268c260050");

//const msgHash = hexToBytes("0xab05e7d121bf2bb6a1eea90ee057047c24b2682fba6127f3d2cf029898af1965");
const msgHash = TransactionFactory.fromSerializedData(txRaw).getHashedMessageToSign();

// from eth_getTransactionByHash
const v = BigInt(37); // 0 + (1 * 2 + 35)
const r = hexToBytes("0xade1fb5fea776840fa1d35f28f89b047083e0f63ae214866bbb691ed4ddcc01e");
const s = hexToBytes("0x4c59d6ed0122bf62384f069ad225bbe1072bc324936108eecceffb268c260050");

const publicKey = ecrecover(msgHash,v,r,s, BigInt(1));
console.log(`Public Key=${bytesToHex(publicKey)}`);