ethereum address

ethereum-address.js

const BN = require('bn.js');
const EC = require('elliptic').ec;
const keccak256 = require('js-sha3').keccak256;

const sk = new BN('616E6769652E6A6A706572657A616775696E6167612E6574682E6C696E6B0D0A', 16);

const ec = new EC('secp256k1'); // Elliptic curve used by Ethereum
const G = ec.g; // Elliptic curve generator point
// console.log(G.getX());

const qa = G.mul(sk); // EC multiplication for public point
const x = qa.getX().toBuffer(); // 32bit x coord of public point
const y = qa.getY().toBuffer(); // 32bit y coord of public point

const pk = Buffer.concat([x,y]); // 64 bit concatenation of EC multiplication
const kh = keccak256(pk);  // keccak256 hash of ECDSA public key

const ethereumAddress = Buffer.from(kh, 'hex').slice(-20).toString('hex');

console.log('address is', ethereumAddress);