eth-crypto/dist/es/public-key-by-private-key.js

Cryptographic functions for ethereum and how to use them with web3 and solidity

import { privateToPublic, hexToBytes, bytesToHex } from '@ethereumjs/util';
import { addLeading0x, removeLeading0x } from './util';

/**
 * Generate publicKey from the privateKey.
 * This creates the uncompressed publicKey,
 * where 04 has stripped from left
 * @returns {string}
 */
export function publicKeyByPrivateKey(privateKey) {
  privateKey = addLeading0x(privateKey);
  var publicKeyBuffer = privateToPublic(hexToBytes(privateKey));
  var ret = removeLeading0x(bytesToHex(publicKeyBuffer));
  return ret;
}