DH secp256k1 nodejs

index.mjs

import { createECDH } from 'crypto'
import elliptic from 'elliptic'
import { deriveAddress } from 'ripple-keypairs'

const curve = 'secp256k1'
const secp256k1 = elliptic.ec(curve)

const bytesToHex = a => a.map(byteValue => ('0' + byteValue.toString(16)).slice(-2)).join('')
const getPublic = echdObj => bytesToHex(secp256k1.keyFromPrivate(echdObj.getPrivateKey()).getPublic().encodeCompressed())

const alice = {}
alice.privateKey = '000762EED5BA4F378FFA60621C6DEF72F4A0A579112ADA5F5D6B2A35EC27E893A5'
alice.ecdh = createECDH(curve).setPrivateKey(Buffer.from(alice.privateKey, 'hex'))
alice.publicKey = getPublic(alice.ecdh)
alice.address = deriveAddress(alice.publicKey)

const bob = {}
bob.privateKey = '001ACAAEDECE405B2A958212629E16F2EB46B153EEE94CDD350FDEFF52795525B7'
bob.ecdh = createECDH(curve).setPrivateKey(Buffer.from(bob.privateKey, 'hex'))
bob.publicKey = getPublic(bob.ecdh)
bob.address = deriveAddress(bob.publicKey)

alice.sharedSecret = alice.ecdh.computeSecret(Buffer.from(bob.publicKey, 'hex'), null, 'hex')
bob.sharedSecret = bob.ecdh.computeSecret(Buffer.from(alice.publicKey, 'hex'), null, 'hex')

console.log({ alice, bob })