0xProject ZRX relayer API generate SH3 (Keccak256) order hash

orderHash.js

const {soliditySHA3} = require('ethereumjs-abi')
const BN = require('bn.js')

const orderHash = soliditySHA3([
  'address',
  'address',
  'address',
  'address',
  'address',
  'address',
  'uint256',
  'uint256',
  'uint256',
  'uint256',
  'uint256',
  'uint256'
], [
  new BN('12459c951127e0c374ff9105dda097662a027093', 16), // exchange contract address
  new BN('9e56625509c2f60af937f23b7b532600390e8c8b', 16), // maker address
  new BN('a2b31dacf30a9c50ca473337c01d8a201ae33e32', 16), // taker address
  new BN('323b5d4c32345ced77393b3530b1eed0f346429d', 16), // maker token address
  new BN('ef7fff64389b814a946f3e92105513705ca6b990', 16), // taker token address
  new BN('b046140686d052fff581f63f8136cce132e857da', 16), // fee recipient
  new BN('10000000000000000', 10), // maker token amount
  new BN('20000000000000000', 10), // taker token amount
  new BN('100000000000000', 10), // maker fee
  new BN('200000000000000', 10), // taker fee
  new BN('42', 10), // expiration unix timestamp sec
  new BN('256', 10) // salt
])

console.log(orderHash.toString('hex')) // "0xabc67323774bdbd24d94f977fa9ac94a50f016026fd13f42990861238897721f"