Nordstrom request signing

nordstrom.js

var CryptoJS = require("crypto-js");

function pad(number) {
  if (number<=999) { number = ("00"+number).slice(-3); }
  return number;
}

var timestamp =  (Math.floor(new Date() / 1000)) + "." + pad(new Date() % 1000);
var deviceId = "8A6A3699-1527-4E52-8441-7AA9AAD529F4";
var path = "/v2/authorizationservice/shopperauth";
var salt = "NOR1";

var step1 = CryptoJS.HmacSHA256(timestamp, salt);
var step2 = CryptoJS.HmacSHA256(deviceId, step1);
var step3 = CryptoJS.HmacSHA256(path, step2).toString(CryptoJS.enc.Base64);

console.log('ts: ', timestamp);
console.log(step3);