sign_verify.js

const crypto = require("crypto");

const sign = (data, key, method, route) => {
  var md = crypto.createHash("sha1");
  md.update(
    JSON.stringify(data)
      .concat(key.toString())
      .concat(method.toString())
      .concat(route.toString())
  );
  return md.digest("hex");
};

const verify = (data, key, method, route, hash) => {
  let hashToVerify = sign(data, key, method, route);
  return hashToVerify === hash;
};