Favro webhooks for nodejs

index.ts

import * as bodyParser from "body-parser";
import * as crypto from "crypto";
import {default as express, Request} from "express";

const app = express();

app.use(bodyParser.json()).post("/", (req: Request, res) => {
  const secretKey = "1234";
  const str = req.body.payloadId + req.body.hook.url;
  const sha1 = crypto.createHmac("sha1", secretKey);
  const signature = sha1.update(str).digest("base64");

  const valid = (req.headers["x-favro-webhook"] as string) === signature;
});

app.listen(3000);