// middleware.js
const functions = require('firebase-functions');
import * as crypto from 'crypto';

export const auth = (req, res, next) => {
    let hash = crypto.createHash('sha512');
    hash.update(config.starling.key + req.rawBody));
    req.hasha = hash.digest('base64');

    // req.hasha is different from req.header('X-Hook-Signature')

    next();
}

import * as functions from 'firebase-functions';
import * as express from 'express';
import * as cors from 'cors';
import * as middleware from './middleware';
import bodyParser = require('body-parser');

const app = express();
app.use(cors({ origin: true }));
app.use(bodyParser.json());
app.use(middleware.auth);

// Endpoints removed for brevity

export const hooks = functions.https.onRequest(app);