app.ts

import express, { Request, Response } from 'express'
import { WebhookUtils, InvalidSignatureError } from '@getopenpay/client'

const app = express()
const port = 8080

// Add your secret key from the webhook page here.
const WH_SECRET_KEY = ''

app.use(express.json())

app.get('/', (req: Request, res: Response) => {
  res.send('Hello World!')
})

const verifyWebhookRequest = (request: Request) => {
  const signature_digest = request.headers['signature-digest'] as string;
  if (!signature_digest) {
    throw new Error('Missing signature-digest header');
  }
  const webhookUtils = new WebhookUtils();

  try {
    webhookUtils.validatePayload(request.body.data, signature_digest, WH_SECRET_KEY);
    console.log('Webhook signature is valid');
  } catch (error) {
    if (error instanceof InvalidSignatureError) {
      console.error('Invalid webhook signature');
    } else {
      console.error('Error verifying webhook:', error);
    }
  }
}

app.post('/webhook', (req: Request, res: Response) => {
  console.log('Received webhook:', req.body)
  verifyWebhookRequest(req);
  res.status(200).json({ message: 'Webhook received successfully' })
})

app.listen(port, () => {
  console.log(`Example app listening on port ${port}`)
})