Webhook Setup

const express = require('express');
const jose = require('node-jose');
const app = express();

app.use(express.json());

app.post('/webhooks/modulus', async (req, res) => {
  try {
    // Extract encrypted payload
    const { data } = req.body;

    if (!data) {
      return res.status(400).json({ error: 'Missing data field' });
    }

    // Decrypt JWE payload
    const keystore = jose.JWK.createKeyStore();
    await keystore.add(process.env.MODULUS_SECRET_KEY, 'oct');

    const result = await jose.JWE.createDecrypt(keystore).decrypt(data);
    const payload = JSON.parse(result.plaintext.toString());

    // Process webhook based on action
    if (payload.action === 'QRPH_SUCCESS') {
      await handleSuccessfulPayment(payload);
    } else if (payload.action === 'QRPH_DECLINED') {
      await handleDeclinedPayment(payload);
    }

    // Always respond with 200 OK quickly
    res.status(200).json({ received: true });

  } catch (error) {
    console.error('Webhook processing error:', error);
    res.status(500).json({ error: 'Internal server error' });
  }
});

async function handleSuccessfulPayment(payload) {
  // Update order status in database
  // Send confirmation email
  // Trigger fulfillment process
  console.log('Payment successful:', payload.referenceNumber);
}

async function handleDeclinedPayment(payload) {
  // Update order status to failed
  // Notify customer
  console.log('Payment declined:', payload.referenceNumber);
}

app.listen(3000, () => {
  console.log('Webhook server running on port 3000');
});

curl -X POST https://webhooks.sbx.moduluslabs.io/v1/webhooks \
  -u sk_your_secret_key: \
  -H "Content-Type: application/json" \
  -d '{
    "webhookUrl": "https://your-domain.com/webhooks/modulus",
    "actions": ["QRPH_SUCCESS", "QRPH_DECLINED"],
    "status": "ENABLED"
  }'

curl -X POST https://webhooks.sbx.moduluslabs.io/v1/webhooks/qrph/simulate \
  -u sk_your_secret_key: \
  -H "Content-Type: application/json" \
  -d '{
    "useCase": "SUCCESS"
  }'