How to refund a payment in Stripe

1const express = require('express');
2const stripe = require('stripe')(process.env.STRIPE_SECRET_KEY);
3
4const app = express();
5app.use(express.json());
6
7// Issue a refund
8app.post('/api/refunds', async (req, res) => {
9  try {
10    const { paymentIntentId, amount, reason } = req.body;
11
12    if (!paymentIntentId) {
13      return res.status(400).json({ error: 'paymentIntentId is required' });
14    }
15
16    const refundParams = {
17      payment_intent: paymentIntentId,
18      reason: reason || 'requested_by_customer',
19    };
20
21    // If amount is provided, do a partial refund
22    if (amount) {
23      refundParams.amount = amount; // in cents
24    }
25
26    const refund = await stripe.refunds.create(refundParams);
27
28    res.json({
29      id: refund.id,
30      amount: refund.amount / 100,
31      currency: refund.currency,
32      status: refund.status,
33      reason: refund.reason,
34    });
35  } catch (err) {
36    console.error('Refund error:', err.message);
37
38    if (err.code === 'charge_already_refunded') {
39      return res.status(400).json({ error: 'This payment has already been fully refunded.' });
40    }
41
42    res.status(500).json({ error: err.message });
43  }
44});
45
46// Get refund status
47app.get('/api/refunds/:id', async (req, res) => {
48  try {
49    const refund = await stripe.refunds.retrieve(req.params.id);
50    res.json({
51      id: refund.id,
52      amount: refund.amount / 100,
53      status: refund.status,
54      created: new Date(refund.created * 1000).toISOString(),
55    });
56  } catch (err) {
57    res.status(500).json({ error: err.message });
58  }
59});
60
61const PORT = process.env.PORT || 3000;
62app.listen(PORT, () => console.log(`Server on port ${PORT}`));