Editing Openai/69111a25-dab4-8000-8929-8d5e16a9da88 (section)

=== Install: ===

<syntaxhighlight lang="bash">npm init -y
npm install express body-parser stripe dotenv

</syntaxhighlight>

Create .env with:

<syntaxhighlight>STRIPE_SECRET_KEY=sk_test_xxx
PORT=3000

</syntaxhighlight>

server.js:

<syntaxhighlight lang="js">require('dotenv').config();
const express = require('express');
const bodyParser = require('body-parser');
const stripe = require('stripe')(process.env.STRIPE_SECRET_KEY);

const app = express();
app.use(bodyParser.json());

/**
 * Expect body:
 * { token: "<gateway token string>", amount: 1000, currency: "usd" }
 */
app.post('/charge', async (req, res) => {
  try {
    const { token, amount = 1000, currency = 'usd', description = 'Test Google Pay charge' } = req.body;
    if (!token) return res.status(400).json({error: 'missing token'});

    // Some Google Pay flows deliver token as JSON string. Attempt to parse if possible
    let parsedToken = token;
    try {
      parsedToken = JSON.parse(token);
    } catch (e) {
      // not JSON — leave as is (stripe can accept plain token)
    }

    // Create PaymentIntent using the token as a payment method
    // method: use payment_method_data with card.token
    const pi = await stripe.paymentIntents.create({
      amount,
      currency,
      payment_method_types: ['card'],
      payment_method_data: {
        type: 'card',
        card: {
          token: parsedToken
        }
      },
      confirm: true,
      capture_method: 'automatic',
      description
    });

    return res.json({ success: true, paymentIntent: pi.id, status: pi.status });
  } catch (err) {
    console.error(err);
    const message = err && err.raw && err.raw.message ? err.raw.message : err.message;
    return res.status(500).json({ error: message });
  }
});

app.listen(process.env.PORT || 3000, () => console.log('Server running on port', process.env.PORT || 3000));

</syntaxhighlight>

Warnings & tips:
* In test mode, use your Stripe test secret key. Confirm on Stripe dashboard.
* Different Google Pay flows may wrap the token into a JSON object (hence the JSON.parse attempt).
* If you get a payment_method or card parsing error, inspect the token structure in logs and adapt creation accordingly.
* For production you should create a PaymentIntent on the server first, then confirm on client with stripe.confirmCardPayment using the token; the example here is a simple server-side confirm for test.