Payment gateway integration

Skill VRIL-LABS/skill-jam/skills/ai-ml/claude-skills-main/claude-skills-main/plugins/payment-gateway-integration/skills/payment-gateway-integration

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Install

npx -y skills add VRIL-LABS/skill-jam --skill payment-gateway-integration

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Integrates payment processing with Stripe, PayPal, or Square including subscriptions, webhooks, and PCI compliance. Use when implementing checkout flows, recurring billing, or handling refunds and disputes.

SKILL.md

2.8 KB, as published. Nobody here has run it

Payment Gateway Integration

Integrate secure payment processing with proper error handling and compliance.

Stripe Integration (Node.js)

const stripe = require('stripe')(process.env.STRIPE_SECRET_KEY);

class PaymentService {
  async createPaymentIntent(amount, currency, customerId) {
    return stripe.paymentIntents.create({
      amount: Math.round(amount * 100), // Convert to cents
      currency,
      customer: customerId,
      automatic_payment_methods: { enabled: true }
    });
  }

  async createSubscription(customerId, priceId) {
    return stripe.subscriptions.create({
      customer: customerId,
      items: [{ price: priceId }],
      payment_behavior: 'default_incomplete',
      expand: ['latest_invoice.payment_intent']
    });
  }

  async refund(paymentIntentId, amount = null) {
    const params = { payment_intent: paymentIntentId };
    if (amount) params.amount = Math.round(amount * 100);
    return stripe.refunds.create(params);
  }
}

Webhook Handling

app.post('/webhooks/stripe', express.raw({ type: 'application/json' }), (req, res) => {
  const sig = req.headers['stripe-signature'];

  let event;
  try {
    event = stripe.webhooks.constructEvent(req.body, sig, process.env.STRIPE_WEBHOOK_SECRET);
  } catch (err) {
    return res.status(400).send(`Webhook Error: ${err.message}`);
  }

  switch (event.type) {
    case 'payment_intent.succeeded':
      await handlePaymentSuccess(event.data.object);
      break;
    case 'invoice.payment_failed':
      await handlePaymentFailed(event.data.object);
      break;
  }

  res.json({ received: true });
});

PayPal Integration

See references/paypal-integration.md for complete PayPal implementation with:

Order creation and capture
Refund processing
Webhook handling
Frontend SDK integration
Success/cancel callbacks

Security Checklist

Best Practices

Do:

Use official SDK libraries
Verify all webhook signatures
Log transaction IDs (not card data)
Test in sandbox environment
Handle all payment states
Implement proper error messages

Don't:

Process raw card data directly
Store sensitive payment info
Hardcode API keys
Skip webhook signature validation
Ignore failed payment events
Use test keys in production