Payment Integration Setup (Stripe) (Pair programming)

[thaninbew]

Duration: 2 weeks

We're setting up Stripe for the repository, please also take time to look at the documentation!

Tasks:

1. Read Stripe docs
2. Install Stripe dependencies: yarn add stripe @nestjs/config
3. Create apps/backend/src/payments/ directory
4. Create payments.module.ts with Stripe configuration
5. Create payments.service.ts with methods: - createPaymentIntent(amount, currency, metadata)
   • createSubscription(customerId, priceId, interval)
   • retrievePaymentIntent(paymentIntentId)
6. Add environment variables (Use your own key for now):
   • STRIPE_SECRET_KEY
   • STRIPE_WEBHOOK_SECRET
   • STRIPE_PUBLISHABLE_KEY
7. Add to example.env
8. Add documentation STRIPE.MD
9. Write unit tests with Stripe mock

Acceptance Criteria:

• Stripe SDK configured and working
• PaymentsService can create test payment intents
• Environment variables + implementation is well-documented
• Tests pass with mocked Stripe client

[SamNie2027]

It seems that the subscription interval is actually already built into the price item so just supplying the priceId should be enough