What is the plan for checkout and payment flow?

[romanobichi]

How should payment processing be handled in this project?

[RainbowStar0619]

This is where most ecommerce systems get complex.
A production-ready approach usually involves:
external payment gateway like Stripe, Paypal, and sth.
backend order validation before payment confirmation
webhook handling for payment status updates
idempotent order creation (avoid duplicate charges)