Medusa v2 Payment Processing

Before writing code

Fetch live docs:

1. Web-search site:docs.medusajs.com payment module for payment data model and service methods
2. Web-search site:docs.medusajs.com payment provider for the provider abstraction layer
3. Web-search site:docs.medusajs.com stripe payment for Stripe integration setup
4. Fetch https://docs.medusajs.com/resources/references/payment and review the IPaymentModuleService interface
5. Web-search medusajs v2 AbstractPaymentProvider 2026 for latest provider interface

Payment Module Architecture

Entity Relationships