A comprehensive guide to building a production-ready SaaS payment system beyond the basic checkout page. Covers database schema design with Drizzle ORM and PostgreSQL, creating Stripe products programmatically, building checkout flows with session claiming, securing webhooks with signature verification, and processing post-payment work using Inngest's durable execution model. Also covers handling full and partial refunds with automatic access revocation, recovering abandoned checkouts with delayed emails using step.sleep(), and sending transactional emails with React Email and Resend. Every code example comes from a production application.
Table of contents
Table of ContentsPrerequisitesHow to Design the Payment Database SchemaHow to Create Stripe Products and PricesHow to Build the Checkout FlowHow to Handle Webhooks SecurelyHow to Process Purchases with Durable Background JobsHow to Handle RefundsHow to Recover Abandoned CheckoutsHow to Send Transactional Emails with React EmailHow to Test the Complete Flow LocallyConclusionSort: