How we built it: Running Replay on Temporal

What this post added

This post details the architecture and implementation of a conference registration system built on Temporal. It showcases how Workflows were used to manage the entire lifecycle of an order and individual tickets, from initial purchase through to event check-in. Key technical aspects include using Workflows for long-running, stateful processes, employing Activities for external integrations (payment processing, email, database), implementing idempotency for critical operations like payment charging, and leveraging Temporal's event history for debugging and auditing. The post also discusses the decision to use a separate Ticket Workflow per ticket to manage individual attendee lifecycles and avoid large event histories.