SmartCanteen v4 is a comprehensive 26-table relational schema for a canteen reservation and wallet management platform supporting multi-location operations. The ERD spans user authentication with role-based access control, wallet and points systems with transaction tracking, canteen and table management with reservation states, and order fulfillment workflows. This architecture demonstrates soft-delete patterns, optimistic locking for concurrency, idempotency keys for payment safety, and trust-level mechanics to prevent no-shows. Fork this diagram to customize for your own multi-tenant hospitality or QSR platform, or download as .drawio to integrate into technical documentation and onboarding materials.