📰 Dev.to · ShipTested

A checkout success redirect proves a browser reached a URL — not that anyone paid. Why entitlement must come from a verified event, not a redirect.

A page that shows only your rows is not proof the database rejects a request for someone else's. The two-account test every Supabase app needs before taking pay

A valid webhook signature does not make your handler idempotent. Replay one signed order webhook five times — you should still grant access exactly once.