Check-In

Each scanner connects to a specific event via a Scanner Pairing code that expires after 24h for security.

Check-in is a single atomic server-side operation — if two scanners try to admit the same ticket at once, only one succeeds; the other gets ALREADY_USED along with the time/gate of the winning scan.

Scanner access carries no financial data or data about other events — that's a deliberately limited access for security.