The Cell Tower Meltdown
When thousands of students gather in one auditorium or underground seminar hall, 4G/5G mobile signals frequently drop to zero. Cloud-dependent ticketing apps freeze, and lines stall.
How Spark's Offline Architecture Operates - **Pre-Caching Registration Hashes**: Scanners download the encrypted list of valid ticket hashes before gates open. - **Local Validation**: Scanning and validation occur locally on the volunteer's phone in under 20 milliseconds. - **Background Sync**: When connection intermittently restores, check-in records sync automatically with the central server without interrupting the entry flow.
Topics covered in this guide:
#Offline-First#Local Cache#QR Scanner#Reliability
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