Trusting your clients: live-coding a cross-platform multiplayer bingo app
summary
A live demo builds a cross platform bingo with Flutter and Firebase that runs without a custom server by storing game state in Cloud Firestore and using Cloud Firestore streams for real time updates. Players sign in with anonymous Firebase Auth, write a player doc under games/{game}/players, the host app creates cards and writes 24-number documents, draws numbers into the game doc, and validates claims with server timestamp validation. Demo reveals race conditions and scaling quirks during audience rounds.
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chapters (6)
- 0:00Introduction and setup
- 11:23Firebase project overview
- 25:27Security rules and authentication
- 32:36Generating bingo cards
- 36:50Drawing numbers and scoring
- 45:11Live bingo game and winners
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