Floor Is Lava: Developer Diary | Moving the Coin Economy Server-Side (July 15, 2026)

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Wednesday, July 15, 2026


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Moving the economy server-side

A major hardening pass against the cheating vulnerability found on July 11-12: new Firebase database rules plus a server-side script handling Paddle payments, so the client can no longer manipulate purchases directly. Premium and remove-ads flags are now write-once from the client’s perspective; resend the same value, but never change it unilaterally. A hard cap (~5,000+ per write) limits how much the piggy bank or coin balance can move in a single write.

Four server-side functions now sit behind an admin layer the client can’t reach directly: the Paddle webhook, a mystery-box claim with an atomic daily gate, and a piggy-bank transfer function with a plausibility ceiling.

The failsafe catches a real (self-inflicted) exploit

Testing the new ceiling, an account with a cheat-inflated balance of roughly 665,000 coins failed to sync: exactly as designed, since the cap sits around 100,000 per session. Signing out and back in force-loaded the correct cloud value (around 300 coins), confirming the safeguard actually works under real conditions.

🎮 Game Rules Log: July 15, 2026

  • Coin economy, premium status, and remove-ads flag are now enforced server-side, not client-side
  • Per-write coin cap (~5,000+) and a per-session ceiling prevent large-scale balance inflation

Read what happens next in the dev diary: the next entry.

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