Without a nonce, the same server seed and client seed would produce the same result every time. The nonce makes bet #0, bet #1, bet #2… each hash to something new and unpredictable.
What you need to know:
- The nonce usually restarts when you rotate your seed pair.
- Some casinos start at 0, others at 1. A verifier must use the same convention, or every result will look "wrong".
- In Plinko, one nonce covers one whole drop; the per-row numbers come from the same hash.
Example. Server seed S, client seed "alice": nonce 41 gives one drop, nonce 42 gives a completely unrelated drop. To verify bet #42, you need exactly S, "alice" and 42.
In ProvablyHero tools
Every drop in the demo shows its nonce; verifiers replay a drop from its nonce.