What are provably fair games? A player’s introduction

A common approach: commit, play, reveal, verify.

Implementations differ, but a common model uses a server seed, a client seed, and a round counter called a nonce. Before play, the operator publishes a hash of the secret server seed. This acts as a commitment that can be checked when the seed is later revealed.

1. Commit. Save the server-seed hash shown before the round.
2. Play. The published method combines the inputs to produce a game result.
3. Reveal. The operator reveals the server seed later, often after a seed change.
4. Verify. Check the revealed seed against the saved hash, then reproduce the result with the recorded inputs and game rules.

For a concrete example of this model, see Stake’s published implementation. It is an example from another platform, not the specification for StackRoll or SlabRoll.

A verification label should lead somewhere.

Imagine you have finished a round and want to understand the result. A useful game explanation should tell you what to save, when the missing information becomes available, and where to run the check. If the explanation only says “provably fair,” you are still missing the practical steps.

For StackRoll, those are the questions we want our game documentation to answer. We also want to explain how the calculated result maps to what the player sees, rather than leave a gap between a technical output and the game.

What it does not tell you.

A verification method checks a defined part of a system. It is not a promise of a winning result or a substitute for reading the game’s odds and reward rules.

With a collectible game, there are other questions too: which card is involved, what its stated grade is, and how a reward is fulfilled. A reproducible game result does not, by itself, answer those questions. Our SlabRoll introduction separates the confirmed concept from the details still to be revealed.

Where StackRoll stands today.

Provably fair mechanics are part of the plan for StackRoll Originals and SlabRoll. The implementation, verifier, and detailed rules have not been published on this preview. We will need to explain the actual system when those details are ready; this guide introduces the concept only.

Flap Off is a separate free-play game with demo multipliers. It has no wagers or prizes, and this article does not claim it is a verified provably fair casino game.