Rainbet provably fair: the one claim you can test
Provably fair means a round's result is committed to before you bet, in a form that cannot be altered afterwards, and that you can confirm later. It applies to the Rainbet Originals, and it is the only statement on this site that does not ask for your trust.
Three inputs
| Input | Set by | Visible when |
|---|---|---|
| Client seed | You | Always, and changeable |
| Server seed | Rainbet | As a hash before the bet; in full after rotation |
| Nonce | The system | Increments with each bet |
Why a hash is enough
Hashing is one-way: the hash can be computed from the seed, but the seed cannot be recovered from the hash. Showing you the hash before the bet therefore reveals nothing about the result, while binding the operator to a value that cannot be swapped afterwards. If the revealed seed does not hash to what you were shown, something changed — and you would be able to tell.
Verifying a past bet
- Rotate the seed pair; the previous server seed is revealed.
- Hash it and compare against the value shown before you played. They must match.
- Run the client seed, server seed and nonce through the verification tool.
- The output must equal the result you were given.
What it does not cover
Slots and live tables are outside this mechanism; they rest on independent laboratory audits instead. Only the Rainbet Originals work this way — which is why is Rainbet legit treats the two as different kinds of assurance.
Frequently asked questions
What does provably fair mean?
The result is committed to as a hash before your bet and can be verified afterwards from the seed pair and nonce.
How do I verify a bet?
Rotate the seed pair, confirm the revealed server seed hashes to the value shown earlier, then re-run the seeds and nonce through the tool.
Are slots provably fair?
No. They rely on independent audits of the provider's random number generator.
Can a result be changed after I bet?
Not on an Original. The commitment is published before play and must match on reveal.
Commit, then reveal
One-way hashing is what makes it testable.