Testing a Rainbet provably fair result yourself
Rainbet describes provably fair as locking in the outcome of a round before you place your bet, in a form that cannot be changed later, so that you can confirm it afterwards. It covers the Rainbet Originals, and it is the one statement on this site you can test yourself rather than take on trust.
The three inputs
| Input | Who sets it | When you can see it |
|---|---|---|
| Client seed | You | At all times, and you can change it |
| Server seed | Rainbet | Shown as a hash before the bet, and in full once it is rotated |
| Nonce | The system | Increases with every bet |
Why a hash is enough
A hash works in one direction only. It can be calculated from the seed, but the seed cannot be worked out from the hash. So seeing the hash before you bet tells you nothing about the outcome, yet it ties the operator to a value that cannot be replaced later. Should the revealed seed fail to produce the hash you were shown, something has changed, and you could spot it.
How to verify a past bet
- Rotate the seed pair, which reveals the previous server seed.
- Hash that seed and compare it with the value you saw before playing. The two must be identical.
- Enter the client seed, server seed and nonce into the verification tool.
- The result it returns must be the same as the one you received.
What it does not cover
Slots and live tables sit outside this mechanism. Rainbet says they rest on independent laboratory audits instead. The method applies only to the Rainbet Originals, which is why is Rainbet legit treats the two as different kinds of assurance.
Frequently asked questions
What is meant by provably fair?
The outcome is committed to as a hash before you bet, and afterwards it can be checked using the seed pair and the nonce.
How can I verify a bet?
Rotate the seed pair and confirm that the revealed server seed hashes to the value you were shown earlier. Then run the seeds and nonce through the tool again.
Are slots provably fair?
No. According to Rainbet, they rely on independent audits of the provider's random number generator.
Can the outcome be altered once I have bet?
Rainbet describes an Original as not allowing it: the commitment is published before play and has to match when the seed is revealed.
Commit first, reveal later
A one-way hash is what lets you test it.