How Rainbet locks in a result before you bet
With Rainbet provably fair games, you can check that a result wasn't altered once your bet was placed. It covers the Rainbet Originals and relies on three values: a client seed, a server seed and a nonce.
What is meant by Rainbet provably fair?
Rainbet provably fair describes a round whose result is set before the bet is placed, and which you can confirm later with a check of your own. Taking Rainbet's word or a lab's report on trust isn't required. Either the maths matches or it doesn't.
Which three values are involved?
| Value | Who controls it | What it does |
|---|---|---|
| Client seed | You. You can change it whenever you like | Brings your own input into every result |
| Server seed | Rainbet. It is shown to you in hashed form before you bet | Rainbet's contribution, fixed ahead of time |
| Nonce | A counter. It begins at 0 and goes up by one with each bet | Gives each bet its own result |
Together, these three values produce a single result. Identical values always give the identical result, and that is why a check is possible.
What is the point of hashing the server seed?
A hash is a one-way fingerprint. Before you bet, Rainbet shows the fingerprint of its server seed. The seed can't be worked out from it, so results can't be predicted. Swapping the seed afterwards isn't possible either, since another seed would produce another fingerprint.
Once you rotate your seeds, the previous server seed is shown in full. If its hash equals the one you saw at the start, the seed stayed the same throughout.
How do you check a bet?
Rainbet lays out six steps, and they are the same on every Original.
- Go to the Fair Play tab on the game. Your active seeds appear there, and the server seed is hashed.
- Make a bet in the usual way.
- Rotate the seed pair. This shows the unhashed server seed that was used for your earlier bets.
- Open Bets and click the ID of the bet you wish to check.
- Click the Provably Fair link on that bet to view the values behind it.
- Confirm the result in the Verify tab, or run the game's published algorithm on your own.
Only bets placed with an already rotated seed pair can be checked. While a server seed is in use it remains hashed, which stops upcoming results from being worked out.
What do these terms stand for?
| Term | Meaning |
|---|---|
| Seed pair | Your client seed plus Rainbet's server seed |
| Hash | A one-way fingerprint of the server seed |
| Rotate | Move to a new seed pair, which shows the old server seed |
| Bet ID | The reference number of one bet in your Bets list |
| Fair Play tab | The panel on every Original where your seeds appear |
Which games use provably fair?
Each of the fifteen Rainbet Originals is provably fair and has a Fair Play tab on its game page. This includes Plinko, Mines, Dice, Limbo, Keno, Hilo, Chicken Cross, Coinflip and the remaining games listed on Rainbet Originals.
Rainbet's homepage also lists Case Battles and EOS Roulette as multiplayer games. Neither appears among the fifteen in the sidebar. Rainbet states that their randomness comes from EOS blockchain blocks and not from a seed pair.
Which games don't use provably fair?
Slots, live tables and software table games are not provably fair, because outside studios supply them. Rainbet says those providers use certified random number generators and live operations audited by independent labs. To see how each section works, read Rainbet slots and Rainbet live casino.
| Game type | How fairness is shown |
|---|---|
| Rainbet Originals | Seeds and a nonce you can check |
| Case Battles and EOS Roulette | EOS block data, as Rainbet states |
| Slots and software tables | The provider's certified RNG, according to Rainbet |
| Live tables | Not seed-checked. Rainbet says the providers' live operations are audited by independent labs. |
Will a different client seed help you win?
No. Another client seed produces a different run of results, not a better one. It exists for verification.
What is left out of provably fair?
Provably fair lets you compare the hash shown before a bet with the server seed revealed after you rotate, and recompute the result from the seeds and the nonce. The house edge is still there. Over time each Original returns less than the amount staked, at the RTP listed on its page. A fair game can still lose you money.
Run the check once
Following the six steps once on a small bet is the simplest way to see how the system works. Rainbet Dice is an easy game to read, as every bet comes down to one number. For a wider look at what is on record about the operator, read is Rainbet legit.
Questions and answers
What does Rainbet provably fair mean?
A system on the Rainbet Originals that sets each result before the bet using a client seed, a hashed server seed and a nonce, so you can verify the result afterwards.
How can I verify a Rainbet bet?
Go to the Fair Play tab, place bets, rotate the seed pair, open the bet in your Bets list, click its Provably Fair link and confirm the values in the Verify tab.
Is it possible to change my client seed at Rainbet?
Yes. You can edit the client seed whenever you like.
Do Rainbet slots use provably fair?
No. Slots, live tables and software table games depend on the providers' certified systems, according to Rainbet. Only the Originals are provably fair.
Will provably fair make me win more?
No. It shows that results weren't altered. The house edge doesn't change.
What does the nonce do in Rainbet provably fair?
It is a counter that begins at 0 and goes up by one per bet, giving every bet its own result.
Check a bet yourself
Every Original has a Fair Play tab.