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How it worksWhat it paysRTPTest vectorsVerify

Provably Fair

  • How it works
  • What it pays
  • RTP
  • Test vectors
  • Verify
Provably FairRoulette

Roulette

One number from your seeds picks one of 37 pockets, 0 to 36, each equally likely. Every bet on the layout is settled against that pocket.

RTP
97.3%
Max win
36×
Verify a Roulette spinPlay Roulette
How it works

How a Roulette result is made.

  1. 1

    Commit

    We choose our server seed before you bet and show its fingerprint. This commits us to that seed.

  2. 2

    The draw

    Your seeds pick one of 37 equally likely pockets. Every bet on the layout settles against that pocket.

  3. 3

    Reveal

    Rotate your seed to reveal ours. Use both seeds and the bet number to recheck any past result.

The whole formula

result = HMAC-SHA256(serverSeed, clientSeed:nonce:round)

  • serverSeedOur seed, sealed until you rotate
  • clientSeedYour seed
  • nonceBet number, +1 each bet
  • roundExtra numbers, for games that need more
roulette.tsTypeScript
1export function roulettePocketFromFloat(float: number): number {
2  return Math.floor(float * 37);
3}
What it pays

Every outcome and what it pays.

Single zero wheel, 37 pockets
BetNumbers coveredChancePays
Straight up (one number)12.70%36×
Split (two numbers)25.41%18×
Street (a row of three)38.11%12×
Trio with zero (0, 1, 2 or 0, 2, 3)38.11%12×
Corner (four numbers)410.81%9×
First four (0, 1, 2, 3)410.81%9×
Six line (two rows)616.22%6×
Dozen1232.43%3×
Column1232.43%3×
Red or black1848.65%2×
Odd or even1848.65%2×
Low (1 to 18) or high (19 to 36)1848.65%2×
RTP

Return to player.

Theoretical RTP: 97.3%.

  1. A bet covering c pockets wins with chance:

    P = c / 37
  2. It returns 36 / c times the stake.

    (c / 37) × (36 / c) = 36 / 37 = 97.30%
Test vectors

Fixed inputs, known results.

Reproduce these results with the inputs below.

Verify

Check a Roulette spin.

Find it in your bet history or on any bet slip

What we check

  1. 01Our seed matches its fingerprint
  2. 02Your seed is mixed in
  3. 03Numbers are drawn
  4. 04Numbers become the result
  5. 05The result matches your bet

Everything is calculated in your browser.

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