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Provably Fair

Provably fair page description and how it works:

What is "provably fair"?

When you play in an online casino, there's always a fear that you might be cheated. In the cryptocurrency gambling community, there's a tool called "provably fair" that allows you to verify each game result to ensure you're not being cheated.


How does provably fair work?

  • Serverseed: This is a number provided by the site. You receive it in advance in encrypted form.

  • Clientseed: This is a number generated by your browser.

  • Nonce: This is a number that increases with each bet you make.

    • These three numbers are used to calculate the result of each game. After each bet, the "Nonce" increases by 1, making each result unique.


    How to verify results?

    • First Step: Make sure the Serverseed you received was actually used in the game.

    • Second Step: Compare the results you received on the site with those you can calculate yourself using Client seed, Private hash and Nonce.

      • If you have many bets, you can use special tools for automatic verification of all results.

      In order to verify the roll for items received with the current seed, you need to reveal server seed hash.

      Example:

      1. Need to use a HMAC generator.

      https://www.freeformatter.com/hmac-generator.html#before-output

      2. As string you should use:

      {cliendSeed}-{nonce}

      3. Secret key is:

      {PrivateHash}

      4. Use algorithm:

      SHA512

      5. Click compute HMAC, site will compute for you a HMAC

      6. Select first 13 chars from HMAC

      7. Now is necessary to convert these 13 chars from hexadecimal to DEC

      https://www.rapidtables.com/convert/number/hex-to-decimal.html

      8. Write formula in your browser or in other calculator 

      (Resulted decimal number Mod 1 000 000) / 10 000 =

      This formula will return resulted number and now you can verify if resulted number from provably fair is equal with resulted number from this formula.