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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 Serverseed, Clientseed, and Nonce.

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

      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:

      {ServerSeed}

      4. Use algorithm:

      SHA512

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

      6. Select first 5 chars from HMAC

      7. Now is necessary to convert these 5 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.