Hello again. I created new site with Gridcoin - Gridcoin roll game. And yes, it's gambling, place where you can bet your Gridcoin and lose them to me. It is working like freebitco.in and freedogeco.in - faucet and provably fair roll game. You need to claim multiple times (and multiple days) to reach min withdrawal amount. But I didn't created annoying offerings to play for now :).

Gambling is not disabled completely in my country, there are four areas where you can legally found casino. But I don't know where is my russian hosting located. Because of that I used foreight hosting for this project.

Well, even if you don't like gambling, you can use that site as faucet.

Math behind project

I used similar algorithms as freebitco.in (except for hash function):

$hash=hash("sha256","$server_seed.$user_seed");
$bytes=substr($hash,0,8);
$number=hexdec($bytes);
$roll=round($number/429496.7295);

It returns integer from 0 to 10000 inclusive. i.e. 10001 different results, but 0 and 10000 are least probable - 1/20000.

I did trials for free roll, here is results for 10 000 000 rolls:

   0-9885 98.85509 %
9886-9985  0.99841 %
9986-9992  0.08064 %
9993-9997  0.04038 %
9998-9999  0.02015 %
    10000  0.00533 %

Project status

• Project in beta now. That means I can change anything. But rolled amounts remained yours (except for unbelieveable luckyness).
• Deposits and withdrawals updated every 5 minutes.

Links

• URL: https://freegridco.in/
• Github: coming soon