Fairness Component

A fair bet requires fair random numbers. As CryptoMania strives to set the bar in what concerns decentralized slot machines’ security, fairness, and user experience, we chose to use the Mersenne Twister algorithm for our Random Number Generation (RNG) method.

The Mersenne Twister algorithm is the only pseudo-RNG method approved by the international casino industry, and as far as we know, we are the only DApp to have implemented it. Hence, CryptoMania games are not only provably fair, but also meet the highest standards employed in the international casino industry.

Checking the Fairness:

For every wager you make you will receive a ‘maniaresult’ blockchain receipt which contains the information needed to verify the game’s fairness.


rand - An hexadecimal (Hex) random number, generated by the game.

fair_hash - SHA hash of rand value, submitted by the game before a player spins the reels.

player_rand - Six comma separated random numbers, submitted by a player upon spinning the reels.

Step 1

The six random numbers generated by the game can be extracted from the rand value. First, we need to find the 4 digits Hex numbers - First number starts from 0 position, second from 8th, third from 16th, and so on.

rand: 0013dfc40013370f0000320a0006fa300007be46004db5ae475b491b1087bd08

  • Then, we need to convert the Hex value to their decimal form:

  • 0013 hex = 19

  • 0013 hex = 19

  • 0000 hex = 0

  • 0006 hex = 6

  • 0007 hex = 7

  • 004d hex = 77

Game RN (rand): 19, 19, 0, 6, 7, 77
Player RN (player_rand): 5,62,34,29,99,15

Step 2

Each slot game and each individual reel has a fixed number of possible positions. For simplicity, we will name this number the ‘Max Reel Position’. In our first slot machine we have five reels with the following ‘Max Reel Position’ (fixed numbers):

  • Reel 1: 132

  • Reel 2: 365

  • Reel 3: 298

  • Reel 4: 365

  • Reel 5: 123

To calculate the final result which will determine the reels’ positions, we will use the following function:

Reel position = (‘Player RN’ + ‘Game RN’) mod ‘Max Reel Position’
Player RN Game RN Max Reel Position Wining RN Result
Reel 1 (0-132) 5 9 132 24
Reel 2 (0-365) 62 19 365 81
Reel 3 (0-298) 34 0 298 34
Reel 4 (0-365) 29 6 365 35
Reel 5 (0-123) 99 7 123 106
Mega Bonus Draw 15 77 199 92
What is mod in math example?

For example, “24 mod 133 = 24” which means 24 is the remainder when you divide 24 by 133. Likewise, 133 mod 24 = 13, 13 is the remainder when you divide 133 by 24.

Step 3

Now it is time to see how the RN results translates to the slot’s reels position. The first 5 RN result numbers (24, 81, 34, 35, 106) will be applied to the slot game, while the last number (92) will be used to determine the results for the Mega Bonus events (every 10 EOS accumulated wager).

The RN result numbers are effectively the index numbers the slot reels will land on. Each index number is represented by a predetermined slot symbol, when the reels stop spinning, the uppermost symbol showing on each reel is the one corresponding to the index number, followed by the two following index number symbols.


Here are the five first index positions for the first CryptoMania slot game:

Index Position Reel 1 Reel 2 Reel 3 Reel 4 Reel 5

If RN Result for ‘reel 1’ = 0

Then, reel 1 will return symbols #0-1-2:




If RN Result for ‘reel 3’ = 298

Then, reel 3 will return symbols #298-0-1:




Download index position spreadsheet for CryptoMania's 1st slot machine >>
Mega Bonus Verification

The Mega Bonus mechanism works in a similar way to how blockchain Dice games work. Depending on your bet amount and the corresponding ‘winning chance %’, the 6th random number result has to fall within the winning RN range in order to win the Mega Bonus:

Bet Amount Winning Chance % Winning 'RN Result'
0.1-10 2.5% 0-4
20 5.0% 0-9
50 12.5% 0-24
100 25% 0-49
200 50% 0-99
400 100% 0-199

Mining Info

Level: # / 30

Mined: #,###,### Mania

Progress: ##.##%

Mining bonus per cycle: ###.#

Round 1: ##.#

Round 2: ##.#

Round 3: ##.#

Round 4: ##.#

*1 Cycle = 4 rounds
1 Round = 10 coins bet accumulated
Next Level mining per cycle: ###.#

Mega Bonus Prize:

0000 mania

Bet Amount Winning Chance
0.1-10 2.50%
20 5.00%
50 12.50%
100 25.00%
200 50.00%
400 100%

Mega Bonus Draw History

Draw ID Level Prize Bet Amount Winning Chance Result
# 0 0.00 0.000 0.00 -

Please open Scatter desktop and try again.

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Play via one of our
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Invite your friends to play and reward them with 20% extra mining bonus

on their first 40 eos wagered!

For every new player that joins via your unique link, you will earn:
  • 1. 0.2% lifetime commision on all their wagers
  • 2.10% extra Mania bonus on all Mania mined by your referral.

My Status: VIP 0

VIP status entitles to an immediate cashback of up to 0.4% on all wagers. The VIP status is calculated and granted/withdrawn on a weekly basis:

VIP level Weekly wager volume Cashback
1 200 EOS 0.1%
2 400 EOS 0.2%
3 800 EOS 0.3%
4 2000 EOS 0.4%

My current weekly volume: XXXX EOS

Calculated: Monday 00:00:00 (UTC)

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If you reside in a location where lottery, gambling, sports betting or betting over the internet is illegal, please do not click on anything related to these activities on this site. Users of CryptoMania platform should be 21 and above and be advised on local regulations that apply to him or her. CryptoMania is an entertainment platform for social gaming and should not be perceived as an investment or as gambling. Cryptocurrencies and online gaming laws and regulations vary from country to country and are changing in a rate that CryptoMania platform cannot predict. Please refer to the laws within your jurisdiction to ensure the legality of your actions. CryptoMania team does not, in any case, attempt to instigate or induce players to violate the laws and regulations of any countries and regions. Please proceed with prudence and do not participate if any of that risks cannot be afforded.