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2 Oct 2022 22:33:16 UTC

LOTTERY VALIDATION

Flow (FLOW)
Week: Sep 25, 2022
PREDICTED WINNING NUMBER
The predicted winning number changes each time a new player added and verified.
Not available. No players.
BASIC SEED
Random number of up to 128 digits, generated at the beginning of each week for each lottery.
66217381540959605347933246532951987101236979428855891898957047517063960344660040052102915575991502354302734176274218928790496834
COPY
TRANSACTION ID
Transaction ID of the last verified player.
Not available. No players.
TICKETS
Number of lottery tickets sold.
0
PLAYERS
Number of verified players.
0

How is the Winning Number Generated?

Lottocryptos uses a "Provably Fair" system for its lotteries to achieve transparency in the generation of winning numbers.

The seed of the winning random number generation is composed of four parts:

  • A - Random number up to 128 digits. It is generated weekly when the lottery begins and is different for each cryptocurrency.
  • B - The transaction ID of the last player. The transaction ID of the last verified player of the lottery.
  • C - The total number of lottery tickets sold in the lottery.
  • D - The number of verified players in the lottery.
  • To obtain the seed for the random generation of the winning number, the following process is followed.

    Each part is encrypted with SHA512 and concatenated. Then it is encrypted again with SHA512 and its characters are converted to their corresponding ASCII value. The seed used for the generation of the random number is this value.

    In order to be able to make all the checks considered appropriate, we provide users with the source code used to obtain the random number and the tools to perform a randomness test.

    SOURCE CODE
    File: classes/class.Random.php
    PHP Version: 8.0.18
    Last Update: Sep 17, 2022 10:57:44 UTC
    Size: 3231 Bytes
    <?php
    function Random_number($length){
        
    $result '';
        
    //Generate random number.    
        
    for($i=0;$i<$length;$i++){
            
    $result $result.random_int(0,9);
        }
        
        
    //Remove leading zeros.    
        
    $result ltrim($result,'0');
        if(
    $result == ''){
            
    $result 0;
        }
    return 
    $result;    
    }

    function 
    Random_string_to_int($string){
        
    $result '';
        
    //Count characters.
        
    $length strlen($string);
        
        
    //Ord ->Convert a character to its ASCII decimal value.
        
    for($i=0;$i<$length;$i++){
            
    $result $result.ord($string[$i]); 
        }
    return 
    $result;    
    }

    function 
    Random_int_to_string($number){
        
    //Convert integer to string.    
        
    $result number_format($number,0,'','');
    return 
    $result;    
    }

    function 
    Random_hash($data,$algo){
        
    //Hash string with an algo.    
        
    $result hash($algo,$data);
    return 
    $result;    
    }

    function 
    Random_basic_seed(){
        
    $result Random_number(128);
    return 
    $result;
    }

    function 
    Random_gmp_winner_number($basic_seed,$player_seed,$n_tickets,$n_players){
        
    $result '';
        
    //Convert integer to string.
        
    $n_tickets Random_int_to_string($n_tickets);
        
        
    //Hash all the parts
        
    $basic_seed Random_hash($basic_seed,'sha512');
        
    $player_seed Random_hash($player_seed,'sha512');
        
    $n_tickets_seed Random_hash($n_tickets,'sha512');
        
    $n_players_seed Random_hash($n_players,'sha512');        
        
        
    //Join all parts and hash
        
    $seed Random_hash($basic_seed.$player_seed.$n_tickets_seed.$n_players_seed,'sha512');
        
        
    //Convert letters to numbers.
        
    $seed Random_string_to_int($seed);
        
        
    //Insert seed into number generator. Only integers.
        
    gmp_random_seed($seed);
        
        
    //Generate random number.
        
    $value gmp_random_range(1,$n_tickets);
        
        
    //Convert GMP integer to string.    
        
    $result gmp_strval($value);
    return 
    $result;
    }
    /*
    //WINNER NUMBER
    $basic_seed = Random_basic_seed();
    $player_seed = 'f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16';//Transaction ID
    $n_players = 1;
    $n_tickets = 100000000;
    echo Random_gmp_winner_number($basic_seed,$player_seed,$n_tickets,$n_players);

    //RANDOMNESS TEST (Can be CPU intensive with more cycles / rounds)
    $cycles = 1;
    $runs = 1000;
    $tickets = 5;
    $player_seed = 'f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16';//Transaction ID
    $players = 5;

    $n_runs = 0;
    $probs = 0;
    $results = array();
    $results_prob = array();
    for($i=0;$i<$cycles;$i++){
        for($k=0;$k<$runs;$k++){
            $basic_seed = Random_basic_seed();
            $number = Random_gmp_winner_number($basic_seed,$player_seed,$tickets,$players);
            if(array_key_exists($number,$results)){
                $results[$number]++;
            }
            else{
                $results[$number] = 1;
            }
        }
    }
    ksort($results);?>

    <table>
        <thead>
            <td>Number</td>
            <td>Number of Times</td>
            <td>Probability</td>            
        </thead><?php 
    foreach($results as $key => $value){ 
        $n_runs += $value;
        $x = number_format((($value * 100)/($cycles * $runs)),3);
        $probs += $x;?>
        <tr>
            <td><?php echo $key;?></td>
            <td><?php echo $value;?></td>
            <td><?php echo $x.' %';?></td>
        </tr><?php 
    } ?>
        <tfoot>
            <td>Total Numbers: <?php echo count($results);?></td>
            <td>Total Runs: <?php echo $n_runs;?></td>
            <td>Total Prob: <?php echo $probs.' %';?></td>            
        <tfoot>
    </table><?php 
    */
    ?>
    RANDOMNESS TEST
    Oct 02, 2022 22:33:16 UTC
    Values Number of Runs Probability
    1 194 19.400 %
    2 216 21.600 %
    3 211 21.100 %
    4 182 18.200 %
    5 197 19.700 %
    5 1000 100 %