Topic: Jonbet Crash Game Seeding Event (Read 167 times)

const ROULETTE_TILES = [
  { number: 0, color: 'white' },
  { number: 11, color: 'black' },
  { number: 5, color: 'red' },
  { number: 10, color: 'black' },
  { number: 6, color: 'red' },
  { number: 9, color: 'black' },
  { number: 7, color: 'red' },
  { number: 8, color: 'black' },
  { number: 1, color: 'red' },
  { number: 14, color: 'black' },
  { number: 2, color: 'red' },
  { number: 13, color: 'black' },
  { number: 3, color: 'red' },
  { number: 12, color: 'black' },
  { number: 4, color: 'red' },
];

module.exports.getColorByRoll = (roll) => {
  return ROULETTE_TILES.find((t) => t.number === roll).color;
};

const getWhiteMultiplierFromHash = (hash) => {
  let h = parseInt(hash.slice(0, -52 / 4), 16);
  let e = Math.pow(2, 52);

  let multiplier = Math.floor((100 * e - h) / (e - h)) / 100 + 7.5;
  multiplier = Math.max(8.5, Math.min(multiplier, 250));

  return +multiplier.toFixed(2);
};

module.exports.getRollFromHash = (hash) => {
  const integ = parseInt(hash, 16);
  const MAX_RANGE = Math.pow(2, 256);
  const randval = integ / MAX_RANGE;
  const n = Math.floor(randval * 15);
  const tile = ROULETTE_TILES.find((t) => t.number === n);

  let color, multiplier;
  switch (tile.color) {
    case 'white':
      color = 0;
      multiplier = getWhiteMultiplierFromHash(hash);
      break;

    case 'black':
      color = 2;
      multiplier = 2;
      break;

    case 'red':
      color = 1;
      multiplier = 2;
      break;
  }

  return {
    n: n,
    multiplier: multiplier,
    color: color,
  };
};

const { createHmac } = require('crypto');

const divisible = (hash, mod) => {
  // So ABCDEFGHIJ should be chunked like  AB CDEF GHIJ
  let val = 0;

  let o = hash.length % 4;
  for (let i = o > 0 ? o - 4 : 0; i < hash.length; i += 4) {
    val = ((val << 16) + parseInt(hash.substring(i, i + 4), 16)) % mod;
  }

  return val === 0;
};

const calculateIfIsBonusRound = (provablyFairHash) => {
  return divisible(provablyFairHash, 72);
};

const calculateCrashPointFromHash = function (hash) {
  // In 1 of 15 games the game crashes instantly.
  if (divisible(hash, 15)) return 0;

  // Use the most significant 52-bit from the hash to calculate the crash point
  let h = parseInt(hash.slice(0, 52 / 4), 16);
  let e = Math.pow(2, 52);

  return (Math.floor((100 * e - h) / (e - h)) / 100).toFixed(2);
};

// these will be the 10M pre generated rolls to be used
const hashChain = ['random1', 'random2'];

const gameHash = hashChain.pop();

const blockHash = '';

const hash = createHmac('sha256', gameHash).update(blockHash).digest('hex');

const crashPoint = calculateCrashPointFromHash(hash);
// if it's bonus round you get double payout
const isBonusRound = calculateIfIsBonusRound(hash);

console.log({ crashPoint, isBonusRound });

const { createHmac } = require('crypto');

const divisible = (hash, mod) => {
  // So ABCDEFGHIJ should be chunked like  AB CDEF GHIJ
  let val = 0;

  let o = hash.length % 4;
  for (let i = o > 0 ? o - 4 : 0; i < hash.length; i += 4) {
    val = ((val << 16) + parseInt(hash.substring(i, i + 4), 16)) % mod;
  }

  return val === 0;
};
const calculateSlidePointFromHash = function (hash) {
  // In 1 of 15 games the game slides instantly.
  if (divisible(hash, 15)) return 0;

  // Use the most significant 52-bit from the hash to calculate the slide point
  let h = parseInt(hash.slice(0, 52 / 4), 16);
  let e = Math.pow(2, 52);

  return (Math.floor((100 * e - h) / (e - h)) / 100).toFixed(2);
};

// these will be the 10M pre generated rolls to be used
const hashChain = [];

const gameHash = hashChain.pop();

// It's the hash we're gonna be using of the result of a yet to be mined block on the blockchain #814,558
const blockHash = '';

const hash = createHmac('sha256', gameHash).update(blockHash).digest('hex');

const slidePoint = calculateSlidePointFromHash(hash);
console.log({ slidePoint });

const { createHmac } = require('crypto');

const divisible = (hash, mod) => {
  // So ABCDEFGHIJ should be chunked like  AB CDEF GHIJ
  let val = 0;

  let o = hash.length % 4;
  for (let i = o > 0 ? o - 4 : 0; i < hash.length; i += 4) {
    val = ((val << 16) + parseInt(hash.substring(i, i+4), 16)) % mod;
  }

  return val === 0;
};

const calculateCrashPointFromHash = function(hash) {
  // In 1 of 15 games the game crashes instantly.
  if (divisible(hash, 15))
    return 0;

  // Use the most significant 52-bit from the hash to calculate the crash point
  let h = parseInt(hash.slice(0,52/4),16);
  let e = Math.pow(2,52);

  return (Math.floor((100 * e - h) / (e - h)) / 100).toFixed(2);
}

// these will be the 10M pre generated rolls to be used
const hashChain = [];

const gameHash = hashChain.pop();

// It's the hash we're gonna be using of the result of a yet to be mined block on the blockchain #813,847
const blockHash = '';

const hash = createHmac('sha256', gameHash).update(blockHash).digest('hex');

const crashPoint = calculateCrashPointFromHash(hash);
console.log({ crashPoint });