A hash is generated for each round of play, by combining the client and server seeds with the game and round numbers. The first 48 digits of the hash are taken and separated into 6 parts of 8 digits each. Each part represents a card on the table, from a minimum of 4 cards to a maximum of 6.

Example:
ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad
Card 1: ba7816bf
Card 2: 8f01cfea
Card 3: 414140de
Card 4: 5dae2223
Card 5: b00361a3
Card 6: 96177a9c

The digits of each part are then randomized, and this formula: floor(result* 52) is then used to arrive at a result from 0 - 51.
// Index of 0 to 51: ♥A to ♠K
const CARDS = [
0 - 12: ♥A, ♥2, ♥3 ♥4, ♥5, ♥6, ♥7 ♥8, ♥9, ♥10, ♥J ♥Q, ♥K,
13 - 25: ♦A, ♦2, ♦3, ♦4, ♦5, ♦6, ♦7, ♦8, ♦9, ♦10, ♦J, ♦Q, ♦K,
26 - 39: ♣A, ♣2, ♣3, ♣4, ♣5, ♣6, ♣7, ♣8, ♣9, ♣10, ♣J, ♣Q, ♣K,
39 - 51: ♠A, ♠2, ♠3, ♠4, ♠5, ♠6, ♠7, ♠8, ♠9, ♠10, ♠J, ♠Q, ♠K
];
// Game event translation
const card = CARDS[Math.floor(float * 52)];

Card Order:
Player's first two cards are Cards 1 and 2.
Banker's first two cards are Cards 3 and 4.
If only the Player or Banker draws a third card, it will be Card 5.
If both Player and Banker draw a third card, they will be Cards 5 and 6 respectively.
Card 6 is always the Banker's third card (if drawn).

const gameHash = hashChain.pop()

const hmac = createHmac('sha256', gameHash);

// blockHash is the hash of bitcoin block insert chosen block here, and also the resulting hash.

hmac.update(blockHash);

const hex = hmac.digest('hex').substr(0, 8);
const int = parseInt(hex, 16);

// 0.01 will result in 1% house edge with a lowest crashpoint of 1

const crashpoint = Math.max(1, (2 ** 32 / (int + 1)) * (1 - 0.01))