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refactor mines multiplier logic to shared utility

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This commit is contained in:
Face 2025-06-24 18:08:30 +03:00
parent 05b44be32e
commit fda3643881
3 changed files with 41 additions and 61 deletions
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52
website/src/lib/server/games/mines.ts
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@ -2,6 +2,7 @@ import { db } from '$lib/server/db';
import { user } from '$lib/server/db/schema';
import { eq } from 'drizzle-orm';
import { redis } from '$lib/server/redis';
import { calculateMinesMultiplier } from '$lib/utils';
interface MinesSession {
sessionToken: string;
@ -111,53 +112,6 @@ export async function minesAutoCashout() {
}
}
const getMaxPayout = (bet: number, picks: number, mines: number): number => {
const MAX_PAYOUT = 2_000_000;
const HIGH_BET_THRESHOLD = 50_000;
const mineFactor = 1 + (mines / 25);
const baseMultiplier = (1.4 + Math.pow(picks, 0.45)) * mineFactor;
if (bet > HIGH_BET_THRESHOLD) {
const betRatio = Math.pow(Math.min(1, (bet - HIGH_BET_THRESHOLD) / (MAX_PAYOUT - HIGH_BET_THRESHOLD)), 1);
// Direct cap on multiplier for high bets
const maxAllowedMultiplier = 1.05 + (picks * 0.1);
const highBetMultiplier = Math.min(baseMultiplier, maxAllowedMultiplier) * (1 - (bet / MAX_PAYOUT) * 0.9);
const betSizeFactor = Math.max(0.1, 1 - (bet / MAX_PAYOUT) * 0.9);
const minMultiplier = (1.1 + (picks * 0.15 * betSizeFactor)) * mineFactor;
const reducedMultiplier = highBetMultiplier - ((highBetMultiplier - minMultiplier) * betRatio);
const payout = Math.min(bet * reducedMultiplier, MAX_PAYOUT);
return payout;
}
const payout = Math.min(bet * baseMultiplier, MAX_PAYOUT);
return payout;
};
export function calculateMultiplier(picks: number, mines: number, betAmount: number): number {
const TOTAL_TILES = 25;
const HOUSE_EDGE = 0.05;
// Calculate probability of winning based on picks and mines
let probability = 1;
for (let i = 0; i < picks; i++) {
probability *= (TOTAL_TILES - mines - i) / (TOTAL_TILES - i);
}
if (probability <= 0) return 1.0;
// Calculate fair multiplier based on probability and house edge
const fairMultiplier = (1 / probability) * (1 - HOUSE_EDGE);
const rawPayout = fairMultiplier * betAmount;
const maxPayout = getMaxPayout(betAmount, picks, mines);
const cappedPayout = Math.min(rawPayout, maxPayout);
const effectiveMultiplier = cappedPayout / betAmount;
return Math.max(1.0, Number(effectiveMultiplier.toFixed(2)));
}
return calculateMinesMultiplier(picks, mines, betAmount);
}