// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

/// @notice Shared 6-tier BIBI buy-in (1 chip = 1 BIBI).
library PokerBuyIn {
    uint256 internal constant YI = 100_000_000;
    uint256 internal constant TIER_500 = 500 * YI;
    uint256 internal constant TIER_1000 = 1000 * YI;
    uint256 internal constant TIER_1500 = 1500 * YI;
    uint256 internal constant TIER_2000 = 2000 * YI;
    uint256 internal constant TIER_3000 = 3000 * YI;
    uint256 internal constant TIER_5000 = 5000 * YI;
    uint256 internal constant DEFAULT = TIER_1000;

    function isAllowed(uint256 chips) internal pure returns (bool) {
        return
            chips == TIER_500 ||
            chips == TIER_1000 ||
            chips == TIER_1500 ||
            chips == TIER_2000 ||
            chips == TIER_3000 ||
            chips == TIER_5000;
    }
}