    function getBadCollateralRatio(address pool) external view returns(uint256) {
        if(vaultBadCollateralRatio[pool] == 0) return vaultSafeCollateralRatio[pool] - 1e19;
        return vaultBadCollateralRatio[pool];
    }
    function getSafeCollateralRatio(
        address pool
    ) external view returns (uint256) {
        if (vaultSafeCollateralRatio[pool] == 0) return 160 * 1e18;
        return vaultSafeCollateralRatio[pool];
    }
    function setBadCollateralRatio(address pool, uint256 newRatio) external onlyRole(DAO) {
        require(newRatio >= 130 * 1e18 && newRatio <= 150 * 1e18 && newRatio <= vaultSafeCollateralRatio[pool] + 1e19, "LNA");
        ...
    }
