//

    function claimPrizesForRound(uint256 roundToClaim) external {
        //@audit note: as long as MAX_ROUNT_TIME(30 days) hasn't passed, user can claim prizes as soon as the owner set `winningTickets` for the round. No delay in claiming is enforced.
        require(
            roundStart[roundToClaim] + MAX_ROUND_TIME >= block.timestamp,
            "ICT"
        );
        require(winningTickets[roundToClaim][0].length > 0, "NWT");
...
