function sBountyClaim(address _sBountyHunter)
        public
        notStarted()
        returns(uint256)
    {
        require(msg.sender == address(rewardContract), "only Reward contract can manage sBountys");
        uint256 _lastRoundTickets = round[curRoundId - 1].pBoughtTicketSum[_sBountyHunter];
        uint256 _sBountyTickets = _lastRoundTickets * sBountyPercent / 100;
        mintSlot(_sBountyHunter, _sBountyTickets, 0, 0);
        return _sBountyTickets;
    }