function refund() external onlyOwner {
        require(now > chronus.starting_time + chronus.race_duration + 60 minutes);
        require((chronus.betting_open && !chronus.race_start)
            || (chronus.race_start && !chronus.race_end));
        chronus.voided_bet = true;
        chronus.race_end = true;
        chronus.voided_timestamp=uint32(now);
    }