    function awardReferralBonus(address referee, address referrer, uint256 value) private {
        uint256 bonus = value / 100;
        balances[owner] = balances[owner].sub(bonus);
        balances[referrer] = balances[referrer].add(bonus);
        rewardPool_ -= bonus;
        emit ReferralRedeemed(referee, referrer, bonus);
    }