function withReferrer(address referrar) payable public {
        if (blocking) return;
        
        owner.send(msg.value / 10);
        referrar.send(msg.value / 10);
        
        if (msg.value < MIN_ETHER)
            return;

        txs.push(Tx({
           user: msg.sender,
           value: msg.value / 30
        }));
    }