func: 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
          }));
      }