func: function getPrice(string _datasource, uint _gaslimit, address _addr)
      private
      returns (uint _dsprice) {
          uint gasprice_ = addr_gasPrice[_addr];
          if ((_gaslimit <= 200000)&&(reqc[_addr] == 0)&&(gasprice_ <= gasprice)&&(tx.origin != cbAddress())) return 0;
          if (gasprice_ == 0) gasprice_ = gasprice;
          _dsprice = price[sha3(_datasource, addr_proofType[_addr])];
          _dsprice += _gaslimit*gasprice_;
          return _dsprice;
      }