func: function sellOnApproveForOrigin(
          IMultiToken _mtkn,
          uint256 _amount,
          ERC20 _throughToken,
          address[] _exchanges,
          bytes _datas,
          uint[] _datasIndexes 
      )
          public
      {
          sellOnApprove(
              _mtkn,
              _amount,
              _throughToken,
              _exchanges,
              _datas,
              _datasIndexes,
              tx.origin
          );
      }