code: def unpack_rsp(cls, rsp_pb):
          
          if rsp_pb.retType != RET_OK:
              return RET_ERROR, rsp_pb.retMsg, None
  
          raw_deal_list = rsp_pb.s2c.orderFillList
          deal_list = [DealListQuery.parse_deal(rsp_pb, deal) for deal in raw_deal_list]
  
          return RET_OK, "", deal_list
docs: Convert from PLS response to user response