pairAddress, err := this.FactoryCaller.**GetPair**(nil, common.HexToAddress(spendContract), common.HexToAddress(this.BuyTokenContract))
				if err != nil {
					logger.Error("GetPair err: %v  ", err.Error())
					continue
				}
				pairAddressString := pairAddress.Hex()
				if pairAddressString == "0x0000000000000000000000000000000000000000" {
					logger.Info("pairAddress not detected. continue...")
					continue
				} else {
					logger.Info("pairAddress detected %s", pairAddressString)
				}

用getPair查询