小编Roh*_*ami的帖子

我想将paytm支付网关与swift 3.0我集成.我只需按照github 链接.但我有问题["CHECKSUMHASH"]="".我能把这个钥匙放进去.

orderDict["MID"] = strMid
                            orderDict["ORDER_ID"] = strOrderId
                            orderDict["CUST_ID"] = strCustomerId
                            orderDict["INDUSTRY_TYPE_ID"] = strIndustryType
                            orderDict["CHANNEL_ID"] = strChanalID
                            orderDict["TXN_AMOUNT"] = strAmt
                            orderDict["WEBSITE"] = strWebsite
                            orderDict["CALLBACK_URL"] = "http://xxxxx.co.in/verifyChecksum.php"
                    orderDict["CHECKSUMHASH"] = ""

这给了我无效的校验和,请告诉我如何生成校验和.