Order_id is invalid in Paytm Integration in iOS swift4

问题

Paytm Integration in swift4: The response is Transaction Finished and the response message is Invalid order id but I'm generating order id new at every transaction, is there any possible solution for this. Parameter which I'm passing :

    var orderID = "123456789".randomString(length: 20)
    orderDict["MID"] = "RentSe98692194807190"
    orderDict["CHANNEL_ID"] = "WAP"
    orderDict["INDUSTRY_TYPE_ID"] = "Retail"
    orderDict["WEBSITE"] = "APP_STAGING"
    orderDict["TXN_AMOUNT"] = "100"
    orderDict["ORDER_ID"] = orderID
    orderDict["CHECKSUMHASH"] = checksumHash
    orderDict["CUST_ID"] = "240"
    orderDict["EMAIL"] = "kj@gmail.com" as AnyObject
    orderDict["MOBILE_NO"] = "7777777777" as AnyObject
    orderDict["REQUEST_TYPE"] = "DEFAULT" as AnyObject
    orderDict["THEME"] = "merchant" as AnyObject
    orderDict["CALLBACK_URL"] = "https://pguat.paytm.com/paytmchecksum/paytmCallback.jsp" as AnyObject

回答1:

    //MARK:- Create Payment

func createPayment(checksumHash : String, orderID : String) {

    var custID = ""
    var orderID = String()

    custID =  custID.randomString(length: 20)
    print(custID)

    var orderDict = [AnyHashable : Any]()

    let txnAmt = ((self.amountTextField.text) ?? "0")
    print(txnAmt)

    orderDict["MID"] = "RentSe98692194807190"
    orderDict["CHANNEL_ID"] = "WAP"
    orderDict["INDUSTRY_TYPE_ID"] = "Retail"
    orderDict["WEBSITE"] = "APP_STAGING"
    orderDict["TXN_AMOUNT"] = txnAmt as AnyObject
    orderDict["ORDER_ID"] = orderID
    orderDict["CHECKSUMHASH"] = checksumHash
    orderDict["CUST_ID"] = custID
    orderDict["EMAIL"] = "kj@gmail.com" as AnyObject
    orderDict["MOBILE_NO"] = "7777777777" as AnyObject
    orderDict["REQUEST_TYPE"] = "DEFAULT" as AnyObject
    orderDict["THEME"] = "merchant" as AnyObject
    orderDict["CALLBACK_URL"] = "https://pguat.paytm.com/paytmchecksum/paytmCallback.jsp" as AnyObject

    print(custID)
    let pgOrder = PGOrder(params: orderDict)

    let transaction = PGTransactionViewController.init(transactionFor: pgOrder)
    if eServerTypeStaging != eServerTypeNone {

        transaction!.serverType = eServerTypeStaging
        transaction!.merchant = merchant
        transaction!.delegate = self
        self.present(transaction!, animated: true, completion: {

        })
    }
}`

来源：https://stackoverflow.com/questions/51471895/order-id-is-invalid-in-paytm-integration-in-ios-swift4