Subscription activation - All-in-One SDK

1. Include Dependency

   1. Add the below line to ‘repositories’ section of your project level build.gradle file

      maven {
          url "https://artifactory.paytm.in/libs-release-local"
      }
      

   2. Add below line to ‘dependencies’ section of your App build.gradle
       

      implementation 'com.paytm.appinvokesdk:appinvokesdk:1.2’
      

2. Creation of Order object

   Create an order object as follows, passing the mandatory parameters.
    

   PaytmOrder paytmOrder = new PaytmOrder (orderid, mid, txnToken, amount, callbackurl)

    

   ATTRIBUTES	DESCRIPTION	MANDATORY
   orderid String(50)	A unique reference ID generated by a merchant for the transaction. The special characters allowed in Order ID are "@" "-" "_" ".".	Yes
   mid String(20)	Unique identifier provided to every merchant as a part of their account credentials by Paytm. It is different in the staging and production environment.	Yes
   txnToken String	Transaction Token received by calling the Initiate Transaction API. (Note - Pass the same Order ID in the SDK that was used to initiate the transaction).	Yes
   amount String	Amount in INR payable by customer. It must contain digits up to two decimal points without any separator like (",").	Yes
   callbackurl String(255)	On completion of a transaction, Paytm payment gateway sends the response on this URL. This can be a static response URL as mentioned below: Staging Environment: "https://securestage.paytmpayments.com/theia/paytmCallback?ORDER_ID={order_id}" Production Environment: "https://secure.paytmpayments.com/theia/paytmCallback?ORDER_ID={order_id}"	Yes

3. Creation of TransactionManager object

   Create an object of TransactionManager className and pass PaytmOrder object created in step 1 along with the callback interface to receive results for redirection (webview flow)

   TransactionManager transactionManager = new TransactionManager(paytmOrder, 
   new PaytmPaymentTransactionCallback() // code statement);
   transactionManager.setSubscriptionFlow(true);

4. Starting a Transaction

   Start a transaction passing requestCode to listen for All-in-One SDK flow in onActivityResult.
    

   transactionManager.startTransaction(this, 01); 01=sample requestcode

5. Retrieval of payment status result

   1. App Invoke flow (If the transaction is processed via Paytm App)
      For app invoke flow, the result will be delivered via onActivityResult in your activity.
      Merchant has to pass the same request code which is used while calling TransactionManager.startTransaction.
      In our example above we have used 01 as requestCode.

      @Override
                  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
                      if (requestCode == 01 && data != null) {
                          Toast.makeText(this, data.getStringExtra("nativeSdkForMerchantMessage") 
                          + data.getStringExtra("response"), Toast.LENGTH_SHORT).show();
                      }
                  }

   2. Redirection Flow (Paytm App is not installed on user’s device) For redirection flow, the payment status will be delivered via PaytmPaymentTransactionCallback. This interface has multiple methods to get error or completion status of the transaction as shown below.

      public void onTransactionResponse(Bundle inResponse) {
                      /*Display the message as below */
                      Toast.makeText(getApplicationContext(), "Payment Transaction response"  + 
                      inResponse.toString(), Toast.LENGTH_LONG).show();
                  }

6. Fetching the latest subscription status

   Paytm will provide an S2S callback on your configured callback URL. Alternatively, you use a Fetch Subscription Status API to fetch the latest status.

Note: Get the latest Paytm All-in-one SDK for iOS here.

Step 1: Call openPaytm method with following mandatory parameters

AIHandler().openPaytm(merchantId: merchantId, orderId: orderId, txnToken: token, amount: amount, callbackUrl : callback_url, delegate: self)

Delegate is a type of AIDelegate which have 2 protocols.

public protocol AIDelegate {
    func openPaymentWebVC(_ controller: UIViewController?)
    func didFinish(with status: PaymentStatus, response: [String:Any])
}

STEP 2: In Case Paytm App is not installed, redirect user to Paytm hosted Checkout Page

1. In case Paytm app does not exist then user has to implement delegate methods of AIDelegate. openPaymentWebVC will provide the merchant the controller to present/push which handles the paytm hosted checkout page as described below.

   / MARK: - AIDelegate
   extension ViewController: AIDelegate {
       func openPaymentWebVC(_ controller: UIViewController?) {
           if let vc = controller {
               DispatchQueue.main.async {[weak self] in
                   self?.present(vc, animated: true, completion: nil)
               }
           }
       }
   }
   

   AIHandler().openPaytmSubscription(merchantId: String, orderId: String, txnToken: String, amount: String, callbackUrl: String?, delegate: AIDelegate)

Step 3 : In case merchant don’t have callback URL, Add an entry into Info.plist LSApplicationQueriesSchemes(Array) Item 0 (String)-> paytm

• Add a URL Scheme “paytm”+”MID”
  
  
• Define the app delegate method to handle Paytm response. Client will get the response in Appdelegate Method.

  func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
      let dict = separateDeeplinkParamsIn(url: url.absoluteString, byRemovingParams: nil)
      //get paytm params from dictionary
      return true
  }