---
page_source: https://docs.juspay.io/hypercheckout/ios/base-sdk-integration/open-hypercheckout-screen
page_title: 3. Open Hypercheckout Screen
---


# 3. Open Hypercheckout Screen



Once the the Hypercheckout screen is opened, your users can proceed with the transactions. Opening the Hypercheckout screen requires a Server-to-Server request from Merchant to Juspay. The response of this should be forwarded to the Hypercheckout SDK in order to open the payment screen.

> **Warning**
> This step should be done only once the final payable amount is available




### Step 3.1. Fetch Process Payload


The process function takes a JSONObject as argument. This argument is also known as process payload.

In order to fetch process payload following steps should be followed: Make a request from Client to your Server with necessary order parameters Your server should call [Juspay's Session API](/hyper-checkout/ios/base-sdk-integration/session)(Server-to-Server call) Session API will respond with a JSON object which contains process payload inside `sdk_payload` key Send the `sdk_payload` from your server to client



#### Code Snippets: -

#### Swift Code Snippet:

```swift
func getProcessPayload(completion: @escaping ([AnyHashable: Any]?) -> Void) {
        // Make an API Call to your server to create Session and return SDK Payload
        // API Call should be made on the merchants server
        createOrder { jsonData in
            completion(jsonData)
        }
    }
```

#### ObjectiveC Code Snippet:

```objectivec
- (NSDictionary *)createProcessPayload {
    // Make an API Call to your server to create Session and return SDK Payload
    //Payload received from Session API call
    NSDictionary *sdkProcessPayload = @{
        @"clientId": @"<your_client_id>",
        @"amount": @"1.0",
        @"merchantId": @"<your_merchant_id>",
        @"clientAuthToken": @"tkn_xxxxxxxxxxxxxxxxxxxxx",
        @"clientAuthTokenExpiry": @"2022-03-12T20:29:23Z",
        @"environment": @"sandbox",
        @"lastName": @"wick",
        @"action": @"paymentPage",
        @"customerId": @"testing-customer-one",
        @"returnUrl": @"https://shop.merchant.com",
        @"currency": @"INR",
        @"firstName": @"John",
        @"customerPhone": @"9876543210",
        @"customerEmail": @"test@mail.com",
        @"orderId": @"testing-order-one",
        @"description": @"Complete your payment"
    };
    
    NSDictionary *sdkPayload = @{
        @"requestId": NSUUID.UUID.UUIDString,
        @"service": @"in.juspay.hyperpay",
        @"payload": sdkProcessPayload
    };

    return sdkPayload;
}
```



### Step 3.2. Call Process Function


Pass the JSON inside `sdk_payload` obtained in `Step 3.1`, to `process`SDK function.

Process is to be called on the same instance of HyperService using which initiate was called.



#### Code Snippets: -

#### Swift Code Snippet:

```swift
hyperInstance.process(sdkProcessPayload)
```

#### ObjectiveC Code Snippet:

```objectivec
NSDictionary *processPayload = [self createProcessPayload];
    [self.hyperInstance process:processPayload];
```


> **Warning**
> As soon as you sign up with Juspay, we set you up with a Dummy PG automatically. Using this Dummy PG, you can run test transactions with a pre-configured set of cards. You may also configure the test credentials of the gateway and use the respective test cards for completing the transaction journey. Please refer to the [Test Resources](/hyper-checkout/ios/resources/test-resources)page for more details.