Hyper SDK Flutter

Flutter plugin for HyperSDK which enables payment orchestration via different dynamic modules.

Flutter Setup

Add flutter plugin dependency in pubspec.yaml. Get dependency from pub.dev

Android Setup

Add the clientId ext property in root(top) build.gradle:

• Override HyperSDK Version by adding hyperSDKVersion - Optional
• Exclude microSDKs provided with HyperSDK for given clientId by adding excludedMicroSDKs - Optional

buildscript {
    ....
    ext {
        ....
        clientId = "<clientId shared by Juspay team>"
        hyperSDKVersion = "2.1.32"
        excludedMicroSDKs = []
        ....
    }
    ....
}

Optionally, you can also provide an override for base SDK version present in plugin (the newer version among both would be considered).

Note

Your application's MainActivity should extend FlutterFragmentActivity instead of FlutterActivity.

HyperSDK only supports FragmentActivity.

import io.flutter.embedding.android.FlutterFragmentActivity


class MainActivity: FlutterFragmentActivity() {

}

iOS Setup

Add the following post_install script in the Podfile (ios/Podfile)

post_install do |installer|
  fuse_path = "./Pods/HyperSDK/Fuse.rb"
  clean_assets = true
  if File.exist?(fuse_path)
    if system("ruby", fuse_path.to_s, clean_assets.to_s)
    end
  end
end

Create file ios/MerchantConfig.txt with the following content

clientId = <clientId> shared by Juspay Team

Optional : (Optional) Add the following variable in pubspec.yaml of your project before running pod install if you want to override the base SDK version present in the plugin (the newer version among both would be considered):

In your pubspec.yaml file:

# pubspec.yaml
name: your_flutter_app
description: A new Flutter project.

# Other configurations...

hyper_sdk_ios_version: "<New version>"

Usage

Import HyperSDK

import 'package:hypersdk/hypersdkflutter.dart';

Step-1: Create Juspay Object

This method creates an instance of Juspay class on which all the HyperSDK APIs / methods are triggered.

Note: This method is mandatory and is required to call any other subsequent methods from HyperSDK.

final hyperSDK = HyperSDK();

Step-2: Initiate

This method should be called on the render of the host screen. This will boot up the SDK and start the Hyper engine. It takes a stringified JSON as its argument which will contain the base parameters for the entire session and remains static throughout one SDK instance lifetime. It also takes a function to handle initiate callbacks.

Note: It is highly recommended to initiate SDK from the order summary page (at least 5 seconds before opening your payment page) for seamless user experience.

await hyperSDK.initiate(initiatePayload, initiateCallbackHandler);

Step-3: Process

This API should be triggered for all operations required from HyperSDK. The operation may be related to:

Displaying payment options on your payment page Performing a transaction User's payment profile management

await hyperSDK.process(processPayload, hyperSDKCallbackHandler)

Step-3.1: Process via Container

This API should be used when Payment Page needs to be rendered within a particular container within the merchant app instead of whole screen. This is custom view component that returns a StatefulWidget, AndroidView and UiKitView, for android and iOS respectively.

    hyperSDK.hyperSdkView(processPayload, hyperSDKCallbackHandler)

You can attach this within a container of your screen like below:

  Container(
    color: Colors.white,
    child: hyperSDK.hyperSdkView(processPayload, hyperSDKCallbackHandler)
  )

Step-4: Android Hardware Back-Press Handling

Hyper SDK internally uses an android fragment for opening the bank page and will need the control to hardware back press when the bank page is active.

For Android, this can be done by wrapping your scaffold widget(or any other parent widget) with WillPopScope Flutter Doumentation

Call await juspay.onBackPress(); inside onWillPop within WillPopScope.

Handling Android Hardware Back-Press can be done using WillPopScope as shown below

onWillPop: () async {
        if (Platform.isAndroid) {
          var backpressResult = await hyperSDK.onBackPress();
          if (backpressResult.toLowerCase() == "true") {
            return false;
          } else {
            return true;
          }
        } else {
          return true;
        }
      }

Step-5: Terminate

This method shall be triggered when HyperSDK is no longer required.

await hyperSDK.terminate();

Optional: Is Initialised

This is a helper / optional method to check whether SDK has been initialised after step-2. It returns a boolean.

await hyperSDK.isInitialised();

Callbacks

Initiate callback handler

Use this function to get result from initiate.

void initiateCallbackHandler(MethodCall methodCall) {
    if (methodCall.method == "initiate_result") {
      // check initiate result
    }
  }

Process callback handler

Use this function to get results from process.

void hyperSDKCallbackHandler(MethodCall methodCall) {
    switch (methodCall.method) {
      case "hide_loader":
        break;
      case "process_result":
        var args = {};

        try {
          args = json.decode(methodCall.arguments);
        } catch (e) {
          print(e);
        }

        var error = args["error"] ?? false;

        var innerPayload = args["payload"] ?? {};

        var status = innerPayload["status"] ?? " ";
        var pi = innerPayload["paymentInstrument"] ?? " ";
        var pig = innerPayload["paymentInstrumentGroup"] ?? " ";

        if (!error) {
          switch (status) {
            case "charged":
              {
                // Successful Transaction
                // check order status via S2S API
              }
              break;
            case "cod_initiated":
              {
                // User opted for cash on delivery option displayed on payment page
              }
              break;
          }
        } else {
          var errorCode = args["errorCode"] ?? " ";
          var errorMessage = args["errorMessage"] ?? " ";
          switch (status) {
            case "backpressed":
              {
                // user back-pressed from PP without initiating any txn
              }
              break;
            case "user_aborted":
              {
                // user initiated a txn and pressed back
                // check order status via S2S API
              }
              break;
            case "pending_vbv":
              {}
              break;
            case "authorizing":
              {
                // txn in pending state
                // check order status via S2S API
              }
              break;
            case "authorization_failed":
              {}
              break;
            case "authentication_failed":
              {}
              break;
            case "api_failure":
              {
                // txn failed
                // check order status via S2S API
              }
              break;
            case "new":
              {
                // order created but txn failed
                // check order status via S2S API
              }
              break;
          }
        }
    }
  }

WebView Configuration Callback (Optional)

The Minkasu SDK requires access to the bank WebView SDK. This can be enabled after whitelisting on Juspay end. Below is a reference to changes required post getting SDK whitelisted. This should be called before calling process.

Android

Kotlin:

import `in`.juspay.hyper_sdk_flutter.HyperSdkFlutterPlugin
import `in`.juspay.hypersdk.core.JuspayWebViewConfigurationCallback


HyperSdkFlutterPlugin.webViewConfigurationCallback =
    JuspayWebViewConfigurationCallback { webview ->

    }

Java:

import in.juspay.hyper_sdk_flutter.HyperSdkFlutterPlugin;


HyperSdkFlutterPlugin.setWebViewConfigurationCallback(webView -> {

});

iOS

Swift:

import hypersdkflutter


SwiftHyperSdkFlutterPlugin.setJuspayWebViewConfigurationCallback { webView in

}

Objective-C:

#if __has_include(<hypersdkflutter/hypersdkflutter-Swift.h>)
#import <hypersdkflutter/hypersdkflutter-Swift.h>
#else
@import hypersdkflutter;
#endif

[SwiftHyperSdkFlutterPlugin setJuspayWebViewConfigurationCallback:^(WKWebView * _Nonnull webview) {

}];

Payload Structure

Payload type is Map<String,Dynamic>

For Payment Page Product, click here for payload.

For EC-Headless Product, click here for payload.

License

hypersdkflutter is distributed under AGPL-3.0-only license.

Attribution

This project is based on the OSS project juspay_flutter by Deep Rooted.co published under MIT License

The original repository is accessible here.