All-in-One SDK Integration in Unity App

Android Gradle dependency

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.Runtime.InteropServices;
using AOT;

public class DemoAppInvokePlugin
{
#if UNITY_IOS
    [DllImport("__Internal")]
private static extern void _startPaymentForPaytm(string orderId, string merchantId, string amount, string transactionToken, string callbackUrl, bool isStaging, bool isAppInvokeRestricted); 
public static void startPaymentForPaytm(string orderId, string merchantId, string amount, string transactionToken, string callbackUrl, bool isStaging, bool isAppInvokeRestricted) { 
_setDelegate(delegateMessageReceived);
_startPaymentForPaytm(orderId, merchantId, amount, transactionToken, callbackUrl, isStaging, isAppInvokeRestricted);
}
    [DllImport("__Internal")]
    private static extern void _setDelegate(DelegateMessage callback);
    private delegate void DelegateMessage(string response);
    [MonoPInvokeCallback(typeof(DelegateMessage))] 
    private static void delegateMessageReceived(string response) {
      Debug.Log("Message received in AppInvokePlugin : " + response);
      DemoTransactionBtn.setResponse("response: " + response);
    }
    

#elif UNITY_ANDROID

    public static void startTransactionCall(string orderId, string mid, string amount, string txnToken, string callbackUrl, bool isStaging, bool isAppInvokeRestricted)
    {

        const string pluginName = "com.paytm.unityaioplugin.AIOSdkPluginHelper";

        AndroidJavaClass pluginClass = new AndroidJavaClass(pluginName);
        AndroidJavaObject pluginInstance = null;

        AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
        AndroidJavaObject mCurrentActivity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
        Debug.Log("Current activity " + mCurrentActivity);

        if (mCurrentActivity != null && pluginClass != null)
        {
            Debug.Log("Android pluginClass created");
            pluginClass.SetStatic<AndroidJavaObject>("mainActivity", mCurrentActivity);
        }

        if (pluginClass != null)
        {
            pluginInstance = pluginClass.CallStatic<AndroidJavaObject>("getInstance");
            Debug.Log("Android pluginInstance created");

        }

        pluginInstance.Call("startTransactionApi", new object[] { mid, orderId, amount, txnToken, callbackUrl, isStaging, isAppInvokeRestricted, new TransactionCallback() });

    }

#endif
}

using System;
using UnityEngine;

public class DemoTransactionCallback : AndroidJavaProxy
{

    private const string pluginName = "com.paytm.unityaioplugin.AIOSdkPluginHelper";

    public DemoTransactionCallback() : base(pluginName + "$onTransactionCallback")
    {
      
    }
    public void onTransactionSuccess(string msg, string data)
    {
        Debug.Log("TransactionCallback: onTransactionSuccess:" + msg);
        Debug.Log("TransactionCallback: Data:" + data);
        DemoTransactionBtn.setResponse("Message: " + msg +"\nResponse:"+data);

    }

    public void onTransactionError(string msg)
    {
        Debug.Log("TransactionCallback: onTransactionError" + msg);
        DemoTransactionBtn.setResponse("Message: " + msg);

    }
}

#if UNITY_IOS
     DemoAppInvokePlugin.startPaymentForPaytm(getOrderId(), getMerchantId(), getAmount(), getTransactionToken(), getCallBackURL(), !isProductionEnvironment(), isAppInvokeRestricted());

#elif UNITY_ANDROID
    DemoAppInvokePlugin.startTransactionCall(getOrderId(), getMerchantId(), getAmount(), getTransactionToken(), getCallBackURL(), !isProductionEnvironment(), isAppInvokeRestricted());

#endif

1. Add an entry into Info.plist LSApplicationQueriesSchemes(Array) Item 0 (String)-> paytm. To add the entry, create a class and implement the method ChangeXcodePlist(BuildTarget buildTarget, string pathToBuiltProject)

   using UnityEngine;
   using UnityEditor;
   using UnityEditor.Callbacks;
   using System.Collections;
   #if UNITY_IOS
     using UnityEditor.iOS.Xcode;
   #endif
   using System.IO;
   
   public class ChangeIOSBuildNumber {
     #if UNITY_IOS
     [PostProcessBuild]
     public static void ChangeXcodePlist(BuildTarget buildTarget, string pathToBuiltProject) {
         if (buildTarget == BuildTarget.iOS) {
             // Get plist
             string plistPath = pathToBuiltProject + "/Info.plist";
             PlistDocument plist = new PlistDocument();
             plist.ReadFromString(File.ReadAllText(plistPath));
   
             // Get root
             PlistElementDict rootDict = plist.root;
             //Adding the LSApplicationQueriesScheme to open Paytm application
             var queryScheme = rootDict.CreateArray("LSApplicationQueriesSchemes");
             queryScheme.AddString("paytm");            
   
             // Write to file
             File.WriteAllText(plistPath, plist.WriteToString());
         }
     }
     #endif
   }

   The above class needs to be added in the Editor folder of the scripts. Refer to the Demo included in the package.
2. Add a URL Scheme “paytm”+”MID”. To add the scheme, open Player settings (File => Build Settings => Player Settings => Player => Other Settings => Supported URL Schemes) Add the URL scheme as per the format to enable the unity application to receive the callback from Paytm.

   

3. If you face an error while archiving the build for App Store, add the script available in Plugins folder “stripArchitecture.sh” in your application’s build phases.