Integration Steps

Create a WebView on Mobile App

Code Sample

var options = {
  ... // existing options
  callback_url: 'https://your-server/callback_url',
  redirect: true
}

The script that callback_url points to should to handle incoming POST requests.

For a successful payment, the callback URL will have razorpay_payment_id. In addition, razorpay_order_id and razorpay_signature will be returned in the request body, provided your server-side has been integrated with Orders API. Know more about

Orders API

Handy Tips

You can set query parameters with callback_url to map it with entities at your end. For example, following is a valid callback URL: https://your-site.com/callback?cart_id=12345

Failed Payment

Hand Over Payment Result to Native App

If you are loading the checkout form to WebView on your native mobile app without using the Razorpay SDK, provide a callback_url in the Curlec Checkout parameters. After a successful payment, a redirect is made to the specified URL. You can enable the handover control from the page loaded at callback_url to your native app code.

Payment Callbacks to Android Native Code

The webpage will be loaded into a WebView class. To communicate anything from the webpage loaded into WebView to native code, you would need to add a JavaScriptInterface to the WebView.

Add JavascriptInterface to WebView

webView.addJavascriptInterface("PaymentInterface", new PaymentInterface());

class PaymentInterface{
  @JavascriptInterface
  public void success(String data){
  }

  @JavascriptInterface
  public void error(String data){
  }
}

The JavaScript code loaded into WebView calls the native methods of PaymentInterface class, PaymentInterface.success() and PaymentInterface.error().

Code to Enable Cookies

Add the following code to your WebView to enable cookies.

if (android.os.Build.VERSION.SDK_INT >= 21) {   
     CookieManager.getInstance().setAcceptThirdPartyCookies(mWebView, true);
} else {
     CookieManager.getInstance().setAcceptCookie(true);
}

Handy Tips

Use setAcceptThirdPartyCookies for API level 21 and above.

Payment Callbacks to iOS Native Code

WKWebView framework is used to implement a bridge between JavaScript and the native code as UIWebView does not provide this functionality. The bridge is added by passing an instance of WKScriptMessageHandler and a string (which is the name of the bridge).

webView.configuration.userContentController.add(self, name: "PaymentJSBridge")

The instance of WKScriptMessageHandler which is passed needs to implement a function userContentController(WKUserContentController, WKScriptMessage). Once the function is implemented, the data is sent by JavaScript and can be retrieved inside the function.

public func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) {
  if let messageBody = message.body as? [AnyHashable:Any]{

  }
}

At the JavaScript end, data is sent to the iOS native code by evaluating the following JavaScript.

window.webkit.messageHandlers.PaymentJSBridge.postMessage(messageBody)

Handy Tips

Only the function userContentController can be called from the JavaScript by evaluating the above-mentioned script. The messageBody passed by the script must contain the appropriate data to control the flow of the native code.