<receiver
 android:name=".app.otp.OtpErrorReceiver"
 android:enabled="true"
 android:exported="true" >
   <intent-filter>
       <action android:name="com.whatsapp.otp.OTP_ERROR"/>
   </intent-filter>
</receiver>

public class OtpErrorReceiver extends BroadcastReceiver {

 @Override
 public void onReceive(Context context, Intent intent) {
     WhatsAppOtpIncomingIntentHandler whatsAppOtpIncomingIntentHandler = new WhatsAppOtpIncomingIntentHandler();
     whatsAppOtpIncomingIntentHandler.processOtpDebugSignals(
                          whatsAppIntent,
                          // your function to handle the signal
                          (debugSignal) -> handleSignal(debugSignal),
                          // your function to handle any error
                          (error, exception) -> handleError(error, exception));
 }
}

public class OtpErrorReceiver extends BroadcastReceiver {
 public static final String OTP_ERROR_KEY = "error";
 public static final String OTP_ERROR_MESSAGE_KEY = "error_message";

 @Override
 public void onReceive(Context context, Intent intent) {
   try {
     PendingIntent pendingIntent = intent.getParcelableExtra("_ci_");
     if (pendingIntent != null) {
       String packageName = pendingIntent.getCreatorPackage();
       if (packageName.equalsIgnoreCase("com.whatsapp")
           || packageName.equalsIgnoreCase("com.whatsapp.w4b")) {
         String otpErrorKey = intent.getStringExtra(OTP_ERROR_KEY);
         String otpErrorMessage = intent.getStringExtra(OTP_ERROR_MESSAGE_KEY);
         // Handle errors
       }
     }
   } catch (BadParcelableException e) {
     Log.e("OtpErrorReceiver", e.getLocalizedMessage());
   }
 }
}