Installation and setup

import android.webkit.WebView;
import android.webkit.WebSettings;
import android.webkit.JavascriptInterface;
import android.util.Log;
import org.json.JSONObject;

// Set up WebView
WebView webView = findViewById(R.id.webview);
WebSettings webSettings = webView.getSettings();
webSettings.setJavaScriptEnabled(true);

// Add JavaScript interface to handle events from WebView
webView.addJavascriptInterface(new TravelRuleBridge(), "TravelRuleBridge");

// Load your HTML file with the widget
webView.loadUrl("file:///android_asset/travel-rule-widget.html");

// JavaScript interface class to handle WebView events
public class TravelRuleBridge {
  @JavascriptInterface
  public void onMessage(String messageJson) {
    try {
      JSONObject message = new JSONObject(messageJson);
      String type = message.getString("type");
      Object data = message.opt("data");

      runOnUiThread(() -> {
        switch (type) {
          case "complete":
            handleTravelRuleComplete(data != null ? data.toString() : null);
            break;
          case "cancel":
            handleTravelRuleCancel();
            break;
          case "error":
            handleTravelRuleError(data != null ? data.toString() : null);
            break;
          default:
            Log.w("TravelRule", "Unknown Travel Rule widget message type: " + type);
        }
      });
    } catch (Exception e) {
      Log.e("TravelRule", "Error parsing Travel Rule widget message", e);
    }
  }

  private void handleTravelRuleComplete(String data) {
    // Handle successful Travel Rule compliance completion
    Log.d("TravelRule", "Travel Rule form completed: " + data);
    // Proceed with the crypto transaction
  }

  private void handleTravelRuleCancel() {
    // Handle Travel Rule process cancellation
    Log.d("TravelRule", "Travel Rule form cancelled by user");
    // Navigate back or show cancellation message
  }

  private void handleTravelRuleError(String error) {
    // Handle Travel Rule error
    Log.e("TravelRule", "Travel Rule form error: " + error);
    // Show error message to user
  }
}

import { WebView } from 'react-native-webview';
import { Alert } from 'react-native';

const TravelRuleScreen = () => {
  const handleMessage = (event) => {
    try {
      const message = JSON.parse(event.nativeEvent.data);

      switch (message.type) {
        case 'complete':
          handleTravelRuleComplete(message.data);
          break;
        case 'cancel':
          handleTravelRuleCancel();
          break;
        case 'error':
          handleTravelRuleError(message.data);
          break;
        default:
          console.log('Unknown message type:', message.type);
      }
    } catch (error) {
      console.error('Error parsing WebView message:', error);
    }
  };

  const handleTravelRuleComplete = (data) => {
    // Handle successful Travel Rule compliance completion
    console.log('Travel Rule form completed:', data);
    Alert.alert('Success', 'Travel Rule compliance completed!');
    // Proceed with the crypto transaction
  };

  const handleTravelRuleCancel = () => {
    // Handle Travel Rule process cancellation
    console.log('Travel Rule form cancelled by user');
    Alert.alert('Cancelled', 'Travel Rule process was cancelled');
    // Navigate back
  };

  const handleTravelRuleError = (error) => {
    // Handle Travel Rule error
    console.error('Travel Rule form error:', error);
    Alert.alert('Error', 'An error occurred during Travel Rule compliance');
    // Show error message or retry option
  };

  return (
    <WebView
      source={{ uri: 'file:///path/to/travel-rule-widget.html' }}
      javaScriptEnabled={true}
      domStorageEnabled={true}
      onMessage={handleMessage}
    />
  );
};