Flutter

<key>LSApplicationQueriesSchemes</key>
<array>
  <string>metamask</string>
  <string>trust</string>
  <string>safe</string>
  <string>rainbow</string>
  <!-- Add other wallet schemes names here -->
</array>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android">

    <queries>
        <package android:name="io.metamask"/>
        <package android:name="com.wallet.crypto.trustapp"/>
        <package android:name="io.gnosis.safe"/>
        <package android:name="me.rainbow"/>
        <!-- Add other wallet schemes names here -->
    </queries>

    <application>
        ...
    </application>
</manifest>

<key>LSApplicationQueriesSchemes</key>
<array>
  <string>cbwallet</string>
  <!-- Any other scheme previously added -->
</array>

import CoinbaseWalletSDK

override func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any] = [:]) -> Bool {
    if #available(iOS 13.0, *) {
      if (CoinbaseWalletSDK.isConfigured == true) {
        if (try? CoinbaseWalletSDK.shared.handleResponse(url)) == true {
            return true
        }
      }
    }

    return super.application(app, open: url, options: options)
}

override func application(_ application: UIApplication, continue userActivity: NSUserActivity, restorationHandler: @escaping ([UIUserActivityRestoring]?) -> Void) -> Bool {
    if #available(iOS 13.0, *) {
      if (CoinbaseWalletSDK.isConfigured == true) {
        if let url = userActivity.webpageURL,
            (try? CoinbaseWalletSDK.shared.handleResponse(url)) == true {
            return true
        }
      }
    }

    return super.application(application, continue: userActivity, restorationHandler: restorationHandler)
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android">

    <queries>
        <package android:name="org.toshi"/>
        <!-- Any other scheme previously added -->
    </queries>

    <application>
        ...
    </application>
</manifest>

import 'package:flutter/foundation.dart';
import 'package:flutter/services.dart';
import 'package:reown_appkit/modal/i_appkit_modal_impl.dart';

class DeepLinkHandler {
  static const _eventChannel = EventChannel('com.exampledapp/events');
  static late IReownAppKitModal _appKitModal;

  static void init(IReownAppKitModal appKitModal) {
    if (kIsWeb) return;

    try {
      _appKitModal = appKitModal;
      _eventChannel.receiveBroadcastStream().listen(_onLink, onError: _onError);
    } catch (e) {
      debugPrint('[SampleDapp] checkInitialLink $e');
    }
  }

  static void _onLink(dynamic link) async {
    try {
      _appKitModal.dispatchEnvelope(link);
    } catch (e) {
      print(e);
    }
  }

  static void _onError(dynamic error) {
    print(error);
  }
}

import Flutter
import UIKit

@main
@objc class AppDelegate: FlutterAppDelegate {
  private static let EVENTS_CHANNEL = "com.exampledapp/events"
  private var eventsChannel: FlutterEventChannel?
  private let linkStreamHandler = LinkStreamHandler()

  override func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    GeneratedPluginRegistrant.register(with: self)

    let controller = window.rootViewController as! FlutterViewController
    eventsChannel = FlutterEventChannel(name: AppDelegate.EVENTS_CHANNEL, binaryMessenger: controller.binaryMessenger)
    eventsChannel?.setStreamHandler(linkStreamHandler)

    if let userActivityDictionary = launchOptions?[.userActivityDictionary] as? [String: Any],
      let userActivity = userActivityDictionary["UIApplicationLaunchOptionsUserActivityKey"] as? NSUserActivity,
      userActivity.activityType == NSUserActivityTypeBrowsingWeb {

      handleIncomingUniversalLink(userActivity: userActivity)
    }

    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }

  override func application(_ app: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any] = [:]) -> Bool {
    return linkStreamHandler.handleLink(url.absoluteString)
  }

  override func application(_ application: UIApplication, continue userActivity: NSUserActivity, restorationHandler: @escaping ([UIUserActivityRestoring]?) -> Void) -> Bool {
    if userActivity.activityType == NSUserActivityTypeBrowsingWeb {
      handleIncomingUniversalLink(userActivity: userActivity)
      return true
    }

    return false
  }

  private func handleIncomingUniversalLink(userActivity: NSUserActivity) {
    if let url = userActivity.webpageURL {
      print("App launched with Universal Link: \(url.absoluteString)")
      let _ = linkStreamHandler.handleLink(url.absoluteString)
    }
  }
}

class LinkStreamHandler: NSObject, FlutterStreamHandler {
  var eventSink: FlutterEventSink?
  var queuedLinks = [String]()

  func onListen(withArguments arguments: Any?, eventSink events: @escaping FlutterEventSink) -> FlutterError? {
    self.eventSink = events
    queuedLinks.forEach({ events($0) })
    queuedLinks.removeAll()
    return nil
  }

  func onCancel(withArguments arguments: Any?) -> FlutterError? {
    self.eventSink = nil
    return nil
  }

  func handleLink(_ link: String) -> Bool {
    guard let eventSink = eventSink else {
      queuedLinks.append(link)
      return false
    }
    eventSink(link)
    return true
  }
}

package dapp.example

import io.flutter.embedding.android.FlutterActivity
import android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent
import android.os.Bundle
import io.flutter.plugin.common.EventChannel

class MainActivity: FlutterActivity() {
  private val eventsChannel = "com.exampledapp/events"
  private var linksReceiver: BroadcastReceiver? = null

  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)

    EventChannel(flutterEngine?.dartExecutor?.binaryMessenger, eventsChannel).setStreamHandler(
      object : EventChannel.StreamHandler {
        override fun onListen(args: Any?, events: EventChannel.EventSink) {
          linksReceiver = createChangeReceiver(events)
        }
        override fun onCancel(args: Any?) {
          linksReceiver = null
        }
      }
    )
  }

  override fun onNewIntent(intent: Intent) {
    super.onNewIntent(intent)
    if (intent.action === Intent.ACTION_VIEW) {
      linksReceiver?.onReceive(this.applicationContext, intent)
    }
  }

  fun createChangeReceiver(events: EventChannel.EventSink): BroadcastReceiver? {
    return object : BroadcastReceiver() {
      override fun onReceive(context: Context, intent: Intent) {
        val dataString = intent.dataString ?:
        events.error("UNAVAILABLE", "Link unavailable", null)
        events.success(dataString)
      }
    }
  }
}