@appfastfly/react-native

React Native SDK for Appfastfly — mobile deep linking & attribution.

Features

• Deep Linking — Universal Links (iOS) + App Links (Android) + URI schemes
• Deferred Deep Links — attribute installs to the original link via device fingerprint, clipboard token, and install referrer
• Link Creation — generate trackable short links with custom payloads and Open Graph metadata
• User Identity — associate devices with user IDs for cross-device attribution
• Event-driven — subscribe to deep link events with automatic caching

Requirements

Platform	Minimum version
iOS	15.0+
Android	API 24+ (7.0)
React Native	0.76+ (New Architecture / TurboModules)

Note: This SDK requires the New Architecture (TurboModules) which is enabled by default starting from React Native 0.76. It does not support the old architecture (Bridge).

Installation

yarn add @appfastfly/react-native
# or
npm install @appfastfly/react-native

iOS — install CocoaPods:

cd ios && bundle exec pod install

Android — no additional steps, Gradle auto-links the module.

---

1. Native Configuration

iOS — Info.plist

<key>AppfastflyApiKey</key>
<string>YOUR_API_KEY</string>

Optionally override the service URL (defaults to https://api.appfastfly.io.vn):

<key>AppfastflyServiceUrl</key>
<string>https://your-custom-api.com</string>

Android — AndroidManifest.xml

Add inside the <application> tag:

<meta-data
    android:name="com.appfastfly.API_KEY"
    android:value="YOUR_API_KEY" />

Optionally override the service URL:

<meta-data
    android:name="com.appfastfly.SERVICE_URL"
    android:value="https://your-custom-api.com" />

Get your API key from the Appfastfly Dashboard.

---

2. Deep Links Setup

iOS

Associated Domains

In Xcode > target > Signing & Capabilities > Associated Domains, add:

applinks:link.yourdomain.com

AppDelegate (Objective-C)

// AppDelegate.mm
#import <AppfastflyDeepLinkModule.h>

- (BOOL)application:(UIApplication *)application
    continueUserActivity:(NSUserActivity *)userActivity
    restorationHandler:(void (^)(NSArray<id<UIUserActivityRestoring>> *))handler
{
  [AppfastflyDeepLinkModule continueUserActivity:userActivity];
  return YES;
}

- (BOOL)application:(UIApplication *)application
    openURL:(NSURL *)url
    options:(NSDictionary<UIApplicationOpenURLOptionsKey, id> *)options
{
  [AppfastflyDeepLinkModule openURL:url];
  return YES;
}

AppDelegate (Swift)

// AppDelegate.swift
import AppfastflyDeepLinkModule

func application(
  _ application: UIApplication,
  continue userActivity: NSUserActivity,
  restorationHandler: @escaping ([UIUserActivityRestoring]?) -> Void
) -> Bool {
  AppfastflyDeepLinkModule.continue(userActivity)
  return true
}

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

URL Scheme (recommended)

In Xcode > target > Info > URL Types, add your custom scheme (e.g. myapp).

---

Android

AndroidManifest.xml — Intent Filters

Add inside your MainActivity tag:

<activity
    android:name=".MainActivity"
    android:launchMode="singleTask"
    android:exported="true">

    <!-- App Links -->
    <intent-filter android:autoVerify="true">
        <action android:name="android.intent.action.VIEW" />
        <category android:name="android.intent.category.DEFAULT" />
        <category android:name="android.intent.category.BROWSABLE" />
        <data android:scheme="https"
              android:host="link.yourdomain.com" />
    </intent-filter>

    <!-- URI Scheme -->
    <intent-filter>
        <action android:name="android.intent.action.VIEW" />
        <category android:name="android.intent.category.DEFAULT" />
        <category android:name="android.intent.category.BROWSABLE" />
        <data android:scheme="myapp" />
    </intent-filter>
</activity>

MainActivity (Kotlin)

import android.content.Intent
import android.os.Bundle
import com.appfastfly.deeplink.AppfastflyDeepLinkModule

class MainActivity : ReactActivity() {
  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    AppfastflyDeepLinkModule.handleIntent(intent)
  }

  override fun onNewIntent(intent: Intent) {
    super.onNewIntent(intent)
    setIntent(intent)
    AppfastflyDeepLinkModule.handleIntent(intent)
  }
}

---

3. Usage

Initialize

Call once at app startup, before any navigation:

import { Appfastfly } from '@appfastfly/react-native';

await Appfastfly.init();

Subscribe to Deep Links

const unsubscribe = Appfastfly.subscribe((event) => {
  console.log('Payload:', event.payload);
  console.log('First session?', event.isFirstSession);

  if (event.payload.screen) {
    navigation.navigate(event.payload.screen, event.payload);
  }
});

// Clean up when done
unsubscribe();

Full Example

import React, { useEffect } from 'react';
import { Appfastfly } from '@appfastfly/react-native';

function App() {
  useEffect(() => {
    Appfastfly.init();

    const unsubscribe = Appfastfly.subscribe((event) => {
      if (event.payload.productId) {
        navigation.navigate('Product', { id: event.payload.productId });
      }
    });

    return unsubscribe;
  }, []);

  return <MainNavigator />;
}

Read Cached Params

const latest = Appfastfly.getLatestParams();
const first = Appfastfly.getFirstParams();

Create Links

const link = await Appfastfly.createLink({
  payload: { screen: 'Product', productId: '123' },
  channel: 'social',
  campaign: 'summer-sale',
  ogTitle: 'Check out this product!',
  ogDescription: 'Get 20% off with this link',
  ogImageUrl: 'https://example.com/product.jpg',
});

console.log(link.url);
// → https://link.myapp.com/l/abc123

User Identity

// Associate device with a user
await Appfastfly.setIdentity('user-456');

// Remove association
await Appfastfly.logout();

---

4. API Reference

Appfastfly.init()

Initialize the SDK. Must be called once before any other method. Reads configuration from native (Info.plist / AndroidManifest).

Returns: Promise<void>

Appfastfly.subscribe(listener)

Listen for deep link events. If params are already available, fires the callback immediately.

Parameter	Type	Description
listener	(event: DeepLinkEvent) => void	Callback on event

Returns: () => void — unsubscribe function

interface DeepLinkEvent {
  url?: string;
  payload: Record<string, any>;
  matchMethod?: string;
  matchConfidence?: number;
  isFirstSession: boolean;
}

Appfastfly.getLatestParams()

Returns the most recent deep link payload, or null.

Appfastfly.getFirstParams()

Returns the payload from the install-attributed deep link (first session only), or null.

Appfastfly.createLink(params)

Create a trackable short link.

interface CreateLinkParams {
  payload: Record<string, any>;
  ogTitle?: string;
  ogDescription?: string;
  ogImageUrl?: string;
  channel?: string;
  campaign?: string;
  tags?: string[];
  iosRedirectUrl?: string;
  androidRedirectUrl?: string;
  webRedirectUrl?: string;
  expiresAt?: string;
}

Returns: Promise<{ shortCode: string; url: string }>

Appfastfly.setIdentity(userId)

Associate the current device with a user ID for cross-device attribution.

Appfastfly.logout()

Remove the current device-user association.

---

5. Troubleshooting

Universal Links not opening the app (iOS)

• Verify applinks: in Associated Domains matches your link domain exactly
• Ensure the Apple App Site Association (AASA) file is served over HTTPS with a valid certificate
• Long-press a link in Safari to verify "Open in App" appears

App Links not opening the app (Android)

• Verify assetlinks.json is accessible at https://your-domain/.well-known/assetlinks.json
• The SHA-256 fingerprint must match your signing certificate
• android:autoVerify="true" must be set on the intent-filter

No events in subscribe()

• Ensure init() is called before subscribe()
• Verify continueUserActivity: (iOS) or handleIntent() (Android) is wired in your AppDelegate / MainActivity
• Check native logs for [Appfastfly] warnings

---

Contributing

See the contributing guide to learn how to contribute to the repository and the development workflow.

License

MIT