Web3Auth Android SDK

Web3Auth is where passwordless auth meets non-custodial key infrastructure for Web3 apps and wallets. By aggregating OAuth (Google, Twitter, Discord) logins, different wallets and innovative Multi Party Computation (MPC) - Web3Auth provides a seamless login experience to every user on your application.

📖 Documentation

Checkout the official Web3Auth Documentation and SDK Reference to get started!

🔁 Migrating from v10 → v11

Auth v11 uses citadel session tokens (sessionId, accessToken, refreshToken, idToken) and Wallet Services v6.

Steps

1. Bump the dependency to 11.x:

   implementation 'com.github.web3auth:web3auth-android-sdk:11.0.0'

2. Remove any MFALevel.DEFAULT usages. Use only OPTIONAL, MANDATORY, or NONE.
3. Stop hard-coding /v10 auth or dashboard URLs. Rely on SDK defaults from authBuildEnv (PRODUCTION / STAGING use /v11; TESTING stays unversioned).
4. After constructing Web3Auth, call initialize() so the session rehydrates via citadel (SFA falls back to session-service when citadel authorize fails).
5. Prefer getAccessToken() and getUserInfoAsync() when you need token-backed identity data. Use refreshSession() to re-authorize; logout() clears citadel tokens.
6. Optional whitelabel consent:

   WhiteLabelData(
       appName = "My App",
       consentRequired = true,
       tncLink = "https://example.com/terms",
       privacyPolicy = "https://example.com/privacy",
   )

7. Re-test login, session restore, MFA, showWalletUI() / request(), and logout on staging and production.

Breaking notes

Area	Change
Session	Citadel tokens via AuthSessionManager (SFA still falls back to session-service)
Auth / dashboard URLs	/v11 (do not hard-code /v10)
Wallet Services	Host /v6; launch passes citadel sessionId + accessToken
MFA	MFALevel.DEFAULT removed
Login audit	/start b64Params include recordId and loginSource
Whitelabel	Optional consentRequired, tncLink, privacyPolicy
Project config	Fetched from dashboard public API by buildEnv

💡 Features

• Plug and Play, OAuth based Web3 Authentication Service
• Fully decentralized, non-custodial key infrastructure
• End to end Whitelabelable solution
• Threshold Cryptography based Key Reconstruction
• Multi Factor Authentication Setup & Recovery (Includes password, backup phrase, device factor editing/deletion etc)
• Support for WebAuthn & Passwordless Login
• Support for connecting to multiple wallets
• DApp Active Session Management

...and a lot more

⏪ Requirements

• Android API version 24 or newer is required.
• compileSdkVersion needs to be 34

⚡ Installation

In your project-level settings.gradle file, add JitPack repository:

dependencyResolutionManagement {
     repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
     repositories {
         google()
         mavenCentral()
         maven { url "https://jitpack.io" } // <-- Add this line
     }
}

Then, in your app-level build.gradle dependencies section, add the following:

dependencies {
    // ...
    implementation 'com.github.web3auth:web3auth-android-sdk:11.0.0'
}

🌟 Configuration

Checkout SDK Reference to configure for Android.

💥 Getting Started

import com.web3auth.core.Web3Auth
import com.web3auth.core.types.Web3AuthOptions

class MainActivity : AppCompatActivity() {
    // ...
    private lateinit var web3Auth: Web3Auth

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        web3Auth = Web3Auth(
            Web3AuthOptions(
                context = this,
                clientId = "YOUR_WEB3AUTH_CLIENT_ID", // Pass over your Web3Auth Client ID from Developer Dashboard
                network = Network.MAINNET,
                redirectUrl = Uri.parse("{YOUR_APP_PACKAGE_NAME}://auth"),
            )
        )

        // Handle user signing in when app is not alive
        web3Auth.setResultUrl(intent?.data)
    }

    override fun onResume() {
        super.onResume()
        if (Web3Auth.getCustomTabsClosed()) {
            Toast.makeText(this, "User closed the browser.", Toast.LENGTH_SHORT).show()
            web3Auth.setResultUrl(null)
            Web3Auth.setCustomTabsClosed(false)
        }
    }
    
    override fun onNewIntent(intent: Intent?) {
        super.onNewIntent(intent)

        // Handle user signing in when app is active
        web3Auth.setResultUrl(intent?.data)

        // ...
    }

    private fun onClickLogin() {
        val selectedLoginProvider = Provider.GOOGLE   // Can be Google, Facebook, Twitch etc
        val loginCompletableFuture: CompletableFuture<Web3AuthResponse> = web3Auth.login(LoginParams(selectedLoginProvider))
        
        loginCompletableFuture.whenComplete { _, error ->
            if (error == null) {
                // render logged in UI
            } else {
                // render login error UI
            }

        }
    }
    
    //...
}

🩹 Examples

Checkout the examples for your preferred blockchain and platform in our examples

🌐 Demo

Checkout the Web3Auth Demo to see how Web3Auth can be used in an application.

Have a look at our Web3Auth PnP Android Quick Start to help you quickly integrate a basic instance of Web3Auth Plug and Play in your Android app.

Further checkout the app folder within this repository, which contains a sample app.

💬 Troubleshooting and Support

• Have a look at our Community Portal to see if anyone has any questions or issues you might be having. Feel free to reate new topics and we'll help you out as soon as possible.
• Checkout our Troubleshooting Documentation Page to know the common issues and solutions.
• For Priority Support, please have a look at our Pricing Page for the plan that suits your needs.