firebase-jwt-example

MetaMask Embedded Wallets — Firebase (JWT)

React + Vite example using MetaMask Embedded Wallets (powered by Web3Auth) with a Firebase authentication connection via the JWT flow. Firebase issues the ID token; Web3Auth validates it against the Firebase JWKS endpoint and derives the user's wallet.

Prerequisites

• Node.js 20+
• npm
• A Client ID from the Dashboard
• A Firebase project with Authentication enabled
• A custom Firebase connection configured on the Dashboard (Firebase guide)

Setup

1. Clone the repository

git clone https://github.com/Web3Auth/web3auth-examples.git
cd web3auth-examples/custom-authentication/single-connection/firebase-jwt-example

2. Install dependencies

npm install

3. Configure environment variables

cp .env.example .env

Edit .env:

VITE_WEB3AUTH_CLIENT_ID=YOUR_CLIENT_ID

4. Run the application

npm run dev

Visit http://localhost:5173 in your browser.

Resources

• MetaMask Embedded Wallets Documentation
• Firebase Integration Guide
• Dashboard
• Community — Builder Hub

License

MIT