Traditional authentication methods like email with passwords and social logins create user friction and dependency on centralized services.
Web3 wallets are key pairs, not containers for money, that enable users to sign data cryptographically without paying gas fees.
A user connects their wallet, the backend generates a unique number (nonce), and the user signs it to prove ownership.
The frontend uses Ethers.js to interact with the wallet's global object, request the user's account, and get a signer instance.
Serverless API routes handle user creation, generate a unique nonce, and later verify the signature by decoding it.
See the complete authentication flow in action, from clicking the connect button to the MetaMask signature request and successful login.
Wallet data is managed by providers like MetaMask, and Ethers.js was chosen over Web3.js for its developer-friendly documentation.
WalletConnect enables mobile wallet access, and account recovery currently relies on seed phrases, with social recovery being explored.
While no direct Auth0 equivalent exists yet for Web3, services are emerging, and this system only stores the user's public wallet address.
Sensory-Minds GmbH
Offenbach am Main, Germany
Bitpanda
Vienna, Austria
40:45Josh Goldberg
27:55Gift Egwuenu
49:40Wisdom Nwokocha
53:58Soumaya Erradi
29:31Adam Larter
32:32Clemens Hübner
49:52Yedidya Schwartz
42:19Soumaya Erradi
Jobs that call for the skills explored in this talk.
Multiplied
The Hague, Netherlands
APN Healthcare Solutions
Los Alamitos, United States of America
Stack Builders
New York, United States of America
Homeflow Ltd
Dartford, United Kingdom
