Use Magic with the Ethereum blockchain

Authentication is a critical component in web application development, and Magic, formerly known as Fortmatic, has become a significant player in the blockchain ecosystem with its Magic Auth product. This comprehensive tutorial explores the integration of Magic with the Ethereum blockchain, detailing the setup of a smart contract, authentication process using Magic, and writing to the blockchain. Magic Auth simplifies passwordless authentication by allowing developers to integrate it into web applications with minimal code, supporting over 20 blockchains, including Ethereum, for seamless user onboarding. The tutorial guides users through setting up Magic and the web3.js library, writing and compiling a basic smart contract, and authenticating users who can then interact with the blockchain. This process involves updating contract properties, managing blockchain interactions, and understanding the costs associated with transactions, such as gas fees. The tutorial emphasizes the ease of using Magic to enhance blockchain-based applications, offering a practical approach to developing decentralized apps with secure authentication.