Metamask
[OAuth](https://texonom.com/oauth-b929c3f246b0415c90781a763262b164) 


Once a user has connected their MetaMask wallet, you as a developer can interact with the globally available Ethereum API (window.ethereum)






> [The Complete Guide to Full Stack Ethereum Development](https://www.freecodecamp.org/news/full-stack-ethereum-development/?utm_source=tldrnewsletter)




