Participation at ETHGlobal Lisbon Hackathon 2023

We participated and had a lot of fun, May 2023

Project showcase and video

In this hackathon we didn’t win any prize, but met a lot of great people!


This project creates a way for real persons, proven by World ID, to register their world username to be shared among all lens social apps. The username is like the twitter handle for all apps. Each username is represented by an NFT and there is a staking auction to compete for each name. When a username is earned, it will be owned for an year and, after that, ownership can be challenged in an auction again. When an owner is expired or outbid, the ETH stake is returned, meaning the username registration is free.

Implementation Details

This project provides a real person with a world username, that can be shared among all lens social apps. It uses Open Zeppelin contracts for ERC721 NFT standard. Couldn’t finish the project as my younger kid got sick and had to go home early. But will continue to work on this after the hackathon because I think this is a useful idea.

Please check the docs repository for more details

Our final code for this hackathon is in GitHub

We had so much fun… And lack of sleep too… :)