# ETH Shanghai Hackathon 2022 - Recap With KNN3 Network

**Published by:** [KNN3.xyz](https://paragraph.com/@knn3/)
**Published on:** 2022-07-07
**URL:** https://paragraph.com/@knn3/eth-shanghai-hackathon-2022-recap-with-knn3-network

## Content

After 14 days of BUIDLing, the first-ever ETH Shanghai Hackathon yielded in 200 submissions with over 900 participants in total successfully, all of which were inseparable and innovative in their own ways. As one of a sponsor and a member of the judges, KNN3 Network was pleased to see 24 impressive finalist projects presenting in the demo day, from which of the following 6 magnificent projects were empowered by KNN3 Network.MetaMail (Gold Prize)MetaMail (metamail.ink) is the Web3 email provider. With MetaMail users use wallet/ENS as an email address, and sign/encrypt to ensure security. All those features are totally free. In EthShanghai, MetaMail uses the KNN3 Network for user recommendation and RSS3 for following relationships.MetaMail X KNN3 NetworkKNN3 provides a powerful yet easy-to-use service; The best part is that the recommendation algorithm is pluggable, and new recommendation methods can be used in the future as the project develops, or as the user prefers.AdressInsightAddressInsight is a data interface and analysis platform for Ethereum addresses. The two main problems that AddressInsight solves are trust and readability. AddressInsight calculates a "Trust Score" for each address, based off a number of data point concerning their on-chain activities. This enables anyone to get a quick second opinion on someone they may be interacting with.AddressInsight X KNN3 NetworkAddressInsight builds off KNN3 and RSS3 to make up the Interface Layer and part of the Analysis Layer, thus completing the stack. Of course, this is simplifying it to some degree, but it's a useful abstraction with which to think about how AddressInsight interacts with KNN3 and RSS3, and to understand where it fits into the overall efforts made by those technologies.Proof of soulBuilding for the fundamental layer of the decentralized society, Proof of Soul is a permissionless Soundboud token issuance/attestation protocol that enables people to bring relationship on-chain.Proof of Soul X KNN3 NetworkProof of Soul aims to provide a new way to resolve on-chain relationships, and we also create a new, non-transferable credential on-chain. This relationship can be integrated into DCP and open-sourced in the future, enabling future D/Apps, data researchers, and On-chain Campaigns.ShorumShorum is a platform where you can back a Web3 User and also share your profit with your backers, or we can call it an abstracted native Web3 Social payment channel. We utilize KNN3 Network to discover your on-chain relations to invite your potential backers.Shorum X KNN3 NetworkKNN3 provided a graphql interface for you to query a number of users based on your relation search. It is interesting to see how those addresses returned by the query are related to you. Some have invested in the same project and some may have attended the same event that you may or not know.ARSocial-platform algorithm provides a unified market access standards and has automatic deployment. Developers can provide their own algorithm for the use of other developers, and update algorithms, maintenance, and other operations.AR X KNN3 NetworkBased on the KNN3 graph database and some open algorithms, AM has established an open platform that allows users to choose algorithms independently. Thanks to KNN3's graphql interface, we implement a simple cross-item recommendation function. In the future, this feature can be considered as a front-end plugin, where users can achieve their different purposes by switching algorithms in the front-end.OzonoOzono app makes Web3 social discovery quick and easy with the ability to profile and answer questions about users/wallets, ENS, NFTs, and events. Individuals and organizations are going to be able to dive into Web3 social data and analyze it fast, in a structured and transparent way not seen before.Ozono X KNN3 NetworkBuilding a straightforward and powerful analytical tool in such a few days is not easy, but the workshop, documentation, and support from KNN3 Network team was outstanding. Their GraphQL API is well designed, with powerful pagination and speed. It allowed us to use it with a lightweight and blazing fast GraphQL client such as urql to deliver insights at the speed the Web3 social data users require.Things not to missThomas Yu, the co-founder of KNN3 shared his experience of "Building Web3 Social dApp on top of KNN3 Network" during the #ETHShanghaiHackthon On-chain Data Workshop. Check it out here. We would like to express our congratulations to all winners of ETH Shanghai Hackathon 2022, and gratitude towards ETHShanghai for organizing such a wonderful event. Our journey to Web3 is just beginning, we are glad to have you all onboard. “We are excited to see KNN3 Network as a vital infrastructure on building Web3 application scenarios, such as email, on-chain games, payment, social relations and more. We hope to develop together with these projects to continuously enrich the Web3 landscape.” -Thomas Yu, Co-founder of KNN3 NetworkAbout KNN3 NetworkKNN3 Network is Web3 Relationship aggregator on multi-blockchains. Empowering web3 social discovery & user enabling. KNN3 Network provides graph solutions for web3 multiverse relational aggregation to empower Social d/App and AI analytics. KNN3 aims to become a community-driven data curation protocol to enable on-chain data collaboration. Website | Twitter | Discord | Mirror | Medium

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