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A look at the 12 ETHBogota Hackathon winners

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Who will Devcon's next unicorn be?

Original article by Peter Pan, Jack(0x137), BlockBeats

ETH Global also hosted its own hackathon event, ETHBogota, during Devcon, and today announced the final list of its hackathon projects. BlockBeats has a rundown of the items on the list:

frens

Frens is a streamlined dApp for pledging ETH with friends. By inviting friends to pool 32 ETH to launch a distributed verifier, users reduce the risk of pledging alone. The Frens is built on top of SSV, ensuring fault tolerance and performance, as well as improving the social and rewarding nature of pledging with friends in a mine pool.

In general, the pledge ETH has a certain threshold, requires a lot of technical knowledge and some infrastructure for the user, and is also very expensive (32 ETH is not cheap for a single pledge). Users may lose their ETH when they misconfigure the authentication node. Because of these challenges, most people choose to use centralized unmanaged pledge services like Coinbase or Kraken to pledge, which brings the risk of centralization.

How it works: Carriers create "pledge pool" smart contracts through a one-click button on Frens, which provides users with a simple UI link so that friends can deposit the necessary ETH for a full verifier, and only friends with this link can deposit ETH into the pledge pool. The UI is simple and easy to use. Once you have collected 32 ETH, you can start pledging on the Frens website.

Blobscan Explorer

Ipp-4844 introduces a new type of transaction to Ethereum that accepts blocks of data that are held in beacon nodes for a short time, which is good for storing data needed for summarization, such as modernism, Aztec, and Scroll. But the development tools to handle these new types of transactions are new, and the Blob Explorer hasn't been there yet.

Using Blobscan Explorer, this blob data can be navigated and visualized, providing the necessary infrastructure to scale Ethereum. The search box can also find block number and hash value, transaction hash, address, blob versioning hash, blob KZG, etc.

Bet Streams

Bet Streams is a pay-per-view live streaming platform that enables viewers to bet on the results of real-time streaming.

Bet Streams allows organizations to prepare, send notifications, and provide live pay-per-view feeds of various events, including key announcements, sporting events, travel challenges, and even Web3 hackathons.

Users can easily log into the platform through Web2 users' popular wallet and integration, and can also bet on the results that will be displayed during the live stream, including the final score of a game, the result of a skateboarding trick, or the winner of a hackathon, before or during the live stream. Once the result is announced, the winner will receive a proportional prize from the pool, while the loser will have to bet again to try his luck.

ETHernal Reviews

ETHernal Reviews is a Dapps rating platform. Users who log in using ETH addresses can only be rated by users who have interacted with a Dapp, ensuring the authenticity of users.

Users can now view Reviews of an item, databases tend to be centralized, and ETHernal Reviews will be stored as NFTS on IPFS. Each comment is written to the user's address, and no one can hide them.

Specifically, ETHernal Reviews uses Web3Modal to connect to review websites, uses Fast API and Vue in the front end, and builds with Python in the back end. As an example solution, ENS will also be selected to demonstrate the validation of valid addresses.

PULP

PULP is an unsecured loan agreement.

Currently, applying for a loan is a slow, time-consuming process, and borrowers often have to provide too much personal information about themselves. PULP's digital self-sovereign identity solution, integrated through Polygon ID technology, allows users to verify their credibility and score their reputation.

Superseed

Superseed is a DeFi DApp that simplifies the process by which users can not only automatically execute the dollar cost Averaging (DCA) strategy for cryptocurrency purchases, but also maximize the interest on their crypto gains while encouraging them to share profits for the public good.

In addition, Superseed is targeting users who hold and exchange cryptocurrencies but are not proficient in DeFi's more advanced strategies or don't have the time to police their DCA. Superseed will help them capture some of the value in DeFi, And entrusted funding for the further development of the Web 3 ecosystem and other ecosystems.

Coedia Network

Coedia Network is a decentralized social network for developers that aims to build a broader, stronger and more cohesive development community by building an open source help-and-earn framework to help solve high-priority code problems.

Features on Coedia include question requests with customizable bounties and sanctions, asynchronous reward problem resolution, and global reputation scores, and each proposal is given and updated by the community itself to create a participatory and cooperative community of web3 builders. The team built the application to help Web3 developers recover from corporate burnout, to help projects that had been put on hold due to early high-level code development, etc. The ultimate goal of the team is to reduce the amount of effort and time developers have to spend adopting new skills, while helping to build and grow a broader, stronger and more cohesive web3 community.

Zipline

Zipline is a truth-free Ethereum EVM cross-chain bridge with provable execution. The project uses Modernism Cannon's proof of fraud protocol to provably execute the Ethereum light client protocol on the EVM public chain, keeping the target EVM chain in sync with the Ethereum final block.

Zipline's off-chain repeater is used to submit the final block and the synchronization committee update, which contains the signature from the current synchronization committee and the proof derived from the next committee. Instead of performing signature verification on the chain, they perform off-chain and submit proof of execution on the chain. If the repeater commits fraud, any honest observer can prove it by submitting a challenge during the challenge. Once this period has expired, the update is assumed to be valid. This process is repeated every synchronization period (27 hours) to keep the target chain in sync with the Ethereum state.

Anonymous Vickrey Auctions On Chain

Anonymous Vickrey Auctions On Chain is a private auction agreement. By leveraging Create2-based smart contract creation, Vickrey auctions enables users to hide bids by transferring ETH to a future contract address, making on-chain bid submission appear like a separate, simple ETH transfer. In the reveal phase, bidders reveal their bids and use ETH to deploy the contract to the pre-funded address.

Unlike a typical Vickrey auction based on a submit and reveal scheme, it is impossible to know which address actually bid in a given auction without relying on additional off-chain data. To ensure that users are unable to adjust bids during the disclosure phase, a snapshot of the blockchain status is taken, and users submit proof of Merkle Patricia Trie account balance, as well as their disclosure indicating the existence of a reveal phase before their bids begin.

diZKreet

diZKreet is an NFT privacy layer infrastructure using Aztec's Privacy zkRollup technology.

Aztec provides a set of tools to ensure the privacy of individuals on the Ethereum blockchain. The diZKreet team used this to create a ZK Rollup bridge to anonymously and privately cast a collection of NFTS, where the Ethereum master network is used to record the users on Aztec who have purchased NFTS, But no one knew who did it until it was redeemed on the main network. While NFTS remain in the Rollup Bridge contract, the owner of the NFT will have a virtual zkNFT. This zkNFT can be exchanged and traded privately, or it can be redeemed from the bridge engagement engagement for an NFT. Our zkNFT shielded bridge is fully compatible with any ERC-721 NFTS on Ethereum. Any NFTS can now be privately purchased through diZKreet.

ClubSpace

ClubSpace is a live listening party for music creators, who can share their curated music NFTS with their fans and friends on Lens.

The project allows creators to create a club space party by importing their Spinamp playlists, setting the Decent NFTS they promote, setting Lens posts, and finally setting the free NFTS that party attendees receive. On the Live Club Space page, connected Lens accounts can view each other's avatars, listen to playlists and send reactions via the p2p pub/sub network.

txn. xyz

txn.xyz is a dedicated web application for Ethereum transactions. This transaction page allows connections through any wallet and allows any transaction to be requested from the user. All the functions of the application can be implemented through a URL coding system, no server, no state.