On May 6, 2024, ETHGlobal Sydney announced the eight winning projects after a three-day hackathon from May 3 to 5. They are: Relief Link, HoverChain, Retake//Regen, Cache Coherence, 0xPoll, Roman Kyoto, Zeke, AlibudaHabitBuilder

ETHGlobal Sydney is sponsored by projects such as Worldcoin, Unlimit, Chainlink, Mantle, Nethermind, Avail, Base, etc., with a total prize of US$100,000.

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The following is a brief introduction to these eight projects:

Relief Link is an innovative service designed to automatically distribute aid immediately after a disaster, leveraging blockchain technology for efficient and secure operations. It integrates Chainlink oracles for real-time disaster monitoring and automated transactions, ensuring timely assistance to those affected within a specific geographic range. The system attracts users, even those new to cryptocurrency, through account abstraction from Unlimit and third-party networks, allowing for convenient access to fiat currency options. Personhood is verified using Worldcoin to maintain system integrity and prevent fraud, ensuring that aid is allocated once for each verified user.

HoverChain

HoverChain is a Google Chrome extension that provides an in-browser tool for accessing blockchain data while browsing. Simply select a blockchain identifier (such as an Ethereum address or contract) to display a detailed popup with important statistics such as wallet balances, recent transactions, and available smart contract interactions.

Retake//Regen

Retake // Regen is an Eigenlayer AVS public product that allows Ethereum validators to commit to offsetting a small portion of the network’s carbon emissions by purchasing and retrieving high-quality carbon credits.

Retake//Regen is also a cross-chain application that is tightly integrated with many other protocols. It consists of two main components: 1. Retake//Regen Eigenlayer AVS (Ethereum L1) 2. Funding pool (Base L2), and relies on: Eigenlayer for staking and slashing, Base for hosting carbon accounting and pool contracts, CCIP for arbitrary messages from Base to Ethereum in the event of attempted penalties, WorldID for registration and resistance to witch attacks, and Toucan Protocol for obtaining tokenized, audited, high-quality carbon credits.

Cache Coherence

Cache Coherence uses CCIP and World Coin's Account Abstraction Smart Wallet extension to recover lost keys. Cache Coherence is an extension of the EIP-4337 Account Abstraction Smart Contract Wallet that can be deployed on any EVM chain. Wallet setup includes setting up a WorldCoin ID. The WorldCoin ID provides secondary authentication and can be used as a recovery method when keys are lost. However, there are a limited number of chains that support the WorldCoin login verification method. Therefore, CCIP is used to build a bridge between the account wallet and the WorldCoin validator. CCIP is bidirectional and allows proofs to be sent from an account to WorldCoin. Upon successful or failed verification, the response is sent back to the account via CCIP.

0xPoll

0xPoll aims to create an application that allows users to link their WorldID to their electoral roll details and then interact with a voting platform that reflects the legislation of the Australian Federal Parliament without revealing any personal information. 0xPoll will host a mirror of the Federal Parliament, allowing citizen users to vote on individual legislation. Voting results will be collected at the electorate level to effectively lobby current members of parliament.

Roman Kyoto

Roman Kyoto is a cross-chain multi-asset shielded pool (MASP) that allows users to deposit ERC-20 tokens and then transfer them privately. Users can then withdraw tokens from the pool at any time and can withdraw the desired amount (up to the current balance in the MASP).

Zeke

Zeke is the first zero-knowledge powered Paypal on-ramp, allowing anyone to enter the crypto world (converting fiat currencies to stablecoins) in a fully decentralized peer-to-peer way through off-chain payment channels (such as Venmo and PayPal) through Telegram Bots. Zeke has Telegram native integration and account abstraction for a seamless user experience.

AlibudaHabitBuilde

AlibudaHabitBuilde is a habit-forming project that encourages people to develop new habits through a unique staking system. Users first sign up through the Base smart wallet in 3 clicks. To participate in the challenge, users will stake a certain amount as a symbol of their commitment to the habit they wish to develop.

AlibudaHabitBuilde offers two habit-building pathways: one for mental health and the other for physical health. To improve mental health, participants are encouraged to enjoy nature and interact with friends offline. Participation can be confirmed by tapping the ARX NFC at a designated location. For physical health, AlibudaHabitBuilde is integrating with Strava so that exercise records can be logged directly into Alibuda. Participants who maintain these habits have the opportunity to win unique NFTs as well as a share of the funds of unsuccessful participants.