A Review of the 11 Final Projects from ETHGlobal Tokyo Hackathon
Involves multiple fields such as wallets, NFTs, DeFi, social, payments, and security.Source: Azuma, Planet Daily
On April 16, the ETHGlobal Tokyo themed hackathon held in Tokyo, Japan officially concluded.
This hackathon ultimately selected 11 finalist projects, covering various fields such as wallets, NFTs, DeFi, social, payments, and security. These projects will collectively share a prize pool of $375,000 provided by ETHGlobal in collaboration with 1inch, Taiko, Mina, Polygon, Lens, and 36 other projects. Next, Odaily Planet Daily will take you to learn about these 11 finalist projects.
ZKVoiceKey
Award homepage: https://ethglobal.com/showcase/zkvoicekey-zeufj
ZKVoiceKey provides a new method to recover wallet private keys through voice.
Traditionally, the recovery of private keys is limited by social recovery and device dependency, while ZKVoiceKey's solution allows users to register their voice on the blockchain in advance, enabling recovery through unique biometric information in case the private key is lost.
ZKVoiceKey also employs Fuzzy Commit and ZKP to avoid directly storing voice information on the blockchain, allowing for identity verification through fuzzy matching of voice.
BAILOUT
Award homepage: https://ethglobal.com/showcase/bailout-ia6s1
BAILOUT can be understood as a secure channel that supports multiple types of wallets, allowing users to safely move assets between EOA, contract wallets, and cold wallets.
With the development of the account abstraction concept, more and more contract wallets have emerged in the market, such as Argent and Safe. However, Dapps like Uniswap still do not support direct connections with these contract wallets, so many individual investors typically use regular EOA wallets for various interactions and store most of their assets in cold wallets or contract wallets.
With BAILOUT, users can easily transfer a certain amount of assets from EOA wallets to contract wallets and can sign transactions through EOA wallets, even supporting Google Sign-in for transaction signing in emergencies.
BAILOUT also supports social recovery functionality. If users accidentally lose their EOA private key or device, it allows them to transfer all assets to a cold wallet with one click, without paying any gas fees for the wallet. This makes daily asset management smoother and safer, minimizing losses caused by private key loss.
AokiApp NFT
Award homepage: https://ethglobal.com/showcase/aokiapp-nft-1t8k7
AokiApp NFT is a fully on-chain NFT collection that introduces a new image compression technology for NFTs, enabling image decompression and manipulation on the EVM.
Currently, most NFT projects rely on external servers (with some using IPFS) to store image files. If the server used for file storage encounters issues, the immutability and availability of the NFT itself will be affected. While projects like Cryptopunks have attempted to store uncompressed files directly on the blockchain, this often requires substantial gas consumption.
The uniqueness of AokiApp NFT lies in its development of a PCA-based image compression method and the application of linear algebra knowledge to create this fully on-chain NFT collection, where all file content is completely preserved on-chain after compression. The solution has the following main features: simplicity, achievable through short code that can be executed on the EVM; high compatibility with current mainstream pfp NFT models; the more NFTs issued, the higher the overall collection's compression rate.
Octoplorer
Award homepage: https://ethglobal.com/showcase/octoplorer-block-query-made-easy-pdgmt
Octoplorer is an AI-driven blockchain resource explorer that primarily aims to lower the technical barrier for users querying blockchain data. Through Octoplorer, users can input natural language to query various data on the blockchain and receive human-readable answers in formats such as tables, images, and graphs.
In terms of natural language query functionality, Octoplorer uses OpenAI's ChatGPT 3.5 "text-davinci-003" model, enhanced by the langchain library to further improve intelligence.
Currently, Octoplorer's services are available for Ethereum and Polygon.
Myna
Award homepage: https://ethglobal.com/showcase/myna-uxzdd
Myna is a wallet solution serving Japanese users, allowing them to use government-issued identification (My Number Card) as a hardware wallet, thereby achieving a simple and secure cryptocurrency custody solution.
Myna can generate EIP-4337 compliant contract wallets for each My Number Card, abstracting the wallet creation process for users and supporting features such as social recovery. This will enable Japanese residents to securely transfer wallet ownership in any emergency situation.
probablynothing.works
Award homepage: https://ethglobal.com/showcase/probablynothing-works-qgrrf
Probablynothing.works is a protocol that allows the Web3 community to earn revenue from advertisements. Advertising revenue has traditionally been an important avenue for revenue generation in online communities, but so far, for various reasons, the advertising business in the Web3 world has not developed effectively.
Probablynothing.works envisions bridging the gap in advertising services in the Web3 world. The protocol's designed system involves four types of roles: advertisers, advertisers spreading information, website visitors receiving information, and protocol operators providing infrastructure between publishers and advertisers. Probablynothing.works aims to utilize NFTs to connect supply and demand between publishers and advertisers, where one party provides information dissemination services and charges, while the other can choose dissemination channels and pay based on which communities they wish to spread their advertisements to.
AbswapX
Award homepage: https://ethglobal.com/showcase/abswapx-jmefw
AbswapX can be understood as an automated module enabling limit orders and reservation strategies for DeFi. Specifically, AbswapX creates an automated module for any contract wallet or EOA wallet to establish limit orders from any token on any source chain to another token on any target chain in the EVM.
The implementation path of AbswapX is as follows:
When users create a limit order, they specify the specific token pair, price relationship, and transaction quantity;
The limit order will then be added to the AbswapX order book. AbswapX will utilize Gelato Network to create proxy tasks with call data according to user specifications.
When the price reaches the user's specified target, Gelato Network automatically executes the transaction and swaps the user's tokens for the desired tokens at the specified price.
AbswapX is currently deployed on Gnosis Chain and Polygon Chain, and in terms of testnets, it has been deployed on Goerli, Mumbai, Polygon zkEVM, Linea, ScrollzK, Taiko, and Mantle.
Tanuki
Award homepage: https://ethglobal.com/showcase/tanuki-s8ew9
Tanuki is a trustless wallet activity scoring protocol that uses ZKP to read historical activities on-chain without trust, to calculate wallet scores.
Due to various needs (such as airdrop criteria), many protocols now require scoring wallets that have interacted before, but current scoring methods are mostly conducted off-chain, leading to issues of centralization, lack of transparency, and the need for additional trust. To address this issue, Tanuki chooses to utilize the ZK co-processor Axiom to read and aggregate historical data on-chain in a trustless manner, allowing each protocol to fairly and transparently calculate relevant metrics and promote trustless interactions.
Tanuki provides infrastructure-related code that can be seamlessly integrated into various protocols.
YORU
Award homepage: https://ethglobal.com/showcase/yoru-4si1p
YORU is a social payment tool with privacy protection features. This project sees two major challenges in current cryptocurrency social payments. First, anyone can track transaction history. On-chain transactions are transparent, and anyone can track a wallet's balance from the same address; second, the user experience on Web3 is poor, with complex and hard-to-remember addresses, and each transaction requires gas fees (especially when withdrawing a certain asset from a new address, which requires preparing ETH in advance). To solve these two major issues, YORU utilizes account abstraction and stealth addresses for token transfers.
In terms of privacy transmission, transactions conducted through YORU will send tokens to a one-time stealth address owned by the recipient, known only to the sender and recipient.
In terms of user experience, YORU supports public key registration through DID and ENS, allowing users to bind their wallet accounts with their social media accounts, such as Gmail, Twitter, Line, etc. Additionally, YORU utilizes the Paymaster in account abstraction to sponsor transactions, thus avoiding the issue of the recipient needing to pre-load ETH in a one-time stealth address (for gas when receiving assets).
SuperPlay
Award homepage: https://ethglobal.com/showcase/superplay-5zr28
SuperPlay is a user-friendly gaming platform with the following operational processes and features:
After users visit the game project website and register, SuperPlay automatically creates a contract wallet associated with their email address; within this wallet, users hold a small amount of ERC 20 tokens from the game project, granting them access to a gaming experience for a limited time (e.g., one week); during this time, users do not need to use any assets in their wallet, as the game project will cover the related gas fees; after the trial period, users can choose to cancel or subscribe to the game; when continuing the subscription, users can opt to pay for the game subscription using a credit card, which will be automatically deducted weekly from their contract wallet.
By providing a Web3 gaming trial experience that does not require purchasing assets (for subscribing to the game with ERC 20 tokens) and paying gas fees, SuperPlay significantly lowers the entry barrier for Web3.
POMPoarding
Award homepage: https://ethglobal.com/showcase/pompoarding-yis1w
POMPoarding provides a simple collaborative tool for Web3 communities.
POMPoarding allows community members to come together through simple Q&A without prior knowledge of cryptocurrency or wallets; in community management, POMPoarding offers a dashboard that allows community leaders to easily manage members; POMPoarding also utilizes Push Protocol and The Graph to manage messaging between communities; on the backend, POMPoarding uses SAFE to create a multi-signature wallet for governance, financial management, and other tasks.
