This hackathon focused on four core tracks: PayFi, Social, AI & AI Agent, and AI Infra, centered around the theme of "Building a Compliant and Secure Web3 Financial Ecosystem."

From March 28 to 30, 2025, the "Taiyi" hackathon, hosted by HashKey Chain and specially sponsored by OKX Wallet and INFINI, successfully concluded in Seoul, South Korea. As the second stop of the "HashKey Hackerhouse" series, this three-day developer conference attracted over 110 top developers, innovators, and Web3 enthusiasts from around the world, with HashKey Eco Labs CEO Kay also attending the event. A total of 11 technical projects were submitted, and ultimately, 9 teams stood out with their groundbreaking solutions, winning track awards.

This hackathon focused on four core tracks: PayFi, Social, AI & AI Agent, and AI Infra, centered around the theme of "Building a Compliant and Secure Web3 Financial Ecosystem." The design of the competition, which deeply integrates financial compliance, social dynamics, artificial intelligence, and infrastructure, not only showcases the foresight of technology but also highlights HashKey Chain's precise observation of industry pain points.

Track Decoding: The Ecological Ambitions Behind Four Propositions

1. PayFi: Next-Generation Financial Protocol Innovation

As the core engine connecting traditional finance and the Web3 ecosystem, the PayFi track focuses on three breakthrough directions: the development of instant payment protocols based on cross-chain technology, AI-driven quantitative strategy optimization, and the construction of decentralized identity credit systems. Participating teams are required to explore the deep integration of real-world asset flows, information flows, and on-chain value networks within the compliance framework of HashKey Chain.

2. Social: Reshaping the Attention Economy

For any public chain ecosystem to achieve large-scale application deployment, social scenarios are an indispensable infrastructure. Participating projects need to deeply integrate on-chain identities and social relationship graphs, designing incentive models that convert user attention into quantifiable returns, creating a new paradigm for value capture and distribution for millions of users.

3. AI & AI Agent: Opening a Seamless Era of Intelligent Interaction

AI & AI Agent requires developers to create on-chain intelligent agents with autonomous decision-making capabilities. Participating works can include personalized wealth management advisors, smart contract code auditing and vulnerability monitoring systems, automated workflow engines for cross-DApp operations, and on-chain data intelligence analysis and visualization tools, all aimed at lowering the barriers to using Web3 through deep learning and automation frameworks.

4. AI Infra: Forging Developers' Digital Toolbox

As the underlying support for ecological prosperity, the AI Infra track focuses on soliciting infrastructure that enhances development efficiency, including development kits that achieve deep integration of HashKey with AI frameworks like LangChain/MCP, high-performance data availability layers for AI training, automated testing and deployment toolchains for smart contracts, and visual DApp building platforms with low-code components, providing full lifecycle support for ecological developers.

Award-Winning Projects Showcase: Technological Breakthroughs and Ecological Value

After intense competition and multiple rounds of evaluation, outstanding projects from various tracks emerged, showcasing the participants' exceptional capabilities in technological innovation and commercial application. Below is a detailed introduction to the award-winning projects from each track:

1. PayFi Track

—— Champion: OSY Optimized Stable Yield

Project Introduction: OSY is a stablecoin yield aggregator that redefines stablecoin investment through automated yield optimization, achieving seamless operations across all DeFi protocols and blockchains. Users can easily deposit stablecoins through a personalized smart wallet and immediately receive interest-bearing stablecoins, osyUSD, representing their dynamically managed investments.

GitHub Link: https://tinyurl.com/y3nvytyk

—— Runner-Up: Portal Trade

Project Introduction: Portal Trade is a decentralized lending and arbitrage trading protocol built on blockchain technology. Leveraging a smart contract architecture, Portal Trade provides a secure and efficient system where users can authorize their earnings to be managed by arbitrage bots, thus gaining more returns.

GitHub Link: https://tinyurl.com/2t2cfwpa

2. Social Track

—— Champion: Cookey

Project Introduction: Cookey is a Q&A competition application built on HashKey Chain. It combines blockchain technology with entertainment interaction, providing users with a new learning and entertainment experience.

GitHub Link: https://tinyurl.com/53a9f7pk

3. AI & AI Agent Track

—— Champion: ChatPulse

Project Introduction: This is a Telegram bot that automatically analyzes and records user behavior scores in group chats. It utilizes large language model technology to analyze message context and score based on user behavior. The collected data is encrypted and recorded on the HashKey blockchain every hour, ensuring transparency and credibility.

GitHub Link: https://tinyurl.com/24cj8599

—— Runner-Up: Haifu

Project Introduction: A virtual idol issuance platform that combines DeFi and AI (DeFAI), allowing users to create personalized digital characters by training AI models and tokenizing them as NFTs. The project achieves deep integration of AI-generated content (AIGC) and on-chain IP copyright management.

GitHub Link: https://tinyurl.com/3wsx93cd

4. AI Infra Track

—— Honorable Mention: HashScope

Project Introduction: HashScope is an API platform built on HashKey Chain, aimed at connecting real-world data with blockchain technology and rewarding data contributors with HSK tokens. HashScope provides high-quality, real-time data through standardized APIs while integrating the Model Context Protocol (MCP), enabling AI agents to easily access this data.

GitHub Link: https://tinyurl.com/uzurjb5t

5. Student Awards (No Particular Order)

—— Battle Beatle

● Project Introduction: A prediction market platform inspired by Polymarket, where users can predict event outcomes by analyzing real-time data, participating in market discussions, and formulating strategies, earning rewards based on market performance.

—— Key-Bot

● Project Introduction: Key-Bot simplifies the user onboarding process for HashKey Chain by directly integrating wallet creation, cross-chain asset management, trading, and portfolio management functions within Telegram, significantly reducing operational complexity and entry barriers, allowing new users to quickly get started without cumbersome operations.

● GitHub Link: https://tinyurl.com/32matepv

—— Invoice Pay

● Project Introduction: Invoice Pay transforms invoices into NFTs, facilitating the conversion of real-world assets into digital assets, which not only enhances capital turnover efficiency but also ensures transaction transparency and security, providing more flexible and convenient financing solutions for both borrowers and lenders.

● GitHub Link: https://tinyurl.com/4cwrjv2v

Anchored in Compliance, Advancing Globally

HashKey Chain has always valued the Asian market and actively provides resource support for developers. Whether through hackathons, grant programs, or the upcoming accelerator projects, HashKey Chain is creating a more developer-friendly environment, helping them innovate on-chain and expand into international markets.

Currently, HashKey Chain is attracting increasing attention from developers, who are optimistic about its compliant and robust development path, as well as its deep layout in the Asian market. Many teams have already deployed applications on-chain, exploring more possibilities by leveraging its high performance and security advantages.

The "HashKey Hackerhouse" series will continue to advance, with three more hackathons scheduled this year in addition to "Taiyi," aiming to attract more developers to join its ecosystem. Stay tuned!

About HashKey Chain

HashKey Chain is the preferred public chain for financial institutions and RWA asset tokenization, dedicated to promoting the compliance and scalability of Onchain Finance. As a compliance-friendly blockchain infrastructure, HashKey Chain provides a secure and transparent on-chain environment for institutions.

With a secure and trustworthy technical architecture, HashKey Chain inherits the decentralized security of Ethereum and enhances transaction efficiency through high-performance optimization, ensuring the stability and traceability of on-chain assets. Additionally, HashKey Chain adopts high-performance, low-cost solutions, offering extremely low gas fees and high throughput, enabling efficient circulation of financial assets such as MMF, bonds, funds, and stablecoins, thereby reducing operational costs for institutions on the blockchain.

HashKey Chain is collaborating deeply with leading global financial institutions and compliant Web3 projects to provide optimal solutions for institutional DeFi, RWA tokenization, stablecoin settlement, and other application scenarios, accelerating the digital and intelligent upgrade of the financial system.

HashKey Chain Official Website: https://hsk.xyz/

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