ETHSF Hackathon 2025

Create a universal prediction market that: ✅ Works across multiple blockchains using ZetaChain’s interoperability. ✅ Allows users to bet in different assets (ETH, USDC, ZETA, etc.) without needing to bridge manually. ✅ Supports Sybil resistance via economic mechanisms (staking, identity reputation, or quadratic betting). ✅ Focuses on d/acc topics, such as: - Pandemic risk forecasts (early detection based on wastewater monitoring, air quality sensors). - AI safety risk assessments (e.g., time to AGI, likelihood of AI disempowerment scenarios). - Cyber threats (e.g., probability of a major cloud provider outage, large-scale hacks). - Misinformation and info defense (e.g., evaluating claims made by public figures). **Prize Distribution:** First Prize: $4000 to be divided among two teams equally ($2000 each) Second Prize: $1000 to be awarded to the winner

We’re looking for fully built universal dApps that demonstrate: ✅ Cross-chain functionality – Your app should seamlessly interact with multiple blockchains. ✅ Practical use case – The app should solve a real problem or improve an existing experience. ✅ User-friendly design – Prioritize a clean, intuitive UX that abstracts complexity. ✅ AI integration (optional, but a bonus) – AI-powered functionalities are encouraged! Example Use Cases: - Cross-chain swap or lending platform - NFT marketplace supporting assets from multiple chains - Bitcoin-enabled smart contract dApp - AI-powered cross-chain analytics tool - Decentralized identity verification across different chains

In this track, we're looking for innovative ways to leverage Reactive Smart Contracts (RSCs). The focus is on creativity, business impact (e.g., cost savings, revenue generation, or enhanced user experience), and implementation complexity. We welcome both improvements to existing dApps and DeFi workflows, as well as entirely new dApps. **💰 Prize Amount** $7000 **🥇 Number of Projects Awarded** 3 **🏆 Winner Breakdown** 1st place $4000 2nd place $2000 3rd place $1000 (Note: Prizes will be distributed in ETH) **📝 Judging Criteria** A successful application **MUST**: - Utilize Reactive Smart Contracts in a meaningful way. Simply deploying standard Solidity contracts on the Reactive Network is not enough. Your solution **MUST** incorporate reactivity—RSCs should respond to EVM events and trigger transactions accordingly. - Contain the Reactive Smart Contracts and Destination smart contracts, the deploy script, and the instructions for it. - If the application uses its own Origin contracts, the repository **MUST** also include these contracts, along with their deploy scripts and instructions. - It **MUST** contain the address of the Reactive Smart Contracts deployed by the team. - It **MUST** contain the addresses of the Origins and Destination smart contracts. - It **MUST** contain a detailed explanation of the problem Reactive Smart Contracts solve in that use case and why it is more difficult or even impossible to solve it without them. - It **MUST** contain the step-by-step text description of how this setup works after being deployed. - The team **MUST** run this workflow. The application **MUST** include the transaction hashes for every step of the workflow, for Origin transactions, Reactive transactions, and Destination transactions. - The application **MUST** contain a presentation video not longer than 5 minutes. The video might contain slides, narration, app or code demonstration, depending on what the team finds more persuasive. The judges from the Reactive team will watch the video, as well as read the code and the docs. ## Evaluation Criteria The applications will be evaluated based on the following criteria: - Whether Reactive Smart Contracts in this use case solve an important problem that could not be solved or could be solved less optimally without them. - How clearly the use case is explained and justified. - Code quality, security, readability. Read more about the bounty [here](https://docs.google.com/document/d/1P4s0cQb_H-miYT7WnMyu5otk4pgofi6c0bn1chbKzy0/edit?tab=t.0#heading=h.iwws74n8mxka).

In this track, we encourage hackers to incorporate Reactive Smart Contracts (RSCs) in their applications in any meaningful way. Even the simplest implementations will be eligible for a prize, as long as they meet the judging criteria and solve a problem or add value to your application. **💰 Prize Amount** $400 (Note: Prizes will be distributed in ETH) **📝 Judging Criteria** A successful application **MUST**: - Utilize Reactive Smart Contracts in a meaningful way. Simply deploying standard Solidity contracts on the Reactive Network is not enough. Your solution **MUST** incorporate reactivity—RSCs should respond to EVM events and trigger transactions accordingly. - Contain the Reactive Smart Contracts and Destination smart contracts, the deploy script, and the instructions for it. - If the application uses its own Origin contracts, the repository **MUST** also include these contracts, along with their deploy scripts and instructions. - It **MUST** contain the address of the Reactive Smart Contracts deployed by the team. - It **MUST** contain the addresses of the Origins and Destination smart contracts. - It **MUST** contain a detailed explanation of the problem Reactive Smart Contracts solve in that use case and why it is more difficult or even impossible to solve it without them. - It **MUST** contain the step-by-step text description of how this setup works after being deployed. - The team **MUST** run this workflow. The application **MUST** include the transaction hashes for every step of the workflow, for Origin transactions, Reactive transactions, and Destination transactions. - The application **MUST** contain a presentation video not longer than 5 minutes. The video might contain slides, narration, app or code demonstration, depending on what the team finds more persuasive. The judges from the Reactive team will watch the video, as well as read the code and the docs. ## Evaluation Criteria The applications will be evaluated based on the following criteria: - Whether Reactive Smart Contracts in this use case solve an important problem that could not be solved or could be solved less optimally without them. - How clearly the use case is explained and justified. - Code quality, security, readability. Read more about the bounty [here](https://docs.google.com/document/d/1P4s0cQb_H-miYT7WnMyu5otk4pgofi6c0bn1chbKzy0/edit?tab=t.0#heading=h.iwws74n8mxka).

Build a new and innovative consumer experience on Base using at least one of the following: OnchainKit, AgentKit, or Smart Wallet. **💰 Prize Amount** $5000 **🏆 Winner Breakdown** 1st place $2500 2nd place $1500 3rd place $1000

The era of Autonomous Onchain Intelligence is here. Use AgentKit to create an agent with access to crypto to do something incredible. AgentKit is best fit for a few use cases: - Facilitating the agentic commerce revolution by allowing developers to seamlessly plug in fast & free payment and data transfer rails to their agents. - Creating the best crypto user experience by using LLMs to entirely abstract away all the complexities of crypto behind a natural language interface, creating a new distribution and interaction paradigm for protocols. - Crazy experiments that push the boundaries of what autonomous agents can do by allowing them to run on decentralized resilient infrastructure, pay for their hosting and inference, and have unguarded access to financial rails. What you build doesn’t have to be useful; we want to see some of the coolest ideas you have come to life with agents. Even more bonus points for creating a Replit Template, push a PR to our repo, or create composable building blocks that other devs can use in their implementation! --- ## Resources For Builders: - **Developer Support in CDP Discord** - [https://discord.com/channels/1220414409550336183/1347832662081015912](https://discord.com/channels/1220414409550336183/1347832662081015912) - **AgentKit Docs** - [https://docs.cdp.coinbase.com/agentkit/docs/welcome](https://docs.cdp.coinbase.com/agentkit/docs/welcome)

**💰 Prize Amount** $4000 **🥇 Number of Projects Awarded** 1 **🏆 Winner Breakdown** 1st place $2500 2nd place $1000 3rd place $1000 to be divided among 2 winners. ($500 each) 📚 Read more about the bounty [here](https://docs.google.com/document/d/1Rk0ewNMVO68LMvIev5TrrGIR2irTCNlN4a7P4DWdTDs/edit?tab=t.0#heading=h.qy9bq3cng3n9).

We’re awarding 1 ETH per team to the top project in the following tracks: - Best Infra - Best Dapp - Best d/acc Build something great. Take ETH home.

The community will vote using Quadratic Voting to decide how 3 ETH gets distributed across all submitted projects. Build something others love? You’ll get rewarded.