Kick off ETHSF with a bang! We’ll introduce this year’s problem statements, meet our sponsors and mentors, and set the stage for an incredible week of building.

Opening Ceremony & Kickoff

Our panel will review all projects selecting the top projects based on creativity, real-world impact, execution, and presentation who will then get to demo on the final day. Sponsors will also award special prizes to standout projects. No complicated rules, just great ideas, strong builds, and clear storytelling.

P.S. - The top projects will be chosen solely on the basis of your Devfolio submission. So please make your submission as strong as possible! Use demo videos, screenshots, and well-written descriptions to your advantage, **and please make sure your submitted code repos are not private.**

Judging

This is where everything comes to life! Teams will showcase their projects to the ETHSF community, judges, and sponsors. You’ll get to explore game-changing ideas, meet the builders, and celebrate the hard work that went into them.

Demo Day & Closing Ceremony

Event

Ethereum

Co-Founder

Vitalik Buterin

Nethermind

Founder

Tomasz Stanczak

Coinbase

Developer Platform Lead

Nemil Dalal

Base

Head of Product

Thomas Vieira

Devfolio

Denver Dsouza

Ethereum Ecosystem Fund

Partner

Blockchain Builders Fund

Kun Peng

Yaniv Tal

Caldera

Matt Katz

Nexus Labs

Daniel Marin

Etherealize

Grant Hummer

Celo

Marek Olszewski

Eigen Foundation

Executive Director

Robert Drost

Electric Capital

General Partner & Co-Founder

Avichal Garg

Pantera

General Partner

Franklin Bi

Managing Partner

Gavin Wang

ZKEmail

Ayush Gupta

OKcontract

Henri Binsztok

ETHSF Hackathon 2025



**💰 Prize Amount**
$4000


**🥇 Number of Projects Awarded**
1


**🏆 Winner Breakdown**
1st place $2500
2nd place $1000
3rd place $500

📚 Read more about the bounty [here](https://docs.google.com/document/d/1Rk0ewNMVO68LMvIev5TrrGIR2irTCNlN4a7P4DWdTDs/edit?tab=t.0#heading=h.qy9bq3cng3n9).


Integrate Self into your application to verify your users' age, nationality or sanction list status

Self Protocol by Celo

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



Build a new and innovative consumer experience on Base

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).

Innovative ways to leverage Reactive Smart Contracts (RSCs)

Reactive Network

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**
$3000
(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).

Incorporate Reactive Smart Contracts (RSCs) in your applications

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).

Build a Universal Prediction Market for d/acc Applications

ZetaChain

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


Build a Universal App

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)


Most Innovative Use of AgentKit

Coinbase Developer Platform

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.

ETHSF Hackathon 2025

ETHSF Hackathon 2025

ETHSF Hackathon 20256 ETH

Coinbase Developer Platform$5,000

Base$5,000

Reactive Network$10,000

ZetaChain$5,000

Self Protocol by Celo$4,000

ETHSF Hackathon 2025

3 ETH (Open): 🗳️ Builder’s Choice: Quadratic Voting Pool

3 ETH: Main Track

Coinbase Developer Platform

$5,000: Most Innovative Use of AgentKit

Base

$5,000: Build a new and innovative consumer experience on Base

Reactive Network

$7,000: Innovative ways to leverage Reactive Smart Contracts (RSCs)

$3,000: Incorporate Reactive Smart Contracts (RSCs) in your applications

ZetaChain

$2,500: Build a Universal Prediction Market for d/acc Applications

$2,500: Build a Universal App

Self Protocol by Celo

$4,000: Integrate Self into your application to verify your users' age, nationality or sanction list status

ETHSF Hackathon 20256 ETH

Coinbase Developer Platform$5,000

Base$5,000

Reactive Network$10,000

ZetaChain$5,000

Self Protocol by Celo$4,000

ETHSF Hackathon 2025

3 ETH (Open): 🗳️ Builder’s Choice: Quadratic Voting Pool

3 ETH: Main Track

Coinbase Developer Platform

$5,000: Most Innovative Use of AgentKit

Base

$5,000: Build a new and innovative consumer experience on Base

Reactive Network

$7,000: Innovative ways to leverage Reactive Smart Contracts (RSCs)

$3,000: Incorporate Reactive Smart Contracts (RSCs) in your applications

ZetaChain

$2,500: Build a Universal Prediction Market for d/acc Applications

$2,500: Build a Universal App

Self Protocol by Celo

$4,000: Integrate Self into your application to verify your users' age, nationality or sanction list status