Todo Arena

Inspiration

When I saw kids in this generation only playing video games, which often makes them lonely, I felt inspired to create TodosArena. My goal was to build a platform where they can play any type of game together—whether it's physical sports like basketball or digital e-sports—fostering connection and community. I wanted to use technology not to isolate, but to bring people together through shared competitive experiences.

What it does

TodosArena is a decentralized platform that gamifies both physical and digital activities. It allows users to create matches, stake tokens, and compete in various games. Winners are verified using Gemini AI, which analyzes camera feeds or screenshots, and the community can vote to ensure fairness. It bridges the gap between real-world activities and on-chain rewards.

How we built it

We built TodosArena using a modern React frontend with TailwindCSS for a sleek, responsive design. For the blockchain layer, we wrote Solidity smart contracts and deployed them across multiple EVM chains (Sepolia, Arbitrum, Base, etc.) using a custom Relayer architecture. This ensures users across different networks can participate seamlessly. We integrated Google's Gemini AI to act as an intelligent oracle, processing image data to determine match outcomes accurately.

Challenges we ran into

Integrating real-world verification with blockchain was a significant challenge. We had to carefully tune the AI prompts to accurately detect winners from various image angles and lighting conditions. Additionally, handling cross-chain state synchronization—ensuring that a user staking on Arbitrum is correctly registered for a match on Sepolia—required designing a robust event-driven backend listener and Relayer system.

Accomplishments that we're proud of

We are proud of successfully creating a verification system that can judge interactions in both the physical and digital worlds. Deploying our contracts to over 10 testnets and managing the architecture to support them all was a major technical feat. We also successfully implemented a User Registration system that rewards new players with tokens, lowering the barrier to entry.

What we learned

We learned the immense potential of combining AI Agents with Web3. AI effectively solves the specific "Oracle Problem" of verifying unstructured real-world data (like a photo of a chessboard). We also gained deep insights into account abstraction concepts by building our Relayer system, which simplifies the crypto experience for end-users.

What's next for TodosArena

We plan to expand the AI's capability to analyze video feeds in real-time for more complex sports. We also aim to integrate a DAO structure so the community can vote on platform parameters. Developing a native mobile app is also on the roadmap to make capturing "proof of win" even easier for outdoor sports.

Built With

• css3
• ethers.js
• evm
• html5
• javascript
• solidity
• wagmi