Ping Pong DeFi

Example of what the UI might look like

Inspiration

The idea for PingPong DeFi came from combining two things we enjoy: ping pong and the potential of decentralized technologies. We noticed that many amateur tournaments lack transparency, consistent result tracking, and fair reward systems. We saw an opportunity to use blockchain and DeFi to solve these problems in a fun and accessible way. That’s how the concept of building a platform where players can record matches, improve their ranking, and participate in a fair and automated reward system was born.

What it does

PingPong DeFi will be a decentralized ping pong ranking platform based on the ELO system, where players can register their match results and eventually join tournaments with crypto rewards. The idea is for entry fees to be deposited into the Compound protocol, where they will generate interest that is distributed among the winners. The project is currently under development — we are designing the platform’s structure, implementing the ranking logic, and learning how to integrate Compound into the system.

How we built it

Right now, we’re focused on designing the base logic for the ranking system and learning how to use tools like Solidity, Hardhat, and the Compound.js SDK. The frontend will be built in React, and the smart contracts will handle match submissions and the flow of funds for tournament entries and payouts. Compound integration is not yet implemented, but we’re actively studying how it works and planning how to incorporate it properly into our app’s flow.

Challenges we ran into

One of the main challenges has been starting from zero in the world of DeFi — especially learning how Compound works, with concepts like cTokens and interest accrual. We’re also learning how to structure secure and efficient smart contracts while keeping the user experience simple. Balancing all of this learning with actually building the app has been difficult, but also highly rewarding.

Accomplishments that we're proud of

Even though the project is still in an early stage, we’ve made solid progress in defining its structure, goals, and value. We’re proud of having committed to learning DeFi seriously and of starting a project that aims to make real-world impact using Web3 technologies. We’ve already advanced in designing the ranking system, understanding how Compound operates, and laying out a technical roadmap for the product.

What we learned

We’re learning how DeFi protocols work from scratch, including how to connect smart contracts to a frontend, and how to manage funds securely in a decentralized context. In particular, we’ve been diving into the Compound protocol — how cTokens work, how to interact with the protocol, and how to automate the process of earning and distributing interest. We’re also improving our skills in collaborative development, agile planning, and technical documentation.

What's next for Ping Pong DeFi

In the coming weeks, we plan to build a basic MVP where users can register a match, calculate rankings, and simulate the entry fee and reward flow using Compound on a testnet. After that, we’d like to add referee validation for results, and eventually explore technologies like ZK-proofs to make the system more secure and scalable. We’re also considering expanding to other casual sports or games. Our ultimate goal is to build a fair, fun, and transparent platform that connects the physical world of sports with the possibilities of the Web3 ecosystem.