MetaCow DEX — Social DeFi Trading with Identity and Rewards

Overview

MetaCowDEX is a decentralized exchange that combines token swaps, liquidity provisioning, and social trading into a unified on-chain identity experience. Built for modern DeFi users, it enables trading, earning, following, and building a wallet-based reputation—all in one platform.

Live Demo: https://metacowdex.vercel.app
Backend API: Hosted on Render(it will take 50 sec to load ;) )
Blockchain: BNB Chain Testnet

Deploying with: 0xF8A440f0c3912F42dF794983B8164cB6572fCBCC

Pair logic deployed at: 0x1e792D4c34c3d04Bd127aFEf0c1696E912c755aa

Factory proxy deployed at: 0x2A07A0013877e3bcCDd42Da8171457B0B54EB54d

Problem Statement

Most decentralized exchanges are functional but lack identity, social interaction, and discoverability. DeFi traders remain anonymous, and there's no way to showcase reputation or learn from others. MetaCowDEX addresses this by introducing wallet-based identity, copy trading, and an interactive social feed to bring visibility and connection into DeFi.

What We Built

MetaCowDEX is more than a traditional DEX. It’s a social-finance platform designed to give users a voice, reputation, and identity based on their on-chain actions.

Core Features

Token Swapping: Swap any supported ERC-20 pair with estimated output preview
Liquidity Provision: Add/remove LP and claim earned swap fees
Copy Trading: One-click replication of top wallet swaps
Social Feed: Share trades, follow users, and build community insight
Reputation System: Score based on LP volume, swap activity, and social engagement
Faucet: Claim test tokens and auto-import to MetaMask

Integration Highlights

MetaMask SDK: Secure wallet connection and transaction signing
ERC-20 Support: Full compatibility on BNB Testnet
Upgradeable Contracts: Built using OpenZeppelin’s Transparent Proxy pattern

Real-World Use Cases

Use Case	Implementation
Wallet-linked identity	Profiles with bio, avatar, and transaction history
Token utility	Full ERC-20 swap and liquidity integration
Passive DeFi rewards	LP tokens earn swap fees, claimable on UI
Copy-trading	One-click replication from public wallet actions
Social discovery	Follow wallets, view feed, interact with posts

Architecture Overview

Frontend: React, TailwindCSS, Framer Motion, Ethers.js, MetaMask SDK
Backend: Node.js, Express, MongoDB, Alchemy SDK
Smart Contracts: Solidity, Hardhat, OpenZeppelin (Upgradeable Proxy)
DevOps: Vercel (frontend), Render (backend), GitHub Actions
Other Tools: Cloudinary (image upload), Draco (3D model compression)

Project Directory Structure

/backend → Express API with auth, swap, LP, profile logic /contracts → Hardhat project with Factory, Pair, ERC20 tokens /frontend → React app with routing, wallet context, UI pages

Security & Performance

MetaMask SDK ensures safe wallet interaction
Upgradeable smart contracts for long-term flexibility
Cloudinary and Draco for optimized asset loading
User-friendly toast messages and error handling

Design Choices

Real-time charts with auto-update on trades
Fully responsive mobile-first UI
On-chain social graph tied to wallets
Unique 3D MetaCow mascot on homepage

User Validation

We shared MetaCowDEX with a few DeFi users and builders. The Copy Trade feature was highly appreciated for making learning easy. Faucet integration and the automatic MetaMask import made onboarding smooth. Reputation scores were seen as a fun and competitive incentive to stay active.

Screenshots

Team

Dhruv Pancholi
Suhani Sharma

Conclusion

MetaCowDEX blends trading, identity, and social connection into one DeFi platform. It’s designed to make DeFi more transparent, human, and rewarding — helping users not only trade, but also grow, learn, and build their reputation on-chain.

Metacow U2U

Videos

Description