LinkInch

A social trading platform where users connect their wallets to share, discover, and act on real-time DeFi insights. Traders post alpha, price predictions, or memes, and others can instantly swap tokens via 1inch directly from those posts. The platform tracks performance, rewards profitable signals, and builds social graphs around wallet activity and on-chain credibility. Users can follow top performers, copy trades, earn badges, and engage in prediction or meme markets — turning DeFi into a social, gamified loop where trading becomes collaborative, not just competitive.

We built the platform using Next.js for the frontend with TailwindCSS for a clean, responsive UI, and Wagmi + RainbowKit to handle wallet connections across multiple EVM chains. For the backend, we used Node.js and The Graph to index user trading activity and social interactions. Trading is powered by the 1inch Aggregation API, enabling users to execute swaps directly from posts — creating a seamless “signal-to-execution” flow. We integrated Airstack to build rich user profiles by querying cross-chain wallet activity, follower overlap, and token ownership. For social features and messaging, we used XMTP and Lens Protocol, allowing users to post, follow, and DM within a fully Web3-native environment.

A particularly hacky part was building a copy trading module: we track a user's wallet and mirror their trades in near real-time for followers who've opted in, using smart contract hooks and event listeners. We also used Chainlink Functions to resolve prediction markets by fetching external data (e.g., token price at expiry) and automatically scoring user-submitted calls.

All components are stitched together with a strong emphasis on on-chain verifiability, user reputation, and composable social loops — blending DeFi and social engagement in a unified experience.