ReviewSync

Problem Statement

ReviewSync allows you to import your ratings from different platforms (e.g. Uber, Lyft, Airbnb, Facebook Marketplace) and import them onto the blockchain. If you join a new platform (e.g. Cabify, Didi), they can see the ratings linked to your wallet address so you can be assigned a rating based on your average rating, # of ratings, # of verified platforms, and age of accounts instead of starting from 0.

Solution

Built the frontend with Next.js using the Scaffold-ETH template for fast wallet + contract integration.Wrote and deployed smart contracts with Hardhat on the Flare testnet to store cross-platform rating data and generate token rewards using Flare RNG.Integrated World ID to verify each user is a unique human, preventing duplicate or fake ReviewSync identities.Used Filecoin to store rating-verification evidence (screenshots, proofs) in a decentralized, tamper-resistant way.Used Google Gemini 2.5 Flash to analyze uploaded rating screenshots and extract structured review details automatically.