Reputa

Demo

About

**Problem** DeFi protocols **lack reliable reputation data**, preventing them from offering trustless personalized terms to anonymous users. DeFi users **lose their blockchain activity data** when moving between blockchains. Meanwhile, **current credit scoring is expensive** (high gas fees for on-chain computation) **and limited** (centralized, backward-looking frameworks). **Solution** A **cross-chain reputation bridge** that: - Analyzes complete DeFi history from EVM chains - Generates AI-powered credit scores (0-1000) off-chain in a secure environment - Records verified scores on Sui blockchain via oracle - Enables protocols to offer personalized terms based on proven track record **Innovation** 1. **Portable Reputation:** Users carry their hard-earned track record across chains instead of restarting 2. **Predictive AI Scoring:** LLM-based analysis identifies patterns predictive of future behavior, not just historical metrics 3. **Multi-Dimensional Framework**: Evaluates: activity history, account maturity, portfolio diversity, risk behavior, user intent. 4. **Off-Chain Efficiency**: Reduces gas costs, protects privacy, enables complex analysis impossible on-chain 5. **Verifiable Result**: Computation runs in a TEE, producing cryptographic proof of correct execution that can be verified on-chain without repeating the calculation. **Scoring Framework** - Credit performance (borrow/repay patterns, liquidations) - Balance sheet health (net asset value, volatility, concentration) - Risk indicators (capital looping, liquidity buffers) - Cash flow capacity (debt coverage ratios, stress scenarios)

How it's made

**Frontend** Built with React, Tailwind, Vite, Sui dApp Kit. **Oracle** - **Blockchain:** Sui (score recording, DeFi integration) - **Smart Contracts:** Sui Move - **TEE:** Sui Nautilus via Marlin Oyster CVM on AWS Nitro Enclaves - **Cryptography:** @noble/secp256k1 + @noble/hashes (SHA256) - **LLM:** Ollama Llama3.2:1b **Data Aggregator** - **Blochchain:** Ethereum/EVM (data source) - **Framework:** Python + FastAPI + Uvicorn (Python ASGI) - **APIs:** Alchemy, EtherScan, OpenSea - **Reputation Signals:** POAPs, ENS, verified/blue-chip NFTs, clean lending history. - **Risk Signals:**: Tornado Cash, span NFTs, drainer patterns, high portfolio concentration. - **Protocol Coverage:** Aave V2/V3, Compound V2/V3, Uniswap V2/V3, Curve Finance, Ethena (USDe, deUSD), Lido (stETH).