Prism Finance
DAO-powered SME lending with social backing reduces collateral from 100% to 20%
Demo
About
Prism Finance revolutionizes SME lending by combining social trust with partial collateral through a decentralized autonomous organization (DAO). Our protocol solves the critical problem of over-collateralization that prevents small businesses from accessing capital. The Problem: Traditional DeFi lending requires 100%+ collateral, making it impossible for SMEs to access capital. Banks have lengthy approval processes and high barriers to entry. Our Solution: A member-based DAO where existing members vouch for borrowers through social backing, dynamically reducing collateral requirements from 100% to just 20% based on community support. Dynamic Collateral Formula: 0 backers = 100% collateral required 5 backers = 60% collateral (100% - 5×8%) 10+ backers = 20% collateral (minimum floor) Two Participation Modes exist in our system, which are: Active Lending: Members stake governance tokens to back loans, earning higher returns but sharing default risk Yielding Mode: Passive investment in DeFi protocols (Aave/Compound) for steady 3-7% APY with minimal risk We have a built-in risk management: Insurance pool covers 30% of default losses Reputation system tracks member backing success rates Slashing mechanism penalizes chronic bad backers Soul-bound NFTs prevent reputation trading Real Impact Prism wants to bring is: SMEs can now access capital with just 20% collateral when backed by 10+ community members, unlocking billions in previously inaccessible capital for small businesses worldwide.
How it's made
Smart Contract Architecture (Solidity 0.8.20): GovernanceToken: ERC20 with staking, voting power, and slashing mechanisms ReputationNFT: Soul-bound ERC721 tracking backing success rates (0-1000 score) DAOMembership: 2/3 majority voting for new member admission LoanVoting: Core contract managing social backing and dynamic collateral calculation YieldingPool: Vault pattern for passive DeFi yield farming InsurancePool: Risk mitigation covering 30% of default losses LendingPool: Core liquidity management with proportional interest distribution. Frontend Stack (React + Vite): Wagmi + RainbowKit: Web3 wallet integration and contract interactions Framer Motion: Smooth animations and micro-interactions Tailwind CSS: Modern, responsive design system Recharts: Real-time protocol metrics and analytics dashboard React Router: Multi-page application with seamless navigation Deployment & Security: Sepolia Testnet: Fully deployed and tested contract suite OpenZeppelin: Battle-tested security patterns and access controls ReentrancyGuard: Protection against reentrancy attacks SafeERC20: Secure token transfer implementations Key Technical Achievements: Gas-optimized: Efficient storage patterns and batch operations Modular design: Each contract handles specific functionality Upgradeable: Owner-controlled parameter updates Comprehensive testing: Unit and integration test coverage Integration Highlights: DeFi composability: Ready for Aave/Compound yield strategies Cross-chain ready: Architecture supports multi-chain deployment Oracle integration: Credit score verification system Governance delegation: Vote delegation for inactive members Notable Hacks: Dynamic collateral algorithm: Mathematical formula reducing risk through social proof Reputation-weighted governance: Voting power based on backing success history Insurance mechanism: Automated loss distribution with coverage limits Soul-bound reputation: Non-transferable NFTs preventing Sybil attacks