Re:Bet
Gasless prediction markets for research with Yellow SDK state channels
Demo
About
ResearchBet is a decentralized prediction market platform that combines on-chain verification with off-chain betting using Yellow SDK's state channels. It enables users to create markets around scientific research questions and place unlimited bets with zero gas fees. The Problem: Traditional prediction markets have high gas costs that make frequent betting economically unfeasible. Research institutions need a way to create low-cost markets for research outcomes while maintaining blockchain security. The Solution: By leveraging Yellow SDK's state channels (Nitrolite protocol), ResearchBet allows users to: - Create research prediction markets on-chain (one-time gas cost) - Place unlimited off-chain bets with instant settlements (zero gas) - Settle final outcomes on-chain for permanent record - Maintain full transparency and provability through blockchain verification Use Cases: - Pharmaceutical companies creating markets for clinical trial outcomes - Academic institutions betting on research publication success - Investors hedging on research project completion - Public markets for scientific consensus on controversial topics The platform uses a dual-contract architecture: `ResearchMarket.sol` for market creation and resolution, and `YellowSessionManager.sol` for off-chain session management. Users deposit USDC once, create a state channel session, place multiple bets without gas costs, and settle everything on-chain when the market resolves.
How it's made
Smart Contracts (Solidity): - `ResearchMarket.sol`: Core market logic with ERC7824-compatible interfaces for Yellow SDK integration. Handles market creation, bet placement, resolution, and winner claiming with automatic fee distribution. - `YellowSessionManager.sol`: Manages state channel sessions using Yellow's Nitrolite protocol (ERC7824 standard). Handles deposits, withdrawals, and off-chain bet settlements. Frontend (Next.js 16, React 19, TypeScript): - Server-side rendered pages for optimal performance - MetaMask integration for wallet connectivity - Real-time odds calculation and display - Form validation with TypeScript for type safety - Responsive UI using Radix UI components and Tailwind CSS State Channel Integration (Yellow SDK): - Integrated Yellow SDK's Nitrolite protocol for gasless betting - Session creation and management for off-chain interactions - Deposit/withdrawal mechanisms for channel management - Off-chain bet placement with on-chain settlement Development Stack: - Hardhat 3.x for smart contract compilation and testing - Ethers.js v6 for blockchain interactions - Hardhat EDR for local blockchain simulation - TypeScript for type-safe development Technical Highlights: 1. **Gasless Betting**: All individual bets happen off-chain via state channels, with only the initial deposit requiring gas. This reduces costs by 99%+ compared to traditional markets. 2. **Real-time Odds**: Dynamic odds calculation based on pool ratios, updated instantly as bets are placed. 3. **Automated Settlements**: Winners can claim their share of the pool plus their original bet, with automatic fee distribution to the platform. 4. **ERC7824 Compliance**: Full compatibility with Yellow's Nitrolite protocol for seamless state channel integration.