LimitCraft

Demo

About

⛓️ **The Problem**: Traditional limit orders rid lenders and traders of yield-earning opportunities by forcing them to wait for price targets. Capital sits idle, creating opportunity cost. 🚀 **Our Solution**: LimitCraft revolutionizes limit orders by integrating lending protocols directly into the order execution flow and also offers TWAP. ### Key Innovations: 🪙 **Auto Asset Unwrap** - Automatically withdraw maker tokens from AAVE just before your limit order fills - No idle capital - your assets earn yield while orders are pending ⚡ **Instant Yield Deployment** - Received tokens are instantly deposited into lending markets right after order execution - Seamless transition from one yield-earning position to another at a favorable trade rate 📊 **TWAP Execution** - Fill large orders gradually over customizable time intervals - Reduces market impact while maintaining capital efficiency - Each sub-order maintains the lending integration 🔐 **Gasless Experience** - Permit2 integration eliminates repeated approval transactions - Sign once, trade efficiently across multiple orders ### Technical Advantages: - **Non-custodial**: Built entirely on 1inch Limit Order Protocol extensions - **Gas Optimized**: Batched interactions reduce transaction costs - **Mobile Responsive**: Modern React UI with real-time order tracking

How it's made

LimitCraft pushes the 1inch Limit Order Protocol to its limits, implementing sophisticated capital efficiency features through smart contract extensions: ### 🏗️ Smart Contract Architecture **Core Extensions** (Solidity + Foundry): - `InteractionManager.sol` - Orchestrates lending protocol interactions - `TwapCalculator.sol` - Handles time-weighted order calculations - Custom extension system integrating AAVE V3 lending pools ### 🔄 Advanced Order Mechanics **PreInteraction** - Executed before order fills: - Detects if maker asset is in AAVE lending position - Automatically withdraws exact amount needed for the trade - Supports both regular and TWAP order types **PostInteraction** - Executed after order fills: - Instantly supplies received tokens to AAVE lending pools - Maintains capital efficiency throughout the trade lifecycle **TWAP Implementation**: - Uses `getMakingAmount()` and `getTakingAmount()` callbacks - Custom time-based calculation with Chainlink price feeds - Supports 1-168 hour execution windows with configurable intervals ### ⚡ Frontend Innovation **Modern React Stack**: - TypeScript + Vite for fast development - Wagmi v2 + RainbowKit for Web3 integration - shadcn/ui components for polished UX - Real-time order status tracking with WebSocket connections **1inch API Integration**: - Balance API for live wallet data - Token API for metadata resolution - Price API for market rate calculations - Permit2 signatures for gasless approvals ### 🛠️ Backend Infrastructure **High-Performance Stack**: - **Bun + Elysia.js** - Ultra-fast TypeScript runtime (3x faster than Node.js) - **PostgreSQL + Drizzle ORM** - Type-safe database operations - **Automated Resolver Service** - Monitors and executes orders using 1inch APIs **System Components**: ``` ├── contracts/ - Solidity extensions + Foundry tests ├── api/ - REST API with order management ├── db/ - Database schema + migrations ├── resolver/ - Background order execution service └── ui/ - React frontend with Web3 integration ``` ### 🔐 Security & UX Features - **EIP-712 Signatures** - Industry standard order signing - **Permit2 Integration** - Eliminates repeated approvals (gas savings ~60%) - **Mobile Responsive** - Works seamlessly across all devices ### 🎯 Hackathon Achievements - **First-ever** limit order platform with integrated lending yield - **Sub-second** order matching and execution - **Production-ready** architecture with horizontal scaling support - **Intuitive UX** - Complex DeFi interactions simplified into one-click actions