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Universal Router

Overview

Smart contracts for Uniswap's Universal Router - a flexible, modular routing contract that enables complex multi-hop swaps across Uniswap V2, V3, and V4 protocols. Built with Solidity using Hardhat and Foundry.

Scripts

  • npm run compile - Compile contracts with Hardhat and Forge
  • npm run test:hardhat - Run Hardhat integration tests
  • npm run test:gas - Run gas benchmarking tests with snapshots
  • npm run test:all - Run all tests (Hardhat + Foundry)
  • npm run lint - Format TypeScript and Solidity files
  • npm run lint:check - Check formatting without changes
  • npm run prettier:fix - Format TypeScript and JSON files

Dependencies

Production:

  • @openzeppelin/contracts (5.0.2) - Secure smart contract library
  • @uniswap/v2-core (1.0.1) - Uniswap V2 protocol core
  • @uniswap/v3-core (1.0.0) - Uniswap V3 protocol core

Development:

  • hardhat (2.22.14) - Ethereum development environment
  • @nomicfoundation/hardhat-foundry (1.1.2) - Foundry integration for Hardhat
  • @uniswap/router-sdk (^1.3.0) - SDK for routing logic
  • @uniswap/sdk-core (^3.0.1) - Core SDK utilities
  • @uniswap/v2-sdk (^3.0.1) - V2 SDK for testing
  • @uniswap/v3-sdk (^3.8.3) - V3 SDK for testing
  • ethers (^5.7.2) - Ethereum library for JavaScript
  • typechain (^4.0.0) - TypeScript bindings for contracts
  • typescript (^3.7.3) - TypeScript compiler

Structure

  • contracts/ - Solidity smart contracts
  • test/ - Test suites (Foundry + Hardhat)
  • script/ - Deployment scripts
  • deploy-addresses/ - Deployed contract addresses per network
  • audit/ - Security audit reports

Auto-Update Instructions

After changes to files in this directory or subdirectories, run /update-claude-md to keep this documentation synchronized with the codebase.