How does mainnet forking help in the testing process?

Mainnet forking allows you to simulate a local blockchain based on the state of a live network, enabling you to test interactions with existing protocols like Uniswap or Aave without spending real ETH.

Does it provide gas usage reports?

Yes, it includes configurations for gas reporters that help you track and optimize the gas consumption of your contract functions during the testing phase.

Can I use this skill to find security vulnerabilities?

While it doesn't replace a manual audit, it includes patterns for fuzzing, reentrancy testing, and access control validation to help identify common security flaws early.

Does this skill support both Hardhat and Foundry?

Yes, it provides comprehensive setup guides, configuration templates, and testing patterns for both the Hardhat (JavaScript/TypeScript) and Foundry (Solidity) frameworks.

Web3 Smart Contract Testing

Name: Web3 Smart Contract Testing
Author: HermeticOrmus

byHermeticOrmus

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Security & Testing

Develops and executes comprehensive test suites for Solidity smart contracts using Hardhat and Foundry frameworks.

Web3 Smart Contract Testing equips Claude Code with advanced strategies for validating blockchain applications through professional-grade testing environments. It streamlines the creation of robust test suites, covering everything from basic unit tests and property-based fuzzing to complex mainnet forking and gas optimization analysis. By integrating best practices for Hardhat and Foundry, this skill ensures smart contracts are secure, efficient, and production-ready before deployment to Ethereum-compatible networks.

Key Features

012 GitHub stars

02Property-based fuzzing for edge-case vulnerability detection

03Advanced mainnet forking for realistic DeFi protocol simulation

04Precise gas consumption analysis and optimization reporting

05Seamless CI/CD integration and Etherscan verification scripts

06Automated Hardhat and Foundry test suite configuration

Use Cases

01Validating complex DeFi protocol logic through mainnet state simulations

02Optimizing contract bytecode to significantly reduce on-chain transaction costs

03Auditing smart contracts for security vulnerabilities and access control

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add hermeticormus/libreuiux-claude-code web3-testing

For use in Claude.ai and ChatGPT

Download Skill