Ethernaut Solutions

Writeups from solving Ethernaut to build smart-contract security skills.

What this is

Ethernaut is a Web3 CTF focused on Ethereum contract vulnerabilities. Each level has a vulnerable contract that must be exploited.

Structure

• ethernaut-notes.md - short writeups per level (Bug -> Exploit -> Fix)
• console-snippets.md - browser console + hardhat snippets per level
• attack-scripts.md - exploit contracts/scripts used
• Readme.md - overview

How to use these notes

• Start with ethernaut-notes.md to get the idea, then jump to console-snippets.md
• If a level needs a contract, check attack-scripts.md
• I keep these short on purpose; the goal is to remember the trick, not rewrite the docs

Tools used

• Remix (quick testing)
• Foundry (most exploits)
• Hardhat (some levels)
• Web3 console / Cast (storage reads, raw tx)

Disclaimer

Educational use only.