Let’s play OpenZeppelin Ethernaut CTF — learning Solidity security while playing!

The Ethernaut is a Web3/Solidity based war game created by OpenZeppelin.

Each level is a smart contract that needs to be ‘hacked’. The game acts both as a tool for those interested in learning Ethereum, and as a way to catalog historical hacks in levels. Levels can be infinite, and the game does not require to be played in any particular order.

How to play

If you want to play it by your own, just go to the Ethernaut website and start solving the challenges.

Otherwise, you could clone my own personal repository, remove the solutions in the test folder and build your own! I have explained in the README file how to do it, and it should be pretty easy.

Solutions to each puzzle

Each day I will publish the solution to a new challenge, so stay tuned.

The Ethernaut Challenge #1 Solution — Fallback
The Ethernaut Challenge #2 Solution — Fallout
The Ethernaut Challenge #3 Solution — Coin Flip
The Ethernaut Challenge #4 Solution — Telephone
The Ethernaut Challenge #5 Solution — Token
The Ethernaut Challenge #6 Solution — Delegation
The Ethernaut Challenge #7 Solution — Force
The Ethernaut Challenge #8 Solution — Vault
The Ethernaut Challenge #9 Solution — King
The Ethernaut Challenge #10 Solution — Re-entrancy
The Ethernaut Challenge #11 Solution — Elevator
The Ethernaut Challenge #12 Solution — Privacy
The Ethernaut Challenge #13 Solution — Gatekeeper One
The Ethernaut Challenge #14 Solution — Gatekeeper Two
The Ethernaut Challenge #15 Solution — Naught Coin
The Ethernaut Challenge #16 Solution — Preservation
The Ethernaut Challenge #17 Solution — Recovery
The Ethernaut Challenge #18 Solution — Magic Number
The Ethernaut Challenge #19 Solution — Denial
The Ethernaut Challenge #20 Solution — Shop
The Ethernaut Challenge #21 Solution — Dex
The Ethernaut Challenge #22 Solution — Dex Two
The Ethernaut Challenge #23 Solution — Puzzle Wallet
The Ethernaut Challenge #24 Solution — Double Entry Point
More to come…