The Ethernaut


The Ethernaut is a Web3/Solidity based wargame inspired by overthewire.org, played in the Ethereum Virtual Machine. Each level is a smart contract that needs to be ‘hacked’. The game is 100% open source and all levels are contributions made by other players.

Here you will find my notes on the levels I have solved. Currently, they are not meant to be read as a comprehensive guide to understanding Ethernaut levels.

My primary focus is on solving the levels, and these notes act as checkpoints for my understanding.


Hello EthernautHello Ethernaut FallbackFallback Fal1outFal1out Coin FlipCoin Flip TelephoneTelephone TokenToken DelegationDelegation ForceForce VaultVault KingKing Re-entrancyRe-entrancy ElevatorElevator ElevatorElevator Gatekeeper OneGatekeeper One Gatekeeper TwoGatekeeper Two Naught CoinNaught Coin PreservationPreservation RecoveryRecovery Magic NumberMagic Number Alien CodexAlien Codex DenialDenial ShopShop DexDex Dex TwoDex Two Puzzle WalletPuzzle Wallet MotorbikeMotorbike Double Entry PointDouble Entry Point Good SamaritanGood Samaritan Gatekeeper ThreeGatekeeper Three SwitchSwitch