Ethernaut
https://ethernaut.openzeppelin.com/
Foundry
https://github.com/foundry-rs/foundry
@0xEval has written an excellent run through of how the repo is configured and how to get setup on it.
https://eval.hashnode.dev/ethernaut-x-foundry-0x0-hello-ethernaut
This repo is setup to enable you to run the ethernaut levels locally rather than on Rinkeby. As a result you will see some contracts that are not related to individual level but instead to ethernaut's core contracts which determine if you have passed the level.
These are the Ethernaut.sol & BaseLevel.sol contracts in the root of ./src and the factory contracts which have a naming convention of [LEVEL_NAME]Factory.sol in each levels repo. Have a read through if interested in what they do otherwise they can be ignored.
Make sure you're on the latest version of forge, what is your forge —version output? If it doesn’t show a date, try rm -rf ~/.cargo/bin/cast && rm -rf ~/.cargo/bin/forge
At the root of the repo run
foundryup
forge install
forge test
File Locations
Individual Levels can be found in their respective folders in the ./src folder.
Eg Fallback is located in ./src/Fallback/Fallback.sol
Tests for each level can be found in the ./src/test folder and have the naming convention [LEVEL_NAME].t.sol
Eg Fallback test are located in ./src/test/Fallback.t.sol
@cmichelio for his hardhat x ethernaut repo https://github.com/MrToph/ethernaut
@0xSage for his great ethernaut tutorials - breaking down how each level can be defeated https://medium.com/hackernoon/ethernaut-lvl-0-walkthrough-abis-web3-and-how-to-abuse-them-d92a8842d71b
@gakonst for his help on the foundry support channels and the tool itself https://github.com/gakonst/foundry
@the_ethernaut for the puzzles to solve & learn from https://ethernaut.openzeppelin.com/level/0x9CB391dbcD447E645D6Cb55dE6ca23164130D008