Ethernaut solution using Foundry

Prequesites

1. Install foundry

Run test

forge test -vvvv

Run for a specific file :

forge test -vvvv --match-path ./test/Level01.t.sol

Add env parameters

cp .env.example .env

Add wallet information, for better security don't use your main wallet for testing code.

Make Outsidecall to solve ethernaut

1. Add RPC url to foundry.toml
2. Add PRIVATE_KEY to .env
3. Call possible using : forge script ./script/Level01.s.sol --broadcast -vvvv --rpc-url goerli

Goerli price have exploded since I've done ethernaut, recommended to use a L2 testnet

Deploy an Attacker Contract

forge create --rpc-url goerli --private-key <your_private> src/Level04-Attacker.sol:AttackerLevel04

Get the storage of a deployed contract

cast storage <contractAddress> <slotNumber> --rpc-url goerli

Architecture

Test folder

All the files to deploy & test the exploit locally

Script folder

All the files to test exploit on chain

State

Levels	locally	on-chain (script)
00-HelloEthernaut	✅	✅
01-Fallback	✅	✅
02-Fallout	✅	✅
03-CoinFlip	✅	❌
04-Telephone	✅	✅
05-Token	❌	❌ (logic present)
06-Delegation	❌	✅
07-Force	✅	✅
08-Vault	❌	✅
09-King	✅	✅
10-Reentrancy	❌	✅
11-Elevator	✅	✅
12-Privacy	❌	✅
13-GatekeeperOne	❌	❌
14-GatekeeperTwo	❌	❌
15-NaughtCoin	✅	✅
16-Preservation	✅	✅
17-Recovery	❌	✅
18-MagicNumber	❌	✅
19-AlienCodex	❌	✅
20-Denial	✅	✅
21-Shop	❌	❌
22-Dex	✅	✅
23-DexTwo	✅	✅
24-PuzzleWallet	❌	✅
25-Motorbike	❌	✅
26-DoubleEntryPoint	❌	❌
27-GoodSamaritan	❌	✅
28-GateKeeperThree	❌	❌

Note: most of levels are solved. I encountered some difficulties to make them all work locally and on-chain, feel free to drop a PR to solve that 🙏