KS note

2️⃣ #ETHERNAUT #level_2 #Fallout

i solved this challenge using cast :

cast send $CHALLENGE_CONTRACT_ADDRESS "Fal1out()" --rpc-url $RPC_URL --private-key $PRIVATE_KEY

but i wrote the Solidity code too.

🥷🍷 <Happy Hacking/>

135 viewsKian, 20:55

KS note

3️⃣ #ETHERNAUT #level_3 #Coin_Flip

must run Attack.sh file to solve the challenge

🥷🍷 <Happy Hacking/>

156 viewsKian, 20:57

KS note

4️⃣ #ETHERNAUT #level_4 #Telephone

must run the attack() function using cast:

cast send $CHALLENGE_CONTRACT_ADDRESS "attack(address)" $PLAYER_ADDRESS --rpc-url $RPC_URL --private-key $PRIVATE_KEY

🥷🍷 <Happy Hacking/>

155 viewsKian, 20:58

KS note

5️⃣ #ETHERNAUT #level_5 #Token

🥷🍷 <Happy Hacking/>

148 viewsKian, 21:00

KS note

6️⃣ #ETHERNAUT #level_6 #Delegation

must solve this challenge using cast and call the challenge contract :

cast send $CHALLENGE_CONTRACT_ADDRESS "pwn()" --rpc-url $RPC_URL --private-key $PRIVATE_KEY

but i wrote the Solidity Code too,

🥷🍷 <Happy Hacking/>

164 viewsKian, 21:01

KS note

7️⃣ #ETHERNAUT #level_7 #Force

🥷🍷 <Happy Hacking/>

140 viewsKian, 21:04

KS note

8️⃣ #ETHERNAUT #level_8 #Vault

you can access the private variables using cast :

cast storage $CHALLENGE_CONTRACT_ADDRESS 1 --rpc-url $RPC_URL

🥷🍷 <Happy Hacking/>

174 viewsKian, 21:05

KS note

9️⃣ #ETHERNAUT #level_9 #King

🥷🍷 <Happy Hacking/>

163 viewsKian, 21:06

KS note

🔟 #ETHERNAUT #level_10 #Re_entrancy

🥷🍷 <Happy Hacking/>

162 viewsKian, edited 21:07

KS note

1️⃣1️⃣ #ETHERNAUT #level_11 #Elevator

🥷🍷 <Happy Hacking/>

🔥1

171 viewsKian, 21:08

KS note

1️⃣2️⃣ #ETHERNAUT #level_12 #Privacy

you can access the private variables using cast :

cast storage $CHALLENGE_CONTRACT_ADDRESS 5 --rpc-url $RPC_URL

🥷🍷 <Happy Hacking/>

181 viewsKian, 21:09

KS note

🔑 Smart Contract Obfuscation Techniques

1️⃣ https://titan.csit.rmit.edu.au/~e13322/hai_dong/papers/Bian_TSE2022.pdf
2️⃣ https://www.mecs-press.org/ijmsc/ijmsc-v8-n3/IJMSC-V8-N3-3.pdf
3️⃣ https://degatchi.com/articles/smart-contract-obfuscation/

🔥2

192 viewsKian, edited 21:30

KS note

📦 Transient Storage

1️⃣ https://hackernoon.com/transient-storage-ethereums-game-changing-feature
2️⃣ https://etherworld.co/2022/12/13/transient-storage-for-beginners/
3️⃣ https://soliditylang.org/blog/2024/01/26/transient-storage/
4️⃣ https://youtu.be/0-hiB5I39Mk?si=-0qy3ZeiuW_L9D8p
5️⃣ https://solidity-by-example.org/transient-storage/
6️⃣ https://www.evm.codes/#5c?fork=cancun

Hackernoon

Transient Storage: Ethereum's Game-Changing Feature

Explore Transient Storage in Ethereum: a game-changer reducing transaction costs and enhancing operations. Discover its mechanism, significance, and use cases.

189 viewsKian, 21:33

KS note

🧩 Function's Correct order

[public/external/internal/private] [view/pure/none] [payable|OPTIONAL] [virtual|OPTIONAL] [override|OPTIONAL] [customModifier|OPTIONAL] [returns|OPTIONAL]

182 viewsKian, edited 06:20

KS note

🔎 Decode The `msg.data`

⁉️ Why msg.data[4:] => Because the first 4-byte of data is function signature

// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;

contract Decode {
    function run(
        string memory _i1,
        address _i2,
        uint256 _i3,
        bool _i4
    ) public pure returns (
        string memory,
        address,
        uint256,
        bool
    ) {
        return abi.decode(
            msg.data[4:],
            (string,address,uint256,bool)
        );
    }
}