Welcome, Solidity Developers & Researchers! 🎉

Welcome to the Solidity Challenges Repository, a platform for Solidity developers and security researchers. This repository offers a wide range of challenges, from language-specific tasks to exploit-focused scenarios.

🦶 Choose Your Path

• Exploits: Identify vulnerabilities and exploit the contracts.
• Solidity: Test your knowledge with language-specific challenges.

🏆 Feature Challenges

Type	Challenge	Author	Discussion
Exploit	Airdrop	PutraLaksmana	View
Solidity	Correct writeMyData	vicsnet	View

🚨 Exploit Challenges

#	Challenge	Author
16	Weighted Voting	ZCalz
15	Succession	passandscore
14	Airdrop	PutraLaksmana
13	Instigator	passandscore
12	Private Treasure	passandscore
11	Sideline	passandscore
10	Combination Lock	passandscore
9	Mimic	passandscore
8	Lucky Spin	passandscore
7	False Start	passandscore
6	ERC20 Vault Exploit	IzuMan
5	Sherwood Bank	IzuMan
4	Steal	X_Drained
3	Auction	scadamsuab
2	Gridlock	passandscore
1	Etherstore	passandscore

🚨 Solidity Challenges

#	Challenge	Author
6	Users reporting incorrect game count	passandscore
5	Correct writeMyData	vicsnet
4	Update userOperation	passandscore
3	Parse the given bytes to return both the function selector and data	passandscore
2	Ensure secure randomness in this lottery contract	codyrhoten
1	The test should revert when attempting to mint as an unauthorized user	passandscore

🚀 Installation

1. Clone the repository.
2. Install Foundry.
3. Run forge build to set up the project.

🤔 Usage

Each challenge includes:

• A README file in src/<challenge-type>/<challenge-name>/README.md.
• Contracts in src/<challenge-type>/<challenge-name>/.
• A Foundry test in test/<challenge-type>/<challenge-name>/<ChallengeName>.t.sol.

To solve a challenge:

1. Review the README file.
2. Uncover issues in the provided contracts.
3. Provide your solution in the test file.
4. Test your solution with forge test --mp test/<challenge-type>/<challenge-name>/<ChallengeName>.t.sol.

Rules

• Follow the rules and constraints outlined in the challenge's README and test file.

📄 Contributor Guidelines

1. Add an Exploit Challenge:

   • Create a new folder under src/exploits/ and test/exploits/ named <challenge-name>.
   • Add your challenge's smart contracts in src/exploits/<challenge-name>/.
   • Create a README.md file in src/exploits/<challenge-name>/ detailing the challenge and constraints.
   • Write a corresponding Foundry test in test/exploits/<challenge-name>/.

2. Add a Solidity Challenge:

   • Create a new folder under src/solidity/ and test/solidity/ named <challenge-name>.
   • Add your challenge's smart contracts in src/solidity/<challenge-name>/.
   • Create a README.md file in src/solidity/<challenge-name>/ detailing the challenge and constraints.
   • Write a corresponding Foundry test in test/solidity/<challenge-name>/.

3. Submit a Solution:

   • Drop your solutions in the discussion section of the challenge.

4. Improve Existing Challenges:

   • Fork the repository and create a new branch.
   • Make improvements or fixes to the existing challenges.
   • Submit a pull request with details about the changes.

5. Review and Discuss:

   • Participate in discussions and provide feedback on pull requests.
   • Engage with the community to help refine challenges and solutions.

🧰 Troubleshooting

For help, visit the Discussions section.

🚨 Disclaimer

This repository contains intentionally vulnerable code for educational purposes. DO NOT USE IN PRODUCTION.