Damn Vulnerable DeFi is the wargame to learn offensive security of DeFi smart contracts.

Throughout numerous challenges you will build the skills to become a bug hunter or security auditor in the space.

Challenges

Each challenge can be considered standalone. Depending on the challenge, you should either stop the system from working, take as much funds as possible, or do some other unexpected things.

Notice: this is the latest version of Damn Vulnerable DeFi (read the announcement and changes). If you're looking for the old version, go to the v1 page.

#	Name
1	Unstoppable
2	Naive receiver
3	Truster
4	Side entrance
5	The rewarder
6	Selfie
7	Compromised
8	Puppet
9	Puppet v2
10	Free rider
11	Backdoor
12	Climber
13	Safe miners

How to play

Clone the repository
Checkout the latest version with git checkout v2.2.0
Install dependencies with yarn
Code your solutions in the provided *.challenge.js files (inside each challenge's folder in the test folder)
Run your exploit for a challenge with yarn run challenge-name. If the challenge is executed successfully, you've passed!

Tips

In all challenges you must use the account called attacker. In Ethers, that may translate to using .connect(attacker).
To code the solutions, you may need to refer to Ethers and Hardhat docs.
In some cases, you may need to code and deploy custom smart contracts.