CosmWasm CTF (or CW-CTF for short) is a repository that consists of intentionally written vulnerable CosmWasm smart contracts. You can think of this as a CosmWasm version of OpenZeppelin Ethernaut challenge. While the challenges here will be as native CosmWasm as possible (i.e., bugs that would only appear in the CW environment), it would be beneficial to add other challenges that work across different blockchain environments such as Solidity or Solana ecosystems.

Please do not use this in production.

Every challenge in the repo comes with an associated proof of concept (POC) exploit code. The exploit code is written as test cases with their test case name as exploit(). Most of the time, you can reproduce the vulnerability by running the following command:

cargo test

Having a proof of concept exploit code will give you an idea of how the contract is vulnerable and how an attacker can exploit it, which can serve as a good learning opportunity.

Did you happen to find an unintended bug in the challenge? Or have a new vulnerable contract you want to share? Or maybe just a simple efficiency suggestion? Feel free to open an issue or submit a pull request! Please keep in mind that for now, only bugs with an exploitable scenario and an accompanying proof of concept exploit code will be accepted.

• If you're entirely new to Rust or CosmWasm, the Terra Academy is an excellent tutorial to pick up the basics.
• For simplicity, the OSMO denomination used in the contract assumes 0 decimals.