Token Hacker Challenge

The Token Hacker Challenge smart contract.

• Etherscan
• OpenSea
• Twitter: @ferrariep

Description

The Token Hacker Challenge consists of retrieving an ERC-721 key token from an hacked wallet on Ethereum. The hacked wallet private key is publicly available to anyone. The Token Hacker Challenge NFT is locked in its own contract and will be given to the challenge winner along with an ETH prize. The first one that withdraws the key token from the hacked wallet wins the challenge. The key token must be transfered to the Token Hacker Challenge contract using safeTransferFrom to unlock the Token Hacker Challenge NFT and all the Ethers in the Token Hacker Challenge contract. Beware that if you transfer assets to the hacked wallet you will probabily lose them.

Hacked wallet public key

0x36eec75d68eb9440cfe61e3a00d63c6b6ea1f703

Hacked wallet private key

9b9a7b2159a98fc67eb0f63c56a92e1891e608716e8c04011710271a233e9863

Key token address

0xcf8f4ac2f895c7241e90d8968c574aa0c805ca75

Key token id

56

Testing and Development

Clone this repo and cd into the directory to get started.

Docker development environment

You can use Docker to test and interact with smart contracts in a local development environment without the burden of installing anything else.

# build development Docker image based on current source code
docker build -t thc .

# run tests with 'brownie test'
docker run thc test

# run interactive 'brownie console'
docker run -it thc console

Dependencies

If you don't like Docker, you can install development dependencies manually.

• python3 - tested with version 3.10
• brownie - tested with version 1.19.3
• ganache-cli - tested with version 6.12.2

We describe how to install development dependencies on Ubuntu 20.04, the same steps might apply to other operating systems.

We use pipx to install Brownie into a virtual environment and make it available directly from the commandline. You can also install Brownie via pip, in this case it is recommended to use a virtual environment. For more information about installing Brownie read the official documentation.

We use node.js and npm to install ganache-cli globally. We recommend installing the latest LTS versions of node and npm from nvm as we find versions in Ubuntu and Debian repositories to have this problem frequently.

sudo apt install curl gcc python3 python3-dev python3-venv pipx
pipx ensurepath

#install nvm
curl https://raw.githubusercontent.com/creationix/nvm/master/install.sh | bash
source ~/.profile

# install node and npm using nvm
nvm install --lts=Hydrogen

# install ganache-cli
npm install [email protected] --global

# install brownie
pipx install eth-brownie==1.19.3

Running tests

Test scripts are stored in the tests/ directory of this project.

Use brownie test to run the complete test suite.

brownie test