?Uniswap V1 smart contracts
$ git clone https://github.com/Uniswap/contracts-vyper
$ cd contracts-vyper
$ pip3 install virtualenv
$ virtualenv -p python3 env
$ source env/bin/activate
pip install -r requirements.txt
cd vyper
git reset --hard 35038d20bd9946a35261c4c4fbcb27fe61e65f78
cd ..
$ pytest -v tests/