Black Scholes contract written in Cairo

Project built with nile

Remark

Methods in the file contracts/safe_math.cairo are taken from Cairo-SafeMath repo from Nethermind.

Useful commands

Compile contracts
```
nile compile
```
Start starknet-dev
```
nile node
```
Launch the environment
```
source env/bin/activate
```
Run the test
```
pytest tests/test_blackscholes.py
```