OpenZeppelin Cairo Contracts

A library for secure smart contract development written in Cairo for StarkNet, a decentralized ZK Rollup.

⚠️ WARNING! ⚠️

This is repo contains highly experimental code. Expect rapid iteration. Do not use in production.

Installation

First time?

Before installing Cairo on your machine, you need to install gmp:

sudo apt install -y libgmp3-dev # linux
brew install gmp # mac

If you have any troubles installing gmp on your Apple M1 computer, here’s a list of potential solutions.

Set up the project

Clone the repository

git clone git@github.com:OpenZeppelin/cairo-contracts.git

cd into it and create a Python virtual environment:

cd cairo-contracts
python3 -m venv env
source env/bin/activate

Install the Nile dev environment and then run install to get the Cairo language, a local network, and a testing framework.

pip install cairo-nile
nile install

Usage

Compile the contracts

nile compile --directory openzeppelin

🤖 Compiling all Cairo contracts in the openzeppelin directory
🔨 Compiling openzeppelin/introspection/ERC165.cairo
🔨 Compiling openzeppelin/introspection/IERC165.cairo
🔨 Compiling openzeppelin/token/erc721/ERC721_Mintable_Burnable.cairo
🔨 Compiling openzeppelin/token/erc721/ERC721_Mintable_Pausable.cairo
🔨 Compiling openzeppelin/token/erc721/library.cairo
🔨 Compiling openzeppelin/token/erc721/interfaces/IERC721_Metadata.cairo
🔨 Compiling openzeppelin/token/erc721/interfaces/IERC721.cairo
🔨 Compiling openzeppelin/token/erc721/interfaces/IERC721_Receiver.cairo
🔨 Compiling openzeppelin/token/erc721/utils/ERC721_Holder.cairo
🔨 Compiling openzeppelin/token/erc20/ERC20_Mintable.cairo
🔨 Compiling openzeppelin/token/erc20/ERC20.cairo
🔨 Compiling openzeppelin/token/erc20/library.cairo
🔨 Compiling openzeppelin/token/erc20/ERC20_Pausable.cairo
🔨 Compiling openzeppelin/token/erc20/interfaces/IERC20.cairo
🔨 Compiling openzeppelin/token/erc721_enumerable/ERC721_Enumerable_Mintable_Burnable.cairo
🔨 Compiling openzeppelin/token/erc721_enumerable/library.cairo
🔨 Compiling openzeppelin/token/erc721_enumerable/interfaces/IERC721_Enumerable.cairo
🔨 Compiling openzeppelin/security/pausable.cairo
🔨 Compiling openzeppelin/security/safemath.cairo
🔨 Compiling openzeppelin/security/initializable.cairo
🔨 Compiling openzeppelin/access/ownable.cairo
🔨 Compiling openzeppelin/account/IAccount.cairo
🔨 Compiling openzeppelin/account/Account.cairo
🔨 Compiling openzeppelin/account/AddressRegistry.cairo
🔨 Compiling openzeppelin/utils/constants.cairo
✅ Done

Run tests

Run tests using tox, tox automatically creates an isolated testing environment:

tox

====================== test session starts ======================
platform linux -- Python 3.7.2, pytest-6.2.5, py-1.11.0, pluggy-1.0.0
rootdir: /home/readme/cairo-contracts
plugins: asyncio-0.16.0, web3-5.24.0, typeguard-2.13.0
collected 19 items                                                                                               

tests/test_Account.py ....                                 [ 21%]
tests/test_AddressRegistry.py ..                           [ 31%]
tests/test_ERC20.py ..........                             [ 84%]
tests/test_Initializable.py .                              [ 89%]
tests/test_Ownable.py ..                                   [100%]

Learn

Contract documentation

• Account
• ERC20
• ERC721
• Contract extensibility pattern
• Proxies and upgrades
• Utilities

Cairo

• StarkNet official documentation
• Cairo language documentation
• Perama's Cairo by example
• Cairo 101 workshops

Nile

• Getting started with StarkNet using Nile
• How to manage smart contract deployments with Nile

Security

This project is still in a very early and experimental phase. It has never been audited nor thoroughly reviewed for security vulnerabilities. Do not use in production.

Please report any security issues you find to security@openzeppelin.org.

License

OpenZeppelin Cairo Contracts is released under the MIT License.