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https://github.com/eth-brownie/brownie

A Python-based development and testing framework for smart contracts targeting the Ethereum Virtual Machine.
https://github.com/eth-brownie/brownie

ethereum solidity vyper web3py

Last synced: 10 days ago
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A Python-based development and testing framework for smart contracts targeting the Ethereum Virtual Machine.

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# Brownie



[![Pypi Status](https://img.shields.io/pypi/v/eth-brownie.svg)](https://pypi.org/project/eth-brownie/) [![Docs Status](https://readthedocs.org/projects/eth-brownie/badge/?version=latest)](https://eth-brownie.readthedocs.io/en/stable/)



Brownie is a Python-based development and testing framework for smart contracts targeting the [Ethereum Virtual Machine](https://solidity.readthedocs.io/en/v0.6.0/introduction-to-smart-contracts.html#the-ethereum-virtual-machine).



**Brownie is no longer actively maintained**. Future releases may come sporadically - or never at all. Check out [Ape Framework](https://github.com/ApeWorX/ape) for all your python Ethereum development needs.



## Features



* Full support for [Solidity](https://github.com/ethereum/solidity) (`>=0.4.22`) and [Vyper](https://github.com/vyperlang/vyper) (`>=0.1.0-beta.16`)

* Contract testing via [`pytest`](https://github.com/pytest-dev/pytest), including trace-based coverage evaluation

* Property-based and stateful testing via [`hypothesis`](https://github.com/HypothesisWorks/hypothesis/tree/master/hypothesis-python)

* Powerful debugging tools, including python-style tracebacks and custom error strings

* Built-in console for quick project interaction



## Dependencies



* [python3](https://www.python.org/downloads/release/python-3910/) version 3.10 or greater, python3-dev

* [hardhat](https://github.com/NomicFoundation/hardhat) or [ganache](https://github.com/trufflesuite/ganache)



Tested with ganache version [7.9.2](https://github.com/trufflesuite/ganache/releases/tag/v7.0.2), however it is generally recommended to use hardhat because ganache has been sunsetted.



## Installation



### via `pipx`



The recommended way to install Brownie is via [`pipx`](https://github.com/pipxproject/pipx). pipx installs Brownie into a virtual environment and makes it available directly from the commandline. Once installed, you will never have to activate a virtual environment prior to using Brownie.



To install `pipx`:



```bash

python3 -m pip install --user pipx

python3 -m pipx ensurepath

```



To install Brownie using `pipx`:



```bash

pipx install eth-brownie

```



To upgrade to the latest version:



```bash

pipx upgrade eth-brownie

```



To use lastest master or another branch as version:

```bash

pipx install git+https://github.com/eth-brownie/brownie.git@master

```



### via `pip`



You can install the latest release via [`pip`](https://pypi.org/project/pip/):



```bash

pip install eth-brownie

```



### via `setuptools`



You can clone the repository and use [`setuptools`](https://github.com/pypa/setuptools) for the most up-to-date version:



```bash

git clone https://github.com/eth-brownie/brownie.git

cd brownie

python3 setup.py install

```



### as a library



If you want to install brownie inside your own project (rather than as a standalone cli tool):



```bash

export BROWNIE_LIB=1

pip install eth-brownie

```



This loosens the pins on all dependencies. You'll want to make sure you have your own `requirements.txt` to make sure upgrades upstream don't surprise anyone.



### for development



There are extra tools that are helpful when developing:



```bash

git clone https://github.com/eth-brownie/brownie.git

cd brownie

python3 -m venv venv

./venv/bin/pip install wheel

./venv/bin/pip install -e . -r requirements-dev.txt

```



Upgrading the pinned versions of dependencies is easy:

```

./venv/bin/pip-compile --upgrade

./venv/bin/pip-compile --upgrade requirements-dev.in

./venv/bin/pip-compile --upgrade requirements-windows.in

```



Even small upgrades of patch versions have broken things in the past, so be sure to run all tests after upgrading things!



## Quick Usage



To initialize a new Brownie project, start by creating a new folder. From within that folder, type:



```bash

brownie init

```



Next, type `brownie --help` for basic usage information.



## Documentation and Support



Brownie documentation is hosted at [Read the Docs](https://eth-brownie.readthedocs.io/en/latest/).



If you have any questions about how to use Brownie, feel free to ask on [Ethereum StackExchange](https://ethereum.stackexchange.com/) or join us on [Gitter](https://gitter.im/eth-brownie/community).



## Testing



To run the tests, first install the developer dependencies:



```bash

pip install -e . -r requirements-dev.txt

```



Then use [`tox`](https://github.com/tox-dev/tox) to run the complete suite against the full set of build targets, or [`pytest`](https://github.com/pytest-dev/pytest) to run tests against a specific version of Python. If you are using [`pytest`](https://github.com/pytest-dev/pytest) you must include the `-p no:pytest-brownie` flag to prevent it from loading the Brownie plugin.



### Using Docker



You can use a sandbox container provided in the [`docker-compose.yml`](docker-compose.yml) file for testing inside a Docker environment.



This container provides everything you need to test using a Python 3.6 interpreter.



Start the test environment:



```bash

docker-compose up -d

```



To open a session to the container:



```bash

docker-compose exec sandbox bash

```



To run arbitrary commands, use the `bash -c` prefix.



```bash

docker-compose exec sandbox bash -c ''

```



For example, to run the tests in `brownie/tests/test_format_input.py`:



```bash

docker-compose exec sandbox bash -c 'python -m pytest tests/convert/test_format_input.py'

```



#### Attaching to dockerized RPC clients



You can also attach to a RPC client already running inside a docker container.



For example for running ganache-cli you could just startup the official ganache-cli docker image:



```bash

docker run -p 8545:8545 trufflesuite/ganache-cli

```



Then in another terminal on your host you could connect to it:



```bash

brownie console

```



If you have your RPC client bound to a specific hostname e.g. `ganache` you could create a separate brownie network for it:



```bash

brownie networks add Development dev cmd=ganache-cli host=http://ganache:8545

```



Then connect to it with:



```bash

brownie console --network dev

```



## Contributing



Help is always appreciated! Feel free to open an issue if you find a problem, or a pull request if you've solved an issue.



Please check out our [Contribution Guide](CONTRIBUTING.md) prior to opening a pull request, and join the Brownie [Gitter channel](https://gitter.im/eth-brownie/community) if you have any questions.



## License



This project is licensed under the [MIT license](LICENSE).