[Feature] Typings and/or contract method autogeneration using web3py

[gabrielfior]

• Version: 6.15.1
• Python: 3.5
• OS: linux
• pip freeze output

pycryptodome==3.20.0
pydantic==2.6.3
pydantic-settings==2.2.1
pydantic_core==2.16.3
pytest==8.0.2
python-dateutil==2.9.0.post0
python-dotenv==1.0.1
streamlit==1.32.0
types-pytz==2024.1.0.20240203
types-requests==2.31.0.20240218
typing-inspect==0.9.0
typing_extensions==4.10.0
urllib3==2.2.1
web3==6.15.1
websockets==12.0
Werkzeug==3.0.1

What was wrong?

I'm using web3py to interact with a deployed contract. Instead of calling the functions by-hand and using error-prone strings, I would like to use auto-generated contract methods (similar to what Typechain (https://github.com/dethcrypto/TypeChain) does in Typescript.

Is there support for typings and/or autogeneration in web3py? If not, is there a package that achieves this?

Thank you!

[naoki-maeda]

Hello @gabrielfior

I also felt the need for an auto-generation tool, so I created one.
Please give it a try!
https://github.com/naoki-maeda/py-contract-codegen

[johnny-emp]

https://github.com/empyrealapp/eth-packages I built an implementation that I feel addresses this requirement. I think this could serve as an alternative to web3.py for typed bindings, or if there is interest it could be integrated into the web3.py toolchain.

https://eth-packages.empyrealsdk.com/getting-started/contracts/func/#struct-definitions might be a cool place to reference in the documentation

[slundqui]

We also needed auto-generated contract methods, and have written a package on top of web3py for this. Feel free to check it out!
https://github.com/delvtech/pypechain