ahrenstein / fasteth

A fast, asynchronous, python ethereum RPC client.

fasteth

Abstract

fasteth is an asynchronous python abstraction layer for the Ethereum JSON RPC. It biases towards using native python types and dataclasses to represent Ethereum data, whilst remaining lightweight and making minimal assumptions.

Goals

The motivation for creating this is to provide fast, asynchronous, native python, access to the Ethereum JSON RPC. Extant python libraries are synchronous and provide additional abstraction which may not always be needed. This library favors speed and asynchronicity.

Status

This project is still a work in progress.

Further Reading

TODO(These should be links)

Quickstart

This project aims to make it easy to make async requests and get responses back from the Ethereum JSON RPC. Here is a simple example:

pip install fasteth

import asyncio
from fasteth import AsyncEthereumJSONRPC

async def do_requests():
    async with AsyncEthereumJSONRPC() as rpc:
        print(await rpc.network_version())

asyncio.run(do_requests())

See the fastapi docs for a great explanation of async/concurrency. As an aside, fastapi was the inspiration for the name fasteth.

Getting Involved

If you enjoy this project, feel free to become a patron by sending ETH or ERC20 tokens to: 0x9200574cc23c6a1398d6d7bd06c5ae36b738604a

But, better yet - contribute to the project.

Developer Guide

You'll need poetry.

poetry install
poetry shell

You'll also need a running instance of ganache-cli and in should be started with the argument --networkId 1337

Running the pre-commit hooks on demand

Initial setup:

pre-commit install
pre-commit install --hook-type pre-push

Then:

pre-commit run --all-files

This will run:

During commit

• Check if there are merge conflicts.
• Check if there are debug statements, we don't want those in checked in code
• Lint with flake8.
• Use black to format the code, modifies files in-place if the code in the changeset is not already black compliant and fails the hook.

During push

• All of the above runs also pytest with verbose flag (if any python files have changed).

Building the PyPI package

poetry build

It's that simple.