---
id: eth-typing
version: "6.0.0"
license: unclear
license_treatment: permissive
maintenance: active
---

# eth-typing — eth-typing: Common type annotations for ethereum python packages

License: permissive · Maintenance: active · Downloads: 6.8M/mo

## What it is and what it does

eth-typing is a library that defines common type annotations used across Ethereum Python packages. It provides standardized type hints for Ethereum-specific concepts, allowing developers to write type-safe code when working with Ethereum in Python.

The package is maintained as part of the Ethereum ecosystem and serves as a foundational layer for type consistency across related libraries. It has a single runtime dependency (typing_extensions) and supports Python 3.10 through 3.14, making it lightweight and easy to integrate into existing projects.

Use it for:

- Define type-safe function signatures when building Ethereum smart contract interaction libraries.
- Ensure consistent type annotations across multiple Ethereum-related Python packages in a project.
- Reduce boilerplate by importing pre-defined Ethereum types instead of defining them locally.
- Enable IDE autocompletion and static type checking for Ethereum-specific data structures.

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

Provides standardized type annotations for Ethereum Python packages, enabling type-safe development across the Ethereum ecosystem.

Yes. This is a lightweight, actively maintained foundational library with no security vulnerabilities, permissive licensing, and minimal dependencies. Install it if you're building Ethereum Python tools or integrating with Ethereum libraries that depend on it for type consistency.

## Install

pip install eth-typing
uv add eth-typing
poetry add eth-typing

## Installing eth-typing

Before you install: Low install friction with a single lightweight dependency (typing_extensions). Active maintenance with recent releases; last commit 2026-03-25. Supports Python 3.10 through 3.14.

License in practice: MIT license (permissive) means you can use this freely in commercial and open-source projects with minimal restrictions.

Quickstart:

pip install eth-typing

from eth_typing import Address

# Use type annotations in your code
def transfer(to_address: Address, amount: int):
    pass

Requires Python 3.10 or later.

Verify before relying:

- Complete list of type definitions and classes exported by the package.
- Whether the package is actively used as a dependency by major Ethereum Python libraries.

## Package facts

- License: not declared (permissive)
- Python support: supports_current
- Install friction: low
- Maintenance: active
- Downloads: 6.8M/month (top 5,000 on PyPI)
- Known vulnerabilities: none known

## Tags

ethereum type annotations, eth python typing, ethereum type hints, blockchain python types, ethereum development types, ethereum, type-hints, blockchain

[View on SkillFed](https://skillfed.io/packages/eth-typing) · [View on PyPI](https://pypi.org/project/eth-typing/)