Ethereum meets JavaScript.

Lodestar is an open-source Ethereum consensus client written in Typescript.

Lodestar is a consensus beacon node and validator client for the Ethereum blockchain. Lodestar's tools and libraries enable Ethereum protocol development for the JavaScript ecosystem.

Don't trust, verify: Run your own node.

Running your own full Ethereum node ensures your own independence. Validate with a minority client like Lodestar to make the Ethereum network safer.

Lodestar is making it possible for JavaScript to participate

For stakers, node operators, and data consumers

Using Lodestar to secure the Ethereum network brings us closer to a world with greater resiliency, sovereignty, and sustainability

For researchers, builders, and experimenters

We provide the tools to empower the largest group of developers to generate value on Ethereum and progress development of the protocol

Ethereum Light Clients: a node on every device.

Light clients enable more people to use Ethereum as first-class citizens, verifying data on the blockchain without relying on centralized service providers. Lodestar is actively contributing to light client development for Ethereum.

In practice, light clients:

Rely on the sync committee.

Provide a degree of verifiability.

Stay updated inexpensively.

Direct benefits

Provides direct access to the blockchain.

Supports true censorship resistance.

Minimizes hardware requirements.

Supporting the Ethereum developer ecosystem

Lodestar is an alternative consensus client.

Ethereum's decentralized network has greater resilience supporting multi-client architecture. Running alternative clients reduces your risk during correlated failures.

Written in the world’s most popular programming language

Lodestar is written in TypeScript, a superset of JavaScript, making it an accessible entry point into Ethereum development.

Join the many developers who are improving Lodestar and our JavaScript libraries in experimental ways.

Stake with Lodestar

Run Lodestar. Earn rewards. And do your part in securing a $100 billion network. There are multiple ways to stake with Lodestar.

2018

ChainSafe receives first-ever grant from Vitalik Buterin to develop Lodestar.

2019

ChainSafe receives a grant to develop tooling such as SSZ, BLS, and SHA256-AS for Ethereum Consensus (eth2) in the JS ecosystem.

2020

Lodestar participates in early beacon chain testnets such as Medalla with the staking community.

2021

Proposed the first Lodestar mainnet block on Ethereum. Released first in-browser light client demonstration that tracks consensus using sync committees.

2022

Successfully participated in the Ethereum merge to Proof-of-Stake. Released Lodestar v1.0.

2023

Lodestar proposes the first block on the new 1.4M validator public testnet, Holesky

2018

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2023

The stars of Lodestar.

Thank you for your incredible contributions to Ethereum.

Contributing to Lodestar makes you eligible to mint a GitPOAP badge!

Support Lodestar

Support for Lodestar comes primarily from public goods funding via organizations like the Ethereum Foundation and Gitcoin. Our team supports and participates in the Protocol Guild, a collective of Ethereum contributors.

Built with love by protocol engineers.

Lodestar is maintained by ChainSafe, one of the world’s leading blockchain research and development firms.

Join the team to build a brazen future.