A Typescript implementation eth2 fork choice

Usage no npm install needed!

<script type="module">
  import chainsafeLodestarForkChoice from 'https://cdn.skypack.dev/@chainsafe/lodestar-fork-choice';


Lodestar Monorepo

ETH2.0_Spec_Version 0.12.1 Discord codecov Maintainability ES Version Node Version

Lodestar is a Typescript implementation of the Ethereum 2.0 specification developed by ChainSafe Systems.


Getting started


Architecture Overview


Read our contributors document, submit an issue or talk to us on our discord!

Meeting Notes

Feel free to check out our meeting notes and documents on HackMD.


We are a local group of Toronto open source developers. As such, all of our open source work is funded by grants. We all take the time out of our hectic lives to contribute to the Ethereum ecosystem. If you want to donate, you can send us ETH at the following address: lodestar.chainsafe.eth


This monorepo repository contains a suite of Ethereum 2.0 packages.

Package Version License Docs Description
@chainsafe/lodestar npm License: LGPL v3 documentation Beacon chain client
@chainsafe/lodestar-validator npm License: LGPL v3 documentation Validator client
@chainsafe/lodestar-cli npm License: LGPL v3 documentation Command line tool for lodestar
@chainsafe/lodestar-beacon-state-transition npm License documentation Eth2 beacon state transition
@chainsafe/lodestar-types npm License documentation Eth2 typescript and SSZ types
@chainsafe/lodestar-params npm License documentation Eth2 network parameters
@chainsafe/lodestar-utils npm License documentation Misc utility functions used across lodestar
@chainsafe/lodestar-config npm License documentation Eth2 types and params bundled together
@chainsafe/lodestar-spec-test-util npm License documentation Test harness for Eth2 spec tests
@chainsafe/lodestar-db npm License documentation Read/write persistent Eth2 data
@chainsafe/lodestar-fork-choice npm License documentation Beacon chain fork choice

Creating Release

  • run yarn run release in project root directory
  • choose version increment
  • open PR to master