# Week 1& 2 Update

Hi there, There has been some changes on what project I will work on.

After the [lodestar announcement of blending zig and javascript](https://blog.chainsafe.io/lodestar-zig-and-javascript/), I am quite interested into contributing to the lodestar client since i might get to work on zig in a consensus client along with some alignment of some personal projects. So I will be focus on implementing ERA file support in lodestar.

I started by reading the [ethresearch post on era files](https://ethresear.ch/t/era-archival-files-for-block-and-consensus-data/13526) and the [nimbus docs](https://nimbus.guide/era-store.html) along with the [official specs](https://github.com/eth-clients/e2store-format-specs).
Caymen from lodestar also shared with me some resources namely [the geth doc on downloading era files](https://geth.ethereum.org/docs/fundamentals/downloadera) along with a blog on [history expiry](https://etherworld.co/2025/06/16/history-expiry-moves-forward-in-ethereums-fusaka-upgrade/).

# Work for the week
- Discuss with Caymen on verifying if my approach is correct
- probably start with adding types and interfaces for era
- Read the nimbus implementation