Lion - dapplion 74b8c02630 Reimport the checkpoint sync block (#8417)
We want to not require checkpoint sync starts to include the required custody data columns, and instead fetch them from p2p.


Closes https://github.com/sigp/lighthouse/issues/6837


  The checkpoint sync slot can:
1. Be the first slot in the epoch, such that the epoch of the block == the start checkpoint epoch
2. Be in an epoch prior to the start checkpoint epoch

In both cases backfill sync already fetches that epoch worth of blocks with current code. This PR modifies the backfill import filter function to allow to re-importing the oldest block slot in the DB.

I feel this solution is sufficient unless I'm missing something. ~~I have not tested this yet!~~ Michael has tested this and it works.


Co-Authored-By: dapplion <35266934+dapplion@users.noreply.github.com>

Co-Authored-By: Michael Sproul <michael@sigmaprime.io>
2025-11-19 11:00:38 +00:00
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Lighthouse: Ethereum consensus client

An open-source Ethereum consensus client, written in Rust and maintained by Sigma Prime.

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Overview

Lighthouse is:

  • Ready for use on Ethereum consensus mainnet.
  • Fully open-source, licensed under Apache 2.0.
  • Security-focused. Fuzzing techniques have been continuously applied and several external security reviews have been performed.
  • Built in Rust, a modern language providing unique safety guarantees and excellent performance (comparable to C++).
  • Funded by various organisations, including Sigma Prime, the Ethereum Foundation, Consensys, the Decentralization Foundation and private individuals.
  • Actively involved in the specification and security analysis of the Ethereum proof-of-stake consensus specification.

Staking Deposit Contract

The Lighthouse team acknowledges 0x00000000219ab540356cBB839Cbe05303d7705Fa as the canonical staking deposit contract address.

Documentation

The Lighthouse Book contains information for users and developers.

The Lighthouse team maintains a blog at https://blog.sigmaprime.io/tag/lighthouse which contains periodic progress updates, roadmap insights and interesting findings.

Branches

Lighthouse maintains two permanent branches:

  • stable: Always points to the latest stable release.
    • This is ideal for most users.
  • unstable: Used for development, contains the latest PRs.
    • Developers should base their PRs on this branch.

Contributing

Lighthouse welcomes contributors.

If you are looking to contribute, please head to the Contributing section of the Lighthouse book.

Contact

The best place for discussion is the Lighthouse Discord server.

Sign up to the Lighthouse Development Updates mailing list for email notifications about releases, network status and other important information.

Encrypt sensitive messages using our PGP key.

Donations

Lighthouse is an open-source project and a public good. Funding public goods is hard and we're grateful for the donations we receive from the community via:

  • Gitcoin Grants.
  • Ethereum address: 0x25c4a76E7d118705e7Ea2e9b7d8C59930d8aCD3b (donation.sigmaprime.eth).
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