538b70495c
This issue was identified during the fusaka audit competition. The [`verify_parent_block_and_finalized_descendant`](62d9302e0f/beacon_node/beacon_chain/src/data_column_verification.rs (L606-L627)) in data column gossip verification currently load the parent first before checking if the column descends from the finalized root. However, the `fork_choice.get_block(&block_parent_root)` function also make the same check internally:8a4f6cf0d5/consensus/fork_choice/src/fork_choice.rs (L1242-L1249)Therefore, if the column does not descend from the finalized root, we return an `UnknownParent` error, before hitting the `is_finalized_checkpoint_or_descendant` check just below. Which means we `IGNORE` the gossip message instead `REJECT`, and the gossip peer is not _immediately_ penalised. This deviates from the spec. However, worth noting that lighthouse will currently attempt to request the parent from this peer, and if the peer is not able to serve the parent, it gets penalised with a `LowToleranceError`, and will get banned after ~5 occurences.ffa7b2b2b9/beacon_node/network/src/sync/network_context.rs (L1530-L1532)This PR will penalise the bad peer immediately instead of performing block lookups before penalising it. Co-Authored-By: Jimmy Chen <jchen.tc@gmail.com>
Lighthouse: Ethereum consensus client
An open-source Ethereum consensus client, written in Rust and maintained by Sigma Prime.
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).