918121e313
Attempt to fix this error reported by `beaconcha.in` on their Hoodi archive nodes:
> {"code":500,"message":"UNHANDLED_ERROR: DBError(CacheBuildError(BeaconState(MilhouseError(OutOfBoundsIterFrom { index: 1199549, len: 1060000 }))))","stacktraces":[]}
There are only a handful of places where we call `iter_from`.
This one is safe by construction (the check immediately prior ensures `self.pubkeys.len()` is not out of bounds):
cfb1f73310/beacon_node/beacon_chain/src/validator_pubkey_cache.rs (L84-L90)
This one should also be safe, and the indexes used here would not be as large as the ones in the reported error:
cfb1f73310/consensus/state_processing/src/per_epoch_processing/single_pass.rs (L365-L368)
Which leaves one remaining usage which must be the culprit:
cfb1f73310/consensus/types/src/beacon_state.rs (L2109-L2113)
This indexing relies on the invariant that `self.pubkey_cache().len() <= self.validators.len()`. We mostly maintain that invariant, except for in `rebase_caches_on` (fixed in this PR).
The other bug, is that we were calling `rebase_on_finalized` for all "hot" states, which post-v7.1.0 includes states prior to the split which are required by the hdiff grid. This is how we end up calling something like `genesis_state.rebase_on(&split_state)`, which then corrupts the pubkey cache of the genesis state using the newer pubkey cache from the split state.
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).