Ethereum consensus client in Rust
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Michael Sproul d2e3d4c6f1 Add flag to disable lock timeouts (#2714)
## Issue Addressed

Mitigates #1096

## Proposed Changes

Add a flag to the beacon node called `--disable-lock-timeouts` which allows opting out of lock timeouts.

The lock timeouts serve a dual purpose:

1. They prevent any single operation from hogging the lock for too long. When a timeout occurs it logs a nasty error which indicates that there's suboptimal lock use occurring, which we can then act on.
2. They allow deadlock detection. We're fairly sure there are no deadlocks left in Lighthouse anymore but the timeout locks offer a safeguard against that.

However, timeouts on locks are not without downsides:

They allow for the possibility of livelock, particularly on slower hardware. If lock timeouts keep failing spuriously the node can be prevented from making any progress, even if it would be able to make progress slowly without the timeout. One particularly concerning scenario which could occur would be if a DoS attack succeeded in slowing block signature verification times across the network, and all Lighthouse nodes got livelocked because they timed out repeatedly. This could also occur on just a subset of nodes (e.g. dual core VPSs or Raspberri Pis).

By making the behaviour runtime configurable this PR allows us to choose the behaviour we want depending on circumstance. I suspect that long term we could make the timeout-free approach the default (#2381 moves in this direction) and just enable the timeouts on our testnet nodes for debugging purposes. This PR conservatively leaves the default as-is so we can gain some more experience before switching the default.
2021-10-19 00:30:40 +00:00
.github Add Altair tests to op pool (#2723) 2021-10-16 05:07:23 +00:00
account_manager Export slashing protection per validator (#2674) 2021-10-19 00:30:38 +00:00
beacon_node Add flag to disable lock timeouts (#2714) 2021-10-19 00:30:40 +00:00
book Allow custom certificates when connecting to BN (#2703) 2021-10-15 00:07:11 +00:00
boot_node Rename eth2_libp2p to lighthouse_network (#2702) 2021-10-19 00:30:39 +00:00
common Rename eth2_libp2p to lighthouse_network (#2702) 2021-10-19 00:30:39 +00:00
consensus Update to consensus-spec-tests v1.1.3 (#2722) 2021-10-16 05:07:21 +00:00
crypto Get arbitrary check passing (2.0) (#2710) 2021-10-14 02:58:11 +00:00
lcli Rename eth2_libp2p to lighthouse_network (#2702) 2021-10-19 00:30:39 +00:00
lighthouse Add flag to disable lock timeouts (#2714) 2021-10-19 00:30:40 +00:00
scripts Fix name collision in script (#2678) 2021-10-05 22:54:11 +00:00
slasher Rename eth2_libp2p to lighthouse_network (#2702) 2021-10-19 00:30:39 +00:00
testing Update to consensus-spec-tests v1.1.3 (#2722) 2021-10-16 05:07:21 +00:00
validator_client Export slashing protection per validator (#2674) 2021-10-19 00:30:38 +00:00
.dockerignore Update spec tests to v1.1.0-beta.4 (#2548) 2021-09-25 05:58:35 +00:00
.editorconfig Add editorconfig template 2019-03-11 15:09:57 +11:00
.gitignore Delete uncompressed genesis states (#2092) 2020-12-16 03:44:05 +00:00
.gitmodules Replace EF tests submodule with a makefile 2019-09-08 04:19:54 +10:00
bors.toml Add Windows to Bors config (#2358) 2021-05-20 00:23:08 +00:00
Cargo.lock Rename eth2_libp2p to lighthouse_network (#2702) 2021-10-19 00:30:39 +00:00
Cargo.toml Rename eth2_libp2p to lighthouse_network (#2702) 2021-10-19 00:30:39 +00:00
CONTRIBUTING.md Update CONTRIBUTING.md (#751) 2020-01-03 10:45:53 +11:00
Cross.toml Ensure RUSTFLAGS is passed through on cross compile (#1529) 2020-08-17 10:06:06 +00:00
Dockerfile Update outdated dependencies (#2425) 2021-07-05 00:54:17 +00:00
Dockerfile.cross Multiarch docker GitHub actions (#2065) 2020-12-09 06:06:37 +00:00
LICENSE Update License to Apache 2.0 2019-04-15 16:47:35 +10:00
Makefile Ignore cargo audit advisory (#2730) 2021-10-18 21:59:27 +00:00
README.md Fix readme typo (#2312) 2021-04-14 02:30:54 +00:00
SECURITY.md Add how users should report security vulnerabilities for this repository (#2562) 2021-09-07 01:54:05 +00:00

Lighthouse: Ethereum 2.0

An open-source Ethereum 2.0 client, written in Rust and maintained by Sigma Prime.

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Overview

Lighthouse is:

  • Ready for use on Eth2 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 2.0 specification.

Eth2 Deposit Contract

The Lighthouse team acknowledges 0x00000000219ab540356cBB839Cbe05303d7705Fa as the canonical Eth2 deposit contract address.

Documentation

The Lighthouse Book contains information for users and developers.

The Lighthouse team maintains a blog at lighthouse.sigmaprime.io which contains periodical 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. Alternatively, you may use the sigp/lighthouse gitter.

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).