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Michael Sproul 3052db29fe Implement el_offline and use it in the VC (#4295) 
## Issue Addressed

Closes https://github.com/sigp/lighthouse/issues/4291, part of #3613.

## Proposed Changes

- Implement the `el_offline` field on `/eth/v1/node/syncing`. We set `el_offline=true` if:
  - The EL's internal status is `Offline` or `AuthFailed`, _or_
  - The most recent call to `newPayload` resulted in an error (more on this in a moment).

- Use the `el_offline` field in the VC to mark nodes with offline ELs as _unsynced_. These nodes will still be used, but only after synced nodes.
- Overhaul the usage of `RequireSynced` so that `::No` is used almost everywhere. The `--allow-unsynced` flag was broken and had the opposite effect to intended, so it has been deprecated.
- Add tests for the EL being offline on the upcheck call, and being offline due to the newPayload check.


## Why track `newPayload` errors?

Tracking the EL's online/offline status is too coarse-grained to be useful in practice, because:

- If the EL is timing out to some calls, it's unlikely to timeout on the `upcheck` call, which is _just_ `eth_syncing`. Every failed call is followed by an upcheck [here](693886b941/beacon_node/execution_layer/src/engines.rs (L372-L380)), which would have the effect of masking the failure and keeping the status _online_.
- The `newPayload` call is the most likely to time out. It's the call in which ELs tend to do most of their work (often 1-2 seconds), with `forkchoiceUpdated` usually returning much faster (<50ms).
- If `newPayload` is failing consistently (e.g. timing out) then this is a good indication that either the node's EL is in trouble, or the network as a whole is. In the first case validator clients _should_ prefer other BNs if they have one available. In the second case, all of their BNs will likely report `el_offline` and they'll just have to proceed with trying to use them.

## Additional Changes

- Add utility method `ForkName::latest` which is quite convenient for test writing, but probably other things too.
- Delete some stale comments from when we used to support multiple execution nodes.
2023-05-17 05:51:56 +00:00
..
account_utils Clippy lints for rust 1.66 (#3810) 2022-12-16 04:04:00 +00:00
clap_utils Split common crates out into their own repos (#3890) 2023-04-28 01:15:40 +00:00
compare_fields Clippy 1.67 (#3916) 2023-01-27 09:48:42 +00:00
compare_fields_derive Appease Clippy 1.68 and refactor http_api (#4068) 2023-03-13 01:40:03 +00:00
deposit_contract Split common crates out into their own repos (#3890) 2023-04-28 01:15:40 +00:00
directory Update to Rust 1.59 and 2021 edition (#3038) 2022-02-25 00:10:17 +00:00
eth2 Implement el_offline and use it in the VC (#4295) 2023-05-17 05:51:56 +00:00
eth2_config Delete Kiln and Ropsten configs (#4038) 2023-03-01 06:16:14 +00:00
eth2_interop_keypairs Split common crates out into their own repos (#3890) 2023-04-28 01:15:40 +00:00
eth2_network_config Split common crates out into their own repos (#3890) 2023-04-28 01:15:40 +00:00
eth2_wallet_manager Replace OpenOptions::new with File::options to be readable (#3059) 2022-03-07 06:30:18 +00:00
filesystem Fix rust 1.65 lints (#3682) 2022-11-04 07:43:43 +00:00
lighthouse_metrics Support histogram buckets (#3391) 2022-09-13 01:57:44 +00:00
lighthouse_version Release v4.1.0 (#4191) 2023-04-20 00:51:38 +00:00
lockfile Replace OpenOptions::new with File::options to be readable (#3059) 2022-03-07 06:30:18 +00:00
logging Add log debounce to work processor (#3045) 2022-03-07 06:30:17 +00:00
lru_cache Correct a race condition when dialing peers (#4056) 2023-03-16 05:44:54 +00:00
malloc_utils Switch allocator to jemalloc (#3697) 2023-01-20 04:19:29 +00:00
monitoring_api Remove fallback support from eth1 service (#3594) 2022-10-04 08:33:39 +00:00
oneshot_broadcast Fix concurrency issue with oneshot_broadcast (#3596) 2022-09-21 10:52:14 +00:00
sensitive_url Fix lints for Rust 1.63 (#3459) 2022-08-12 00:56:39 +00:00
slot_clock Rate limiting backfill sync (#3936) 2023-04-03 03:02:55 +00:00
system_health Health Endpoints for UI (#3668) 2022-11-15 05:21:26 +00:00
target_check Update to Rust 1.59 and 2021 edition (#3038) 2022-02-25 00:10:17 +00:00
task_executor Enable proposer boost re-orging (#2860) 2022-12-13 09:57:26 +00:00
test_random_derive Update to Rust 1.59 and 2021 edition (#3038) 2022-02-25 00:10:17 +00:00
unused_port Test failing CI tests due to port conflicts (#4134) 2023-03-30 06:08:38 +00:00
validator_dir Split common crates out into their own repos (#3890) 2023-04-28 01:15:40 +00:00
warp_utils Appease Clippy 1.68 and refactor http_api (#4068) 2023-03-13 01:40:03 +00:00
README.md Directory Restructure (#1163) 2020-05-18 21:24:23 +10:00

README.md

eth2

Common crates containing eth2-specific logic.