## Issue Addressed
Resolves#3516
## Proposed Changes
Adds a beacon fallback function for running a beacon node http query on all available fallbacks instead of returning on a first successful result. Uses the new `run_on_all` method for attestation and sync committee subscriptions.
## Additional Info
Please provide any additional information. For example, future considerations
or information useful for reviewers.
## Issue Addressed
Relates to https://github.com/sigp/lighthouse/issues/3416
## Proposed Changes
- Add an `OfflineOnFailure` enum to the `first_success` method for querying beacon nodes so that a val registration request failure from the BN -> builder does not result in the BN being marked offline. This seems important because these failures could be coming directly from a connected relay and actually have no bearing on BN health. Other messages that are sent to a relay have a local fallback so shouldn't result in errors
- Downgrade the following log to a `WARN`
```
ERRO Unable to publish validator registrations to the builder network, error: All endpoints failed https://BN_B => RequestFailed(ServerMessage(ErrorMessage { code: 500, message: "UNHANDLED_ERROR: BuilderMissing", stacktraces: [] })), https://XXXX/ => Unavailable(Offline), [omitted]
```
## Additional Info
I think this change at least improves the UX of having a VC connected to some builder and some non-builder beacon nodes. I think we need to balance potentially alerting users that there is a BN <> VC misconfiguration and also allowing this type of fallback to work.
If we want to fully support this type of configuration we may want to consider adding a flag `--builder-beacon-nodes` and track whether a VC should be making builder queries on a per-beacon node basis. But I think the changes in this PR are independent of that type of extension.
PS: Sorry for the big diff here, it's mostly formatting changes after I added a new arg to a bunch of methods calls.
Co-authored-by: realbigsean <sean@sigmaprime.io>
## Issue Addressed
Resolves#3388Resolves#2638
## Proposed Changes
- Return the `BellatrixPreset` on `/eth/v1/config/spec` by default.
- Allow users to opt out of this by providing `--http-spec-fork=altair` (unless there's a Bellatrix fork epoch set).
- Add the Altair constants from #2638 and make serving the constants non-optional (the `http-disable-legacy-spec` flag is deprecated).
- Modify the VC to only read the `Config` and not to log extra fields. This prevents it from having to muck around parsing the `ConfigAndPreset` fields it doesn't need.
## Additional Info
This change is backwards-compatible for the VC and the BN, but is marked as a breaking change for the removal of `--http-disable-legacy-spec`.
I tried making `Config` a `superstruct` too, but getting the automatic decoding to work was a huge pain and was going to require a lot of hacks, so I gave up in favour of keeping the default-based approach we have now.
## Issue Addressed
Addresses https://github.com/sigp/lighthouse/issues/2926
## Proposed Changes
Appropriated from https://github.com/sigp/lighthouse/issues/2926#issuecomment-1039676768:
When a node returns *any* error we call [`CandidateBeaconNode::set_offline`](c3a793fd73/validator_client/src/beacon_node_fallback.rs (L424)) which sets it's `status` to `CandidateError::Offline`. That node will then be ignored until the routine [`fallback_updater_service`](c3a793fd73/validator_client/src/beacon_node_fallback.rs (L44)) manages to reconnect to it.
However, I believe there was an issue in the [`CanidateBeaconNode::refesh_status`](c3a793fd73/validator_client/src/beacon_node_fallback.rs (L157-L178)) method, which is used by the updater service to see if the node has come good again. It was holding a [write lock on the `status` field](c3a793fd73/validator_client/src/beacon_node_fallback.rs (L165)) whilst it polled the node status. This means a long timeout would hog the write lock and starve other processes.
When a VC is trying to access a beacon node for whatever purpose (getting duties, posting blocks, etc), it performs [three passes](c3a793fd73/validator_client/src/beacon_node_fallback.rs (L432-L482)) through the lists of nodes, trying to run some generic `function` (closure, lambda, etc) on each node:
- 1st pass: only try running `function` on all nodes which are both synced and online.
- 2nd pass: try running `function` on all nodes that are online, but not necessarily synced.
- 3rd pass: for each offline node, try refreshing its status and then running `function` on it.
So, it turns out that if the `CanidateBeaconNode::refesh_status` function from the routine update service is hogging the write-lock, the 1st pass gets blocked whilst trying to read the status of the first node. So, nodes that should be left until the 3rd pass are blocking the process of the 1st and 2nd passes, hence the behaviour described in #2926.
## Additional Info
NA
## Proposed Changes
Remove the check for exact equality on the beacon node spec when polling `/config/spec` from the VC. This check was always overzealous, and mostly served to check that the BN was configured for upcoming forks. I've replaced it by explicit checks of the `altair_fork_epoch` and `bellatrix_fork_epoch` instead.
## Additional Info
We should come back to this and clean it up so that we can retain compatibility while removing the field `default`s we installed.
## Proposed Changes
Instead of checking for strict equality between a BN's spec and the VC's local spec, just check the genesis fork version. This prevents us from failing eagerly for minor differences, while still protecting the VC from connecting to a completely incompatible BN.
A warning is retained for the previous case where the specs are not exactly equal, which is to be expected if e.g. running against Infura before Infura configures the mainnet Altair fork epoch.
## Issue Addressed
Related to: #2259
Made an attempt at all the necessary updates here to publish the crates to crates.io. I incremented the minor versions on all the crates that have been previously published. We still might run into some issues as we try to publish because I'm not able to test this out but I think it's a good starting point.
## Proposed Changes
- Add description and license to `ssz_types` and `serde_util`
- rename `serde_util` to `eth2_serde_util`
- increment minor versions
- remove path dependencies
- remove patch dependencies
## Additional Info
Crates published:
- [x] `tree_hash` -- need to publish `tree_hash_derive` and `eth2_hashing` first
- [x] `eth2_ssz_types` -- need to publish `eth2_serde_util` first
- [x] `tree_hash_derive`
- [x] `eth2_ssz`
- [x] `eth2_ssz_derive`
- [x] `eth2_serde_util`
- [x] `eth2_hashing`
Co-authored-by: realbigsean <seananderson33@gmail.com>
## Proposed Changes
Implement the consensus changes necessary for the upcoming Altair hard fork.
## Additional Info
This is quite a heavy refactor, with pivotal types like the `BeaconState` and `BeaconBlock` changing from structs to enums. This ripples through the whole codebase with field accesses changing to methods, e.g. `state.slot` => `state.slot()`.
Co-authored-by: realbigsean <seananderson33@gmail.com>
## Issue Addressed
Closes#2274
## Proposed Changes
* Modify the `YamlConfig` to collect unknown fields into an `extra_fields` map, instead of failing hard.
* Log a debug message if there are extra fields returned to the VC from one of its BNs.
This restores Lighthouse's compatibility with Teku beacon nodes (and therefore Infura)
## Issue Addressed
NA
## Proposed Changes
- Removes a duplicated log in the fallback code for the VC.
- Updates the text in the remaining de-duped log.
## Additional Info
Example
```
Dec 23 05:19:54.003 WARN Beacon node is syncing endpoint: http://xxxx:5052/, head_slot: 88224, sync_distance: 161774
Dec 23 05:19:54.003 WARN Beacon node is not synced endpoint: http://xxxxx:5052/
```
## Issue Addressed
- Resolves#1883
## Proposed Changes
This follows on from @blacktemplar's work in #2018.
- Allows the VC to connect to multiple BN for redundancy.
- Update the simulator so some nodes always need to rely on their fallback.
- Adds some extra deprecation warnings for `--eth1-endpoint`
- Pass `SignatureBytes` as a reference instead of by value.
## Additional Info
NA
Co-authored-by: blacktemplar <blacktemplar@a1.net>
