## Issue Addressed
Move to latest official version of blst (v0.3.1). Incorporate all the subgroup check API changes.
## Proposed Changes
Update Cargo.toml to use official blst crate 0.3.1
Modifications to blst.rs wrapper for subgroup check API changes
## Additional Info
The overall subgroup check methodology is public keys should be check for validity using key_validate() at time of first seeing them. This will check for infinity and in group. Those keys can then be cached for future usage. All calls into blst set the pk_validate boolean to false to indicate there is no need for on the fly checking of public keys in the library. Additionally the public keys are supposed to be validated for proof of possession outside of blst.
For signatures the subgroup check can be done at time of deserialization, prior to being used in aggregation or verification, or in the blst aggregation or verification functions themselves. In the interface wrapper the call to subgroup_check has been left for one instance, although that could be moved into the
verify_multiple_aggregate_signatures() call if wanted. Checking beforehand does save some compute resources in the scenario a bad signature is received. Elsewhere the subgroup check is being done inside the higher level operations. See comments in the code.
All checks on signature are done for subgroup only. There are no checks for infinity. The rationale is an aggregate signature could technically equal infinity. If any individual signature was infinity (invalid) then it would fail at time of verification. A loss of compute resources, although safety would be preserved.
## Description
This PR updates Lighthouse to tokio 0.3. It includes a number of dependency updates and some structural changes as to how we create and spawn tasks.
This also brings with it a number of various improvements:
- Discv5 update
- Libp2p update
- Fix for recompilation issues
- Improved UPnP port mapping handling
- Futures dependency update
- Log downgrade to traces for rejecting peers when we've reached our max
Co-authored-by: blacktemplar <blacktemplar@a1.net>
## Issue Addressed
part of #1883
## Proposed Changes
Adds a new cli argument `--eth1-endpoints` that can be used instead of `--eth1-endpoint` to specify a comma-separated list of endpoints. If the first endpoint returns an error for some request the other endpoints are tried in the given order.
## Additional Info
Currently if the first endpoint fails the fallbacks are used silently (except for `try_fallback_test_endpoint` that is used in `do_update` which logs a `WARN` for each endpoint that is not reachable). A question is if we should add more logs so that the user gets warned if his main endpoint is for example just slow and sometimes hits timeouts.
## Proposed Changes
A user on Discord reported build issues when trying to compile Lighthouse checked out to a path with spaces in it. I've fixed the issue upstream in `leveldb-sys` (https://github.com/skade/leveldb-sys/pull/22), but rather than waiting for a new release of the `leveldb` crate, we can also work around the issue by disabling Snappy in LevelDB, which we weren't using anyway.
This may also have the side-effect of slightly improving compilation times, as LevelDB+Snappy was found to be a substantial contributor to build time (although I'm not sure how much was LevelDB and how much was Snappy).
## Issue Addressed
Closes#1823
## Proposed Changes
* Use OS-level file locking for validator keystores, eliminating problems with lockfiles lingering after ungraceful shutdowns (`SIGKILL`, power outage). I'm using the `fs2` crate because it's cross-platform (unlike `file-lock`), and it seems to have the most downloads on crates.io.
* Deprecate + disable `--delete-lockfiles` CLI param, it's no longer necessary
* Delete the `validator_dir::Manager`, as it was mostly dead code and was only used in the `validator list` command, which has been rewritten to read the validator definitions YAML instead.
## Additional Info
Tested on:
- [x] Linux
- [x] macOS
- [x] Docker Linux
- [x] Docker macOS
- [ ] Windows
## Issue Addressed
- Add metrics to keep track of peer counts by sync type
- Add metric to keep track of the number of syncing chains in range
## Proposed Changes
Plugin to the network metrics update interval and update too the counts for peers wrt to their sync status with us
## Additional Info
For the peer counts
- By the way it is implemented the numbers won't always match to the total peer count in the `libp2p` metric.
- Updating the gauge with every change is messy because it requires to be updated on connection (in the `eth2_libp2p` crate, while metrics are defined in the `network` crate) on Goodbye sent (for an `IrrelevantPeer`) either in the `beacon_processor` or the `peer_manager`, and on disconnection. Since this is not a critical metric I think counting once every second is enough. If you think more accuracy is needed we can do it too, but it would be harder to maintain)
ATM those look like this
## Issue Addressed
NA
## Proposed Changes
- Adds a HTTP server to the VC which provides Prometheus metrics.
- Moves the health metrics into the `lighthouse_metrics` crate so it can be shared between BN/VC.
- Sprinkle some metrics around the VC.
- Update the book to indicate that we now have VC metrics.
- Shifts the "waiting for genesis" logic later in the `ProductionValidatorClient::new_from_cli`
- This is worth attention during the review.
## Additional Info
- ~~`clippy` has some new lints that are failing. I'll deal with that in another PR.~~
## Issue Addressed
Boot nodes were being successfully created and publishing valid ENRs however the `eth2` field was not being saved to disk leading to a discrepancy between published ENR and disk ENR.
If the `eth2` field is known, it is now constructed in the initial ENR and saved to disk.
Previous mainnet bootnodes did not contain the `eth2` field and these have also been updated.
## Issue Addressed
NA
## Proposed Changes
Presently `master` is stable (and will be sunsetted) which means our docs only update after a release. This PR sets the docs to build on the `unstable` branch, which is equivalent to what what we've always had.
## Additional Info
This does raise the question of whether or not docs should target `stable` or `unstable`, but I'd prefer to maintain current functionality and merge #1966 for now. I think having two versions might be handy, one for stable and one for unstable; I don't imagine this very difficult to achieve.
## Issue Addressed
Closes#1873
## Proposed Changes
Fixes the bug in slashing protection import (#1873) by pruning the database upon import.
Also expands the test generator to cover this case and a few others which are under discussion here:
https://ethereum-magicians.org/t/eip-3076-validator-client-interchange-format-slashing-protection/4883
## Additional Info
Depending on the outcome of the discussion on Eth Magicians, we can either wait for consensus before merging, or merge our preferred solution and patch things later.
## Issue Addressed
NA
## Proposed Changes
Updates the validator guide to provide instructions for mainnet users.
## Additional Info
- ~~Blocked on #1751~~
## Issue Addressed
Closes#1790
## Proposed Changes
Make a new method that creates an empty transaction with `TransactionBehavior::Exclusive` to check whether the slashing protection is locked. Call this method before attempting to create or import new validator keystores.
## Additional Info
N/A
Co-authored-by: realbigsean <seananderson33@gmail.com>
## Issue Addressed
Two issues related to empty batches
- Chain target's was not being advanced when the batch was successful, empty and the chain didn't have an optimistic batch
- Not switching finalized chains. We now switch finalized chains requiring a minimum work first
## Issue Addressed
Resolves#1890
## Proposed Changes
Change the slasher database schema to key indexed attestations by `(target_epoch, indexed_attestation_root)` instead of just `indexed_attestation_root`. This allows more straight-forward pruning (linear scan), that is also "re-entrant". By re-entrant, we mean that a pruning pass that gets stuck because of a `MapFull` error can attempt to commit midway, and be resumed later without issue. The previous pruning strategy for indexed attestations did not have this property. There was also a flaw in the previous pruning that could leave "zombie" indexed attestations in the database (ones not referenced by any attester record), which could build up and contribute to bloat (although in practice I think they occur quite infrequently).
## Additional Info
During testing I noticed that a `MapFull` error can still occur during the commit of the transaction itself, which is irritating, but not unbearable. This PR should at least reduce the frequency with which users need to manually resize their DB, and if the `MapFull` on commit rears its ugly head too often we could use a dynamic strategy (temporarily increase the size of the map until the transaction commits).
The extra bytes for the epoch make the database a bit heavier, so the size estimate docs have been updated to reflect this. This is also a breaking schema change, so anyone using a v0 database from a few hours ago will need to drop it and update 😅
This is an implementation of a slasher that lives inside the BN and can be enabled via `lighthouse bn --slasher`.
Features included in this PR:
- [x] Detection of attester slashing conditions (double votes, surrounds existing, surrounded by existing)
- [x] Integration into Lighthouse's attestation verification flow
- [x] Detection of proposer slashing conditions
- [x] Extraction of attestations from blocks as they are verified
- [x] Compression of chunks
- [x] Configurable history length
- [x] Pruning of old attestations and blocks
- [x] More tests
Future work:
* Focus on a slice of history separate from the most recent N epochs (e.g. epochs `current - K` to `current - M`)
* Run out-of-process
* Ingest attestations from the chain without a resync
Design notes are here https://hackmd.io/@sproul/HJSEklmPL
## Issue Addressed
- Resolves#1424
## Proposed Changes
Add a `GET lighthouse/staking` that returns 200 if the node is ready to stake (i.e., `--eth1` flag is present) or a 404 otherwise.
Whilst the VC is waiting for the genesis time to start (i.e., when the genesis state is known), check the `lighthouse/staking` endpoint and log an error if the node isn't configured for staking.
## Additional Info
NA
## Issue Addressed
NA
## Proposed Changes
Adds the `--import-all-attestations` flag which tells the `network::AttestationService` to import/aggregate all attestations after verification (instead of only ones for subnets that are relevant to local validators).
This is useful for testing/debugging and also for creating back-up nodes that should be all cached up and ready for any validator.
## Additional Info
NA
## Issue Addressed
we have a log saying we add a peer to a chain, and an another one in case the chain is not syncing. To avoid needing to peer there two (and reduce log entries) simply log the chain's syncing state in the chain's KV
## Issue Addressed
Closes#1719
## Proposed Changes
Lift the internal `RwLock`s and `Mutex`es from the `Observed*` data structures to resolve the race conditions described in #1719.
Most of this work was done by @paulhauner on his `lift-locks` branch, I merely updated it for the current `master` and checked over it.
## Additional Info
I think it would be prudent to test this on a testnet or two before mainnet launch, just to be sure that the extra lock contention doesn't negatively impact performance.
## Issue Addressed
- Resolves#1945
## Proposed Changes
- As per #1945, fix a log message from the metrics server that was falsely claiming to be from the api server.
- Ensure successful api request logs are published to debug, not trace. This is something I've wanted to do for a while.
## Additional Info
NA
## Issue Addressed
NA
## Proposed Changes
- Caches later blocks than is required by `ETH1_FOLLOW_DISTANCE`.
- Adds logging to `warn` if the eth1 cache is insufficiently primed.
- Use `max_by_key` instead of `max_by` in `BeaconChain::Eth1Chain` since it's simpler.
- Rename `voting_period_start_timestamp` to `voting_target_timestamp` for accuracy.
## Additional Info
The reason for eating into the `ETH1_FOLLOW_DISTANCE` and caching blocks that are closer to the head is due to possibility for `SECONDS_PER_ETH1_BLOCK` to be incorrect (as is the case for the Pyrmont testnet on Goerli).
If `SECONDS_PER_ETH1_BLOCK` is too short, we'll skip back too far from the head and skip over blocks that would be valid [`is_candidate_block`](https://github.com/ethereum/eth2.0-specs/blob/v1.0.0/specs/phase0/validator.md#eth1-data) blocks. This was the case on the Pyrmont testnet and resulted in Lighthouse choosing blocks that were about 30 minutes older than is ideal.
## Issue Addressed
Resolves#1333
## Proposed Changes
- Remove `deposit_signature_set()` function
- Prevent deposits from being in `SignatureSets`
- User `Signature.verify()` to verify deposit signatures rather than a signature set which uses `fast_aggregate_verify()`
## Additional Info
n/a
## Issue Addressed
`BlocksByRange` requests were the main culprit of a series of timeouts to peer's requests in general because they produce build up in the router's processor. Those were moved to the blocking executor but a task is being spawned for each; also not ideal since the amount of resources we give to those is not controlled
## Proposed Changes
- Move `BlocksByRange` and `BlocksByRoots` to the `beacon_processor`. The processor crafts the responses and sends them.
- Move too the processing of `StatusMessage`s from other peers. This is a fast operation but it can also build up and won't scale if we keep it in the router (processing one at the time). These don't need to send an answer, so there is no harm in processing them "later" if that were to happen. Sending responses to status requests is still in the router, so we answer as soon as we see them.
- Some "extras" that are basically clean up:
- Split the `Worker` logic in sync methods (chain processing and rpc blocks), gossip methods (the majority of methods) and rpc methods (the new ones)
- Move the `status_message` function previously provided by the router's processor to a more central place since it is used by the router, sync, network_context and beacon_processor
- Some spelling
## Additional Info
What's left to decide/test more thoroughly is the length of the queues and the priority rules. @paulhauner suggested at some point to put status above attestations, and @AgeManning had described an importance of "protecting gossipsub" so my solution is leaving status requests in the router and RPC methods below attestations. Slashings and Exits are at the end.
## Issue Addressed
Closes#1906Closes#1907
## Proposed Changes
- Emits warnings when the KDF parameters are two low.
- Returns errors when the KDF parameters are high enough to pose a potential DoS threat.
- Validates AES IV length is 128 bits, errors if empty, warnings otherwise.
## Additional Info
NIST advice used for PBKDF2 ranges https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-132.pdf.
Scrypt ranges are based on the maximum value of the `u32` (i.e 4GB of memory)
The minimum range has been set to anything below the default fields.
## Issue Addressed
Closes#1889
## Proposed Changes
- Error when passwords which use invalid UTF-8 characters during encryption.
- Add some tests
## Additional Info
I've decided to error when bad characters are used to create/encrypt a keystore but think we should allow them during decryption since either the keystore was created
- with invalid UTF-8 characters (possibly by another client or someone whose password is random bytes) in which case we'd want them to be able to decrypt their keystore using the right key.
- without invalid characters then the password checksum would almost certainly fail.
Happy to add them to decryption if we want to make the decryption more trigger happy 😋 , it would only be a one line change and would tell the user which character index is causing the issue.
See https://eips.ethereum.org/EIPS/eip-2335#password-requirements
## Issue Addressed
Catching up on a few eth2 spec updates:
## Proposed Changes
- adding query params to the `GET pool/attestations` endpoint
- allowing the `POST pool/attestations` endpoint to accept an array of attestations
- batching attestation submission
- moving `epoch` from a path param to a query param in the `committees` endpoint
## Additional Info
Co-authored-by: realbigsean <seananderson33@gmail.com>
## Issue Addressed
NA
## Proposed Changes
Removes most of the temporary string initializations in network metrics and replaces them by directly using `&str`. This further improves on PR https://github.com/sigp/lighthouse/pull/1895.
For the subnet id handling the current approach uses a build script to create a static map. This has the disadvantage that the build script hardcodes the number of subnets. If we want to use more than 64 subnets we need to adjust this in the build script.
## Additional Info
We still have some string initializations for the enum `PeerKind`. To also replace that by `&str` I created a PR in the libp2p dependency: https://github.com/sigp/rust-libp2p/pull/91. Either we wait with merging until this dependency PR is merged (and all conflicts with the newest libp2p version are resolved) or we just merge as is and I will create another PR when the dependency is ready.
## Issue Addressed
NA
## Proposed Changes
Users on Discord (and @protolambda) have experienced this error (or variants of it):
```
Failed to update eth1 cache: GetDepositLogsFailed("Eth1 node returned error: {\"code\":-32005,\"message\":\"query returned more than 10000 results\"}")
```
This PR allows users to reduce the span of blocks searched for deposit logs and therefore reduce the size of the return result. Hopefully experimentation with this flag can lead to finding a better default value.
## Additional Info
NA
## Issue Addressed
*Should* address #1917
## Proposed Changes
Stops the `BackgroupMigrator` rx channel from backing up with big `BeaconState` messages.
Looking at some logs from my Medalla node, we can see a discrepancy between the head finalized epoch and the migrator finalized epoch:
```
Nov 17 16:50:21.606 DEBG Head beacon block slot: 129214, root: 0xbc7a…0b99, finalized_epoch: 4033, finalized_root: 0xf930…6562, justified_epoch: 4035, justified_root: 0x206b…9321, service: beacon
Nov 17 16:50:21.626 DEBG Batch processed service: sync, processed_blocks: 43, last_block_slot: 129214, chain: 8274002112260436595, first_block_slot: 129153, batch_epoch: 4036
Nov 17 16:50:21.626 DEBG Chain advanced processing_target: 4036, new_start: 4036, previous_start: 4034, chain: 8274002112260436595, service: sync
Nov 17 16:50:22.162 DEBG Completed batch received awaiting_batches: 5, blocks: 47, epoch: 4048, chain: 8274002112260436595, service: sync
Nov 17 16:50:22.162 DEBG Requesting batch start_slot: 129601, end_slot: 129664, downloaded: 0, processed: 0, state: Downloading(16Uiu2HAmG3C3t1McaseReECjAF694tjVVjkDoneZEbxNhWm1nZaT, 0 blocks, 1273), epoch: 4050, chain: 8274002112260436595, service: sync
Nov 17 16:50:22.654 DEBG Database compaction complete service: beacon
Nov 17 16:50:22.655 INFO Starting database pruning new_finalized_epoch: 2193, old_finalized_epoch: 2192, service: beacon
```
I believe this indicates that the migrator rx has a backed-up queue of `MigrationNotification` items which each contain a `BeaconState`.
## TODO
- [x] Remove finalized state requirement for op-pool
## Proposed Changes
In an attempt to fix OOM issues and database consistency issues observed by some users after the introduction of compaction in v0.3.4, this PR makes the following changes:
* Run compaction less often: roughly every 1024 epochs, including after long periods of non-finality. I think the division check proposed by Paul is pretty solid, and ensures we don't miss any events where we should be compacting. LevelDB lacks an easy way to check the size of the DB, which would be another good trigger.
* Make it possible to disable the compaction on finalization using `--auto-compact-db=false`
* Make it possible to trigger a manual, single-threaded foreground compaction on start-up using `--compact-db`
* Downgrade the pruning log to `DEBUG`, as it's particularly noisy during sync
I would like to ship these changes to affected users ASAP, and will document them further in the Advanced Database section of the book if they prove effective.
