Commit Graph

2685 Commits

Author SHA1 Message Date
realbigsean
cffa562384
cargo fmt 2023-07-17 16:32:09 -04:00
Pawan Dhananjay
e1d0724abf
Fix more beta compiler warnings 2023-07-17 13:29:12 -07:00
Pawan Dhananjay
382b5abbee
Merge branch 'deneb-free-blobs' into merge-unstable-deneb-june-6th 2023-07-17 11:47:46 -07:00
realbigsean
597389cea5
Merge branch 'merge-unstable-deneb-june-6th' of https://github.com/realbigsean/lighthouse into merge-unstable-deneb-jul-14 2023-07-17 12:41:30 -04:00
realbigsean
aeee5beac2
smol fixes 2023-07-17 10:46:54 -04:00
realbigsean
a618830f8f
fix smol lint 2023-07-17 10:28:37 -04:00
realbigsean
0f514cbb36
fixes after merge 2023-07-17 09:50:32 -04:00
realbigsean
b96db45090
Merge branch 'unstable' of https://github.com/sigp/lighthouse into merge-unstable-deneb-jul-14 2023-07-17 09:33:37 -04:00
Divma
4435a22221 Cleanup unreachable code in lcli::generate_bootnode_enr and some tests (#4485)
## Issue Addressed
n/a Noticed this while working on something else

## Proposed Changes
- leverage the appropriate types to avoid a bunch of `unwrap` and errors

## Additional Info
n/a
2023-07-17 05:31:53 +00:00
Pawan Dhananjay
f2223feb21 Rust 1.71 lints (#4503)
## Issue Addressed

N/A

## Proposed Changes

Add lints for rust 1.71

[3789134](3789134ae2) is probably the one that needs most attention as it changes beacon state code. I changed the `is_in_inactivity_leak ` function to return a `ArithError` as not all consumers of that function work well with a `BeaconState::Error`.
2023-07-17 00:14:19 +00:00
Michael Sproul
03674c7199 Update mev-rs and remove patches (#4496)
## Issue Addressed

Fixes occasional compilation errors with mev-rs (see #4456).

## Proposed Changes

- Update `mev-rs` to the latest version, which allows us to remove hacky `[patch]` sections
- Update the `axum` version used in `watch` so LH only uses a single version
2023-07-17 00:14:15 +00:00
Michael Sproul
6c375205fb Fix HTTP state API bug and add --epochs-per-migration (#4236)
## Issue Addressed

Fix an issue observed by `@zlan` on Discord where Lighthouse would sometimes return this error when looking up states via the API:

> {"code":500,"message":"UNHANDLED_ERROR: ForkChoiceError(MissingProtoArrayBlock(0xc9cf1495421b6ef3215d82253b388d77321176a1dcef0db0e71a0cd0ffc8cdb7))","stacktraces":[]}

## Proposed Changes

The error stems from a faulty assumption in the HTTP API logic: that any state in the hot database must have its block in fork choice. This isn't true because the state's hot database may update much less frequently than the fork choice store, e.g. if reconstructing states (where freezer migration pauses), or if the freezer migration runs slowly. There could also be a race between loading the hot state and checking fork choice, e.g. even if the finalization migration of DB+fork choice were atomic, the update could happen between the 1st and 2nd calls.

To address this I've changed the HTTP API logic to use the finalized block's execution status as a fallback where it is safe to do so. In the case where a block is non-canonical and prior to finalization (permanently orphaned) we default `execution_optimistic` to `true`.

## Additional Info

I've also added a new CLI flag to reduce the frequency of the finalization migration as this is useful for several purposes:

- Spacing out database writes (less frequent, larger batches)
- Keeping a limited chain history with high availability, e.g. the last month in the hot database.

This new flag made it _substantially_ easier to test this change. It was extracted from `tree-states` (where it's called `--db-migration-period`), which is why this PR also carries the `tree-states` label.
2023-07-17 00:14:12 +00:00
Pawan Dhananjay
18760822fe
Fix beta compiler warnings 2023-07-14 13:16:48 -07:00
realbigsean
405e95b0ce
fix merge 2023-07-14 16:15:28 -04:00
realbigsean
42f54ee561
fix merge conflict issues 2023-07-14 16:01:57 -04:00
realbigsean
2b93c0eb0d
remove spec minimal feature gating in tests (#4468)
* remove spec minimal feature gating in tests

* do merge transition in overflow cache test
2023-07-14 12:59:15 -07:00
realbigsean
a6f48f5ecb
Merge branch 'unstable' of https://github.com/sigp/lighthouse into merge-unstable-deneb-june-6th 2023-07-12 13:05:30 -04:00
realbigsean
c016f5d787
gossip validate blobs prior to publish 2023-07-12 12:32:14 -04:00
realbigsean
1599487933
fix tests 2023-07-12 10:13:25 -04:00
Jack McPherson
62c9170755 Remove hidden re-exports to appease Rust 1.73 (#4495)
## Issue Addressed

#4494 

## Proposed Changes

 - Remove explicit re-exports of various types to appease the new compiler lint

## Additional Info

It seems `warn(hidden_glob_reexports)` is the main culprit.
2023-07-12 07:06:00 +00:00
realbigsean
782a53ad9d
fix compile 2023-07-11 16:05:05 -04:00
realbigsean
6fd2ef49e4
Revert "remove into gossip verified block"
This reverts commit 246d52d209.
2023-07-10 10:22:28 -04:00
Paul Hauner
c25825a539 Move the BeaconProcessor into a new crate (#4435)
*Replaces #4434. It is identical, but this PR has a smaller diff due to a curated commit history.*

## Issue Addressed

NA

## Proposed Changes

This PR moves the scheduling logic for the `BeaconProcessor` into a new crate in `beacon_node/beacon_processor`. Previously it existed in the `beacon_node/network` crate.

This addresses a circular-dependency problem where it's not possible to use the `BeaconProcessor` from the `beacon_chain` crate. The `network` crate depends on the `beacon_chain` crate (`network -> beacon_chain`), but importing the `BeaconProcessor` into the `beacon_chain` crate would create a circular dependancy of `beacon_chain -> network`.

The `BeaconProcessor` was designed to provide queuing and prioritized scheduling for messages from the network. It has proven to be quite valuable and I believe we'd make Lighthouse more stable and effective by using it elsewhere. In particular, I think we should use the `BeaconProcessor` for:

1. HTTP API requests.
1. Scheduled tasks in the `BeaconChain` (e.g., state advance).

Using the `BeaconProcessor` for these tasks would help prevent the BN from becoming overwhelmed and would also help it to prioritize operations (e.g., choosing to process blocks from gossip before responding to low-priority HTTP API requests).

## Additional Info

This PR is intended to have zero impact on runtime behaviour. It aims to simply separate the *scheduling* code (i.e., the `BeaconProcessor`) from the *business logic* in the `network` crate (i.e., the `Worker` impls). Future PRs (see #4462) can build upon these works to actually use the `BeaconProcessor` for more operations.

I've gone to some effort to use `git mv` to make the diff look more like "file was moved and modified" rather than "file was deleted and a new one added". This should reduce review burden and help maintain commit attribution.
2023-07-10 07:45:54 +00:00
Michael Sproul
ea2420d193 Bump default checkpoint sync timeout to 3 minutes (#4466)
## Issue Addressed

[Users on Twitter](https://twitter.com/ashekhirin/status/1676334843192397824) are getting checkpoint sync URL timeouts with the default of 60s, so this PR increases the default timeout to 3 minutes.

I've also added a short section to the book about adjusting the timeout with `--checkpoint-sync-url-timeout`.
2023-07-08 13:16:06 +00:00
realbigsean
c4da1ba450
resolve merge issues 2023-07-07 10:17:04 -04:00
realbigsean
cfe2452533
Merge branch 'remove-into-gossip-verified-block' of https://github.com/realbigsean/lighthouse into merge-unstable-deneb-june-6th 2023-07-06 16:51:35 -04:00
realbigsean
246d52d209
remove into gossip verified block 2023-07-06 11:40:58 -04:00
Jack McPherson
a6d5c7d7e0 Correct checks for backfill completeness (#4465)
## Issue Addressed

#4331 

## Proposed Changes

 - Use comparison rather than strict equality between the earliest epoch we know about and the backfill target (which will be the most recent WSP by default or genesis)
 - Add helper function `BackFillSync<T>::would_complete` to achieve this in one location

## Additional Info

 - There's an ad hoc test for this in #4461


Co-authored-by: Age Manning <Age@AgeManning.com>
2023-07-06 07:35:31 +00:00
realbigsean
ba65812972
remove patched dependencies (#4470) 2023-07-05 15:53:35 -04:00
realbigsean
d41193c318
fix failing network tests (#4472) 2023-07-05 15:52:59 -04:00
realbigsean
d9254b7ded
update get blobs endpoint name from blobs to blob_sidecars (#4467)
* changed name

* Fix sidecars

* update get blobs endpoint name from blobs to blob_sidecars

---------

Co-authored-by: Rahul Dogra <rahulcooldogra@gmail.com>
2023-07-05 12:04:12 -04:00
Paul Hauner
dfcb3363c7 Release v4.3.0 (#4452)
## Issue Addressed

NA

## Proposed Changes

Bump versions

## Additional Info

NA
2023-07-04 13:29:55 +00:00
Jimmy Chen
46be05f728 Cache target attester balances for unrealized FFG progression calculation (#4362)
## Issue Addressed

#4118 

## Proposed Changes

This PR introduces a "progressive balances" cache on the `BeaconState`, which keeps track of the accumulated target attestation balance for the current & previous epochs. The cached values are utilised by fork choice to calculate unrealized justification and finalization (instead of converting epoch participation arrays to balances for each block we receive).

This optimization will be rolled out gradually to allow for more testing. A new `--progressive-balances disabled|checked|strict|fast` flag is introduced to support this:
- `checked`: enabled with checks against participation cache, and falls back to the existing epoch processing calculation if there is a total target attester balance mismatch. There is no performance gain from this as the participation cache still needs to be computed. **This is the default mode for now.**
- `strict`: enabled with checks against participation cache, returns error if there is a mismatch. **Used for testing only**.
- `fast`: enabled with no comparative checks and without computing the participation cache. This mode gives us the performance gains from the optimization. This is still experimental and not currently recommended for production usage, but will become the default mode in a future release.
- `disabled`: disable the usage of progressive cache, and use the existing method for FFG progression calculation. This mode may be useful if we find a bug and want to stop the frequent error logs.

### Tasks

- [x] Initial cache implementation in `BeaconState`
- [x] Perform checks in fork choice to compare the progressive balances cache against results from `ParticipationCache`
- [x] Add CLI flag, and disable the optimization by default
- [x] Testing on Goerli & Benchmarking
- [x]  Move caching logic from state processing to the `ProgressiveBalancesCache` (see [this comment](https://github.com/sigp/lighthouse/pull/4362#discussion_r1230877001))
- [x] Add attesting balance metrics



Co-authored-by: Jimmy Chen <jimmy@sigmaprime.io>
2023-06-30 01:13:06 +00:00
Eitan Seri-Levi
826e090f50 Update node health endpoint (#4310)
## Issue Addressed

[#4292](https://github.com/sigp/lighthouse/issues/4292)

## Proposed Changes

Updated the node health endpoint

will return a 200 status code if  `!syncing && !el_offline && !optimistic`

wil return a 206 if `(syncing || optimistic) &&  !el_offline`

will return a 503 if `el_offline`



## Additional Info
2023-06-30 01:13:04 +00:00
Eitan Seri-Levi
edd093293a added debounce to log (#4269)
## Issue Addressed

[#4259](https://github.com/sigp/lighthouse/issues/4259)

## Proposed Changes

debounce spammy `Unable to send message to the beacon processor` log messages

## Additional Info

We could potentially debounce other logs that have the potential to be "spammy". 

After some feedback we decided to additionally add the following change:

create a newtype wrapper around `mpsc::Sender<BeaconWorkEvent<T>>`. When there is an error on the try_send method on the wrapper, we increase a counter metric with one label per work type.
2023-06-30 01:13:03 +00:00
realbigsean
adbb62f7f3
Devnet6 (#4404)
* some blob reprocessing work

* remove ForceBlockLookup

* reorder enum match arms in sync manager

* a lot more reprocessing work

* impl logic for triggerng blob lookups along with block lookups

* deal with rpc blobs in groups per block in the da checker. don't cache missing blob ids in the da checker.

* make single block lookup generic

* more work

* add delayed processing logic and combine some requests

* start fixing some compile errors

* fix compilation in main block lookup mod

* much work

* get things compiling

* parent blob lookups

* fix compile

* revert red/stevie changes

* fix up sync manager delay message logic

* add peer usefulness enum

* should remove lookup refactor

* consolidate retry error handling

* improve peer scoring during certain failures in parent lookups

* improve retry code

* drop parent lookup if either req has a peer disconnect during download

* refactor single block processed method

* processing peer refactor

* smol bugfix

* fix some todos

* fix lints

* fix lints

* fix compile in lookup tests

* fix lints

* fix lints

* fix existing block lookup tests

* renamings

* fix after merge

* cargo fmt

* compilation fix in beacon chain tests

* fix

* refactor lookup tests to work with multiple forks and response types

* make tests into macros

* wrap availability check error

* fix compile after merge

* add random blobs

* start fixing up lookup verify error handling

* some bug fixes and the start of deneb only tests

* make tests work for all forks

* track information about peer source

* error refactoring

* improve peer scoring

* fix test compilation

* make sure blobs are sent for processing after stream termination, delete copied tests

* add some tests and fix a bug

* smol bugfixes and moar tests

* add tests and fix some things

* compile after merge

* lots of refactoring

* retry on invalid block/blob

* merge unknown parent messages before current slot lookup

* get tests compiling

* penalize blob peer on invalid blobs

* Check disk on in-memory cache miss

* Update beacon_node/beacon_chain/src/data_availability_checker/overflow_lru_cache.rs

* Update beacon_node/network/src/sync/network_context.rs

Co-authored-by: Divma <26765164+divagant-martian@users.noreply.github.com>

* fix bug in matching blocks and blobs in range sync

* pr feedback

* fix conflicts

* upgrade logs from warn to crit when we receive incorrect response in range

* synced_and_connected_within_tolerance -> should_search_for_block

* remove todo

* add data gas used and update excess data gas to u64

* Fix Broken Overflow Tests

* payload verification with commitments

* fix merge conflicts

* restore payload file

* Restore payload file

* remove todo

* add max blob commitments per block

* c-kzg lib update

* Fix ef tests

* Abstract over minimal/mainnet spec in kzg crate

* Start integrating new KZG

* checkpoint sync without alignment

* checkpoint sync without alignment

* add import

* add import

* query for checkpoint state by slot rather than state root (teku doesn't serve by state root)

* query for checkpoint state by slot rather than state root (teku doesn't serve by state root)

* loosen check

* get state first and query by most recent block root

* Revert "loosen check"

This reverts commit 069d13dd63aa794a3505db9f17bd1a6b73f0be81.

* get state first and query by most recent block root

* merge max blobs change

* simplify delay logic

* rename unknown parent sync message variants

* rename parameter, block_slot -> slot

* add some docs to the lookup module

* use interval instead of sleep

* drop request if blocks and blobs requests both return `None` for `Id`

* clean up `find_single_lookup` logic

* add lookup source enum

* clean up `find_single_lookup` logic

* add docs to find_single_lookup_request

* move LookupSource our of param where unnecessary

* remove unnecessary todo

* query for block by `state.latest_block_header.slot`

* fix lint

* fix merge transition ef tests

* fix test

* fix test

* fix observed  blob sidecars test

* Add some metrics (#33)

* fix protocol limits for blobs by root

* Update Engine API for 1:1 Structure Method

* make beacon chain tests to fix devnet 6 changes

* get ckzg working and fix some tests

* fix remaining tests

* fix lints

* Fix KZG linking issues

* remove unused dep

* lockfile

* test fixes

* remove dbgs

* remove unwrap

* cleanup tx generator

* small fixes

* fixing fixes

* more self reivew

* more self review

* refactor genesis header initialization

* refactor mock el instantiations

* fix compile

* fix network test, make sure they run for each fork

* pr feedback

* fix last test (hopefully)

---------

Co-authored-by: Pawan Dhananjay <pawandhananjay@gmail.com>
Co-authored-by: Mark Mackey <mark@sigmaprime.io>
Co-authored-by: Divma <26765164+divagant-martian@users.noreply.github.com>
Co-authored-by: Michael Sproul <michael@sigmaprime.io>
2023-06-29 15:35:43 -04:00
Jack McPherson
1aff082eea Add broadcast validation routes to Beacon Node HTTP API (#4316)
## Issue Addressed

 - #4293 
 - #4264 

## Proposed Changes

*Changes largely follow those suggested in the main issue*.

 - Add new routes to HTTP API
   - `post_beacon_blocks_v2`
   - `post_blinded_beacon_blocks_v2`
 - Add new routes to `BeaconNodeHttpClient`
   - `post_beacon_blocks_v2`
   - `post_blinded_beacon_blocks_v2`
 - Define new Eth2 common types
   - `BroadcastValidation`, enum representing the level of validation to apply to blocks prior to broadcast
   - `BroadcastValidationQuery`, the corresponding HTTP query string type for the above type
 - ~~Define `_checked` variants of both `publish_block` and `publish_blinded_block` that enforce a validation level at a type level~~
 - Add interactive tests to the `bn_http_api_tests` test target covering each validation level (to their own test module, `broadcast_validation_tests`)
   - `beacon/blocks`
       - `broadcast_validation=gossip`
         - Invalid (400)
         - Full Pass (200)
         - Partial Pass (202)
        - `broadcast_validation=consensus`
          - Invalid (400)
          - Only gossip (400)
          - Only consensus pass (i.e., equivocates) (200)
          - Full pass (200)
        - `broadcast_validation=consensus_and_equivocation`
          - Invalid (400)
          - Invalid due to early equivocation (400)
          - Only gossip (400)
          - Only consensus (400)
          - Pass (200)
   - `beacon/blinded_blocks`
       - `broadcast_validation=gossip`
         - Invalid (400)
         - Full Pass (200)
         - Partial Pass (202)
        - `broadcast_validation=consensus`
          - Invalid (400)
          - Only gossip (400)
          - ~~Only consensus pass (i.e., equivocates) (200)~~
          - Full pass (200)
        - `broadcast_validation=consensus_and_equivocation`
          - Invalid (400)
          - Invalid due to early equivocation (400)
          - Only gossip (400)
          - Only consensus (400)
          - Pass (200)
 - Add a new trait, `IntoGossipVerifiedBlock`, which allows type-level guarantees to be made as to gossip validity
 - Modify the structure of the `ObservedBlockProducers` cache from a `(slot, validator_index)` mapping to a `((slot, validator_index), block_root)` mapping
 - Modify `ObservedBlockProducers::proposer_has_been_observed` to return a `SeenBlock` rather than a boolean on success
 - Punish gossip peer (low) for submitting equivocating blocks
 - Rename `BlockError::SlashablePublish` to `BlockError::SlashableProposal`

## Additional Info

This PR contains changes that directly modify how blocks are verified within the client. For more context, consult [comments in-thread](https://github.com/sigp/lighthouse/pull/4316#discussion_r1234724202).


Co-authored-by: Michael Sproul <michael@sigmaprime.io>
2023-06-29 12:02:38 +00:00
int88
23b06aa51e avoid relocking head during builder health check (#4323)
## Issue Addressed

#4314 

## Proposed Changes

avoid relocking head during builder health check

## Additional Info

NA
2023-06-29 09:39:15 +00:00
Jimmy Chen
5b85aeca5f
Add BlobSidecar encode & decode test and fix RpcLimit for BlobsByRoot 2023-06-28 22:42:30 +10:00
Jimmy Chen
03a17a84da
Update handle_rpc_response blobs match arms to be consistent with block v2 protocols. 2023-06-28 16:56:52 +10:00
Jimmy Chen
68140fa036
Update max block request limit to MAX_REQUEST_BLOCKS_DENEB to ensure this doesn't cause incompatibilities with other clients. 2023-06-28 16:46:20 +10:00
Jimmy Chen
5c4485e45e
Merge branch 'deneb-merge-from-unstable-20230627' of github.com:jimmygchen/lighthouse into deneb-merge-from-unstable-20230627 2023-06-28 16:26:38 +10:00
Jimmy Chen
d1146ec8b5
Sync finalized sync to 2 epochs + 1 slot past our peer's finalized slot in order to finalize the chain locally 2023-06-28 16:15:37 +10:00
Jimmy Chen
56caccbac0
Added a few fixes from merge 2023-06-27 17:48:50 +10:00
Jimmy Chen
cc03ba430c
Merge branch 'unstable' into deneb-merge-from-unstable-20230627
# Conflicts:
#	Cargo.lock
#	common/eth2_network_config/built_in_network_configs/gnosis/config.yaml
2023-06-27 15:30:44 +10:00
Jimmy Chen
d062f61125
Fix failing tests after merge 2023-06-27 15:27:42 +10:00
Paul Hauner
9072acbfa6 Tidy formatting of Reqwest errors (#4336)
## Issue Addressed

NA

## Proposed Changes

Implements the `PrettyReqwestError` to wrap a `reqwest::Error` and give nicer `Debug` formatting. It also wraps the `Url` component in a `SensitiveUrl` to avoid leaking sensitive info in logs.

### Before

```
Reqwest(reqwest::Error { kind: Request, url: Url { scheme: "http", cannot_be_a_base: false, username: "", password: None, host: Some(Domain("localhost")), port: Some(9999), path: "/eth/v1/node/version", query: None, fragment: None }, source: hyper::Error(Connect, ConnectError("tcp connect error", Os { code: 61, kind: ConnectionRefused, message: "Connection refused" })) })
```

### After

```
HttpClient(url: http://localhost:9999/, kind: request, detail: error trying to connect: tcp connect error: Connection refused (os error 61))
```

## Additional Info

I've also renamed the `Reqwest` error enum variants to `HttpClient`, to give people a better chance at knowing what's going on. Reqwest is pretty odd and looks like a typo.

I've implemented it in the `eth2` and `execution_layer` crates. This should affect most logs in the VC and EE-related ones in the BN.

I think the last crate that could benefit from the is the `beacon_node/eth1` crate. I haven't updated it in this PR since its error type is not so amenable to it (everything goes into a `String`). I don't have a whole lot of time to jig around with that at the moment and I feel that this PR as it stands is a significant enough improvement to merge on its own. Leaving it as-is is fine for the time being and we can always come back for it later (or implement in-protocol deposits!).
2023-06-27 01:06:50 +00:00
Pawan Dhananjay
448d3ec9b3 Aggregate subsets (#3493)
## Issue Addressed

Resolves #3238 

## Proposed Changes

Please list or describe the changes introduced by this PR.

## Additional Info

Please provide any additional information. For example, future considerations
or information useful for reviewers.
2023-06-27 01:06:49 +00:00
Jimmy Chen
97c4660761
Merge branch 'unstable' into deneb-merge-from-unstable-20230627
# Conflicts:
#	beacon_node/beacon_chain/src/beacon_chain.rs
#	beacon_node/beacon_chain/src/block_verification.rs
#	beacon_node/beacon_chain/src/lib.rs
#	beacon_node/beacon_chain/src/test_utils.rs
#	beacon_node/beacon_chain/tests/block_verification.rs
#	beacon_node/beacon_chain/tests/store_tests.rs
#	beacon_node/beacon_chain/tests/tests.rs
#	beacon_node/http_api/src/publish_blocks.rs
#	beacon_node/lighthouse_network/src/rpc/codec/ssz_snappy.rs
#	beacon_node/lighthouse_network/src/rpc/methods.rs
#	beacon_node/lighthouse_network/src/rpc/outbound.rs
#	beacon_node/lighthouse_network/src/rpc/protocol.rs
#	beacon_node/lighthouse_network/src/service/api_types.rs
#	beacon_node/network/src/beacon_processor/worker/gossip_methods.rs
#	beacon_node/network/src/beacon_processor/worker/rpc_methods.rs
#	beacon_node/network/src/beacon_processor/worker/sync_methods.rs
#	beacon_node/network/src/sync/block_lookups/single_block_lookup.rs
#	beacon_node/network/src/sync/network_context.rs
#	beacon_node/network/src/sync/range_sync/batch.rs
#	beacon_node/network/src/sync/range_sync/chain.rs
#	common/eth2/src/types.rs
#	consensus/fork_choice/src/fork_choice.rs
2023-06-27 08:40:24 +10:00
Mac L
c76afc6630 Remove legacy max-skip-slots checks (#4403)
## Proposed Changes

Remove `max-skip-slots` checks when processing blocks.
This was legacy code which was previously used in the Medalla testnet to sync to the correct fork.
With the addition of checkpoint sync which allows us to sync to any arbitrary fork, this is no longer a necessary feature, so it has been removed for simplicity.

## Additional Notes
The CLI flag and checks for attestation processing have been retained as it still may have uses in DoS protection.
2023-06-20 05:20:36 +00:00