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Move the BeaconProcessor into a new crate (#4435)

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*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.
This commit is contained in:
Paul Hauner
2023-07-10 07:45:54 +00:00
parent ea2420d193
commit c25825a539
28 changed files with 1743 additions and 1674 deletions
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6
beacon_node/network/Cargo.toml
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@@ -11,7 +11,6 @@ matches = "0.1.8"
exit-future = "0.2.0"
slog-term = "2.6.0"
slog-async = "2.5.0"
environment = { path = "../../lighthouse/environment" }
[dependencies]
beacon_chain = { path = "../beacon_chain" }
@@ -46,4 +45,7 @@ derivative = "2.2.0"
delay_map = "0.3.0"
ethereum-types = { version = "0.14.1", optional = true }
operation_pool = { path = "../operation_pool" }
execution_layer = { path = "../execution_layer" }
execution_layer = { path = "../execution_layer" }
beacon_processor = { path = "../beacon_processor" }
parking_lot = "0.12.0"
environment = { path = "../../lighthouse/environment" }