Use the mesh_n value from NetworkLoad for PeerScoreSettings (#5013)

* Build `gs_config` and use the `mesh_n` config for `PeerScoreSettings`

* Remove unused imports

* Merge branch 'unstable' into peer-score-settings

# Conflicts:
#	beacon_node/lighthouse_network/src/config.rs
#	beacon_node/lighthouse_network/src/service/gossipsub_scoring_parameters.rs
#	beacon_node/lighthouse_network/src/service/mod.rs

beacon_node/lighthouse_network/src/config.rs

@@ -69,10 +69,6 @@ pub struct Config {
     /// Target number of connected peers.
     pub target_peers: usize,
 
-    /// Gossipsub configuration parameters.
-    #[serde(skip)]
-    pub gs_config: gossipsub::Config,
-
     /// Discv5 configuration parameters.
     #[serde(skip)]
     pub discv5_config: discv5::Config,
@@ -278,12 +274,6 @@ impl Default for Config {
             .join(DEFAULT_BEACON_NODE_DIR)
             .join(DEFAULT_NETWORK_DIR);
 
-        // Note: Using the default config here. Use `gossipsub_config` function for getting
-        // Lighthouse specific configuration for gossipsub.
-        let gs_config = gossipsub::ConfigBuilder::default()
-            .build()
-            .expect("valid gossipsub configuration");
-
         // Discv5 Unsolicited Packet Rate Limiter
         let filter_rate_limiter = Some(
             discv5::RateLimiterBuilder::new()
@@ -336,7 +326,6 @@ impl Default for Config {
             enr_quic6_port: None,
             enr_tcp6_port: None,
             target_peers: 100,
-            gs_config,
             discv5_config,
             boot_nodes_enr: vec![],
             boot_nodes_multiaddr: vec![],

beacon_node/lighthouse_network/src/service/gossipsub_scoring_parameters.rs

@@ -1,9 +1,6 @@
 use crate::types::{GossipEncoding, GossipKind, GossipTopic};
 use crate::{error, TopicHash};
-use gossipsub::{
-    Config as GossipsubConfig, IdentTopic as Topic, PeerScoreParams, PeerScoreThresholds,
-    TopicScoreParams,
-};
+use gossipsub::{IdentTopic as Topic, PeerScoreParams, PeerScoreThresholds, TopicScoreParams};
 use std::cmp::max;
 use std::collections::HashMap;
 use std::marker::PhantomData;
@@ -54,7 +51,7 @@ pub struct PeerScoreSettings<E: EthSpec> {
 }
 
 impl<E: EthSpec> PeerScoreSettings<E> {
-    pub fn new(chain_spec: &ChainSpec, gs_config: &GossipsubConfig) -> PeerScoreSettings<E> {
+    pub fn new(chain_spec: &ChainSpec, mesh_n: usize) -> PeerScoreSettings<E> {
         let slot = Duration::from_secs(chain_spec.seconds_per_slot);
         let beacon_attestation_subnet_weight = 1.0 / chain_spec.attestation_subnet_count as f64;
         let max_positive_score = (MAX_IN_MESH_SCORE + MAX_FIRST_MESSAGE_DELIVERIES_SCORE)
@@ -72,7 +69,7 @@ impl<E: EthSpec> PeerScoreSettings<E> {
             max_positive_score,
             decay_interval: max(Duration::from_secs(1), slot),
             decay_to_zero: 0.01,
-            mesh_n: gs_config.mesh_n(),
+            mesh_n,
             max_committees_per_slot: chain_spec.max_committees_per_slot,
             target_committee_size: chain_spec.target_committee_size,
             target_aggregators_per_committee: chain_spec.target_aggregators_per_committee as usize,

beacon_node/lighthouse_network/src/service/mod.rs

@@ -140,7 +140,7 @@ impl<AppReqId: ReqId, E: EthSpec> Network<AppReqId, E> {
     ) -> error::Result<(Self, Arc<NetworkGlobals<E>>)> {
         let log = log.new(o!("service"=> "libp2p"));
 
-        let mut config = ctx.config.clone();
+        let config = ctx.config.clone();
         trace!(log, "Libp2p Service starting");
         // initialise the node's ID
         let local_keypair = utils::load_private_key(&config, &log);
@@ -180,7 +180,19 @@ impl<AppReqId: ReqId, E: EthSpec> Network<AppReqId, E> {
             .eth2()
             .expect("Local ENR must have a fork id");
 
-        let score_settings = PeerScoreSettings::new(ctx.chain_spec, &config.gs_config);
+        let gossipsub_config_params = GossipsubConfigParams {
+            message_domain_valid_snappy: ctx.chain_spec.message_domain_valid_snappy,
+            gossip_max_size: ctx.chain_spec.gossip_max_size as usize,
+        };
+        let gs_config = gossipsub_config(
+            config.network_load,
+            ctx.fork_context.clone(),
+            gossipsub_config_params,
+            ctx.chain_spec.seconds_per_slot,
+            E::slots_per_epoch(),
+        );
+
+        let score_settings = PeerScoreSettings::new(ctx.chain_spec, gs_config.mesh_n());
 
         let gossip_cache = {
             let slot_duration = std::time::Duration::from_secs(ctx.chain_spec.seconds_per_slot);
@@ -248,18 +260,6 @@ impl<AppReqId: ReqId, E: EthSpec> Network<AppReqId, E> {
                 max_subscriptions_per_request: max_topics * 2,
             };
 
-            let gossipsub_config_params = GossipsubConfigParams {
-                message_domain_valid_snappy: ctx.chain_spec.message_domain_valid_snappy,
-                gossip_max_size: ctx.chain_spec.gossip_max_size as usize,
-            };
-            config.gs_config = gossipsub_config(
-                config.network_load,
-                ctx.fork_context.clone(),
-                gossipsub_config_params,
-                ctx.chain_spec.seconds_per_slot,
-                E::slots_per_epoch(),
-            );
-
             // If metrics are enabled for libp2p build the configuration
             let gossipsub_metrics = ctx.libp2p_registry.as_mut().map(|registry| {
                 (
@@ -268,10 +268,10 @@ impl<AppReqId: ReqId, E: EthSpec> Network<AppReqId, E> {
                 )
             });
 
-            let snappy_transform = SnappyTransform::new(config.gs_config.max_transmit_size());
+            let snappy_transform = SnappyTransform::new(gs_config.max_transmit_size());
             let mut gossipsub = Gossipsub::new_with_subscription_filter_and_transform(
                 MessageAuthenticity::Anonymous,
-                config.gs_config.clone(),
+                gs_config.clone(),
                 gossipsub_metrics,
                 filter,
                 snappy_transform,