Update libp2p gossip topic parameters. (#6979)

* Update gossip topic parameters.

* Fix nimbus_light_client build.

* Update copyright years.

Author: cheatfate

beacon_chain/light_client.nim

@@ -1,5 +1,5 @@
 # beacon_chain
-# Copyright (c) 2022-2024 Status Research & Development GmbH
+# Copyright (c) 2022-2025 Status Research & Development GmbH
 # Licensed and distributed under either of
 #   * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
 #   * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
@@ -434,10 +434,8 @@ proc updateGossipStatus*(
     if gossipFork >= ConsensusFork.Altair:
       let forkDigest = lightClient.forkDigests[].atConsensusFork(gossipFork)
       lightClient.network.subscribe(
-        getLightClientFinalityUpdateTopic(forkDigest),
-        basicParams)
+        getLightClientFinalityUpdateTopic(forkDigest), basicParams())
       lightClient.network.subscribe(
-        getLightClientOptimisticUpdateTopic(forkDigest),
-        basicParams)
+        getLightClientOptimisticUpdateTopic(forkDigest), basicParams())
 
   lightClient.gossipState = targetGossipState

beacon_chain/networking/eth2_network.nim

@@ -2635,15 +2635,13 @@ proc broadcast(node: Eth2Node, topic: string, msg: auto):
   broadcast(node, topic, gossipEncode(msg))
 
 proc subscribeAttestationSubnets*(
-    node: Eth2Node, subnets: AttnetBits, forkDigest: ForkDigest) =
+    node: Eth2Node, subnets: AttnetBits, forkDigest: ForkDigest,
+    topicParams: TopicParams) =
   # https://github.com/ethereum/consensus-specs/blob/v1.5.0-beta.0/specs/phase0/p2p-interface.md#attestations-and-aggregation
-  # Nimbus won't score attestation subnets for now, we just rely on block and
-  # aggregate which are more stable and reliable
-
   for subnet_id, enabled in subnets:
     if enabled:
       node.subscribe(getAttestationTopic(
-        forkDigest, SubnetId(subnet_id)), TopicParams.init()) # don't score attestation subnets for now
+        forkDigest, SubnetId(subnet_id)), topicParams)
 
 proc unsubscribeAttestationSubnets*(
     node: Eth2Node, subnets: AttnetBits, forkDigest: ForkDigest) =