diff --git a/internal/client/network-gossip/bridge.go b/internal/client/network-gossip/bridge.go
index 7c951d4d1c..7504a72ab6 100644
--- a/internal/client/network-gossip/bridge.go
+++ b/internal/client/network-gossip/bridge.go
@@ -1,3 +1,6 @@
+// Copyright 2025 ChainSafe Systems (ON)
+// SPDX-License-Identifier: LGPL-3.0-only
+
 package gossip
 
 import (
@@ -19,8 +22,8 @@ var logger = log.NewFromGlobal(log.AddContext("pkg", "client/network-gossip"))
 // In the scenario where messages have been received from the network but a subscribed message sink is not ready to
 // receiver, we delay 10 ms and will remove the channel from the sinks if the message is not consumed by the end of
 // the delay. To model this process a gossip engine can be in two forwarding states: idle, and busy.
-
-// GossipEngine utilizes and implementation of [Network] and provides gossiping capabilities on
+//
+// GossipEngine utilises and implementation of [Network] and provides gossiping capabilities on
 // top of it.
 type GossipEngine[H runtime.Hash, N runtime.Number, Hasher runtime.Hasher[H]] struct {
 	stateMachine                consensusGossip[H, Hasher]
@@ -65,7 +68,12 @@ func NewGossipEngine[H runtime.Hash, N runtime.Number, Hasher runtime.Hasher[H]]
 	validator Validator[H],
 ) GossipEngine[H, N, Hasher] {
 	ge := newGossipEngine[H, N, Hasher](network, sync, notificationService, protocol, validator)
-	go ge.poll()
+	go func() {
+		err := ge.poll()
+		if err != nil {
+			panic(err)
+		}
+	}()
 	return ge
 }
 
@@ -163,7 +171,7 @@ func (ge *GossipEngine[H, N, Hasher]) Announce(block H, associatedData []byte) {
 	ge.sync.AnnounceBlock(block, associatedData)
 }
 
-func (ge *GossipEngine[H, N, Hasher]) poll() error {
+func (ge *GossipEngine[H, N, Hasher]) poll() error { //nolint: gocyclo
 	var nextNotificationEvent <-chan service.NotificationEvent
 	// outer:
 	for {
@@ -197,7 +205,8 @@ func (ge *GossipEngine[H, N, Hasher]) poll() error {
 				case service.NotificationEventNotificationStreamClosed:
 					ge.stateMachine.PeerDisconnected(ge.notificationService, event.Peer)
 				case service.NotificationEventNotificationReceived:
-					toForward := ge.stateMachine.OnIncoming(ge.network, ge.notificationService, event.Peer, [][]byte{event.Notification})
+					toForward := ge.stateMachine.OnIncoming(
+						ge.network, ge.notificationService, event.Peer, [][]byte{event.Notification})
 					ge.forwardingState = forwardingStateBusy[H](toForward)
 				default:
 					panic("unreachable")
diff --git a/internal/client/network-gossip/bridge_test.go b/internal/client/network-gossip/bridge_test.go
index 86e68e1451..635e3bf554 100644
--- a/internal/client/network-gossip/bridge_test.go
+++ b/internal/client/network-gossip/bridge_test.go
@@ -1,3 +1,6 @@
+// Copyright 2025 ChainSafe Systems (ON)
+// SPDX-License-Identifier: LGPL-3.0-only
+
 package gossip
 
 import (
@@ -144,7 +147,9 @@ func (ao TestValidator) NewPeer(context ValidatorContext[hash.H256], who peerid.
 }
 func (ao TestValidator) PeerDisconnected(context ValidatorContext[hash.H256], who peerid.PeerID) {
 }
-func (ao TestValidator) Validate(context ValidatorContext[hash.H256], sender peerid.PeerID, data []byte) ValidationResult {
+func (ao TestValidator) Validate(
+	context ValidatorContext[hash.H256], sender peerid.PeerID, data []byte,
+) ValidationResult {
 	return ValidationResultProcessAndKeep[hash.H256]{
 		Hash: hash.H256(data[0:32]),
 	}
@@ -154,7 +159,9 @@ func (ao TestValidator) MessageExpired() func(topic hash.H256, message []byte) b
 		return false
 	}
 }
-func (ao TestValidator) MessageAllowed() func(who peerid.PeerID, intent MessageIntent, topic hash.H256, data []byte) bool {
+func (ao TestValidator) MessageAllowed() func(
+	who peerid.PeerID, intent MessageIntent, topic hash.H256, data []byte,
+) bool {
 	return func(who peerid.PeerID, intent MessageIntent, topic hash.H256, data []byte) bool {
 		return true
 	}
@@ -296,7 +303,8 @@ func TestGossipEngine(t *testing.T) {
 				if !ok {
 					gossipEngine.messageSinks[topicChan.Topic] = make([]chan TopicNotification, 0)
 				}
-				gossipEngine.messageSinks[topicChan.Topic] = append(gossipEngine.messageSinks[topicChan.Topic], topicChan.Chan)
+				gossipEngine.messageSinks[topicChan.Topic] = append(
+					gossipEngine.messageSinks[topicChan.Topic], topicChan.Chan)
 			}
 
 			// Register the remote peer.
diff --git a/internal/client/network-gossip/network_gossip.go b/internal/client/network-gossip/network_gossip.go
index ea0c48134c..d550bdf0e2 100644
--- a/internal/client/network-gossip/network_gossip.go
+++ b/internal/client/network-gossip/network_gossip.go
@@ -1,3 +1,6 @@
+// Copyright 2025 ChainSafe Systems (ON)
+// SPDX-License-Identifier: LGPL-3.0-only
+
 package gossip
 
 import (
diff --git a/internal/client/network-gossip/state_machine.go b/internal/client/network-gossip/state_machine.go
index 092c596e4f..08d2e935db 100644
--- a/internal/client/network-gossip/state_machine.go
+++ b/internal/client/network-gossip/state_machine.go
@@ -1,3 +1,6 @@
+// Copyright 2025 ChainSafe Systems (ON)
+// SPDX-License-Identifier: LGPL-3.0-only
+
 package gossip
 
 import (
@@ -137,7 +140,10 @@ func (h hasher[K]) Hash(key K) uint32 {
 }
 
 // Create a new instance using the given validator.
-func newConsensusGossip[H runtime.Hash, Hasher runtime.Hasher[H]](validator Validator[H], protocol network.ProtocolName) consensusGossip[H, Hasher] {
+func newConsensusGossip[H runtime.Hash, Hasher runtime.Hasher[H]](
+	validator Validator[H],
+	protocol network.ProtocolName,
+) consensusGossip[H, Hasher] {
 	h := hasher[H]{maphash.NewHasher[H]()}
 	knownMessages, err := freelru.New[H, any](knownMessageCacheSize, h.Hash)
 	if err != nil {
@@ -154,7 +160,11 @@ func newConsensusGossip[H runtime.Hash, Hasher runtime.Hasher[H]](validator Vali
 }
 
 // Handle new connected peer.
-func (cg *consensusGossip[H, Hasher]) NewPeer(notificationService service.NotificationService, who peerid.PeerID, role role.ObservedRole) {
+func (cg *consensusGossip[H, Hasher]) NewPeer(
+	notificationService service.NotificationService,
+	who peerid.PeerID,
+	role role.ObservedRole,
+) {
 	cg.peers[who] = peerConsensus[H]{knownMessages: make(map[H]any)}
 
 	validator := cg.validator
@@ -162,7 +172,9 @@ func (cg *consensusGossip[H, Hasher]) NewPeer(notificationService service.Notifi
 	validator.NewPeer(context, who, role)
 }
 
-func (cg *consensusGossip[H, Hasher]) registerMessageHashed(messageHash H, topic H, message []byte, sender *peerid.PeerID) {
+func (cg *consensusGossip[H, Hasher]) registerMessageHashed(
+	messageHash H, topic H, message []byte, sender *peerid.PeerID,
+) {
 	cg.knownMessages.Add(messageHash, nil)
 	cg.messages = append(cg.messages, messageEntry[H]{
 		messageHash: messageHash,
@@ -182,7 +194,9 @@ func (cg *consensusGossip[H, Hasher]) RegisterMessage(topic H, message []byte) {
 }
 
 // Call when a peer has been disconnected to stop tracking gossip status.
-func (cg *consensusGossip[H, Hasher]) PeerDisconnected(notificationService service.NotificationService, who peerid.PeerID) {
+func (cg *consensusGossip[H, Hasher]) PeerDisconnected(
+	notificationService service.NotificationService, who peerid.PeerID,
+) {
 	validator := cg.validator
 	context := newtorkContext[H, Hasher]{gossip: cg, notificationService: notificationService}
 	validator.PeerDisconnected(context, who)
@@ -205,7 +219,9 @@ func (cg *consensusGossip[H, Hasher]) rebroadcast(notificationService service.No
 }
 
 // Broadcast all messages with given topic.
-func (cg *consensusGossip[H, Hasher]) BroadcastTopic(notificationService service.NotificationService, topic H, force bool) {
+func (cg *consensusGossip[H, Hasher]) BroadcastTopic(
+	notificationService service.NotificationService, topic H, force bool,
+) {
 	var messages []messageEntry[H]
 	for _, entry := range cg.messages {
 		if entry.topic == topic {
@@ -240,7 +256,7 @@ func (cg *consensusGossip[H, Hasher]) CollectGarbage() {
 	// TODO: expired messages metric
 
 	for id, peer := range cg.peers {
-		for h, _ := range peer.knownMessages {
+		for h := range peer.knownMessages {
 			if _, ok := knownMessages.Get(h); !ok {
 				delete(peer.knownMessages, h)
 			}
@@ -335,7 +351,9 @@ func (cg *consensusGossip[H, Hasher]) OnIncoming(
 }
 
 // Send all messages with given topic to a peer.
-func (cg *consensusGossip[H, Hasher]) SendTopic(notificationService service.NotificationService, who peerid.PeerID, topic H, force bool) {
+func (cg *consensusGossip[H, Hasher]) SendTopic(
+	notificationService service.NotificationService, who peerid.PeerID, topic H, force bool,
+) {
 	messageAllowed := cg.validator.MessageAllowed()
 
 	if peer, ok := cg.peers[who]; ok {
@@ -363,7 +381,9 @@ func (cg *consensusGossip[H, Hasher]) SendTopic(notificationService service.Noti
 }
 
 // Multicast a message to all peers.
-func (cg *consensusGossip[H, Hasher]) Multicast(notificationService service.NotificationService, topic H, message []byte, force bool) {
+func (cg *consensusGossip[H, Hasher]) Multicast(
+	notificationService service.NotificationService, topic H, message []byte, force bool,
+) {
 	messageHash := (*new(Hasher)).Hash(message)
 	cg.registerMessageHashed(messageHash, topic, message, nil)
 	var intent MessageIntent = MessageIntentBroadcast
@@ -382,7 +402,9 @@ func (cg *consensusGossip[H, Hasher]) Multicast(notificationService service.Noti
 }
 
 // Send addressed message to a peer. The message is not kept or multicast later on.
-func (cg *consensusGossip[H, Hasher]) SendMessage(notificationService service.NotificationService, who peerid.PeerID, message []byte) {
+func (cg *consensusGossip[H, Hasher]) SendMessage(
+	notificationService service.NotificationService, who peerid.PeerID, message []byte,
+) {
 	peer, ok := cg.peers[who]
 	if !ok {
 		return
diff --git a/internal/client/network-gossip/state_machine_test.go b/internal/client/network-gossip/state_machine_test.go
index d204affb07..6dd27152d1 100644
--- a/internal/client/network-gossip/state_machine_test.go
+++ b/internal/client/network-gossip/state_machine_test.go
@@ -1,3 +1,6 @@
+// Copyright 2025 ChainSafe Systems (ON)
+// SPDX-License-Identifier: LGPL-3.0-only
+
 package gossip
 
 import (
@@ -191,7 +194,9 @@ func (NoOpNotificationService) MessageSink(peer peerid.PeerID) service.MessageSi
 
 var _ service.NotificationService = NoOpNotificationService{}
 
-func pushMessage(consensus *consensusGossip[hash.H256, runtime.BlakeTwo256], topic hash.H256, h hash.H256, message []byte) {
+func pushMessage(
+	consensus *consensusGossip[hash.H256, runtime.BlakeTwo256], topic hash.H256, h hash.H256, message []byte,
+) {
 	consensus.knownMessages.Add(h, nil)
 	consensus.messages = append(consensus.messages, messageEntry[hash.H256]{
 		messageHash: h,
diff --git a/internal/client/network-gossip/validator.go b/internal/client/network-gossip/validator.go
index 9c4eecf670..b1e03c7b1a 100644
--- a/internal/client/network-gossip/validator.go
+++ b/internal/client/network-gossip/validator.go
@@ -1,3 +1,6 @@
+// Copyright 2025 ChainSafe Systems (ON)
+// SPDX-License-Identifier: LGPL-3.0-only
+
 package gossip
 
 import (
diff --git a/internal/client/network/config/config.go b/internal/client/network/config/config.go
index f7d6be95bc..137c3ef373 100644
--- a/internal/client/network/config/config.go
+++ b/internal/client/network/config/config.go
@@ -1,3 +1,6 @@
+// Copyright 2025 ChainSafe Systems (ON)
+// SPDX-License-Identifier: LGPL-3.0-only
+
 package config
 
 import (
diff --git a/internal/client/network/event/event.go b/internal/client/network/event/event.go
index a4516f7d39..0e0dd0dea8 100644
--- a/internal/client/network/event/event.go
+++ b/internal/client/network/event/event.go
@@ -1,3 +1,6 @@
+// Copyright 2025 ChainSafe Systems (ON)
+// SPDX-License-Identifier: LGPL-3.0-only
+
 package event
 
 import (
@@ -26,7 +29,7 @@ type DHTEventValuePut kad.Key
 // DHTEventValuePutFailed means an error has occurred while putting a record into the DHT.
 type DHTEventValuePutFailed kad.Key
 
-// DHTEventStartProvidingFailed means an error occured while registering as a content provider on the DHT.
+// DHTEventStartProvidingFailed means an error occurred while registering as a content provider on the DHT.
 type DHTEventStartProvidingFailed kad.Key
 
 // DHTEventPutRecordRequest means the DHT received a put record request.
diff --git a/internal/client/network/network.go b/internal/client/network/network.go
index 80b2bee261..7396219b43 100644
--- a/internal/client/network/network.go
+++ b/internal/client/network/network.go
@@ -1,3 +1,6 @@
+// Copyright 2025 ChainSafe Systems (ON)
+// SPDX-License-Identifier: LGPL-3.0-only
+
 package network
 
 // The protocol name transmitted on the wire.
diff --git a/internal/client/network/role/role.go b/internal/client/network/role/role.go
index 8c74ac9bbb..0ebeb95145 100644
--- a/internal/client/network/role/role.go
+++ b/internal/client/network/role/role.go
@@ -1,3 +1,6 @@
+// Copyright 2025 ChainSafe Systems (ON)
+// SPDX-License-Identifier: LGPL-3.0-only
+
 package role
 
 // Role that the peer sent to us during the handshake, with the addition of what our local node knows about that peer.
@@ -25,7 +28,7 @@ const (
 	RoleAuthority
 )
 
-// Roles are a bitmask of the roles that a node fulfills.
+// Roles are a bitmask of the roles that a node fulfils.
 type Roles uint8
 
 const (
diff --git a/internal/client/network/service/service.go b/internal/client/network/service/service.go
index 6093d7dbe9..41c8b1172a 100644
--- a/internal/client/network/service/service.go
+++ b/internal/client/network/service/service.go
@@ -1,3 +1,6 @@
+// Copyright 2025 ChainSafe Systems (ON)
+// SPDX-License-Identifier: LGPL-3.0-only
+
 package service
 
 import (
@@ -15,7 +18,7 @@ type NetworkSyncForkRequest[BlockHash, BlockNumber any] interface {
 	//
 	// If the given slice of peers is empty then the underlying implementation
 	// should make a best effort to fetch the block from any peers it is
-	// connected to (NOTE: this assumption will change in the future #3629).
+	// connected to.
 	SetSyncForkRequest(peers []peerid.PeerID, hash BlockHash, number BlockNumber)
 }
 
@@ -201,7 +204,7 @@ type NotificationEventNotificationReceived struct {
 
 func (NotificationEventNotificationReceived) isNotificationEvent() {}
 
-// NotificationService is the notification service. It defines behaviors that both the protocol implementations and
+// NotificationService is the notification service. It defines behaviours that both the protocol implementations and
 // NotificationService can expect from each other.
 //
 // NotificationService can send two different kinds of information to protocol:
@@ -214,7 +217,7 @@ func (NotificationEventNotificationReceived) isNotificationEvent() {}
 // [ValidationResultAccept] or [ValidationResultReject].
 //
 // After the validation result has been received by NotificationService, it prepares the substream for communication by
-// initializing the necessary sinks and emits [NotificationEventNotificationStreamOpened] which informs the protocol
+// initialising the necessary sinks and emits [NotificationEventNotificationStreamOpened] which informs the protocol
 // that the remote peer is ready to receive notifications.
 //
 // Both local and remote peer can close the substream at any time. Local peer can do so by calling CloseSubstream which
@@ -269,7 +272,7 @@ type NotificationService interface {
 // notifications to the remote peer.
 //
 // Use of this API is discouraged as it's not as performant as sending notifications through [NotificationService] due
-// to synchronization required to keep the underlying notification sink up to date with possible sink replacement
+// to synchronisation required to keep the underlying notification sink up to date with possible sink replacement
 // events.
 type MessageSink interface {
 	// Send synchronous notification to the peer associated with this MessageSink.
diff --git a/internal/client/network/sync/sync.go b/internal/client/network/sync/sync.go
index 6c7ab59304..ea001c9f7f 100644
--- a/internal/client/network/sync/sync.go
+++ b/internal/client/network/sync/sync.go
@@ -1,3 +1,6 @@
+// Copyright 2025 ChainSafe Systems (ON)
+// SPDX-License-Identifier: LGPL-3.0-only
+
 package sync
 
 import (
diff --git a/internal/client/network/types/kad/kad.go b/internal/client/network/types/kad/kad.go
index e983cfb025..32472002aa 100644
--- a/internal/client/network/types/kad/kad.go
+++ b/internal/client/network/types/kad/kad.go
@@ -1,3 +1,6 @@
+// Copyright 2025 ChainSafe Systems (ON)
+// SPDX-License-Identifier: LGPL-3.0-only
+
 package kad
 
 import (
diff --git a/internal/client/network/types/multiaddr/multiaddr.go b/internal/client/network/types/multiaddr/multiaddr.go
index 639a3136a8..aa8b800114 100644
--- a/internal/client/network/types/multiaddr/multiaddr.go
+++ b/internal/client/network/types/multiaddr/multiaddr.go
@@ -1,3 +1,6 @@
+// Copyright 2025 ChainSafe Systems (ON)
+// SPDX-License-Identifier: LGPL-3.0-only
+
 package multiaddr
 
 import (
diff --git a/internal/client/network/types/multihash/multihash.go b/internal/client/network/types/multihash/multihash.go
index 06d49c2c45..b1328dfa80 100644
--- a/internal/client/network/types/multihash/multihash.go
+++ b/internal/client/network/types/multihash/multihash.go
@@ -1,3 +1,6 @@
+// Copyright 2025 ChainSafe Systems (ON)
+// SPDX-License-Identifier: LGPL-3.0-only
+
 package multihash
 
 import "github.com/multiformats/go-multihash"
diff --git a/internal/client/network/types/peer-id/peer_id.go b/internal/client/network/types/peer-id/peer_id.go
index 34a4aca092..55330a2c9c 100644
--- a/internal/client/network/types/peer-id/peer_id.go
+++ b/internal/client/network/types/peer-id/peer_id.go
@@ -1,3 +1,6 @@
+// Copyright 2025 ChainSafe Systems (ON)
+// SPDX-License-Identifier: LGPL-3.0-only
+
 package peerid
 
 import (
@@ -80,7 +83,7 @@ func NewRandomPeerID() PeerID {
 	}
 }
 
-// Create a [PeerID] parsed from bytes.
+// NewPeerID creates a [PeerID] parsed from bytes.
 func NewPeerID(data []byte) (PeerID, error) {
 	peerID, err := peer.IDFromBytes(data)
 	if err != nil {
diff --git a/internal/client/network/types/peer-id/peer_id_test.go b/internal/client/network/types/peer-id/peer_id_test.go
index 1702562bfb..e2d6fa7d5f 100644
--- a/internal/client/network/types/peer-id/peer_id_test.go
+++ b/internal/client/network/types/peer-id/peer_id_test.go
@@ -1,3 +1,6 @@
+// Copyright 2025 ChainSafe Systems (ON)
+// SPDX-License-Identifier: LGPL-3.0-only
+
 package peerid
 
 import (