fix: ensure consistent network ID usage in P2P subscriber (#2884)

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closes #1020

align usage of network info

Author: tac0turtle

pkg/sync/sync_service.go

@@ -252,13 +252,18 @@ func (syncService *SyncService[H]) initStore(ctx context.Context, initial H) (bo
 // but does not start the Subscriber. Returns peer IDs for later use.
 func (syncService *SyncService[H]) setupP2PInfrastructure(ctx context.Context) ([]peer.ID, error) {
 	ps := syncService.p2p.PubSub()
-	var err error
+
+	_, _, chainID, err := syncService.p2p.Info()
+	if err != nil {
+		return nil, fmt.Errorf("error while fetching the network: %w", err)
+	}
+	networkID := syncService.getNetworkID(chainID)
 
 	// Create subscriber but DON'T start it yet
 	syncService.sub, err = goheaderp2p.NewSubscriber[H](
 		ps,
 		pubsub.DefaultMsgIdFn,
-		goheaderp2p.WithSubscriberNetworkID(syncService.getChainID()),
+		goheaderp2p.WithSubscriberNetworkID(networkID),
 		goheaderp2p.WithSubscriberMetrics(),
 	)
 	if err != nil {
@@ -269,12 +274,6 @@ func (syncService *SyncService[H]) setupP2PInfrastructure(ctx context.Context) (
 		return nil, fmt.Errorf("error while starting store: %w", err)
 	}
 
-	_, _, network, err := syncService.p2p.Info()
-	if err != nil {
-		return nil, fmt.Errorf("error while fetching the network: %w", err)
-	}
-	networkID := syncService.getNetworkID(network)
-
 	if syncService.p2pServer, err = newP2PServer(syncService.p2p.Host(), syncService.store, networkID); err != nil {
 		return nil, fmt.Errorf("error while creating p2p server: %w", err)
 	}
@@ -446,10 +445,6 @@ func (syncService *SyncService[H]) getNetworkID(network string) string {
 	return network + "-" + string(syncService.syncType)
 }
 
-func (syncService *SyncService[H]) getChainID() string {
-	return syncService.genesis.ChainID + "-" + string(syncService.syncType)
-}
-
 func (syncService *SyncService[H]) getPeerIDs() []peer.ID {
 	peerIDs := syncService.p2p.PeerIDs()
 	if !syncService.conf.Node.Aggregator {