handle no blobs from peers instead of empty blobs in range requests

beacon_node/network/src/sync/mod.rs

@@ -3,6 +3,7 @@
 //! Stores the various syncing methods for the beacon chain.
 mod backfill_sync;
 mod block_lookups;
+mod block_sidecar_coupling;
 pub mod manager;
 mod network_context;
 mod peer_sync_info;