Delay instead of rejecting blob sidecars if there is too many empty s…

…lots for state cache to process

fork_choice_store/src/store.rs

@@ -68,6 +68,7 @@ use crate::{
     store_config::StoreConfig,
     supersets::MultiPhaseAggregateAndProofSets as AggregateAndProofSupersets,
     validations::validate_merge_block,
+    StateCacheError,
 };
 
 /// [`Store`] from the Fork Choice specification.
@@ -1756,7 +1757,16 @@ impl<P: Preset> Store<P> {
             return Ok(BlobSidecarAction::Ignore(true));
         }
 
-        let state = state_fn()?;
+        let state = match state_fn() {
+            Ok(state) => state,
+            Err(error) => {
+                if let Some(StateCacheError::StateFarBehind { .. }) = error.downcast_ref() {
+                    return Ok(BlobSidecarAction::DelayUntilSlot(blob_sidecar));
+                }
+
+                bail!(error);
+            }
+        };
 
         // [REJECT] The proposer signature of blob_sidecar.signed_block_header, is valid with respect to the block_header.proposer_index pubkey.
         SingleVerifier.verify_singular(