Try to fix snap sync.

Author: mpaulucci

crates/networking/p2p/sync_manager.rs

@@ -97,7 +97,7 @@ impl SyncManager {
     }
 
     /// Updates the last fcu head. This may be used on the next sync cycle if needed
-    fn set_head(&self, fcu_head: H256) {
+    pub fn set_head(&self, fcu_head: H256) {
         if let Ok(mut latest_fcu_head) = self.last_fcu_head.try_lock() {
             *latest_fcu_head = fcu_head;
         } else {
@@ -106,7 +106,7 @@ impl SyncManager {
     }
 
     /// Returns true is the syncer is active
-    fn is_active(&self) -> bool {
+    pub fn is_active(&self) -> bool {
         self.syncer.try_lock().is_err()
     }
 

crates/networking/rpc/engine/fork_choice.rs

@@ -210,10 +210,8 @@ async fn handle_forkchoice(
         ));
     }
 
-    if context.syncer.sync_mode() == SyncMode::Snap {
-        context
-            .syncer
-            .sync_to_head(fork_choice_state.head_block_hash);
+    if context.syncer.sync_mode() == SyncMode::Snap && context.syncer.is_active() {
+        context.syncer.set_head(fork_choice_state.head_block_hash);
         return Ok((None, PayloadStatus::syncing().into()));
     }