feat(chain-state): notify about new safe/finalized only if modified

crates/chain-state/src/chain_info.rs

@@ -112,15 +112,25 @@ impl ChainInfoTracker {
 
     /// Sets the safe header of the chain.
     pub fn set_safe(&self, header: SealedHeader) {
-        self.inner.safe_block.send_modify(|h| {
-            let _ = h.replace(header);
+        self.inner.safe_block.send_if_modified(|current_header| {
+            if current_header.as_ref() != Some(&header) {
+                let _ = current_header.replace(header);
+                return true
+            }
+
+            false
         });
     }
 
     /// Sets the finalized header of the chain.
     pub fn set_finalized(&self, header: SealedHeader) {
-        self.inner.finalized_block.send_modify(|h| {
-            let _ = h.replace(header);
+        self.inner.finalized_block.send_if_modified(|current_header| {
+            if current_header.as_ref() != Some(&header) {
+                let _ = current_header.replace(header);
+                return true
+            }
+
+            false
         });
     }