perf: read ChainInfo from in-memory canonical block (#2669)

crates/storage/provider/src/providers/chain_info.rs

@@ -1,5 +1,5 @@
 use parking_lot::RwLock;
-use reth_primitives::{BlockNumHash, SealedHeader};
+use reth_primitives::{BlockNumHash, ChainInfo, SealedHeader};
 use std::{sync::Arc, time::Instant};
 
 /// Tracks the chain info: canonical head, safe block, finalized block.
@@ -21,6 +21,12 @@ impl ChainInfoTracker {
         }
     }
 
+    /// Returns the [ChainInfo] for the canonical head.
+    pub(crate) fn chain_info(&self) -> ChainInfo {
+        let inner = self.inner.canonical_head.read();
+        ChainInfo { best_hash: inner.hash(), best_number: inner.number }
+    }
+
     /// Update the timestamp when we received a forkchoice update.
     pub(crate) fn on_forkchoice_update_received(&self) {
         self.inner.last_forkchoice_update.write().replace(Instant::now());

crates/storage/provider/src/providers/mod.rs

@@ -120,7 +120,7 @@ where
     Tree: BlockchainTreeViewer + Send + Sync,
 {
     fn chain_info(&self) -> Result<ChainInfo> {
-        self.database.chain_info()
+        Ok(self.chain_info.chain_info())
     }
 
     fn best_block_number(&self) -> Result<BlockNumber> {