chore: display last upper synced block slot and root in log

Author: PJColombo

Diff for: src/indexer/mod.rs

@@ -111,7 +111,7 @@ impl Indexer<ReqwestTransport> {
             },
         };
 
-        let last_synced_block = sync_state.and_then(|state| {
+        let last_synced_block = sync_state.as_ref().and_then(|state| {
             match (
                 state.last_upper_synced_block_root,
                 state.last_upper_synced_slot,
@@ -125,14 +125,10 @@ impl Indexer<ReqwestTransport> {
             }
         });
 
-        let upper_indexed_block_id = match &last_synced_block {
-            Some(block) => block.slot.into(),
-            None => BlockId::Head,
-        };
-
         info!(
-            lower_indexed_block_id = current_lower_block_id.to_string(),
-            upper_indexed_block_id = upper_indexed_block_id.to_string(),
+            last_lowest_synced_slot = ?current_lower_block_id,
+            last_upper_synced_block_slot = ?last_synced_block.as_ref().map(|block| block.slot),
+            last_upper_synced_block_root = ?last_synced_block.as_ref().map(|block| block.root),
             "Starting indexer…",
         );