Retry latest vote if expired (#16735)

core/src/progress_map.rs

@@ -259,6 +259,7 @@ pub(crate) struct ForkStats {
     pub(crate) computed: bool,
     pub(crate) lockout_intervals: LockoutIntervals,
     pub(crate) bank_hash: Option<Hash>,
+    pub(crate) my_latest_landed_vote: Option<Slot>,
 }
 
 #[derive(Clone, Default)]
@@ -532,6 +533,12 @@ impl ProgressMap {
         }
     }
 
+    pub fn my_latest_landed_vote(&self, slot: Slot) -> Option<Slot> {
+        self.progress_map
+            .get(&slot)
+            .and_then(|s| s.fork_stats.my_latest_landed_vote)
+    }
+
     pub fn set_supermajority_confirmed_slot(&mut self, slot: Slot) {
         let slot_progress = self.get_mut(&slot).unwrap();
         slot_progress.fork_stats.is_supermajority_confirmed = true;