feat(store): add new api LatestVersion (#22305)

store/rootmulti/dbadapter.go

@@ -36,6 +36,10 @@ func (cdsa commitDBStoreAdapter) LastCommitID() types.CommitID {
 	}
 }
 
+func (cdsa commitDBStoreAdapter) LatestVersion() int64 {
+	return -1
+}
+
 func (cdsa commitDBStoreAdapter) WorkingHash() []byte {
 	return commithash
 }

store/rootmulti/store.go

@@ -434,7 +434,11 @@ func (rs *Store) PopStateCache() []*types.StoreKVPair {
 
 // LatestVersion returns the latest version in the store
 func (rs *Store) LatestVersion() int64 {
-	return rs.LastCommitID().Version
+	if rs.lastCommitInfo == nil {
+		return GetLatestVersion(rs.db)
+	}
+
+	return rs.lastCommitInfo.Version
 }
 
 // LastCommitID implements Committer/CommitStore.