From 1c81d5830237fc07745fe696ca0020f2b88282d4 Mon Sep 17 00:00:00 2001
From: HaoranYi <haoran.yi@solana.com>
Date: Thu, 29 Feb 2024 16:45:29 +0000
Subject: [PATCH] fix panic in accumulate lt hash. add TODO for future
 optimization

---
 accounts-db/src/accounts_db.rs | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/accounts-db/src/accounts_db.rs b/accounts-db/src/accounts_db.rs
index c77e8234b16448..a80b4ae0e6c2cb 100644
--- a/accounts-db/src/accounts_db.rs
+++ b/accounts-db/src/accounts_db.rs
@@ -8128,12 +8128,13 @@ impl AccountsDb {
         let old = pubkey_hash
             .iter()
             .map(|(k, _)| {
-                if let Some((account, hash)) = old_written_accounts.get(k) {
-                    Some(hash.unwrap()) // todo on demand calculate, calculate in bg
-                } else {
-                    self.load_with_fixed_root(&ancestors, k)
-                        .map(|(account, _)| Self::lt_hash_account(&account, k))
-                }
+                /// TODO: add optimization to cache lt_hash from last slot
+                //if let Some((account, hash)) = old_written_accounts.get(k) {
+                //    Some(hash.unwrap()) // todo on demand calculate, calculate in bg
+                //} else {
+                self.load_with_fixed_root(&ancestors, k)
+                    .map(|(account, _)| Self::lt_hash_account(&account, k))
+                //}
             })
             .collect::<Vec<_>>();