From a5ed318634016a25be4000ee07044a31f363e60c Mon Sep 17 00:00:00 2001
From: Vladislav Volosnikov <vladyan18@gmail.com>
Date: Sat, 26 Aug 2023 01:17:32 +0200
Subject: [PATCH] Refactor access to Checkpoint struct without using memory
 (#4512)

---
 .../governance/extensions/GovernorVotesQuorumFraction.sol | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/contracts/governance/extensions/GovernorVotesQuorumFraction.sol b/contracts/governance/extensions/GovernorVotesQuorumFraction.sol
index f7def8529..774bff6b1 100644
--- a/contracts/governance/extensions/GovernorVotesQuorumFraction.sol
+++ b/contracts/governance/extensions/GovernorVotesQuorumFraction.sol
@@ -49,9 +49,11 @@ abstract contract GovernorVotesQuorumFraction is GovernorVotes {
         uint256 length = _quorumNumeratorHistory._checkpoints.length;
 
         // Optimistic search, check the latest checkpoint
-        Checkpoints.Checkpoint224 memory latest = _quorumNumeratorHistory._checkpoints[length - 1];
-        if (latest._key <= timepoint) {
-            return latest._value;
+        Checkpoints.Checkpoint224 storage latest = _quorumNumeratorHistory._checkpoints[length - 1];
+        uint32 latestKey = latest._key;
+        uint224 latestValue = latest._value;
+        if (latestKey <= timepoint) {
+            return latestValue;
         }
 
         // Otherwise, do the binary search