From 07d655e438e1b1e05426a5c75627f5d8c63bbc72 Mon Sep 17 00:00:00 2001
From: moneromooo-monero <moneromooo-monero@users.noreply.github.com>
Date: Tue, 20 Nov 2018 10:58:41 +0000
Subject: [PATCH] blockchain: avoid duplicate block hash computation

---
 src/cryptonote_core/blockchain.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp
index a15fda093..0379ab760 100644
--- a/src/cryptonote_core/blockchain.cpp
+++ b/src/cryptonote_core/blockchain.cpp
@@ -3474,11 +3474,10 @@ leave:
 #if defined(PER_BLOCK_CHECKPOINT)
   if (m_db->height() < m_blocks_hash_check.size())
   {
-    auto hash = get_block_hash(bl);
     const auto &expected_hash = m_blocks_hash_check[m_db->height()];
     if (expected_hash != crypto::null_hash)
     {
-      if (memcmp(&hash, &expected_hash, sizeof(hash)) != 0)
+      if (memcmp(&id, &expected_hash, sizeof(hash)) != 0)
       {
         MERROR_VER("Block with id is INVALID: " << id << ", expected " << expected_hash);
         bvc.m_verifivation_failed = true;