Use unordered_map for CCoinsViewCache with salted hash

1 files changed, 6 insertions, 2 deletions

diff --git a/src/coins.cpp b/src/coins.cpp
index 13a4ea95cd..e76d8c7ef2 100644
--- a/src/coins.cpp
+++ b/src/coins.cpp
@@ -4,6 +4,8 @@
 
 #include "coins.h"
 
+#include "random.h"
+
 #include <assert.h>
 
 // calculate number of bytes for the bitmask, and its number of non-zero bytes
@@ -69,6 +71,8 @@ void CCoinsViewBacked::SetBackend(CCoinsView &viewIn) { base = &viewIn; }
 bool CCoinsViewBacked::BatchWrite(const CCoinsMap &mapCoins, const uint256 &hashBlock) { return base->BatchWrite(mapCoins, hashBlock); }
 bool CCoinsViewBacked::GetStats(CCoinsStats &stats) { return base->GetStats(stats); }
 
+CCoinsKeyHasher::CCoinsKeyHasher() : salt(GetRandHash()) {}
+
 CCoinsViewCache::CCoinsViewCache(CCoinsView &baseIn, bool fDummy) : CCoinsViewBacked(baseIn), hashBlock(0) { }
 
 bool CCoinsViewCache::GetCoins(const uint256 &txid, CCoins &coins) {
@@ -84,8 +88,8 @@ bool CCoinsViewCache::GetCoins(const uint256 &txid, CCoins &coins) {
 }
 
 CCoinsMap::iterator CCoinsViewCache::FetchCoins(const uint256 &txid) {
-    CCoinsMap::iterator it = cacheCoins.lower_bound(txid);
-    if (it != cacheCoins.end() && it->first == txid)
+    CCoinsMap::iterator it = cacheCoins.find(txid);
+    if (it != cacheCoins.end())
         return it;
     CCoins tmp;
     if (!base->GetCoins(txid,tmp))