1 files changed, 7 insertions, 21 deletions
diff --git a/src/coins.cpp b/src/coins.cpp
index bc430c9c7e..ef4f96fdee 100644
--- a/src/coins.cpp
+++ b/src/coins.cpp
@@ -31,32 +31,18 @@ void CCoins::CalcMaskSize(unsigned int &nBytes, unsigned int &nNonzeroBytes) con
     nBytes += nLastUsedByte;
 }
 
-bool CCoins::Spend(const COutPoint &out, CTxInUndo &undo) {
-    if (out.n >= vout.size())
-        return false;
-    if (vout[out.n].IsNull())
+bool CCoins::Spend(uint32_t nPos) 
+{
+    if (nPos >= vout.size() || vout[nPos].IsNull())
         return false;
-    undo = CTxInUndo(vout[out.n]);
-    vout[out.n].SetNull();
+    vout[nPos].SetNull();
     Cleanup();
-    if (vout.size() == 0) {
-        undo.nHeight = nHeight;
-        undo.fCoinBase = fCoinBase;
-        undo.nVersion = this->nVersion;
-    }
     return true;
 }
 
-bool CCoins::Spend(int nPos) {
-    CTxInUndo undo;
-    COutPoint out(0, nPos);
-    return Spend(out, undo);
-}
-
-
 bool CCoinsView::GetCoins(const uint256 &txid, CCoins &coins) const { return false; }
 bool CCoinsView::HaveCoins(const uint256 &txid) const { return false; }
-uint256 CCoinsView::GetBestBlock() const { return uint256(0); }
+uint256 CCoinsView::GetBestBlock() const { return uint256(); }
 bool CCoinsView::BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock) { return false; }
 bool CCoinsView::GetStats(CCoinsStats &stats) const { return false; }
 
@@ -71,7 +57,7 @@ bool CCoinsViewBacked::GetStats(CCoinsStats &stats) const { return base->GetStat
 
 CCoinsKeyHasher::CCoinsKeyHasher() : salt(GetRandHash()) {}
 
-CCoinsViewCache::CCoinsViewCache(CCoinsView *baseIn) : CCoinsViewBacked(baseIn), hasModifier(false), hashBlock(0) { }
+CCoinsViewCache::CCoinsViewCache(CCoinsView *baseIn) : CCoinsViewBacked(baseIn), hasModifier(false) { }
 
 CCoinsViewCache::~CCoinsViewCache()
 {
@@ -142,7 +128,7 @@ bool CCoinsViewCache::HaveCoins(const uint256 &txid) const {
 }
 
 uint256 CCoinsViewCache::GetBestBlock() const {
-    if (hashBlock == uint256(0))
+    if (hashBlock.IsNull())
         hashBlock = base->GetBestBlock();
     return hashBlock;
 }