cherrypick d531cf36 from litecoin-project/litecoin

src/primitives/block.cpp

@@ -9,12 +9,20 @@
 #include <tinyformat.h>
 #include <util/strencodings.h>
 #include <crypto/common.h>
+#include <crypto/scrypt.h>
 
 uint256 CBlockHeader::GetHash() const
 {
     return SerializeHash(*this);
 }
 
+uint256 CBlockHeader::GetPoWHash() const
+{
+    uint256 thash;
+    scrypt_1024_1_1_256(BEGIN(nVersion), BEGIN(thash));
+    return thash;
+}
+
 std::string CBlock::ToString() const
 {
     std::stringstream s;