Make difficulty 128 bit instead of 64 bit

Based on Boolberry work by:
  jahrsg <jahr@jahr.me>
  cr.zoidberg <crypto.zoidberg@gmail.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/src/cryptonote_basic/cryptonote_boost_serialization.h b/src/cryptonote_basic/cryptonote_boost_serialization.h
index 1840b6d2b..3dd98f0c6 100644
--- a/src/cryptonote_basic/cryptonote_boost_serialization.h
+++ b/src/cryptonote_basic/cryptonote_boost_serialization.h
@@ -40,6 +40,7 @@
 #include <boost/archive/portable_binary_iarchive.hpp>
 #include <boost/archive/portable_binary_oarchive.hpp>
 #include "cryptonote_basic.h"
+#include "difficulty.h"
 #include "common/unordered_containers_boost_serialization.h"
 #include "crypto/crypto.h"
 #include "ringct/rctTypes.h"
@@ -346,6 +347,34 @@ namespace boost
     a & x.range_proof_type;
     a & x.bp_version;
   }
+
+  template <class Archive>
+  inline void serialize(Archive &a, cryptonote::difficulty_type &x, const boost::serialization::version_type ver)
+  {
+    if (Archive::is_loading::value)
+    {
+      // load high part
+      uint64_t v = 0;
+      a & v;
+      x = v;
+      // load low part
+      x = x << 64;
+      a & v;
+      x += v;
+    }
+    else
+    {
+      // store high part
+      cryptonote::difficulty_type x_ = x >> 64;
+      uint64_t v = x_.convert_to<uint64_t>();
+      a & v;
+      // store low part
+      x_ = x << 64 >> 64;
+      v = x_.convert_to<uint64_t>();
+      a & v;
+    }
+  }
+
 }
 }