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, 65 insertions, 0 deletions

diff --git a/src/serialization/difficulty_type.h b/src/serialization/difficulty_type.h
new file mode 100644
index 000000000..e32e24b78
--- /dev/null
+++ b/src/serialization/difficulty_type.h
@@ -0,0 +1,65 @@
+// Copyright (c) 2019, The Monero Project
+// 
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+// 
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+// 
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//    of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+// 
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#pragma once
+
+#include "cryptonote_basic/difficulty.h"
+#include "serialization.h"
+
+template<> struct is_basic_type<cryptonote::difficulty_type> { typedef boost::true_type type; };
+
+template <template <bool> class Archive>
+inline bool do_serialize(Archive<false>& ar, cryptonote::difficulty_type &diff)
+{
+  uint64_t hi, lo;
+  ar.serialize_varint(hi);
+  if (!ar.stream().good())
+    return false;
+  ar.serialize_varint(lo);
+  if (!ar.stream().good())
+    return false;
+  diff = hi;
+  diff <<= 64;
+  diff += lo;
+  return true;
+}
+
+template <template <bool> class Archive>
+inline bool do_serialize(Archive<true>& ar, cryptonote::difficulty_type &diff)
+{
+  if (!ar.stream().good())
+    return false;
+  const uint64_t hi = (diff >> 64).convert_to<uint64_t>();
+  const uint64_t lo = (diff << 64 >> 64).convert_to<uint64_t>();
+  ar.serialize_varint(hi);
+  ar.serialize_varint(lo);
+  if (!ar.stream().good())
+    return false;
+  return true;
+}
+