2 files changed, 5 insertions, 0 deletions
diff --git a/src/cryptonote_protocol/cryptonote_protocol_defs.h b/src/cryptonote_protocol/cryptonote_protocol_defs.h
index 6e6c83f04..71e205c23 100644
--- a/src/cryptonote_protocol/cryptonote_protocol_defs.h
+++ b/src/cryptonote_protocol/cryptonote_protocol_defs.h
@@ -197,11 +197,13 @@ namespace cryptonote
   struct CORE_SYNC_DATA
   {
     uint64_t current_height;
+    uint64_t cumulative_difficulty;
     crypto::hash  top_id;
     uint8_t top_version;
 
     BEGIN_KV_SERIALIZE_MAP()
       KV_SERIALIZE(current_height)
+      KV_SERIALIZE(cumulative_difficulty)
       KV_SERIALIZE_VAL_POD_AS_BLOB(top_id)
       KV_SERIALIZE_OPT(top_version, (uint8_t)0)
     END_KV_SERIALIZE_MAP()
@@ -229,11 +231,13 @@ namespace cryptonote
     {
       uint64_t start_height;
       uint64_t total_height;
+      uint64_t cumulative_difficulty;
       std::list<crypto::hash> m_block_ids;
 
       BEGIN_KV_SERIALIZE_MAP()
         KV_SERIALIZE(start_height)
         KV_SERIALIZE(total_height)
+        KV_SERIALIZE(cumulative_difficulty)
         KV_SERIALIZE_CONTAINER_POD_AS_BLOB(m_block_ids)
       END_KV_SERIALIZE_MAP()
     };
diff --git a/src/cryptonote_protocol/cryptonote_protocol_handler.inl b/src/cryptonote_protocol/cryptonote_protocol_handler.inl
index 9ec20b5e1..c78aae67e 100644
--- a/src/cryptonote_protocol/cryptonote_protocol_handler.inl
+++ b/src/cryptonote_protocol/cryptonote_protocol_handler.inl
@@ -309,6 +309,7 @@ namespace cryptonote
   {
     m_core.get_blockchain_top(hshd.current_height, hshd.top_id);
     hshd.top_version = m_core.get_hard_fork_version(hshd.current_height);
+    hshd.cumulative_difficulty = m_core.get_block_cumulative_difficulty(hshd.current_height);
     hshd.current_height +=1;
     return true;
   }