1 files changed, 5 insertions, 2 deletions
diff --git a/src/interfaces/node.h b/src/interfaces/node.h
index 45b0e18fae..e4df908847 100644
--- a/src/interfaces/node.h
+++ b/src/interfaces/node.h
@@ -149,6 +149,9 @@ public:
     //! Get num blocks.
     virtual int getNumBlocks() = 0;
 
+    //! Get best block hash.
+    virtual uint256 getBestBlockHash() = 0;
+
     //! Get last block time.
     virtual int64_t getLastBlockTime() = 0;
 
@@ -250,12 +253,12 @@ public:
 
     //! Register handler for block tip messages.
     using NotifyBlockTipFn =
-        std::function<void(SynchronizationState, int height, int64_t block_time, double verification_progress)>;
+        std::function<void(SynchronizationState, const uint256& block_hash, int height, int64_t block_time, double verification_progress)>;
     virtual std::unique_ptr<Handler> handleNotifyBlockTip(NotifyBlockTipFn fn) = 0;
 
     //! Register handler for header tip messages.
     using NotifyHeaderTipFn =
-        std::function<void(SynchronizationState, int height, int64_t block_time, double verification_progress)>;
+        std::function<void(SynchronizationState, const uint256& block_hash, int height, int64_t block_time, double verification_progress)>;
     virtual std::unique_ptr<Handler> handleNotifyHeaderTip(NotifyHeaderTipFn fn) = 0;
 
     //! Return pointer to internal chain interface, useful for testing.