BlockTip struct created and connected to notifyHeaderTip and notifyBlockTip signals.

src/interfaces/node.cpp

@@ -315,7 +315,7 @@ public:
     std::unique_ptr<Handler> handleNotifyBlockTip(NotifyBlockTipFn fn) override
     {
         return MakeHandler(::uiInterface.NotifyBlockTip_connect([fn](SynchronizationState sync_state, const CBlockIndex* block) {
-            fn(sync_state, block->GetBlockHash(), block->nHeight, block->GetBlockTime(),
+            fn(sync_state, BlockTip{block->nHeight, block->GetBlockTime(), block->GetBlockHash()},
                 GuessVerificationProgress(Params().TxData(), block));
         }));
     }
@@ -323,7 +323,7 @@ public:
     {
         return MakeHandler(
             ::uiInterface.NotifyHeaderTip_connect([fn](SynchronizationState sync_state, const CBlockIndex* block) {
-                fn(sync_state, block->GetBlockHash(), block->nHeight, block->GetBlockTime(),
+                fn(sync_state, BlockTip{block->nHeight, block->GetBlockTime(), block->GetBlockHash()},
                     /* verification progress is unused when a header was received */ 0);
             }));
     }

src/interfaces/node.h

@@ -36,6 +36,7 @@ struct bilingual_str;
 namespace interfaces {
 class Handler;
 class Wallet;
+struct BlockTip;
 
 //! Top-level interface for a bitcoin node (bitcoind process).
 class Node
@@ -253,12 +254,12 @@ public:
 
     //! Register handler for block tip messages.
     using NotifyBlockTipFn =
-        std::function<void(SynchronizationState, const uint256& block_hash, int height, int64_t block_time, double verification_progress)>;
+        std::function<void(SynchronizationState, interfaces::BlockTip tip, double verification_progress)>;
     virtual std::unique_ptr<Handler> handleNotifyBlockTip(NotifyBlockTipFn fn) = 0;
 
     //! Register handler for header tip messages.
     using NotifyHeaderTipFn =
-        std::function<void(SynchronizationState, const uint256& block_hash, int height, int64_t block_time, double verification_progress)>;
+        std::function<void(SynchronizationState, interfaces::BlockTip tip, double verification_progress)>;
     virtual std::unique_ptr<Handler> handleNotifyHeaderTip(NotifyHeaderTipFn fn) = 0;
 
     //! Return pointer to internal chain interface, useful for testing.
@@ -268,6 +269,13 @@ public:
 //! Return implementation of Node interface.
 std::unique_ptr<Node> MakeNode();
 
+//! Block tip (could be a header or not, depends on the subscribed signal).
+struct BlockTip {
+    int block_height;
+    int64_t block_time;
+    uint256 block_hash;
+};
+
 } // namespace interfaces
 
 #endif // BITCOIN_INTERFACES_NODE_H

src/qt/clientmodel.cpp

@@ -244,15 +244,15 @@ static void BannedListChanged(ClientModel *clientmodel)
     assert(invoked);
 }
 
-static void BlockTipChanged(ClientModel* clientmodel, SynchronizationState sync_state, const uint256 block_hash, int height, int64_t blockTime, double verificationProgress, bool fHeader)
+static void BlockTipChanged(ClientModel* clientmodel, SynchronizationState sync_state, interfaces::BlockTip tip, double verificationProgress, bool fHeader)
 {
     if (fHeader) {
         // cache best headers time and height to reduce future cs_main locks
-        clientmodel->cachedBestHeaderHeight = height;
+        clientmodel->cachedBestHeaderHeight = tip.block_height;
-        clientmodel->cachedBestHeaderTime = blockTime;
+        clientmodel->cachedBestHeaderTime = tip.block_time;
     } else {
-        clientmodel->m_cached_num_blocks = height;
+        clientmodel->m_cached_num_blocks = tip.block_height;
-        WITH_LOCK(clientmodel->m_cached_tip_mutex, clientmodel->m_cached_tip_blocks = block_hash;);
+        WITH_LOCK(clientmodel->m_cached_tip_mutex, clientmodel->m_cached_tip_blocks = tip.block_hash;);
     }
 
     // Throttle GUI notifications about (a) blocks during initial sync, and (b) both blocks and headers during reindex.
@@ -264,8 +264,8 @@ static void BlockTipChanged(ClientModel* clientmodel, SynchronizationState sync_
     }
 
     bool invoked = QMetaObject::invokeMethod(clientmodel, "numBlocksChanged", Qt::QueuedConnection,
-        Q_ARG(int, height),
+        Q_ARG(int, tip.block_height),
-        Q_ARG(QDateTime, QDateTime::fromTime_t(blockTime)),
+        Q_ARG(QDateTime, QDateTime::fromTime_t(tip.block_time)),
         Q_ARG(double, verificationProgress),
         Q_ARG(bool, fHeader),
         Q_ARG(SynchronizationState, sync_state));
@@ -281,8 +281,8 @@ void ClientModel::subscribeToCoreSignals()
     m_handler_notify_network_active_changed = m_node.handleNotifyNetworkActiveChanged(std::bind(NotifyNetworkActiveChanged, this, std::placeholders::_1));
     m_handler_notify_alert_changed = m_node.handleNotifyAlertChanged(std::bind(NotifyAlertChanged, this));
     m_handler_banned_list_changed = m_node.handleBannedListChanged(std::bind(BannedListChanged, this));
-    m_handler_notify_block_tip = m_node.handleNotifyBlockTip(std::bind(BlockTipChanged, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3, std::placeholders::_4, std::placeholders::_5, false));
+    m_handler_notify_block_tip = m_node.handleNotifyBlockTip(std::bind(BlockTipChanged, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3, false));
-    m_handler_notify_header_tip = m_node.handleNotifyHeaderTip(std::bind(BlockTipChanged, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3, std::placeholders::_4, std::placeholders::_5, true));
+    m_handler_notify_header_tip = m_node.handleNotifyHeaderTip(std::bind(BlockTipChanged, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3, true));
 }
 
 void ClientModel::unsubscribeFromCoreSignals()

src/qt/clientmodel.h

@@ -77,7 +77,7 @@ public:
 
     bool getProxyInfo(std::string& ip_port) const;
 
-    // caches for the best header, number of blocks
+    // caches for the best header: hash, number of blocks and block time
     mutable std::atomic<int> cachedBestHeaderHeight;
     mutable std::atomic<int64_t> cachedBestHeaderTime;
     mutable std::atomic<int> m_cached_num_blocks{-1};