NotifyBlockTip signal: switch from hash (uint256) to CBlockIndex*

- also adds a boolean for indication if the tip update was happening during initial sync
- emit notification also during initial sync

src/init.cpp

@@ -515,11 +515,14 @@ std::string LicenseInfo()
            "\n";
 }
 
-static void BlockNotifyCallback(const uint256& hashNewTip)
+static void BlockNotifyCallback(bool initialSync, const CBlockIndex *pBlockIndex)
 {
+    if (initialSync || !pBlockIndex)
+        return;
+
     std::string strCmd = GetArg("-blocknotify", "");
 
-    boost::replace_all(strCmd, "%s", hashNewTip.GetHex());
+    boost::replace_all(strCmd, "%s", pBlockIndex->GetBlockHash().GetHex());
     boost::thread t(runCommand, strCmd); // thread runs free
 }
 

src/main.cpp

@@ -2636,9 +2636,11 @@ bool ActivateBestChain(CValidationState &state, const CChainParams& chainparams,
             // Notify external listeners about the new tip.
             if (!vHashes.empty()) {
                 GetMainSignals().UpdatedBlockTip(pindexNewTip);
-                uiInterface.NotifyBlockTip(vHashes.front());
             }
         }
+        if (!vHashes.empty()) {
+            uiInterface.NotifyBlockTip(fInitialDownload, pindexNewTip);
+        }
     } while(pindexMostWork != chainActive.Tip());
     CheckBlockIndex(chainparams.GetConsensus());
 

src/ui_interface.h

@@ -15,6 +15,7 @@
 class CBasicKeyStore;
 class CWallet;
 class uint256;
+class CBlockIndex;
 
 /** General change type (added, updated, removed). */
 enum ChangeType
@@ -94,7 +95,7 @@ public:
     boost::signals2::signal<void (const std::string &title, int nProgress)> ShowProgress;
 
     /** New block has been accepted */
-    boost::signals2::signal<void (const uint256& hash)> NotifyBlockTip;
+    boost::signals2::signal<void (bool, const CBlockIndex *)> NotifyBlockTip;
 
     /** Banlist did change. */
     boost::signals2::signal<void (void)> BannedListChanged;