From 5624e055b310284e8dfd68833eea7f7246316354 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Jo=C3=A3o=20Barbosa?= <joao@bitreserve.org>
Date: Thu, 7 May 2015 15:49:00 +0100
Subject: [PATCH] Add UpdatedBlockTip signal to CMainSignals and
 CValidationInterface

---
 src/main.cpp                | 1 +
 src/validationinterface.cpp | 4 ++++
 src/validationinterface.h   | 3 +++
 3 files changed, 8 insertions(+)

diff --git a/src/main.cpp b/src/main.cpp
index a880533e6..27278b977 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2303,6 +2303,7 @@ bool ActivateBestChain(CValidationState &state, const CBlock *pblock) {
                         pnode->PushInventory(CInv(MSG_BLOCK, hashNewTip));
             }
             // Notify external listeners about the new tip.
+            GetMainSignals().UpdatedBlockTip(hashNewTip);
             uiInterface.NotifyBlockTip(hashNewTip);
         }
     } while(pindexMostWork != chainActive.Tip());
diff --git a/src/validationinterface.cpp b/src/validationinterface.cpp
index d365f0300..bdb706907 100644
--- a/src/validationinterface.cpp
+++ b/src/validationinterface.cpp
@@ -13,6 +13,7 @@ CMainSignals& GetMainSignals()
 }
 
 void RegisterValidationInterface(CValidationInterface* pwalletIn) {
+    g_signals.UpdatedBlockTip.connect(boost::bind(&CValidationInterface::UpdatedBlockTip, pwalletIn, _1));
     g_signals.SyncTransaction.connect(boost::bind(&CValidationInterface::SyncTransaction, pwalletIn, _1, _2));
     g_signals.UpdatedTransaction.connect(boost::bind(&CValidationInterface::UpdatedTransaction, pwalletIn, _1));
     g_signals.SetBestChain.connect(boost::bind(&CValidationInterface::SetBestChain, pwalletIn, _1));
@@ -32,6 +33,7 @@ void UnregisterValidationInterface(CValidationInterface* pwalletIn) {
     g_signals.SetBestChain.disconnect(boost::bind(&CValidationInterface::SetBestChain, pwalletIn, _1));
     g_signals.UpdatedTransaction.disconnect(boost::bind(&CValidationInterface::UpdatedTransaction, pwalletIn, _1));
     g_signals.SyncTransaction.disconnect(boost::bind(&CValidationInterface::SyncTransaction, pwalletIn, _1, _2));
+    g_signals.UpdatedBlockTip.disconnect(boost::bind(&CValidationInterface::UpdatedBlockTip, pwalletIn, _1));
 }
 
 void UnregisterAllValidationInterfaces() {
@@ -43,6 +45,8 @@ void UnregisterAllValidationInterfaces() {
     g_signals.SetBestChain.disconnect_all_slots();
     g_signals.UpdatedTransaction.disconnect_all_slots();
     g_signals.SyncTransaction.disconnect_all_slots();
+    g_signals.UpdatedTransaction.disconnect_all_slots();
+    g_signals.UpdatedBlockTip.disconnect_all_slots();
 }
 
 void SyncWithWallets(const CTransaction &tx, const CBlock *pblock) {
diff --git a/src/validationinterface.h b/src/validationinterface.h
index fb0ce0bda..6f95ad74e 100644
--- a/src/validationinterface.h
+++ b/src/validationinterface.h
@@ -30,6 +30,7 @@ void SyncWithWallets(const CTransaction& tx, const CBlock* pblock = NULL);
 
 class CValidationInterface {
 protected:
+    virtual void UpdatedBlockTip(const uint256 &newHashTip) {}
     virtual void SyncTransaction(const CTransaction &tx, const CBlock *pblock) {}
     virtual void SetBestChain(const CBlockLocator &locator) {}
     virtual void UpdatedTransaction(const uint256 &hash) {}
@@ -44,6 +45,8 @@ protected:
 };
 
 struct CMainSignals {
+    /** Notifies listeners of updated block chain tip */
+    boost::signals2::signal<void (const uint256 &)> UpdatedBlockTip;
     /** Notifies listeners of updated transaction data (transaction, and optionally the block it is found in. */
     boost::signals2::signal<void (const CTransaction &, const CBlock *)> SyncTransaction;
     /** Notifies listeners of an updated transaction without new data (for now: a coinbase potentially becoming visible). */
-- 
2.11.4.GIT