From db3282cdf00aae69fdd38680b4f58999d8c5d34a Mon Sep 17 00:00:00 2001
From: Ilya Kitaev <mbg033@gmail.com>
Date: Wed, 5 Oct 2016 19:01:26 +0300
Subject: [PATCH] Initialize transaction history if empty

---
 src/wallet/api/transaction_history.cpp | 5 +++--
 src/wallet/api/transaction_history.h   | 2 ++
 src/wallet/api/wallet.cpp              | 6 ++++++
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/wallet/api/transaction_history.cpp b/src/wallet/api/transaction_history.cpp
index 86dff85a4..190aa67c5 100644
--- a/src/wallet/api/transaction_history.cpp
+++ b/src/wallet/api/transaction_history.cpp
@@ -79,6 +79,9 @@ std::vector<TransactionInfo *> TransactionHistoryImpl::getAll() const
 
 void TransactionHistoryImpl::refresh()
 {
+    // multithreaded access:
+    boost::lock_guard<boost::mutex> guarg(m_refreshMutex);
+
     // TODO: configurable values;
     uint64_t min_height = 0;
     uint64_t max_height = (uint64_t)-1;
@@ -88,8 +91,6 @@ void TransactionHistoryImpl::refresh()
         delete t;
     m_history.clear();
 
-
-
     // transactions are stored in wallet2:
     // - confirmed_transfer_details   - out transfers
     // - unconfirmed_transfer_details - pending out transfers
diff --git a/src/wallet/api/transaction_history.h b/src/wallet/api/transaction_history.h
index 171fd2210..0b7e079b9 100644
--- a/src/wallet/api/transaction_history.h
+++ b/src/wallet/api/transaction_history.h
@@ -29,6 +29,7 @@
 // Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
 
 #include "wallet/wallet2_api.h"
+#include <boost/thread/mutex.hpp>
 
 namespace Bitmonero {
 
@@ -51,6 +52,7 @@ private:
     // TransactionHistory is responsible of memory management
     std::vector<TransactionInfo*> m_history;
     WalletImpl *m_wallet;
+    boost::mutex        m_refreshMutex;
 };
 
 }
diff --git a/src/wallet/api/wallet.cpp b/src/wallet/api/wallet.cpp
index 4d35bc404..eb6fe5db2 100644
--- a/src/wallet/api/wallet.cpp
+++ b/src/wallet/api/wallet.cpp
@@ -723,6 +723,12 @@ void WalletImpl::doRefresh()
     boost::lock_guard<boost::mutex> guarg(m_refreshMutex2);
     try {
         m_wallet->refresh();
+        // assuming if we have empty history, it wasn't initialized yet
+        // for futher history changes client need to update history in
+        // "on_money_received" and "on_money_sent" callbacks
+        if (m_history->count() == 0) {
+            m_history->refresh();
+        }
     } catch (const std::exception &e) {
         m_status = Status_Error;
         m_errorString = e.what();