Simple transaction history

src/libwalletqt/TransactionHistory.cpp

@@ -2,11 +2,18 @@
 #include "TransactionInfo.h"
 #include <wallet/wallet2_api.h>
 
+#include <QDebug>
+
 
 TransactionInfo *TransactionHistory::transaction(int index)
 {
     // box up Bitmonero::TransactionInfo
     Bitmonero::TransactionInfo * impl = m_pimpl->transaction(index);
+    if (!impl) {
+        qCritical("%s: no transaction info for index %d", __FUNCTION__, index);
+        qCritical("%s: there's %d transactions in backend", __FUNCTION__, m_pimpl->count());
+        return nullptr;
+    }
     TransactionInfo * result = new TransactionInfo(impl, this);
     return result;
 }
@@ -34,6 +41,7 @@ QList<TransactionInfo *> TransactionHistory::getAll() const
 void TransactionHistory::refresh()
 {
     // XXX this invalidates previously saved history that might be used by clients
+
     emit refreshStarted();
     m_pimpl->refresh();
     emit refreshFinished();