Cancel wallet balance timer when shutdown requested

This doesn't fix any current problem, but it makes balance checking code less
fragile, and prevents use-after free travis error in next commit:
https://travis-ci.org/github/bitcoin/bitcoin/jobs/675367629#L4240

1 files changed, 3 insertions, 1 deletions

diff --git a/src/qt/walletmodel.h b/src/qt/walletmodel.h
index 5521565f7c..23232ec66b 100644
--- a/src/qt/walletmodel.h
+++ b/src/qt/walletmodel.h
@@ -144,6 +144,7 @@ public:
 
     interfaces::Node& node() const { return m_node; }
     interfaces::Wallet& wallet() const { return *m_wallet; }
+    void setClientModel(ClientModel* client_model);
     int getNumBlocks() const { return cachedNumBlocks; }
 
     QString getWalletName() const;
@@ -161,7 +162,7 @@ private:
     std::unique_ptr<interfaces::Handler> m_handler_show_progress;
     std::unique_ptr<interfaces::Handler> m_handler_watch_only_changed;
     std::unique_ptr<interfaces::Handler> m_handler_can_get_addrs_changed;
-    ClientModel& m_client_model;
+    ClientModel* m_client_model;
     interfaces::Node& m_node;
 
     bool fHaveWatchOnly;
@@ -179,6 +180,7 @@ private:
     interfaces::WalletBalances m_cached_balances;
     EncryptionStatus cachedEncryptionStatus;
     int cachedNumBlocks;
+    QTimer* timer;
 
     void subscribeToCoreSignals();
     void unsubscribeFromCoreSignals();