From c9dea0fe1551a4ef0dfac88c1284d894f4d5f42a Mon Sep 17 00:00:00 2001
From: adityapk00 <adityapk@gmail.com>
Date: Sat, 3 Nov 2018 12:41:52 -0700
Subject: [PATCH] fix crashes when zcashd is not present

---
 src/rpc.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/rpc.cpp b/src/rpc.cpp
index fa205b9..562a6da 100644
--- a/src/rpc.cpp
+++ b/src/rpc.cpp
@@ -213,6 +213,10 @@ void RPC::sendZTransaction(json params, const std::function<void(json)>& cb) {
  * private keys
  */ 
 void RPC::getAllPrivKeys(const std::function<void(QList<QPair<QString, QString>>)> cb) {
+    if (conn == nullptr) {
+        // No connection, just return
+        return;
+    }
 
     // A special function that will call the callback when two lists have been added
     auto holder = new QPair<int, QList<QPair<QString, QString>>>();
@@ -813,6 +817,12 @@ void RPC::refreshZECPrice() {
 }
 
 void RPC::shutdownZcashd() {
+    // Shutdown embedded zcashd if it was started
+    if (ezcashd == nullptr || conn == nullptr) {
+        // No zcashd running internally, just return
+        return;
+    }
+
     json payload = {
         {"jsonrpc", "1.0"},
         {"id", "someid"},