Add z_viewtransaction RPC method

src/rpc.cpp

@@ -275,6 +275,17 @@ void RPC::getZUnspent(const std::function<void(QJsonValue)>& cb) {
     conn->doRPCWithDefaultErrorHandling(payload, cb);
 }
 
+void RPC::z_viewtransaction(QString txid, const std::function<void(QJsonValue)>& cb) {
+    QJsonObject payload = {
+        {"jsonrpc", "1.0"},
+        {"id", "42"},
+        {"method", "z_viewtransaction"},
+        {"params", QJsonArray {txid}}
+    };
+
+    conn->doRPCWithDefaultErrorHandling(payload, cb);
+}
+
 void RPC::newZaddr(const std::function<void(QJsonValue)>& cb) {
     QJsonObject payload = {
         {"jsonrpc", "1.0"},

src/rpc.h

@@ -101,6 +101,7 @@ public:
 
     void newZaddr(const std::function<void(QJsonValue)>& cb);
     void newTaddr(const std::function<void(QJsonValue)>& cb);
+    void z_viewtransaction(QString txid, const std::function<void(QJsonValue)>& cb);
 
     void setGenerate(int proclimit, const std::function<void(QJsonValue)>& cb);
     void stopGenerate(int proclimit, const std::function<void(QJsonValue)>& cb);