Requst payment dialog

src/requestdialog.h

@@ -2,6 +2,7 @@
 #define REQUESTDIALOG_H
 
 #include <QDialog>
+#include "mainwindow.h"
 
 namespace Ui {
 class RequestDialog;
@@ -15,6 +16,8 @@ public:
     explicit RequestDialog(QWidget *parent = nullptr);
     ~RequestDialog();
 
+    static void showRequestZcash(MainWindow* main);
+
 private:
     Ui::RequestDialog *ui;
 };