From dcc6f17c9c54c7ec14cb5ce104d5df02f99e2a83 Mon Sep 17 00:00:00 2001
From: d11n <mail@dennisreimann.de>
Date: Mon, 11 Mar 2024 11:05:44 +0100
Subject: [PATCH] POS: Fix exception when asking for data with a top up item
 (#5816)

Fixes #5811.
---
 .../PointOfSale/Controllers/UIPointOfSaleController.cs        | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/BTCPayServer/Plugins/PointOfSale/Controllers/UIPointOfSaleController.cs b/BTCPayServer/Plugins/PointOfSale/Controllers/UIPointOfSaleController.cs
index 6b1f78e65..2ed29b23e 100644
--- a/BTCPayServer/Plugins/PointOfSale/Controllers/UIPointOfSaleController.cs
+++ b/BTCPayServer/Plugins/PointOfSale/Controllers/UIPointOfSaleController.cs
@@ -292,13 +292,13 @@ namespace BTCPayServer.Plugins.PointOfSale.Controllers
                     }
 
                     var amtField = form.GetFieldByFullName($"{FormDataService.InvoiceParameterPrefix}amount");
-                    if (amtField is null && price.HasValue)
+                    if (amtField is null)
                     {
                         form.Fields.Add(new Field
                         {
                             Name = $"{FormDataService.InvoiceParameterPrefix}amount",
                             Type = "hidden",
-                            Value = price.ToString(),
+                            Value = price?.ToString(),
                             Constant = true
                         });
                     }