From 120c7b973059cefef32b4fa0fea4206e5f220f1f Mon Sep 17 00:00:00 2001
From: Umar Bolatov <bolatovumar@gmail.com>
Date: Mon, 29 Mar 2021 22:26:33 -0700
Subject: [PATCH] Ensure submitting empty currency does not break update PoS
 page (#2376)

---
 BTCPayServer/Controllers/AppsController.PointOfSale.cs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/BTCPayServer/Controllers/AppsController.PointOfSale.cs b/BTCPayServer/Controllers/AppsController.PointOfSale.cs
index 6830c2fc8..fb46bf12d 100644
--- a/BTCPayServer/Controllers/AppsController.PointOfSale.cs
+++ b/BTCPayServer/Controllers/AppsController.PointOfSale.cs
@@ -161,6 +161,11 @@ namespace BTCPayServer.Controllers
         [Route("{appId}/settings/pos")]
         public async Task<IActionResult> UpdatePointOfSale(string appId, UpdatePointOfSaleViewModel vm)
         {
+            if (!ModelState.IsValid)
+            {
+                return View(vm);
+            }
+            
             if (_currencies.GetCurrencyData(vm.Currency, false) == null)
                 ModelState.AddModelError(nameof(vm.Currency), "Invalid currency");
             try