Errors not working in PointOfSale (#1141)

BTCPayServer/Controllers/AppsPublicController.cs

@@ -165,6 +165,8 @@ namespace BTCPayServer.Controllers
                 }
             }
             var store = await _AppService.GetStore(app);
+            try
+            {
                 var invoice = await _InvoiceController.CreateInvoiceCore(new CreateInvoiceRequest()
                 {
                     ItemCode = choice?.Id,
@@ -186,6 +188,17 @@ namespace BTCPayServer.Controllers
                     cancellationToken);
                 return RedirectToAction(nameof(InvoiceController.Checkout), "Invoice", new { invoiceId = invoice.Data.Id });
             }
+            catch (BitpayHttpException e)
+            {
+                TempData.SetStatusMessageModel(new StatusMessageModel() 
+                { 
+                    Html = e.Message.Replace("\n", "<br />", StringComparison.OrdinalIgnoreCase),
+                    Severity = StatusMessageModel.StatusSeverity.Error,
+                    AllowDismiss = true
+                });
+                return RedirectToAction(nameof(ViewPointOfSale), new { appId = appId });
+            }
+        }
 
         [HttpGet]
         [Route("/apps/{appId}/crowdfund")]

BTCPayServer/Views/AppsPublic/ViewPointOfSale.cshtml

@@ -185,6 +185,10 @@
             </td>
         </tr>
     </script>
+    @if (this.TempData.HasStatusMessage())
+    {
+        <partial name="_StatusMessage" />
+    }
 
     @if (Model.EnableShoppingCart)
     {