Currency dropdown as part of page model

BTCPayServer/Controllers/AppsController.PointOfSale.cs

@@ -290,13 +290,21 @@ namespace BTCPayServer.Controllers
                 return NotFound();
             var settings = app.GetSettings<PointOfSaleSettings>();
 
+            var store = await GetStore(app);
+            var paymentMethods = store.GetSupportedPaymentMethods(_NetworkProvider)
+                .Select(a=>a.PaymentId.ToString()).ToList();
+
+            var currencyDropdown = new List<string>();
+            currencyDropdown.Add(settings.Currency);
+            currencyDropdown.AddRange(paymentMethods);
 
             var model = new PayButtonViewModel
             {
                 Price = 10,
                 Currency = settings.Currency,
                 ButtonSize = 2,
-                UrlRoot = "http://127.0.0.1:14142"
+                UrlRoot = "http://127.0.0.1:14142",
+                CurrencyDropdown = currencyDropdown
             };
             return View(model);
         }

BTCPayServer/Controllers/AppsController.cs

@@ -24,6 +24,7 @@ namespace BTCPayServer.Controllers
         UserManager<ApplicationUser> _UserManager;
         CurrencyNameTable _Currencies;
         InvoiceController _InvoiceController;
+        BTCPayNetworkProvider _NetworkProvider;
 
         [TempData]
         public string StatusMessage { get; set; }
@@ -32,12 +33,14 @@ namespace BTCPayServer.Controllers
             UserManager<ApplicationUser> userManager,
             ApplicationDbContextFactory contextFactory,
             CurrencyNameTable currencies,
-            InvoiceController invoiceController)
+            InvoiceController invoiceController,
+            BTCPayNetworkProvider networkProvider)
         {
             _InvoiceController = invoiceController;
             _UserManager = userManager;
             _ContextFactory = contextFactory;
             _Currencies = currencies;
+            _NetworkProvider = networkProvider;
         }
         public async Task<IActionResult> ListApps()
         {

BTCPayServer/Models/AppViewModels/PayButtonViewModel.cs

@@ -18,5 +18,6 @@ namespace BTCPayServer.Models.AppViewModels
 
         //
         public string UrlRoot { get; set; }
+        public List<string> CurrencyDropdown { get; set; }
     }
 }

BTCPayServer/Views/Apps/PayButton.cshtml

@@ -22,8 +22,12 @@
                     </div>
                     <div class="form-group col-md-4">
                         <label>&nbsp;</label>
-                        <input type="text" class="form-control"
-                               v-model="srvModel.currency" v-on:change="inputChanges">
+                        <select class="form-control" v-model="srvModel.currency" v-on:change="inputChanges">
+                            @foreach(var item in Model.CurrencyDropdown)
+                            {
+                                <option>@item</option>
+                            }
+                        </select>
                     </div>
                 </div>
                 <div class="form-group">