Can opt out required refund email from customer

BTCPayServer/Controllers/InvoiceController.UI.cs

@@ -232,6 +232,7 @@ namespace BTCPayServer.Controllers
                 OrderAmount = (accounting.TotalDue - accounting.NetworkFee).ToString(),
                 BtcDue = accounting.Due.ToString(),
                 CustomerEmail = invoice.RefundMail,
+                RequiresRefundEmail = storeBlob.RequiresRefundEmail,
                 ExpirationSeconds = Math.Max(0, (int)(invoice.ExpirationTime - DateTimeOffset.UtcNow).TotalSeconds),
                 MaxTimeSeconds = (int)(invoice.ExpirationTime - invoice.InvoiceTime).TotalSeconds,
                 MaxTimeMinutes = (int)(invoice.ExpirationTime - invoice.InvoiceTime).TotalMinutes,

BTCPayServer/Controllers/StoresController.cs

@@ -201,6 +201,7 @@ namespace BTCPayServer.Controllers
             vm.LightningMaxValue = storeBlob.LightningMaxValue?.ToString() ?? "";
             vm.OnChainMinValue = storeBlob.OnChainMinValue?.ToString() ?? "";
             vm.AllowCoinConversion = storeBlob.AllowCoinConversion;
+            vm.RequiresRefundEmail = storeBlob.RequiresRefundEmail;
             vm.CustomCSS = storeBlob.CustomCSS?.AbsoluteUri;
             vm.CustomLogo = storeBlob.CustomLogo?.AbsoluteUri;
             return View(vm);
@@ -247,6 +248,7 @@ namespace BTCPayServer.Controllers
             }
             blob.DefaultLang = model.DefaultLang;
             blob.AllowCoinConversion = model.AllowCoinConversion;
+            blob.RequiresRefundEmail = model.RequiresRefundEmail;
             blob.LightningMaxValue = lightningMaxValue;
             blob.OnChainMinValue = onchainMinValue;
             blob.CustomLogo = string.IsNullOrWhiteSpace(model.CustomLogo) ? null : new Uri(model.CustomLogo, UriKind.Absolute);

BTCPayServer/Data/StoreData.cs

@@ -214,6 +214,7 @@ namespace BTCPayServer.Data
         {
             InvoiceExpiration = 15;
             MonitoringExpiration = 60;
+            RequiresRefundEmail = true;
         }
         public bool NetworkFeeDisabled
         {
@@ -223,6 +224,9 @@ namespace BTCPayServer.Data
         {
             get; set;
         }
+
+        public bool RequiresRefundEmail { get; set; }
+
         public string DefaultLang { get; set; }
         [DefaultValue(60)]
         [JsonProperty(DefaultValueHandling = DefaultValueHandling.Populate)]

BTCPayServer/Models/InvoicingModels/PaymentModel.cs

@@ -24,6 +24,7 @@ namespace BTCPayServer.Models.InvoicingModels
         public string BtcAddress { get; set; }
         public string BtcDue { get; set; }
         public string CustomerEmail { get; set; }
+        public bool RequiresRefundEmail { get; set; }
         public int ExpirationSeconds { get; set; }
         public string Status { get; set; }
         public string MerchantRefLink { get; set; }

BTCPayServer/Models/StoreViewModels/CheckoutExperienceViewModel.cs

@@ -31,6 +31,12 @@ namespace BTCPayServer.Models.StoreViewModels
         [MaxLength(20)]
         public string LightningMaxValue { get; set; }
 
+        [Display(Name = "Requires a refund email")]
+        public bool RequiresRefundEmail
+        {
+            get; set;
+        }
+
         [Display(Name = "Do not propose on chain payment if the value of the invoice is below...")]
         [MaxLength(20)]
         public string OnChainMinValue { get; set; }

BTCPayServer/Views/Stores/CheckoutExperience.cshtml

@@ -38,6 +38,10 @@
                 <label asp-for="AllowCoinConversion"></label>
                 <input asp-for="AllowCoinConversion" type="checkbox" class="form-check" />
             </div>
+            <div class="form-group">
+                <label asp-for="RequiresRefundEmail"></label>
+                <input asp-for="RequiresRefundEmail" type="checkbox" class="form-check" />
+            </div>
             <div class="form-group">
                 <label asp-for="LightningMaxValue"></label>
                 <input asp-for="LightningMaxValue" class="form-control" />

BTCPayServer/wwwroot/checkout/js/core.js

@@ -108,7 +108,7 @@ $(document).ready(function () {
     if (srvModel.expirationSeconds > 0) {
         progressStart(srvModel.maxTimeSeconds); // Progress bar
 
-        if (!validateEmail(srvModel.customerEmail))
+        if (srvModel.requiresRefundEmail && !validateEmail(srvModel.customerEmail))
             emailForm(); // Email form Display
         else
             hideEmailForm();