Apply taxes and set receipt properly for PoS Print View

BTCPayServer.Tests/POSTests.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Linq;
 using System.Net.Http;
+using System.Text.RegularExpressions;
 using System.Threading.Tasks;
 using BTCPayServer.Client;
 using BTCPayServer.Client.Models;
@@ -13,8 +14,10 @@ using BTCPayServer.Plugins.PointOfSale.Controllers;
 using BTCPayServer.Plugins.PointOfSale.Models;
 using BTCPayServer.Services.Apps;
 using BTCPayServer.Views.Stores;
+using LNURL;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.Playwright;
+using Newtonsoft.Json;
 using Newtonsoft.Json.Linq;
 using Xunit;
 using Xunit.Abstractions;
@@ -477,20 +480,19 @@ goodies:
 
         [Fact]
         [Trait("Playwright", "Playwright")]
+        [Trait("Lightning", "Lightning")]
         public async Task CanUsePOSProductList()
         {
             await using var s = CreatePlaywrightTester();
+            s.Server.ActivateLightning();
             await s.StartAsync();
-
+            await s.RegisterNewUser(true);
-            await s.RegisterNewUser();
-            s.AsTestAccount();
-            await s.GoToHome();
             await s.CreateNewStore();
-            await s.GoToStore();
             await s.AddDerivationScheme();
+            await s.AddLightningNode();
 
             // Let's check Custom amount works as expected
-            await s.CreateApp("PointOfSale");
+            var (_, appId) = await s.CreateApp("PointOfSale");
             var appUrl = s.Page.Url;
             await s.Page.FillAsync("#Currency", "BTC");
             await s.Page.SetCheckedAsync("#ShowCustomAmount", true);
@@ -538,6 +540,41 @@ goodies:
                 await s.ClickPagePrimary();
                 await AssertInvoiceAmount(s, "1.50000000 BTC");
             }
+
+            await s.Page.FillAsync("#DefaultTaxRate", "10");
+            await s.ClickPagePrimary();
+
+            await GoToLNUrlCheckout(s, appId, "black-tea");
+            await AssertInvoiceAmount(s, "1.10000000 BTC");
+            await s.MarkAsSettled();
+
+            await s.Page.ClickAsync("#ReceiptLink");
+            await AssertReceipt(s, new()
+            {
+                Items = [
+                    new("BlackTea", "1.00000000 BTC"),
+                ],
+                Sums = [
+                    new("Subtotal", "1.00000000 BTC"),
+                    new("Tax", "0.10000000 BTC (10%)"),
+                    new("Total", "1.10000000 BTC")
+                ]
+            });
+
+            await GoToLNUrlCheckout(s, appId, "fruit-tea");
+            await AssertInvoiceAmount(s, "Any amount");
+
+            await GoToLNUrlCheckout(s, appId, "");
+            await AssertInvoiceAmount(s, "Any amount");
+        }
+
+        private static async Task GoToLNUrlCheckout(PlaywrightTester s, string appId, string item)
+        {
+            var result = await s.Server.PayTester.HttpClient.GetStringAsync($"BTC/lnurl/pay/app/{appId}/{item}");
+            var req = JsonConvert.DeserializeObject<LNURLPayRequest>(result);
+            var invoiceId = Regex.Replace(req.Callback.AbsoluteUri, ".*/pay/i/(.*)", "$1");
+            s.InvoiceId = invoiceId;
+            await s.GoToInvoiceCheckout();
         }
 
         private static async Task AssertInvoiceAmount(PlaywrightTester s, string expectedAmount)
@@ -634,12 +671,10 @@ goodies:
             await AssertReceipt(s, new()
             {
                 Items = [
-
                     new("Custom Amount 1", "1 234,00 €"),
                     new("Custom Amount 2", "0,56 €")
                 ],
                 Sums = [
-
                     new("Items total", "1 234,56 €"),
                     new("Discount", "123,46 € (10%)"),
                     new("Subtotal", "1 111,10 €"),

BTCPayServer.Tests/PlaywrightTester.cs

@@ -7,6 +7,9 @@ using System.Threading.Tasks;
 using BTCPayServer.Abstractions.Extensions;
 using BTCPayServer.Abstractions.Models;
 using BTCPayServer.Blazor.VaultBridge.Elements;
+using BTCPayServer.Client.Models;
+using BTCPayServer.Lightning;
+using BTCPayServer.Lightning.CLightning;
 using BTCPayServer.Views.Manage;
 using BTCPayServer.Views.Server;
 using BTCPayServer.Views.Stores;
@@ -15,6 +18,7 @@ using Microsoft.Extensions.Configuration;
 using Microsoft.Playwright;
 using NBitcoin;
 using NBitcoin.RPC;
+using OpenQA.Selenium;
 using Xunit;
 
 namespace BTCPayServer.Tests
@@ -23,7 +27,7 @@ namespace BTCPayServer.Tests
     {
         public Uri ServerUri;
         private string CreatedUser;
-        private string InvoiceId;
+        internal string InvoiceId;
         public Logging.ILog TestLogs => Server.TestLogs;
         public IPage Page { get; set; }
         public IBrowser Browser { get; private set; }
@@ -107,9 +111,7 @@ namespace BTCPayServer.Tests
         public async Task GoToInvoiceCheckout(string invoiceId = null)
         {
             invoiceId ??= InvoiceId;
-            await Page.Locator("#StoreNav-Invoices").ClickAsync();
+            await GoToUrl($"/i/{invoiceId}");
-            await Page.Locator($"#invoice-checkout-{invoiceId}").ClickAsync();
-            await Page.Locator("#Checkout").WaitForAsync();
         }
 
         public async Task GoToWallet(WalletId walletId = null, WalletsNavPages navPages = WalletsNavPages.Send)
@@ -380,6 +382,61 @@ namespace BTCPayServer.Tests
             await FindAlertMessage();
         }
 
+        public async Task AddLightningNode(string connectionType = null, bool test = true)
+        {
+            var cryptoCode = "BTC";
+            if (!(await Page.ContentAsync()).Contains("Connect to a Lightning node"))
+            {
+                await GoToLightningSettings();
+            }
+
+            var connectionString = connectionType switch
+            {
+                LightningConnectionType.CLightning =>
+                    $"type=clightning;server={((CLightningClient)Server.MerchantLightningD).Address.AbsoluteUri}",
+                LightningConnectionType.LndREST =>
+                    $"type=lnd-rest;server={Server.MerchantLnd.Swagger.BaseUrl};allowinsecure=true",
+                _ => null
+            };
+
+            if (connectionString == null)
+            {
+                Assert.True(await Page.IsEnabledAsync("#LightningNodeType-Internal"), "Usage of the internal Lightning node is disabled.");
+                await Page.ClickAsync("label[for=\"LightningNodeType-Internal\"]");
+            }
+            else
+            {
+                await Page.ClickAsync("label[for=\"LightningNodeType-Custom\"]");
+                await Page.FillAsync("#ConnectionString", connectionString);
+                if (test)
+                {
+                    await Page.ClickAsync("#test");
+                    await FindAlertMessage(partialText: "Connection to the Lightning node successful.");
+                }
+            }
+
+            await ClickPagePrimary();
+            await FindAlertMessage(partialText: $"{cryptoCode} Lightning node updated.");
+
+            var enabled = await Page.WaitForSelectorAsync($"#{cryptoCode}LightningEnabled");
+            if (!await enabled!.IsCheckedAsync())
+            {
+                await enabled.ClickAsync();
+                await ClickPagePrimary();
+                await FindAlertMessage(partialText: $"{cryptoCode} Lightning settings successfully updated");
+            }
+        }
+
+        public async Task GoToLightningSettings(string cryptoCode = "BTC")
+        {
+            await Page.ClickAsync($"#StoreNav-Lightning{cryptoCode}");
+            // if Lightning is already set up we need to navigate to the settings
+            if ((await Page.ContentAsync()).Contains("id=\"StoreNav-LightningSettings\""))
+            {
+                await Page.ClickAsync("#StoreNav-LightningSettings");
+            }
+        }
+
         public async Task ClickPagePrimary()
         {
             await Page.Locator("#page-primary").ClickAsync();
@@ -628,5 +685,12 @@ namespace BTCPayServer.Tests
 
             public Task SetFeeRate(decimal val) => page.FillAsync("[name=\"FeeSatoshiPerByte\"]", val.ToString(CultureInfo.InvariantCulture));
         }
+
+        public async Task MarkAsSettled()
+        {
+            var txId = Regex.Replace(Page.Url, ".*/(.*)$", "$1");
+            var client = await this.AsTestAccount().CreateClient();
+            await client.MarkInvoiceStatus(StoreId, txId, new() { Status = InvoiceStatus.Settled });
+        }
     }
 }

BTCPayServer/Controllers/UIInvoiceController.UI.cs

@@ -45,6 +45,7 @@ namespace BTCPayServer.Controllers
                 typeof(InvoiceMetadata)
                 .GetProperties()
                 .Select(p => p.Name)
+                .Where(p => p != "ReceiptData")
                 .ToHashSet(StringComparer.OrdinalIgnoreCase);
             InvoiceAdditionalDataExclude.Remove(nameof(InvoiceMetadata.PosData));
         }

BTCPayServer/Controllers/UILNURLController.cs

@@ -34,6 +34,7 @@ using BTCPayServer.Services.Stores;
 using LNURL;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Cors;
+using Microsoft.AspNetCore.Http.Extensions;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.AspNetCore.Routing;
 using Microsoft.Extensions.Localization;
@@ -62,6 +63,8 @@ namespace BTCPayServer
         private readonly InvoiceActivator _invoiceActivator;
         private readonly PaymentMethodHandlerDictionary _handlers;
         private readonly PayoutProcessorService _payoutProcessorService;
+        private readonly CurrencyNameTable _currencies;
+        private readonly DisplayFormatter _displayFormatter;
         public IStringLocalizer StringLocalizer { get; }
 
         public UILNURLController(InvoiceRepository invoiceRepository,
@@ -78,8 +81,11 @@ namespace BTCPayServer
             BTCPayNetworkJsonSerializerSettings btcPayNetworkJsonSerializerSettings,
             IPluginHookService pluginHookService,
             IStringLocalizer stringLocalizer,
-            InvoiceActivator invoiceActivator)
+            InvoiceActivator invoiceActivator,
+            CurrencyNameTable currencies, DisplayFormatter displayFormatter)
         {
+            _currencies = currencies;
+            _displayFormatter = displayFormatter;
             _invoiceRepository = invoiceRepository;
             _eventAggregator = eventAggregator;
             _payoutHandlers = payoutHandlers;
@@ -112,7 +118,7 @@ namespace BTCPayServer
             {
                 return NotFound();
             }
-            
+
             var pmi = PayoutTypes.LN.GetPayoutMethodId(cryptoCode);
             var paymentMethodId = PaymentTypes.LN.GetPaymentMethodId(cryptoCode);
             var pp = await _pullPaymentHostedService.GetPullPayment(pullPaymentId, true);
@@ -264,31 +270,17 @@ namespace BTCPayServer
             return network;
         }
 
-        [HttpGet("pay/app/{appId}/{itemCode}")]
+        [HttpGet("pay/app/{appId}/{itemCode?}")]
         public async Task<IActionResult> GetLNURLForApp(string cryptoCode, string appId, string itemCode = null)
         {
             var network = GetNetwork(cryptoCode);
-            if (network is null || !network.SupportLightning)
-            {
-                return NotFound();
-            }
-
             var app = await _appService.GetApp(appId, null, true);
-            if (app is null)
+            var store = app?.StoreData;
-            {
-                return NotFound();
-            }
-
-            var store = app.StoreData;
             if (store is null)
-            {
                 return NotFound();
-            }
+            if (network?.SupportLightning is not true ||
-
+                GetLNUrlPaymentMethodId(cryptoCode, store, out _) is null)
-            if (string.IsNullOrEmpty(itemCode))
+                return NotFound(StringLocalizer["LNURL or LN is disabled"]);
-            {
-                return NotFound();
-            }
 
             AppItem[] items;
             string currencyCode;
@@ -313,9 +305,6 @@ namespace BTCPayServer
             AppItem item = null;
             if (!string.IsNullOrEmpty(itemCode))
             {
-                var pmi = GetLNUrlPaymentMethodId(cryptoCode, store, out _);
-                if (pmi is null)
-                    return NotFound(StringLocalizer["LNURL or LN is disabled"]);
                 var escapedItemId = Extensions.UnescapeBackSlashUriString(itemCode);
                 item = items.FirstOrDefault(item1 =>
                     item1.Id.Equals(itemCode, StringComparison.InvariantCultureIgnoreCase) ||
@@ -329,9 +318,22 @@ namespace BTCPayServer
                 return NotFound();
             }
 
+            var order = new PoSOrder(_currencies.GetNumberFormatInfo(currencyCode, true).CurrencyDecimalDigits);
+
+            var posAppData = new PosAppData();
+            posAppData.Cart = [];
+            if (item != null)
+            {
+                posAppData.Cart = new PosAppCartItem[] { new() { Id = item.Id, Count = 1, Price = item.Price ?? 0 } };
+                order.AddLine(new(item.Id ?? "", 1, item.Price ?? 0m, item.TaxRate ?? posS?.DefaultTaxRate ?? 0m));
+            }
+
+            var summary = order.Calculate();
+            var isTopup = item is null or { PriceType: AppItemPriceType.Topup } or { Price: null };
+            var receiptData = PosReceiptData.Create(isTopup, item is {} ? new[]{ item } : [], posAppData, order, summary, currencyCode, _displayFormatter);
             var createInvoice = new CreateInvoiceRequest
             {
-                Amount =  item?.PriceType == AppItemPriceType.Topup ? null : item?.Price,
+                Amount =  isTopup ? null : summary.PriceTaxIncludedWithTips,
                 Currency = currencyCode,
                 Checkout = new InvoiceDataBase.CheckoutOptions
                 {
@@ -342,17 +344,20 @@ namespace BTCPayServer
                         _ => null
                     }
                 },
+                Metadata = new InvoiceMetadata
+                {
+                    ItemCode = item?.Id,
+                    ItemDesc = item?.Title,
+                    TaxIncluded = summary.Tax == 0m ? null : summary.Tax,
+                    OrderId = AppService.GetRandomOrderId(),
+                    OrderUrl = Request.GetDisplayUrl(),
+                    PosData = JObject.FromObject(posAppData),
+                    ReceiptData = receiptData
+                }.ToJObject(),
                 AdditionalSearchTerms = new[] { AppService.GetAppSearchTerm(app) }
             };
 
             var allowOverpay = item?.PriceType is not AppItemPriceType.Fixed;
-            var invoiceMetadata = new InvoiceMetadata { OrderId = AppService.GetRandomOrderId() };
-            if (item != null)
-            {
-                invoiceMetadata.ItemCode = item.Id;
-                invoiceMetadata.ItemDesc = item.Description;
-            }
-            createInvoice.Metadata = invoiceMetadata.ToJObject();
 
             return await GetLNURLRequest(
                 cryptoCode,
@@ -406,7 +411,7 @@ namespace BTCPayServer
         {
             if (string.IsNullOrEmpty(username))
                 return NotFound("Unknown username");
-            
+
             LNURLPayRequest lnurlRequest;
 
             // Check core and fall back to lookup Lightning Address via plugins
@@ -425,7 +430,7 @@ namespace BTCPayServer
                 var store = await _storeRepository.FindStore(lightningAddressSettings.StoreDataId);
                 if (store is null)
                     return NotFound("Unknown username");
-            
+
                 var cryptoCode = "BTC";
                 if (GetLNUrlPaymentMethodId(cryptoCode, store, out var lnUrlMethod) is null)
                     return NotFound("LNURL not available for store");
@@ -503,8 +508,8 @@ namespace BTCPayServer
         public async Task<IActionResult> GetLNUrlForStore(
             string cryptoCode,
             string storeId,
-            string currency = null, 
+            string currency = null,
-            string orderId = null, 
+            string orderId = null,
             decimal? amount = null)
         {
             var store = await _storeRepository.FindStore(storeId);

BTCPayServer/Plugins/PointOfSale/Controllers/UIPointOfSaleController.cs

@@ -321,54 +321,11 @@ namespace BTCPayServer.Plugins.PointOfSale.Controllers
                     break;
             }
 
-            var receiptData = new PosReceiptData();
             var summary = order.Calculate();
-
             var isTopup = currentView == PosViewType.Static &&
                           selectedChoices.Any(c => c.PriceType == AppItemPriceType.Topup);
-            if (!isTopup)
-            {
-                jposData.ItemsTotal = summary.ItemsTotal;
-                jposData.DiscountAmount = summary.Discount;
-                jposData.Subtotal = summary.PriceTaxExcluded;
-                jposData.Tax = summary.Tax;
-                jposData.Tip = summary.Tip;
-                jposData.Total = summary.PriceTaxIncludedWithTips;
-                receiptData.Subtotal = _displayFormatter.Currency(jposData.Subtotal, settings.Currency, DisplayFormatter.CurrencyFormat.Symbol);
-
-                if (jposData.DiscountAmount > 0)
-                {
-                    var discountFormatted = _displayFormatter.Currency(jposData.DiscountAmount, settings.Currency, DisplayFormatter.CurrencyFormat.Symbol);
-                    receiptData.Discount = jposData.DiscountPercentage > 0 ? $"{discountFormatted} ({jposData.DiscountPercentage}%)" : discountFormatted;
-                }
-
-                if (jposData.Tip > 0)
-                {
-                    var tipFormatted = _displayFormatter.Currency(jposData.Tip, settings.Currency, DisplayFormatter.CurrencyFormat.Symbol);
-                    receiptData.Tip = jposData.TipPercentage > 0 ? $"{tipFormatted} ({jposData.TipPercentage}%)" : tipFormatted;
-                }
-
-                if (jposData.Tax > 0)
-                {
-                    var taxFormatted = _displayFormatter.Currency(jposData.Tax, settings.Currency, DisplayFormatter.CurrencyFormat.Symbol);
-                    if (order.GetTaxRate() is { } r)
-                        taxFormatted = $"{taxFormatted} ({r:0.######}%)";
-                    receiptData.Tax = taxFormatted;
-                }
-
-                if (jposData.ItemsTotal > 0)
-                {
-                    var itemsTotal = _displayFormatter.Currency(jposData.ItemsTotal, settings.Currency, DisplayFormatter.CurrencyFormat.Symbol);
-                    receiptData.ItemsTotal = itemsTotal;
-                }
-
-                receiptData.Total = _displayFormatter.Currency(jposData.Total, settings.Currency, DisplayFormatter.CurrencyFormat.Symbol);
-                if (receiptData.ItemsTotal == receiptData.Subtotal)
-                    receiptData.ItemsTotal = null;
-                if (receiptData.Subtotal == receiptData.Total)
-                    receiptData.Subtotal = null;
-            }
 
+            var receiptData = PosReceiptData.Create(isTopup, selectedChoices, jposData, order, summary, settings.Currency, _displayFormatter);
             try
             {
                 var invoice = await _invoiceController.CreateInvoiceCoreRaw(new CreateInvoiceRequest
@@ -381,7 +338,10 @@ namespace BTCPayServer.Plugins.PointOfSale.Controllers
                         ItemDesc = selectedChoices is [{} c2] ? c2.Title : null,
                         BuyerEmail = email,
                         TaxIncluded = summary.Tax == 0m ? null : summary.Tax,
-                        OrderId = orderId ?? AppService.GetRandomOrderId()
+                        OrderId = orderId ?? AppService.GetRandomOrderId(),
+                        OrderUrl = Request.GetDisplayUrl(),
+                        PosData = JObject.FromObject(jposData),
+                        ReceiptData = receiptData
                     }.ToJObject(),
                     Checkout = new InvoiceDataBase.CheckoutOptions()
                     {
@@ -400,45 +360,12 @@ namespace BTCPayServer.Plugins.PointOfSale.Controllers
                             string.IsNullOrEmpty(notificationUrl) ? settings.NotificationUrl : notificationUrl;
                         entity.FullNotifications = true;
                         entity.ExtendedNotifications = true;
-                        entity.Metadata.OrderUrl = Request.GetDisplayUrl();
+                        if (formResponseJObject is not null)
-                        entity.Metadata.PosData = JObject.FromObject(jposData);
-
-                        if (selectedChoices.Count == 1)
                         {
-                            receiptData.Title = selectedChoices[0].Title;
+                            var meta = entity.Metadata.ToJObject();
-                            if (!string.IsNullOrEmpty(selectedChoices[0].Description))
+                            meta.Merge(formResponseJObject);
-                                receiptData.Description = selectedChoices[0].Description;
+                            entity.Metadata = InvoiceMetadata.FromJObject(meta);
                         }
-
-                        Dictionary<string,string> cartData = null;
-                        foreach (var cartItem in jposData.Cart)
-                        {
-                            var selectedChoice = choices.FirstOrDefault(item => item.Id == cartItem.Id);
-                            if (selectedChoice is null)
-                                continue;
-                            var singlePrice = _displayFormatter.Currency(cartItem.Price, settings.Currency, DisplayFormatter.CurrencyFormat.Symbol);
-                            var totalPrice = _displayFormatter.Currency(cartItem.Price * cartItem.Count, settings.Currency, DisplayFormatter.CurrencyFormat.Symbol);
-                            var ident = selectedChoice.Title ?? selectedChoice.Id;
-                            var key = selectedChoice.PriceType == AppItemPriceType.Fixed ? ident : $"{ident} ({singlePrice})";
-                            cartData ??= new();
-                            cartData.Add(key, $"{cartItem.Count} x {singlePrice} = {totalPrice}");
-                        }
-
-                        for (var i = 0; i < (jposData.Amounts ?? []).Length; i++)
-                        {
-                            cartData ??= new();
-                            cartData.Add($"Custom Amount {i + 1}", _displayFormatter.Currency(jposData.Amounts[i], settings.Currency, DisplayFormatter.CurrencyFormat.Symbol));
-                        }
-
-                        receiptData.Cart = cartData;
-
-                        entity.Metadata.SetAdditionalData("receiptData", receiptData);
-
-                        if (formResponseJObject is null)
-                            return;
-                        var meta = entity.Metadata.ToJObject();
-                        meta.Merge(formResponseJObject);
-                        entity.Metadata = InvoiceMetadata.FromJObject(meta);
                     });
                 var data = new { invoiceId = invoice.Id };
                 if (wantsJson)

BTCPayServer/Services/Invoices/InvoiceEntity.cs

@@ -212,6 +212,13 @@ namespace BTCPayServer.Services.Invoices
         [JsonExtensionData]
         public IDictionary<string, JToken> AdditionalData { get; set; }
 
+        [JsonIgnore]
+        public PosReceiptData ReceiptData
+        {
+            get => this.GetAdditionalData<PosReceiptData>("receiptData");
+            set => this.SetAdditionalData("receiptData", value);
+        }
+
         public static InvoiceMetadata FromJObject(JObject jObject)
         {
             return jObject.ToObject<InvoiceMetadata>(MetadataSerializer);
@@ -940,7 +947,7 @@ namespace BTCPayServer.Services.Invoices
         /// An additional fee, hidden from UI, meant to be used when a payment method has a service provider which
         /// have a different way of converting the invoice's amount into the currency of the payment method.
         /// This fee can avoid under/over payments when this case happens.
-        /// 
+        ///
         /// You need to increment it with <see cref="AddTweakFee(decimal)"/> so that the tweak fee is also added to the <see cref="PaymentMethodFee"/>.
         /// </summary>
         [JsonConverter(typeof(NumericStringJsonConverter))]

BTCPayServer/Services/Invoices/PosAppData.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Globalization;
+using BTCPayServer.Plugins.PointOfSale;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Linq;
 
@@ -58,6 +59,16 @@ public class PosAppData
     public decimal Tip { get; set; }
     [JsonProperty(PropertyName = "total")]
     public decimal Total { get; set; }
+
+    internal void UpdateFrom(PoSOrder.OrderSummary summary)
+    {
+        ItemsTotal = summary.ItemsTotal;
+        DiscountAmount = summary.Discount;
+        Subtotal = summary.PriceTaxExcluded;
+        Tax = summary.Tax;
+        Tip = summary.Tip;
+        Total = summary.PriceTaxIncludedWithTips;
+    }
 }
 
 public class PosAppCartItem

BTCPayServer/Services/Invoices/PosReceiptData.cs

@@ -1,4 +1,7 @@
 using System.Collections.Generic;
+using System.Linq;
+using BTCPayServer.Client.Models;
+using BTCPayServer.Plugins.PointOfSale;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Linq;
 
@@ -16,4 +19,83 @@ public class PosReceiptData
     public string Total { get; set; }
     public string ItemsTotal { get; set; }
     public string Tax { get; set; }
+
+    void UpdateTotals(PosAppData appData, PoSOrder order, PoSOrder.OrderSummary summary, string currency, DisplayFormatter displayFormatter)
+    {
+        Subtotal = displayFormatter.Currency(summary.PriceTaxExcluded, currency, DisplayFormatter.CurrencyFormat.Symbol);
+
+        if (summary.Discount > 0)
+        {
+            var discountFormatted = displayFormatter.Currency(summary.Discount, currency, DisplayFormatter.CurrencyFormat.Symbol);
+            Discount = appData.DiscountPercentage > 0 ? $"{discountFormatted} ({appData.DiscountPercentage}%)" : discountFormatted;
+        }
+
+        if (summary.Tip > 0)
+        {
+            var tipFormatted = displayFormatter.Currency(summary.Tip, currency, DisplayFormatter.CurrencyFormat.Symbol);
+            Tip = appData.TipPercentage > 0 ? $"{tipFormatted} ({appData.TipPercentage}%)" : tipFormatted;
+        }
+
+        if (summary.Tax > 0)
+        {
+            var taxFormatted = displayFormatter.Currency(summary.Tax, currency, DisplayFormatter.CurrencyFormat.Symbol);
+            if (order.GetTaxRate() is { } r)
+                taxFormatted = $"{taxFormatted} ({r:0.######}%)";
+            Tax = taxFormatted;
+        }
+
+        if (summary.ItemsTotal > 0)
+        {
+            var itemsTotal = displayFormatter.Currency(summary.ItemsTotal, currency, DisplayFormatter.CurrencyFormat.Symbol);
+            ItemsTotal = itemsTotal;
+        }
+
+        Total = displayFormatter.Currency(summary.PriceTaxIncludedWithTips, currency, DisplayFormatter.CurrencyFormat.Symbol);
+        if (ItemsTotal == Subtotal)
+            ItemsTotal = null;
+        if (Subtotal == Total)
+            Subtotal = null;
+    }
+
+    void UpdateFromCart(IEnumerable<AppItem> appItems, PosAppData jposData, string currency, DisplayFormatter displayFormatter)
+    {
+        Dictionary<string,string> cartData = new();
+        foreach (var cartItem in jposData.Cart ?? [])
+        {
+            var selectedChoice = appItems.FirstOrDefault(item => item.Id == cartItem.Id);
+            if (selectedChoice is null)
+                continue;
+            if (jposData.Cart.Length == 1)
+            {
+                Title = selectedChoice.Title;
+                if (!string.IsNullOrEmpty(selectedChoice.Description))
+                    Description = selectedChoice.Description;
+            }
+
+            var singlePrice = displayFormatter.Currency(cartItem.Price, currency, DisplayFormatter.CurrencyFormat.Symbol);
+            var totalPrice = displayFormatter.Currency(cartItem.Price * cartItem.Count, currency, DisplayFormatter.CurrencyFormat.Symbol);
+            var ident = selectedChoice.Title ?? selectedChoice.Id;
+            var key = selectedChoice.PriceType == AppItemPriceType.Fixed ? ident : $"{ident} ({singlePrice})";
+            cartData.Add(key, $"{cartItem.Count} x {singlePrice} = {totalPrice}");
+        }
+
+        for (var i = 0; i < (jposData.Amounts ?? []).Length; i++)
+        {
+            cartData.Add($"Custom Amount {i + 1}", displayFormatter.Currency(jposData.Amounts[i], currency, DisplayFormatter.CurrencyFormat.Symbol));
+        }
+
+        Cart = cartData.Count > 0 ? cartData : null;
+    }
+
+    public static PosReceiptData Create(bool isTopup, IEnumerable<AppItem> choices, PosAppData jposData, PoSOrder order, PoSOrder.OrderSummary summary, string currency, DisplayFormatter displayFormatter)
+    {
+        var receiptData = new PosReceiptData();
+        if (!isTopup)
+        {
+            jposData.UpdateFrom(summary);
+            receiptData.UpdateTotals(jposData, order, summary, currency, displayFormatter);
+        }
+        receiptData.UpdateFromCart(choices, jposData, currency, displayFormatter);
+        return receiptData;
+    }
 }

btcpayserver.sln.DotSettings

@@ -2,6 +2,7 @@
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=BTC/@EntryIndexedValue">BTC</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=CPFP/@EntryIndexedValue">CPFP</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=HWI/@EntryIndexedValue">HWI</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=LN/@EntryIndexedValue">LN</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=LNURL/@EntryIndexedValue">LNURL</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=NB/@EntryIndexedValue">NBX</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/Abbreviations/=NBXplorer/@EntryIndexedValue">NBXplorer</s:String>