Fix bug: Paying a lightning invoice might miss 1 satoshi due to rounding error

Bugfixing loading spinner when switching currency

.gitattributes

@@ -0,0 +1,17 @@
+# Set the default behavior, in case people don't have core.autocrlf set.
+* text=auto
+
+# Explicitly declare text files you want to always be normalized and converted
+# to native line endings on checkout.
+*.c text
+*.h text
+
+# Declare files that will always have CRLF line endings on checkout.
+*.sln text eol=crlf
+
+# Declare files that will always have CRLF line endings on checkout.
+*.sh text eol=lf
+
+# Denote all files that are truly binary and should not be modified.
+*.png binary
+*.jpg binary

.gitignore

@@ -287,3 +287,7 @@ __pycache__/
 *.odx.cs
 *.xsd.cs
 /BTCPayServer/Build/dockerfiles
+
+# Bundling JS/CSS
+BTCPayServer/wwwroot/bundles/*
+!BTCPayServer/wwwroot/bundles/.gitignore

BTCPayServer.Tests/BTCPayServer.Tests.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.5.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.6.1" />
     <PackageReference Include="xunit" Version="2.3.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.3.1" />
   </ItemGroup>

BTCPayServer.Tests/BTCPayServerTester.cs

@@ -84,6 +84,8 @@ namespace BTCPayServer.Tests
             config.AppendLine($"ltc.explorer.url={LTCNBXplorerUri.AbsoluteUri}");
             config.AppendLine($"ltc.explorer.cookiefile=0");
 
+            config.AppendLine($"internallightningnode={IntegratedLightning.AbsoluteUri}");
+
             if (Postgres != null)
                 config.AppendLine($"postgres=" + Postgres);
             var confPath = Path.Combine(chainDirectory, "settings.config");
@@ -91,8 +93,8 @@ namespace BTCPayServer.Tests
 
             ServerUri = new Uri("http://" + HostName + ":" + Port + "/");
 
+            Environment.SetEnvironmentVariable("ASPNETCORE_ENVIRONMENT", "Development");
             var conf = new DefaultConfiguration() { Logger = Logs.LogProvider.CreateLogger("Console") }.CreateConfiguration(new[] { "--datadir", _Directory, "--conf", confPath });
-
             _Host = new WebHostBuilder()
                     .UseConfiguration(conf)
                     .ConfigureServices(s =>
@@ -124,6 +126,7 @@ namespace BTCPayServer.Tests
             internal set;
         }
         public InvoiceRepository InvoiceRepository { get; private set; }
+        public Uri IntegratedLightning { get; internal set; }
 
         public T GetService<T>()
         {

BTCPayServer.Tests/ChargeTester.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using BTCPayServer.Payments.Lightning.CLightning;
+using NBitcoin;
+
+namespace BTCPayServer.Tests
+{
+    public class ChargeTester
+    {
+        private ServerTester _Parent;
+
+        public ChargeTester(ServerTester serverTester, string environmentName, string defaultValue, string defaultHost, Network network)
+        {
+            this._Parent = serverTester;
+            var url = serverTester.GetEnvironment(environmentName, defaultValue);
+            Client = new ChargeClient(new Uri(url), network);
+            P2PHost = _Parent.GetEnvironment(environmentName + "_HOST", defaultHost);
+        }        
+        public ChargeClient Client { get; set; }
+        public string P2PHost { get; }
+    }
+}

BTCPayServer.Tests/EclairTester.cs

@@ -1,37 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-using System.Threading.Tasks;
-using BTCPayServer.Eclair;
-
-namespace BTCPayServer.Tests
-{
-    public class EclairTester
-    {
-        ServerTester parent;
-        public EclairTester(ServerTester parent, string environmentName, string defaultRPC, string defaultHost)
-        {
-            this.parent = parent;
-            //RPC = new EclairRPCClient(new Uri(parent.GetEnvironment(environmentName, defaultRPC)), parent.Network);
-            P2PHost = parent.GetEnvironment(environmentName + "_HOST", defaultHost);
-        }
-
-        public EclairRPCClient RPC { get; }
-        public string P2PHost { get; }
-
-        NodeInfo _NodeInfo;
-        public async Task<NodeInfo> GetNodeInfoAsync()
-        {
-            if (_NodeInfo != null)
-                return _NodeInfo;
-            var info = await RPC.GetInfoAsync();
-            _NodeInfo = new NodeInfo(info.NodeId, P2PHost, info.Port);
-            return _NodeInfo;
-        }
-
-        public NodeInfo GetNodeInfo()
-        {
-            return GetNodeInfoAsync().GetAwaiter().GetResult();
-        }
-    }
-}

BTCPayServer.Tests/LightningDTester.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading.Tasks;
+using BTCPayServer.Payments.Lightning.CLightning;
+using BTCPayServer.Payments.Lightning.CLightning.RPC;
+using NBitcoin;
+
+namespace BTCPayServer.Tests
+{
+    public class LightningDTester
+    {
+        ServerTester parent;
+        public LightningDTester(ServerTester parent, string environmentName, string defaultRPC, string defaultHost, Network network)
+        {
+            this.parent = parent;
+            RPC = new CLightningRPCClient(new Uri(parent.GetEnvironment(environmentName, defaultRPC)), network);
+        }
+
+        public CLightningRPCClient RPC { get; }
+        public string P2PHost { get; }
+        
+    }
+}

BTCPayServer.Tests/Logging/Logs.cs

@@ -71,7 +71,11 @@ namespace BTCPayServer.Tests.Logging
         public void LogInformation(string msg)
         {
             if (msg != null)
-                _Helper.WriteLine(DateTimeOffset.UtcNow + " :" + Name + ":   " + msg);
+                try
+                {
+                    _Helper.WriteLine(DateTimeOffset.UtcNow + " :" + Name + ":   " + msg);
+                }
+                catch { }
         }
     }
     public class Logs

BTCPayServer.Tests/README.md

@@ -26,7 +26,7 @@ docker-compose down
 If you want to stop, and remove all existing data
 
 ```
-docker-compose down -v
+docker-compose down --v
 ```
 
 You can run the tests inside a container by running
@@ -35,14 +35,50 @@ You can run the tests inside a container by running
 docker-compose run --rm tests
 ```
 
-## Send commands to bitcoind
+## How to manually test payments
+
+### Using the test bitcoin-cli
 
 You can call bitcoin-cli inside the container with `docker exec`, for example, if you want to send `0.23111090` to `mohu16LH66ptoWGEL1GtP6KHTBJYXMWhEf`:
 ```
-docker exec -ti btcpayserver_dev_bitcoind bitcoin-cli -regtest -conf="/data/bitcoin.conf" -datadir="/data" sendtoaddress "mohu16LH66ptoWGEL1GtP6KHTBJYXMWhEf" 0.23111090
+./docker-bitcoin-cli.sh sendtoaddress "mohu16LH66ptoWGEL1GtP6KHTBJYXMWhEf" 0.23111090
 ```
 
 If you are using Powershell:
 ```
 .\docker-bitcoin-cli.ps1 sendtoaddress "mohu16LH66ptoWGEL1GtP6KHTBJYXMWhEf" 0.23111090
 ```
+
+### Using the test litecoin-cli
+
+Same as bitcoin-cli, but with `.\docker-litecoin-cli.ps1` and `.\docker-litecoin-cli.sh` instead. 
+
+### Using the test lightning-cli
+
+If you are using Linux:
+```
+./docker-customer-lightning-cli.sh pay lnbcrt100u1pd2e6uspp5ajnadvhazjrz55twd5k6yeg9u87wpw0q2fdr7g960yl5asv5fmnqdq9d3hkccqpxmedyrk0ehw5ueqx5e0r4qrrv74cewddfcvsxaawqz7634cmjj39sqwy5tvhz0hasktkk6t9pqfdh3edmf3z09zst5y7khv3rvxh8ctqqw6mwhh
+```
+
+If you are using Powershell:
+```
+.\docker-customer-lightning-cli.ps1 pay lnbcrt100u1pd2e6uspp5ajnadvhazjrz55twd5k6yeg9u87wpw0q2fdr7g960yl5asv5fmnqdq9d3hkccqpxmedyrk0ehw5ueqx5e0r4qrrv74cewddfcvsxaawqz7634cmjj39sqwy5tvhz0hasktkk6t9pqfdh3edmf3z09zst5y7khv3rvxh8ctqqw6mwhh
+```
+
+If you get this message:
+
+```
+{ "code" : 205, "message" : "Could not find a route", "data" : { "getroute_tries" : 1, "sendpay_tries" : 0 } }
+```
+
+Please, run the test `CanSetLightningServer`, this will establish a channel between the customer and the merchant, then, retry.
+
+## FAQ
+
+`docker-compose up dev` failed or tests are not passing, what should I do?
+
+1. Run `docker-compose down --v` (this will reset your test environment)
+2. Run `docker-compose pull` (this will ensure you have the lastest images)
+3. Run again with `docker-compose up dev`
+
+If you still have issues, try to restart docker.

BTCPayServer.Tests/ServerTester.cs

@@ -17,8 +17,8 @@ using System.Runtime.CompilerServices;
 using System.Text;
 using System.Threading.Tasks;
 using System.Threading;
-using BTCPayServer.Eclair;
 using System.Globalization;
+using BTCPayServer.Payments.Lightning.CLightning.RPC;
 
 namespace BTCPayServer.Tests
 {
@@ -55,49 +55,99 @@ namespace BTCPayServer.Tests
             ExplorerClient = new ExplorerClient(NetworkProvider.GetNetwork("BTC").NBXplorerNetwork, new Uri(GetEnvironment("TESTS_BTCNBXPLORERURL", "http://127.0.0.1:32838/")));
             LTCExplorerClient = new ExplorerClient(NetworkProvider.GetNetwork("LTC").NBXplorerNetwork, new Uri(GetEnvironment("TESTS_LTCNBXPLORERURL", "http://127.0.0.1:32838/")));
 
+            var btc = NetworkProvider.GetNetwork("BTC").NBitcoinNetwork;
+            CustomerLightningD = new CLightningRPCClient(new Uri(GetEnvironment("TEST_CUSTOMERLIGHTNINGD", "http://127.0.0.1:30992/")), btc);
+            MerchantCharge = new ChargeTester(this, "TEST_MERCHANTCHARGE", "http://api-token:foiewnccewuify@127.0.0.1:54938/", "merchant_lightningd", btc);
+
             PayTester = new BTCPayServerTester(Path.Combine(_Directory, "pay"))
             {
                 NBXplorerUri = ExplorerClient.Address,
                 LTCNBXplorerUri = LTCExplorerClient.Address,
-                Postgres = GetEnvironment("TESTS_POSTGRES", "User ID=postgres;Host=127.0.0.1;Port=39372;Database=btcpayserver")
+                Postgres = GetEnvironment("TESTS_POSTGRES", "User ID=postgres;Host=127.0.0.1;Port=39372;Database=btcpayserver"),
+                IntegratedLightning = MerchantCharge.Client.Uri
             };
             PayTester.Port = int.Parse(GetEnvironment("TESTS_PORT", Utils.FreeTcpPort().ToString(CultureInfo.InvariantCulture)), CultureInfo.InvariantCulture);
             PayTester.HostName = GetEnvironment("TESTS_HOSTNAME", "127.0.0.1");
             PayTester.Start();
-
-            MerchantEclair = new EclairTester(this, "TEST_ECLAIR1", "http://127.0.0.1:30992/", "eclair1");
-            CustomerEclair = new EclairTester(this, "TEST_ECLAIR2", "http://127.0.0.1:30993/", "eclair2");
         }
 
 
         /// <summary>
-        /// This will setup a channel going from customer to merchant
+        /// Connect a customer LN node to the merchant LN node
         /// </summary>
         public void PrepareLightning()
         {
             PrepareLightningAsync().GetAwaiter().GetResult();
         }
 
+
+        /// <summary>
+        /// Connect a customer LN node to the merchant LN node
+        /// </summary>
+        /// <returns></returns>
         public async Task PrepareLightningAsync()
         {
-            // Activate segwit
-            var blockCount = ExplorerNode.GetBlockCountAsync();
-            // Fetch node info, but that in cache
-            var merchant = MerchantEclair.GetNodeInfoAsync();
-            var customer = CustomerEclair.GetNodeInfoAsync();
-            var channels = CustomerEclair.RPC.ChannelsAsync();
-            var connect = CustomerEclair.RPC.ConnectAsync(merchant.Result);
-            await Task.WhenAll(blockCount, merchant, customer, channels, connect);
-
-            // Mine until segwit is activated
-            if (blockCount.Result <= 432)
+            while (true)
             {
-                ExplorerNode.Generate(433 - blockCount.Result);
+                var channel = (await CustomerLightningD.ListPeersAsync())
+                            .SelectMany(p => p.Channels)
+                            .FirstOrDefault();
+                switch (channel?.State)
+                {
+                    case null:
+                        var merchantInfo = await WaitLNSynched();
+                        var clightning = new NodeInfo(merchantInfo.Id, MerchantCharge.P2PHost, merchantInfo.Port);
+                        await CustomerLightningD.ConnectAsync(clightning);
+                        var address = await CustomerLightningD.NewAddressAsync();
+                        await ExplorerNode.SendToAddressAsync(address, Money.Coins(0.2m));
+                        ExplorerNode.Generate(1);
+                        await WaitLNSynched();
+                        await Task.Delay(1000);
+                        await CustomerLightningD.FundChannelAsync(clightning, Money.Satoshis(16777215));
+                        break;
+                    case "CHANNELD_AWAITING_LOCKIN":
+                        ExplorerNode.Generate(1);
+                        await WaitLNSynched();
+                        break;
+                    case "CHANNELD_NORMAL":
+                        return;
+                    default:
+                        throw new NotSupportedException(channel?.State ?? "");
+                }
             }
         }
 
-        public EclairTester MerchantEclair { get; set; }
-        public EclairTester CustomerEclair { get; set; }
+        private async Task<Payments.Lightning.CLightning.GetInfoResponse> WaitLNSynched()
+        {
+            while (true)
+            {
+                var merchantInfo = await MerchantCharge.Client.GetInfoAsync();
+                var blockCount = await ExplorerNode.GetBlockCountAsync();
+                if (merchantInfo.BlockHeight != blockCount)
+                {
+                    await Task.Delay(1000);
+                }
+                else
+                {
+                    return merchantInfo;
+                }
+            }
+        }
+
+        public void SendLightningPayment(Invoice invoice)
+        {
+            SendLightningPaymentAsync(invoice).GetAwaiter().GetResult();
+        }
+
+        public async Task SendLightningPaymentAsync(Invoice invoice)
+        {
+            var bolt11 = invoice.CryptoInfo.Where(o => o.PaymentUrls.BOLT11 != null).First().PaymentUrls.BOLT11;
+            bolt11 = bolt11.Replace("lightning:", "", StringComparison.OrdinalIgnoreCase);
+            await CustomerLightningD.SendAsync(bolt11);
+        }
+
+        public CLightningRPCClient CustomerLightningD { get; set; }
+        public ChargeTester MerchantCharge { get; private set; }
 
         internal string GetEnvironment(string variable, string defaultValue)
         {

BTCPayServer.Tests/TestAccount.cs

@@ -46,20 +46,30 @@ namespace BTCPayServer.Tests
             Assert.IsType<ViewResult>(await store.RequestPairing(pairingCode.ToString()));
             await store.Pair(pairingCode.ToString(), StoreId);
         }
-        public StoresController CreateStore(string cryptoCode = null)
+        public StoresController CreateStore()
         {
-            return CreateStoreAsync(cryptoCode).GetAwaiter().GetResult();
+            return CreateStoreAsync().GetAwaiter().GetResult();
         }
 
-        public string CryptoCode { get; set; } = "BTC";
-        public async Task<StoresController> CreateStoreAsync(string cryptoCode = null)
+        public async Task<StoresController> CreateStoreAsync()
         {
-            cryptoCode = cryptoCode ?? CryptoCode;
-            SupportedNetwork = parent.NetworkProvider.GetNetwork(cryptoCode);
-            ExtKey = new ExtKey().GetWif(SupportedNetwork.NBitcoinNetwork);
             var store = parent.PayTester.GetController<StoresController>(UserId);
             await store.CreateStore(new CreateStoreViewModel() { Name = "Test Store" });
             StoreId = store.CreatedStoreId;
+            return store;
+        }
+
+        public BTCPayNetwork SupportedNetwork { get; set; }
+
+        public void RegisterDerivationScheme(string crytoCode)
+        {
+            RegisterDerivationSchemeAsync(crytoCode).GetAwaiter().GetResult();
+        }
+        public async Task RegisterDerivationSchemeAsync(string cryptoCode)
+        {
+            SupportedNetwork = parent.NetworkProvider.GetNetwork(cryptoCode);
+            var store = parent.PayTester.GetController<StoresController>(UserId);
+            ExtKey = new ExtKey().GetWif(SupportedNetwork.NBitcoinNetwork);
             DerivationScheme = new DerivationStrategyFactory(SupportedNetwork.NBitcoinNetwork).Parse(ExtKey.Neuter().ToString() + "-[legacy]");
             var vm = (StoreViewModel)((ViewResult)await store.UpdateStore(StoreId)).Model;
             vm.SpeedPolicy = SpeedPolicy.MediumSpeed;
@@ -71,28 +81,7 @@ namespace BTCPayServer.Tests
                 DerivationSchemeFormat = "BTCPay",
                 DerivationScheme = DerivationScheme.ToString(),
                 Confirmation = true
-            }, "Save");
-            return store;
-        }
-
-        public BTCPayNetwork SupportedNetwork { get; set; }
-
-        public void RegisterDerivationScheme(string crytoCode)
-        {
-            RegisterDerivationSchemeAsync(crytoCode).GetAwaiter().GetResult();
-        }
-        public async Task RegisterDerivationSchemeAsync(string crytoCode)
-        {
-            var store = parent.PayTester.GetController<StoresController>(UserId);
-            var networkProvider = parent.PayTester.GetService<BTCPayNetworkProvider>();
-            var derivation = new DerivationStrategyFactory(networkProvider.GetNetwork(crytoCode).NBitcoinNetwork).Parse(ExtKey.Neuter().ToString() + "-[legacy]");
-            await store.AddDerivationScheme(StoreId, new DerivationSchemeViewModel()
-            {
-                CryptoCurrency = crytoCode,
-                DerivationSchemeFormat = crytoCode,
-                DerivationScheme = derivation.ToString(),
-                Confirmation = true
-            }, "Save");
+            });
         }
 
         public DerivationStrategyBase DerivationScheme { get; set; }
@@ -122,5 +111,20 @@ namespace BTCPayServer.Tests
         {
             get; set;
         }
+
+        public void RegisterLightningNode(string cryptoCode)
+        {
+            RegisterLightningNodeAsync(cryptoCode).GetAwaiter().GetResult();
+        }
+
+        public async Task RegisterLightningNodeAsync(string cryptoCode)
+        {
+            var storeController = parent.PayTester.GetController<StoresController>(UserId);
+            await storeController.AddLightningNode(StoreId, new LightningNodeViewModel()
+            {
+                CryptoCurrency = "BTC",
+                Url = parent.MerchantCharge.Client.Uri.AbsoluteUri
+            }, "save");
+        }
     }
 }

BTCPayServer.Tests/UnitTest1.cs

@@ -22,7 +22,6 @@ using BTCPayServer.Data;
 using Microsoft.EntityFrameworkCore;
 using BTCPayServer.Services.Rates;
 using Microsoft.Extensions.Caching.Memory;
-using BTCPayServer.Eclair;
 using System.Collections.Generic;
 using BTCPayServer.Models.StoreViewModels;
 using System.Threading.Tasks;
@@ -30,6 +29,7 @@ using System.Globalization;
 using BTCPayServer.Payments;
 using BTCPayServer.Payments.Bitcoin;
 using BTCPayServer.HostedServices;
+using BTCPayServer.Payments.Lightning;
 
 namespace BTCPayServer.Tests
 {
@@ -44,7 +44,7 @@ namespace BTCPayServer.Tests
         [Fact]
         public void CanCalculateCryptoDue2()
         {
-            var dummy = new Key().PubKey.GetAddress(Network.RegTest);
+            var dummy = new Key().PubKey.GetAddress(Network.RegTest).ToString();
 #pragma warning disable CS0618
             InvoiceEntity invoiceEntity = new InvoiceEntity();
             invoiceEntity.Payments = new System.Collections.Generic.List<PaymentEntity>();
@@ -181,7 +181,7 @@ namespace BTCPayServer.Tests
             Assert.Equal(Money.Coins(1.0m), accounting.CryptoPaid);
             Assert.Equal(Money.Coins(1.0m), accounting.Paid);
             Assert.Equal(Money.Coins(5.2m), accounting.TotalDue);
-            Assert.Equal(2, accounting.TxCount);
+            Assert.Equal(2, accounting.TxRequired);
 
             paymentMethod = entity.GetPaymentMethod(new PaymentMethodId("LTC", PaymentTypes.BTCLike), null);
             accounting = paymentMethod.Calculate();
@@ -199,7 +199,7 @@ namespace BTCPayServer.Tests
             Assert.Equal(Money.Coins(1.0m), accounting.CryptoPaid);
             Assert.Equal(Money.Coins(1.5m), accounting.Paid);
             Assert.Equal(Money.Coins(5.2m + 0.01m / 2), accounting.TotalDue); // The fee for LTC added
-            Assert.Equal(2, accounting.TxCount);
+            Assert.Equal(2, accounting.TxRequired);
 
             paymentMethod = entity.GetPaymentMethod(new PaymentMethodId("LTC", PaymentTypes.BTCLike), null);
             accounting = paymentMethod.Calculate();
@@ -207,7 +207,7 @@ namespace BTCPayServer.Tests
             Assert.Equal(Money.Coins(1.0m), accounting.CryptoPaid);
             Assert.Equal(Money.Coins(3.0m), accounting.Paid);
             Assert.Equal(Money.Coins(10.01m + 0.1m * 2 + 0.01m), accounting.TotalDue);
-            Assert.Equal(2, accounting.TxCount);
+            Assert.Equal(2, accounting.TxRequired);
 
             var remaining = Money.Coins(4.2m - 0.5m + 0.01m / 2);
             entity.Payments.Add(new PaymentEntity() { CryptoCode = "BTC", Output = new TxOut(remaining, new Key()), Accounted = true });
@@ -219,7 +219,7 @@ namespace BTCPayServer.Tests
             Assert.Equal(Money.Coins(1.5m) + remaining, accounting.Paid);
             Assert.Equal(Money.Coins(5.2m + 0.01m / 2), accounting.TotalDue);
             Assert.Equal(accounting.Paid, accounting.TotalDue);
-            Assert.Equal(2, accounting.TxCount);
+            Assert.Equal(2, accounting.TxRequired);
 
             paymentMethod = entity.GetPaymentMethod(new PaymentMethodId("LTC", PaymentTypes.BTCLike), null);
             accounting = paymentMethod.Calculate();
@@ -228,7 +228,7 @@ namespace BTCPayServer.Tests
             Assert.Equal(Money.Coins(3.0m) + remaining * 2, accounting.Paid);
             // Paying 2 BTC fee, LTC fee removed because fully paid
             Assert.Equal(Money.Coins(10.01m + 0.1m * 2 + 0.1m * 2 /* + 0.01m no need to pay this fee anymore */), accounting.TotalDue);
-            Assert.Equal(1, accounting.TxCount);
+            Assert.Equal(1, accounting.TxRequired);
             Assert.Equal(accounting.Paid, accounting.TotalDue);
 #pragma warning restore CS0618
         }
@@ -241,6 +241,7 @@ namespace BTCPayServer.Tests
                 tester.Start();
                 var user = tester.NewAccount();
                 user.GrantAccess();
+                user.RegisterDerivationScheme("BTC");
                 var invoice = user.BitPay.CreateInvoice(new Invoice()
                 {
                     Buyer = new Buyer() { email = "test@fwf.com" },
@@ -286,18 +287,100 @@ namespace BTCPayServer.Tests
         {
             var light = LightMoney.MilliSatoshis(1);
             Assert.Equal("0.00000000001", light.ToString());
+
+            light = LightMoney.MilliSatoshis(200000);
+            Assert.Equal(200m, light.ToDecimal(LightMoneyUnit.Satoshi));
+            Assert.Equal(0.00000001m * 200m, light.ToDecimal(LightMoneyUnit.BTC));
         }
 
-        //[Fact]
-        //public void CanSendLightningPayment()
-        //{
+        [Fact]
+        public void CanSetLightningServer()
+        {
+            using (var tester = ServerTester.Create())
+            {
+                tester.Start();
+                var user = tester.NewAccount();
+                user.GrantAccess();
+                var storeController = tester.PayTester.GetController<StoresController>(user.UserId);
+                Assert.IsType<ViewResult>(storeController.UpdateStore(user.StoreId).GetAwaiter().GetResult());
+                Assert.IsType<ViewResult>(storeController.AddLightningNode(user.StoreId).GetAwaiter().GetResult());
 
-        //    using (var tester = ServerTester.Create())
-        //    {
-        //        tester.Start();
-        //        tester.PrepareLightning();
-        //    }
-        //}
+                var testResult = storeController.AddLightningNode(user.StoreId, new LightningNodeViewModel()
+                {
+                    CryptoCurrency = "BTC",
+                    Url = tester.MerchantCharge.Client.Uri.AbsoluteUri
+                }, "test").GetAwaiter().GetResult();
+                Assert.DoesNotContain("Error", ((LightningNodeViewModel)Assert.IsType<ViewResult>(testResult).Model).StatusMessage, StringComparison.OrdinalIgnoreCase);
+                Assert.True(storeController.ModelState.IsValid);
+
+                Assert.IsType<RedirectToActionResult>(storeController.AddLightningNode(user.StoreId, new LightningNodeViewModel()
+                {
+                    CryptoCurrency = "BTC",
+                    Url = tester.MerchantCharge.Client.Uri.AbsoluteUri
+                }, "save").GetAwaiter().GetResult());
+
+                var storeVm = Assert.IsType<Models.StoreViewModels.StoreViewModel>(Assert.IsType<ViewResult>(storeController.UpdateStore(user.StoreId).GetAwaiter().GetResult()).Model);
+                Assert.Single(storeVm.LightningNodes);
+            }
+        }
+
+        [Fact]
+        public void CanSendLightningPayment()
+        {
+
+            using (var tester = ServerTester.Create())
+            {
+                tester.Start();
+                tester.PrepareLightning();
+                var user = tester.NewAccount();
+                user.GrantAccess();
+                user.RegisterLightningNode("BTC");
+                user.RegisterDerivationScheme("BTC");
+
+                var invoice = user.BitPay.CreateInvoice(new Invoice()
+                {
+                    Price = 0.01,
+                    Currency = "USD",
+                    PosData = "posData",
+                    OrderId = "orderId",
+                    ItemDesc = "Some description"
+                });
+
+                tester.SendLightningPayment(invoice);
+
+                Eventually(() =>
+                {
+                    var localInvoice = user.BitPay.GetInvoice(invoice.Id);
+                    Assert.Equal("complete", localInvoice.Status);
+                    Assert.Equal("False", localInvoice.ExceptionStatus.ToString());
+                });
+
+
+                Task.WaitAll(Enumerable.Range(0, 5)
+                    .Select(_ => CanSendLightningPaymentCore(tester, user))
+                    .ToArray());
+            }
+        }
+
+        async Task CanSendLightningPaymentCore(ServerTester tester, TestAccount user)
+        {
+            await Task.Delay(TimeSpan.FromSeconds(RandomUtils.GetUInt32() % 5));
+            var invoice = await user.BitPay.CreateInvoiceAsync(new Invoice()
+            {
+                Price = 0.01,
+                Currency = "USD",
+                PosData = "posData",
+                OrderId = "orderId",
+                ItemDesc = "Some description"
+            });
+            await tester.SendLightningPaymentAsync(invoice);
+            await EventuallyAsync(async () =>
+            {
+                var localInvoice = await user.BitPay.GetInvoiceAsync(invoice.Id);
+                Assert.Equal("complete", localInvoice.Status);
+                Assert.Equal("False", localInvoice.ExceptionStatus.ToString());
+            });
+        }
 
         [Fact]
         public void CanUseServerInitiatedPairingCode()
@@ -334,6 +417,7 @@ namespace BTCPayServer.Tests
                     tester.Start();
                     var acc = tester.NewAccount();
                     acc.GrantAccess();
+                    acc.RegisterDerivationScheme("BTC");
                     var invoice = acc.BitPay.CreateInvoice(new Invoice()
                     {
                         Price = 5.0,
@@ -386,12 +470,12 @@ namespace BTCPayServer.Tests
                 tester.Start();
                 var user = tester.NewAccount();
                 user.GrantAccess();
+                user.RegisterDerivationScheme("BTC");
                 var invoice = user.BitPay.CreateInvoice(new Invoice()
                 {
                     Price = 5000.0,
                     Currency = "USD"
                 }, Facade.Merchant);
-
                 var payment1 = invoice.BtcDue + Money.Coins(0.0001m);
                 var payment2 = invoice.BtcDue;
                 var tx1 = new uint256(tester.ExplorerNode.SendCommand("sendtoaddress", new object[]
@@ -454,6 +538,7 @@ namespace BTCPayServer.Tests
                 var user = tester.NewAccount();
                 Assert.False(user.BitPay.TestAccess(Facade.Merchant));
                 user.GrantAccess();
+                user.RegisterDerivationScheme("BTC");
                 Assert.True(user.BitPay.TestAccess(Facade.Merchant));
             }
         }
@@ -467,7 +552,7 @@ namespace BTCPayServer.Tests
                 tester.Start();
                 var user = tester.NewAccount();
                 user.GrantAccess();
-
+                user.RegisterDerivationScheme("BTC");
 
                 // First we try payment with a merchant having only BTC
                 var invoice1 = user.BitPay.CreateInvoice(new Invoice()
@@ -509,8 +594,8 @@ namespace BTCPayServer.Tests
             {
                 tester.Start();
                 var user = tester.NewAccount();
-                user.CryptoCode = "LTC";
                 user.GrantAccess();
+                user.RegisterDerivationScheme("LTC");
 
                 // First we try payment with a merchant having only BTC
                 var invoice = user.BitPay.CreateInvoice(new Invoice()
@@ -569,7 +654,7 @@ namespace BTCPayServer.Tests
                 tester.Start();
                 var user = tester.NewAccount();
                 user.GrantAccess();
-
+                user.RegisterDerivationScheme("BTC");
                 // First we try payment with a merchant having only BTC
                 var invoice = user.BitPay.CreateInvoice(new Invoice()
                 {
@@ -658,6 +743,7 @@ namespace BTCPayServer.Tests
                 tester.Start();
                 var user = tester.NewAccount();
                 user.GrantAccess();
+                user.RegisterDerivationScheme("BTC");
                 var invoice = user.BitPay.CreateInvoice(new Invoice()
                 {
                     Price = 5000.0,
@@ -669,7 +755,7 @@ namespace BTCPayServer.Tests
                 }, Facade.Merchant);
                 var repo = tester.PayTester.GetService<InvoiceRepository>();
                 var ctx = tester.PayTester.GetService<ApplicationDbContextFactory>().CreateContext();
-
+                Assert.Equal(0, invoice.CryptoInfo[0].TxCount);
                 Eventually(() =>
                 {
                     var textSearchResult = tester.PayTester.InvoiceRepository.GetInvoices(new InvoiceQuery()
@@ -725,6 +811,7 @@ namespace BTCPayServer.Tests
                     Assert.Equal(firstPayment, localInvoice.BtcPaid);
                     txFee = localInvoice.BtcDue - invoice.BtcDue;
                     Assert.Equal("paidPartial", localInvoice.ExceptionStatus.ToString());
+                    Assert.Equal(1, localInvoice.CryptoInfo[0].TxCount);
                     Assert.NotEqual(localInvoice.BitcoinAddress, invoice.BitcoinAddress); //New address
                     Assert.True(IsMapped(invoice, ctx));
                     Assert.True(IsMapped(localInvoice, ctx));
@@ -744,6 +831,7 @@ namespace BTCPayServer.Tests
                 {
                     var localInvoice = user.BitPay.GetInvoice(invoice.Id, Facade.Merchant);
                     Assert.Equal("paid", localInvoice.Status);
+                    Assert.Equal(2, localInvoice.CryptoInfo[0].TxCount);
                     Assert.Equal(firstPayment + secondPayment, localInvoice.BtcPaid);
                     Assert.Equal(Money.Zero, localInvoice.BtcDue);
                     Assert.Equal(localInvoice.BitcoinAddress, invoiceAddress.ToString()); //no new address generated
@@ -844,5 +932,22 @@ namespace BTCPayServer.Tests
                 }
             }
         }
+
+        private async Task EventuallyAsync(Func<Task> act)
+        {
+            CancellationTokenSource cts = new CancellationTokenSource(20000);
+            while (true)
+            {
+                try
+                {
+                    await act();
+                    break;
+                }
+                catch (XunitException) when (!cts.Token.IsCancellationRequested)
+                {
+                    await Task.Delay(500);
+                }
+            }
+        }
     }
 }

BTCPayServer.Tests/docker-bitcoin-cli.ps1

@@ -1 +1 @@
-docker exec -ti btcpayserver_dev_bitcoind bitcoin-cli -regtest -conf="/data/bitcoin.conf" -datadir="/data" $args
+docker exec -ti btcpayservertests_bitcoind_1 bitcoin-cli -datadir="/data" $args

BTCPayServer.Tests/docker-bitcoin-cli.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+docker exec -ti btcpayservertests_bitcoind_1 bitcoin-cli -datadir="/data" "$@"

BTCPayServer.Tests/docker-compose.yml

@@ -1,7 +1,7 @@
 version: "3"    
 
 # Run `docker-compose up dev` for bootstrapping your development environment
-# Doing so will expose eclair API, NBXplorer, Bitcoind RPC and postgres port to the host so that tests can Run,
+# Doing so will expose NBXplorer, Bitcoind RPC and postgres port to the host so that tests can Run,
 # The Visual Studio launch setting `Docker-Regtest` is configured to use this environment.
 services:
 
@@ -17,17 +17,18 @@ services:
       TESTS_POSTGRES: User ID=postgres;Host=postgres;Port=5432;Database=btcpayserver
       TESTS_PORT: 80
       TESTS_HOSTNAME: tests
+      TEST_CUSTOMERLIGHTNINGD: http://customer_lightningd:9835/
+      TEST_MERCHANTCHARGE: http://api-token:foiewnccewuify@lightning-charged:9112/
     expose:
       - "80"
     links:
-      - nbxplorer
-      - postgres
+      - dev
     extra_hosts: 
       - "tests:127.0.0.1"
 
   # The dev container is not actually used, it is just handy to run `docker-compose up dev` to start all services
   dev: 
-    image: nicolasdorier/docker-bitcoin:0.15.0.1
+    image: nicolasdorier/docker-bitcoin:0.16.0
     environment:
       BITCOIN_EXTRA_ARGS: |
         regtest=1
@@ -35,9 +36,12 @@ services:
     links:
       - nbxplorer
       - postgres
+      - customer_lightningd
+      - merchant_lightningd
+      - lightning-charged
 
   nbxplorer:
-    image: nicolasdorier/nbxplorer:1.0.1.13
+    image: nicolasdorier/nbxplorer:1.0.1.22
     ports:
       - "32838:32838"
     expose: 
@@ -61,8 +65,7 @@ services:
       - litecoind
 
   bitcoind:
-    container_name: btcpayserver_dev_bitcoind
-    image: nicolasdorier/docker-bitcoin:0.15.0.1
+    image: nicolasdorier/docker-bitcoin:0.16.0
     environment:
       BITCOIN_EXTRA_ARGS: |
         rpcuser=ceiwHEbqWI83
@@ -77,9 +80,68 @@ services:
     expose:
       - "43782" # RPC
       - "39388" # P2P
+    volumes:
+      - "bitcoin_datadir:/data"
+
+  customer_lightningd:
+    image: nicolasdorier/clightning
+    environment: 
+      LIGHTNINGD_OPT: |
+        bitcoin-datadir=/etc/bitcoin
+        bitcoin-rpcconnect=bitcoind
+        network=regtest
+        log-level=debug
+    ports:
+      - "30992:9835" # api port
+    expose:
+      - "9735" # server port
+      - "9835" # api port
+    volumes:
+      - "bitcoin_datadir:/etc/bitcoin"
+      - "customer_lightningd_datadir:/root/.lightning"
+    links:
+      - bitcoind
+
+  lightning-charged:
+    image: shesek/lightning-charge:0.3.5
+    environment:
+      NETWORK: regtest
+      API_TOKEN: foiewnccewuify
+      SKIP_BITCOIND: 1
+      BITCOIND_RPCCONNECT: bitcoind
+    volumes:
+      - "bitcoin_datadir:/etc/bitcoin"
+      - "lightning_charge_datadir:/data"
+      - "merchant_lightningd_datadir:/etc/lightning"
+    expose:
+      - "9112" # Charge
+      - "9735" # Lightning
+    ports:
+      - "54938:9112" # Charge
+    links:
+      - bitcoind
+      - merchant_lightningd
+
+  merchant_lightningd:
+    image: nicolasdorier/clightning
+    environment: 
+      LIGHTNINGD_OPT: |
+        bitcoin-datadir=/etc/bitcoin
+        bitcoin-rpcconnect=bitcoind
+        network=regtest
+        log-level=debug
+    ports:
+      - "30993:9835" # api port
+    expose:
+      - "9735" # server port
+      - "9835" # api port
+    volumes:
+      - "bitcoin_datadir:/etc/bitcoin"
+      - "merchant_lightningd_datadir:/root/.lightning"
+    links:
+      - bitcoind
 
   litecoind:
-    container_name: btcpayserver_dev_litecoind
     image: nicolasdorier/docker-litecoin:0.14.2
     environment:
       BITCOIN_EXTRA_ARGS: |
@@ -102,3 +164,9 @@ services:
       - "39372:5432"
     expose:
       - "5432"
+
+volumes:
+    bitcoin_datadir:
+    customer_lightningd_datadir:
+    merchant_lightningd_datadir:
+    lightning_charge_datadir:

BTCPayServer.Tests/docker-customer-lightning-cli.ps1

@@ -0,0 +1 @@
+docker exec -ti btcpayservertests_customer_lightningd_1 lightning-cli $args

BTCPayServer.Tests/docker-customer-lightning-cli.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+docker exec -ti btcpayservertests_customer_lightningd_1 lightning-cli "$@"

BTCPayServer.Tests/docker-litecoin-cli.ps1

@@ -1 +1 @@
-docker exec -ti btcpayserver_dev_litecoind litecoin-cli -regtest -conf="/data/litecoin.conf" -datadir="/data" $args
+docker exec -ti btcpayservertests_litecoind_1 litecoin-cli -datadir="/data" $args

BTCPayServer.Tests/docker-litecoin-cli.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+docker exec -ti btcpayservertests_litecoind_1 litecoin-cli -datadir="/data" "$@"

BTCPayServer/BTCPayNetwork.cs

@@ -62,11 +62,13 @@ namespace BTCPayServer
         }
 
         public string CryptoImagePath { get; set; }
+        public string LightningImagePath { get; set; }
         public NBXplorer.NBXplorerNetwork NBXplorerNetwork { get; set; }
 
         public BTCPayDefaultSettings DefaultSettings { get; set; }
         public KeyPath CoinType { get; internal set; }
         public int MaxTrackedConfirmation { get; internal set; } = 6;
+        public string CLightningNetworkName { get; internal set; }
 
         public override string ToString()
         {

BTCPayServer/BTCPayNetworkProvider.Bitcoin.cs

@@ -20,14 +20,18 @@ namespace BTCPayServer
             Add(new BTCPayNetwork()
             {
                 CryptoCode = nbxplorerNetwork.CryptoCode,
-                BlockExplorerLink = NBXplorerNetworkProvider.ChainType == ChainType.Main? "https://www.smartbit.com.au/tx/{0}" : "https://testnet.smartbit.com.au/tx/{0}",
+                BlockExplorerLink = NBXplorerNetworkProvider.ChainType == ChainType.Main ? "https://www.smartbit.com.au/tx/{0}" : "https://testnet.smartbit.com.au/tx/{0}",
                 NBitcoinNetwork = nbxplorerNetwork.NBitcoinNetwork,
                 NBXplorerNetwork = nbxplorerNetwork,
                 UriScheme = "bitcoin",
                 DefaultRateProvider = btcRate,
                 CryptoImagePath = "imlegacy/bitcoin-symbol.svg",
+                LightningImagePath = "imlegacy/btc-lightning.svg",
                 DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NBXplorerNetworkProvider.ChainType),
-                CoinType = NBXplorerNetworkProvider.ChainType == ChainType.Main ? new KeyPath("0'") : new KeyPath("1'")
+                CoinType = NBXplorerNetworkProvider.ChainType == ChainType.Main ? new KeyPath("0'") : new KeyPath("1'"),
+                CLightningNetworkName = ChainType == ChainType.Main ? "bitcoin" :
+                                        ChainType == ChainType.Test ? "testnet" :
+                                        ChainType == ChainType.Regtest ? "regtest" : null
             });
         }
     }

BTCPayServer/BTCPayNetworkProvider.Litecoin.cs

@@ -25,8 +25,11 @@ namespace BTCPayServer
                 UriScheme = "litecoin",
                 DefaultRateProvider = ltcRate,
                 CryptoImagePath = "imlegacy/litecoin-symbol.svg",
+                LightningImagePath = "imlegacy/ltc-lightning.svg",
                 DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NBXplorerNetworkProvider.ChainType),
-                CoinType = NBXplorerNetworkProvider.ChainType == ChainType.Main ? new KeyPath("2'") : new KeyPath("3'")
+                CoinType = NBXplorerNetworkProvider.ChainType == ChainType.Main ? new KeyPath("2'") : new KeyPath("3'"),
+                CLightningNetworkName = ChainType == ChainType.Main ? "litecoin" :
+                                        ChainType == ChainType.Test ? "litecoin-testnet" : null
             });
         }
     }

BTCPayServer/BTCPayNetworkProvider.cs

@@ -25,13 +25,40 @@ namespace BTCPayServer
             }
         }
 
+        BTCPayNetworkProvider(BTCPayNetworkProvider filtered, string[] cryptoCodes)
+        {
+            ChainType = filtered.ChainType;
+            _NBXplorerNetworkProvider = new NBXplorerNetworkProvider(filtered.ChainType);
+            _Networks = new Dictionary<string, BTCPayNetwork>();
+            cryptoCodes = cryptoCodes.Select(c => c.ToUpperInvariant()).ToArray();
+            foreach (var network in filtered._Networks)
+            {
+                if(cryptoCodes.Contains(network.Key))
+                {
+                    _Networks.Add(network.Key, network.Value);
+                }
+            }
+        }
+
+        public ChainType ChainType { get; set; }
         public BTCPayNetworkProvider(ChainType chainType)
         {
             _NBXplorerNetworkProvider = new NBXplorerNetworkProvider(chainType);
+            ChainType = chainType;
             InitBitcoin();
             InitLitecoin();
         }
 
+        /// <summary>
+        /// Keep only the specified crypto
+        /// </summary>
+        /// <param name="cryptoCodes">Crypto to support</param>
+        /// <returns></returns>
+        public BTCPayNetworkProvider Filter(string[] cryptoCodes)
+        {
+            return new BTCPayNetworkProvider(this, cryptoCodes);
+        }
+
         [Obsolete("To use only for legacy stuff")]
         public BTCPayNetwork BTC
         {
@@ -43,7 +70,7 @@ namespace BTCPayServer
 
         public void Add(BTCPayNetwork network)
         {
-            _Networks.Add(network.CryptoCode, network);
+            _Networks.Add(network.CryptoCode.ToUpperInvariant(), network);
         }
 
         public IEnumerable<BTCPayNetwork> GetAll()
@@ -51,6 +78,11 @@ namespace BTCPayServer
             return _Networks.Values.ToArray();
         }
 
+        public bool Support(string cryptoCode)
+        {
+            return _Networks.ContainsKey(cryptoCode.ToUpperInvariant());
+        }
+
         public BTCPayNetwork GetNetwork(string cryptoCode)
         {
             _Networks.TryGetValue(cryptoCode.ToUpperInvariant(), out BTCPayNetwork network);

BTCPayServer/BTCPayServer.csproj

@@ -2,14 +2,18 @@
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>netcoreapp2.0</TargetFramework>
-		<Version>1.0.1.37</Version>
+		<Version>1.0.1.50</Version>
     <NoWarn>NU1701,CA1816,CA1308,CA1810,CA2208</NoWarn>
   </PropertyGroup>
   <ItemGroup>
     <Compile Remove="Build\dockerfiles\**" />
+    <Compile Remove="wwwroot\bundles\jqueryvalidate\**" />
     <Content Remove="Build\dockerfiles\**" />
+    <Content Remove="wwwroot\bundles\jqueryvalidate\**" />
     <EmbeddedResource Remove="Build\dockerfiles\**" />
+    <EmbeddedResource Remove="wwwroot\bundles\jqueryvalidate\**" />
     <None Remove="Build\dockerfiles\**" />
+    <None Remove="wwwroot\bundles\jqueryvalidate\**" />
   </ItemGroup>
   <ItemGroup>
     <None Remove="Currencies.txt" />
@@ -18,17 +22,19 @@
     <EmbeddedResource Include="Currencies.txt" />
   </ItemGroup>
   <ItemGroup>
+    <PackageReference Include="BuildBundlerMinifier" Version="2.6.362" />
     <PackageReference Include="Hangfire" Version="1.6.17" />
     <PackageReference Include="Hangfire.MemoryStorage" Version="1.5.2" />
     <PackageReference Include="Hangfire.PostgreSql" Version="1.4.8.1" />
     <PackageReference Include="LedgerWallet" Version="1.0.1.32" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="2.6.1" />
+    <PackageReference Include="Meziantou.AspNetCore.BundleTagHelpers" Version="1.0.1" />
     <PackageReference Include="Microsoft.Extensions.Logging.Filter" Version="1.1.2" />
     <PackageReference Include="Microsoft.NetCore.Analyzers" Version="2.6.0" />
-    <PackageReference Include="NBitcoin" Version="4.0.0.55" />
-    <PackageReference Include="NBitpayClient" Version="1.0.0.17" />	  
+    <PackageReference Include="NBitcoin" Version="4.0.0.65" />
+    <PackageReference Include="NBitpayClient" Version="1.0.0.18" />	  
     <PackageReference Include="DBreeze" Version="1.87.0" />
-    <PackageReference Include="NBXplorer.Client" Version="1.0.1.9" />
+    <PackageReference Include="NBXplorer.Client" Version="1.0.1.16" />
     <PackageReference Include="NicolasDorier.CommandLine" Version="1.0.0.1" />
     <PackageReference Include="NicolasDorier.CommandLine.Configuration" Version="1.0.0.2" />
     <PackageReference Include="NicolasDorier.StandardConfiguration" Version="1.0.0.13" />
@@ -102,6 +108,7 @@
 
 	<ItemGroup>
 	  <Folder Include="Build\" />
+	  <Folder Include="wwwroot\vendor\clipboard.js\" />
 	</ItemGroup>
 
 	<ItemGroup>

BTCPayServer/Configuration/BTCPayServerOptions.cs

@@ -58,28 +58,34 @@ namespace BTCPayServer.Configuration
             var supportedChains = conf.GetOrDefault<string>("chains", "btc")
                                       .Split(',', StringSplitOptions.RemoveEmptyEntries)
                                       .Select(t => t.ToUpperInvariant());
-            var validChains = new List<string>();
-            foreach (var net in new BTCPayNetworkProvider(ChainType).GetAll())
+            NetworkProvider = new BTCPayNetworkProvider(ChainType).Filter(supportedChains.ToArray());
+            foreach (var chain in supportedChains)
             {
-                if (supportedChains.Contains(net.CryptoCode))
-                {
-                    validChains.Add(net.CryptoCode);
-                    NBXplorerConnectionSetting setting = new NBXplorerConnectionSetting();
-                    setting.CryptoCode = net.CryptoCode;
-                    setting.ExplorerUri = conf.GetOrDefault<Uri>($"{net.CryptoCode}.explorer.url", net.NBXplorerNetwork.DefaultSettings.DefaultUrl);
-                    setting.CookieFile = conf.GetOrDefault<string>($"{net.CryptoCode}.explorer.cookiefile", net.NBXplorerNetwork.DefaultSettings.DefaultCookieFile);
-                    NBXplorerConnectionSettings.Add(setting);
-                }
+                if (NetworkProvider.GetNetwork(chain) == null)
+                    throw new ConfigException($"Invalid chains \"{chain}\"");
+            }
+
+            var validChains = new List<string>();
+            foreach (var net in NetworkProvider.GetAll())
+            {
+                NBXplorerConnectionSetting setting = new NBXplorerConnectionSetting();
+                setting.CryptoCode = net.CryptoCode;
+                setting.ExplorerUri = conf.GetOrDefault<Uri>($"{net.CryptoCode}.explorer.url", net.NBXplorerNetwork.DefaultSettings.DefaultUrl);
+                setting.CookieFile = conf.GetOrDefault<string>($"{net.CryptoCode}.explorer.cookiefile", net.NBXplorerNetwork.DefaultSettings.DefaultCookieFile);
+                NBXplorerConnectionSettings.Add(setting);
             }
-            var invalidChains = String.Join(',', supportedChains.Where(s => !validChains.Contains(s)).ToArray());
-            if(!string.IsNullOrEmpty(invalidChains))
-                throw new ConfigException($"Invalid chains {invalidChains}");
 
             Logs.Configuration.LogInformation("Supported chains: " + String.Join(',', supportedChains.ToArray()));
+
             PostgresConnectionString = conf.GetOrDefault<string>("postgres", null);
+            BundleJsCss = conf.GetOrDefault<bool>("bundlejscss", true);
             ExternalUrl = conf.GetOrDefault<Uri>("externalurl", null);
+            InternalLightningNode = conf.GetOrDefault<Uri>("internallightningnode", null);
         }
 
+        public Uri InternalLightningNode { get; set; }
+
+        public BTCPayNetworkProvider NetworkProvider { get; set; }
         public string PostgresConnectionString
         {
             get;
@@ -90,5 +96,10 @@ namespace BTCPayServer.Configuration
             get;
             set;
         }
+        public bool BundleJsCss
+        {
+            get;
+            set;
+        }
     }
 }

BTCPayServer/Configuration/ConfigurationExtensions.cs

@@ -27,7 +27,14 @@ namespace BTCPayServer.Configuration
                 throw new FormatException();
             }
             else if (typeof(T) == typeof(Uri))
-                return (T)(object)new Uri(str, UriKind.Absolute);
+                if (string.IsNullOrEmpty(str))
+                {
+                    return defaultValue;
+                }
+                else
+                {
+                    return (T)(object)new Uri(str, UriKind.Absolute);
+                }
             else if (typeof(T) == typeof(string))
                 return (T)(object)str;
             else if (typeof(T) == typeof(IPEndPoint))

BTCPayServer/Configuration/DefaultConfiguration.cs

@@ -38,6 +38,8 @@ namespace BTCPayServer.Configuration
                 app.Option($"--{crypto}explorercookiefile", $"Path to the cookie file (default: {network.NBXplorerNetwork.DefaultSettings.DefaultCookieFile})", CommandOptionType.SingleValue);
             }
             app.Option("--externalurl", $"The expected external url of this service, to use if BTCPay is behind a reverse proxy (default: empty, use the incoming HTTP request to figure out)", CommandOptionType.SingleValue);
+            app.Option("--internallightningnode", $"An internal lightning node which can be used without https requirement and easily configured by the admin (default: empty)", CommandOptionType.SingleValue);
+            app.Option("--bundlejscss", $"Bundle javascript and css files for better performance (default: true)", CommandOptionType.SingleValue);
             return app;
         }
 

BTCPayServer/Controllers/InvoiceController.PaymentProtocol.cs

@@ -10,6 +10,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using BTCPayServer.Services.Invoices;
+using BTCPayServer.Payments;
 
 namespace BTCPayServer.Controllers
 {
@@ -71,7 +72,7 @@ namespace BTCPayServer.Controllers
             if (cryptoCode == null)
                 cryptoCode = "BTC";
             var network = _NetworkProvider.GetNetwork(cryptoCode);
-            if (network == null || invoice == null || invoice.IsExpired() || !invoice.Support(new Services.Invoices.PaymentMethodId(cryptoCode, Payments.PaymentTypes.BTCLike)))
+            if (network == null || invoice == null || invoice.IsExpired() || !invoice.Support(new PaymentMethodId(cryptoCode, Payments.PaymentTypes.BTCLike)))
                 return NotFound();
 
             var wallet = _WalletProvider.GetWallet(network);

BTCPayServer/Controllers/InvoiceController.UI.cs

@@ -68,16 +68,16 @@ namespace BTCPayServer.Controllers
             {
                 var cryptoInfo = dto.CryptoInfo.First(o => o.GetpaymentMethodId() == data.GetId());
                 var accounting = data.Calculate();
-                var paymentNetwork = _NetworkProvider.GetNetwork(data.GetId().CryptoCode);
+                var paymentMethodId = data.GetId();
                 var cryptoPayment = new InvoiceDetailsModel.CryptoPayment();
-                cryptoPayment.CryptoCode = paymentNetwork.CryptoCode;
-                cryptoPayment.Due = accounting.Due.ToString() + $" {paymentNetwork.CryptoCode}";
-                cryptoPayment.Paid = accounting.CryptoPaid.ToString() + $" {paymentNetwork.CryptoCode}";
+                cryptoPayment.PaymentMethod = ToString(paymentMethodId);
+                cryptoPayment.Due = accounting.Due.ToString() + $" {paymentMethodId.CryptoCode}";
+                cryptoPayment.Paid = accounting.CryptoPaid.ToString() + $" {paymentMethodId.CryptoCode}";
 
                 var onchainMethod = data.GetPaymentMethodDetails() as Payments.Bitcoin.BitcoinLikeOnChainPaymentMethod;
                 if(onchainMethod != null)
                 { 
-                    cryptoPayment.Address = onchainMethod.DepositAddress.ToString();
+                    cryptoPayment.Address = onchainMethod.DepositAddress;
                 }
                 cryptoPayment.Rate = FormatCurrency(data);
                 cryptoPayment.PaymentUrl = cryptoInfo.PaymentUrls.BIP21;
@@ -86,19 +86,19 @@ namespace BTCPayServer.Controllers
 
             var payments = invoice
                 .GetPayments()
-                .Where(p => p.GetpaymentMethodId().PaymentType == PaymentTypes.BTCLike)
+                .Where(p => p.GetPaymentMethodId().PaymentType == PaymentTypes.BTCLike)
                 .Select(async payment =>
                 {
                     var paymentData = (Payments.Bitcoin.BitcoinLikePaymentData)payment.GetCryptoPaymentData();
                     var m = new InvoiceDetailsModel.Payment();
                     var paymentNetwork = _NetworkProvider.GetNetwork(payment.GetCryptoCode());
-                    m.CryptoCode = payment.GetCryptoCode();
+                    m.PaymentMethod = ToString(payment.GetPaymentMethodId());
                     m.DepositAddress = paymentData.Output.ScriptPubKey.GetDestinationAddress(paymentNetwork.NBitcoinNetwork);
 
                     int confirmationCount = 0;
                     if(paymentData.Legacy) // The confirmation count in the paymentData is not up to date
                     {
-                        confirmationCount = (await _ExplorerClients.GetExplorerClient(payment.GetCryptoCode())?.GetTransactionAsync(paymentData.Outpoint.Hash))?.Confirmations ?? 0;
+                        confirmationCount = (await ((ExplorerClientProvider)_ServiceProvider.GetService(typeof(ExplorerClientProvider))).GetExplorerClient(payment.GetCryptoCode())?.GetTransactionAsync(paymentData.Outpoint.Hash))?.Confirmations ?? 0;
                     }
                     else
                     {
@@ -121,12 +121,32 @@ namespace BTCPayServer.Controllers
                 })
                 .ToArray();
             await Task.WhenAll(payments);
-            model.Addresses = invoice.HistoricalAddresses;
+            model.Addresses = invoice.HistoricalAddresses.Select(h=> new InvoiceDetailsModel.AddressModel
+            {
+                Destination = h.GetAddress(),
+                PaymentMethod = ToString(h.GetPaymentMethodId()),
+                Current = !h.UnAssigned.HasValue
+            }).ToArray();
             model.Payments = payments.Select(p => p.GetAwaiter().GetResult()).ToList();
             model.StatusMessage = StatusMessage;
             return View(model);
         }
 
+        private string ToString(PaymentMethodId paymentMethodId)
+        {
+            var type = paymentMethodId.PaymentType.ToString();
+            switch (paymentMethodId.PaymentType)
+            {
+                case PaymentTypes.BTCLike:
+                    type = "On-Chain";
+                    break;
+                case PaymentTypes.LightningLike:
+                    type = "Off-Chain";
+                    break;
+            }
+            return $"{paymentMethodId.CryptoCode} ({type})";
+        }
+
         [HttpGet]
         [Route("i/{invoiceId}")]
         [Route("i/{invoiceId}/{paymentMethodId}")]
@@ -198,24 +218,29 @@ namespace BTCPayServer.Controllers
                 Rate = FormatCurrency(paymentMethod),
                 MerchantRefLink = invoice.RedirectURL ?? "/",
                 StoreName = store.StoreName,
-                InvoiceBitcoinUrl = cryptoInfo.PaymentUrls.BIP21,
-                TxCount = accounting.TxCount,
+                InvoiceBitcoinUrl = paymentMethodId.PaymentType == PaymentTypes.BTCLike ? cryptoInfo.PaymentUrls.BIP21 :
+                                    paymentMethodId.PaymentType == PaymentTypes.LightningLike ? cryptoInfo.PaymentUrls.BOLT11 :
+                                    throw new NotSupportedException(),
+                InvoiceBitcoinUrlQR = paymentMethodId.PaymentType == PaymentTypes.BTCLike ? cryptoInfo.PaymentUrls.BIP21 :
+                                    paymentMethodId.PaymentType == PaymentTypes.LightningLike ? cryptoInfo.PaymentUrls.BOLT11.ToUpperInvariant() :
+                                    throw new NotSupportedException(),
+                TxCount = accounting.TxRequired,
                 BtcPaid = accounting.Paid.ToString(),
                 Status = invoice.Status,
-                CryptoImage = "/" + Url.Content(network.CryptoImagePath),
-                NetworkFeeDescription = $"{accounting.TxCount} transaction{(accounting.TxCount > 1 ? "s" : "")} x {paymentMethodDetails.GetTxFee()} {network.CryptoCode}",
+                CryptoImage = "/" + GetImage(paymentMethodId,  network),
+                NetworkFeeDescription = $"{accounting.TxRequired} transaction{(accounting.TxRequired > 1 ? "s" : "")} x {paymentMethodDetails.GetTxFee()} {network.CryptoCode}",
                 AvailableCryptos = invoice.GetPaymentMethods(_NetworkProvider)
                                           .Where(i => i.Network != null)
                                           .Select(kv=> new PaymentModel.AvailableCrypto()
                                             {
                                                 PaymentMethodId = kv.GetId().ToString(),
-                                                CryptoImage = "/" + kv.Network.CryptoImagePath,
+                                                CryptoImage = "/" + GetImage(kv.GetId(), kv.Network),
                                                 Link = Url.Action(nameof(Checkout), new { invoiceId = invoiceId, paymentMethodId = kv.GetId().ToString() })
                                             }).Where(c => c.CryptoImage != "/")
                 .ToList()
             };
 
-            var isMultiCurrency = invoice.GetPayments().Select(p=>p.GetCryptoCode()).Concat(new[] { network.CryptoCode }).Distinct().Count() > 1;
+            var isMultiCurrency = invoice.GetPayments().Select(p=>p.GetPaymentMethodId()).Concat(new[] { paymentMethod.GetId() }).Distinct().Count() > 1;
             if (isMultiCurrency)
                 model.NetworkFeeDescription = $"{accounting.NetworkFee} {network.CryptoCode}";
 
@@ -224,6 +249,11 @@ namespace BTCPayServer.Controllers
             return model;
         }
 
+        private string GetImage(PaymentMethodId paymentMethodId, BTCPayNetwork network)
+        {
+            return (paymentMethodId.PaymentType == PaymentTypes.BTCLike ? Url.Content(network.CryptoImagePath) : Url.Content(network.LightningImagePath));
+        }
+
         private string FormatCurrency(PaymentMethod paymentMethod)
         {
             string currency = paymentMethod.ParentEntity.ProductInformation.Currency;
@@ -335,8 +365,10 @@ namespace BTCPayServer.Controllers
                 model.Invoices.Add(new InvoiceModel()
                 {
                     Status = invoice.Status,
-                    Date = invoice.InvoiceTime,
+                    Date = Prettify(invoice.InvoiceTime),
                     InvoiceId = invoice.Id,
+                    OrderId = invoice.OrderId ?? string.Empty,
+                    RedirectUrl = invoice.RedirectURL ?? string.Empty,
                     AmountCurrency = $"{invoice.ProductInformation.Price.ToString(CultureInfo.InvariantCulture)} {invoice.ProductInformation.Currency}"
                 });
             }
@@ -346,6 +378,30 @@ namespace BTCPayServer.Controllers
             return View(model);
         }
 
+        private string Prettify(DateTimeOffset invoiceTime)
+        {
+            var ago = DateTime.UtcNow - invoiceTime;
+
+            if(ago.TotalMinutes < 1)
+            {
+                return $"{(int)ago.TotalSeconds} second{Plural((int)ago.TotalSeconds)} ago";
+            }
+            if (ago.TotalHours < 1)
+            {
+                return $"{(int)ago.TotalMinutes} minute{Plural((int)ago.TotalMinutes)} ago";
+            }
+            if (ago.Days < 1)
+            {
+                return $"{(int)ago.TotalHours} hour{Plural((int)ago.TotalHours)} ago";
+            }
+            return $"{(int)ago.TotalDays} day{Plural((int)ago.TotalDays)} ago";
+        }
+
+        private string Plural(int totalDays)
+        {
+            return totalDays > 1 ? "s" : string.Empty;
+        }
+
         [HttpGet]
         [Route("invoices/create")]
         [Authorize(AuthenticationSchemes = "Identity.Application")]
@@ -373,7 +429,7 @@ namespace BTCPayServer.Controllers
                 return View(model);
             }
             var store = await _StoreRepository.FindStore(model.StoreId, GetUserId());
-            if (store.GetDerivationStrategies(_NetworkProvider).Count() == 0)
+            if (store.GetSupportedPaymentMethods(_NetworkProvider).Count() == 0)
             {
                 StatusMessage = "Error: You need to configure the derivation scheme in order to create an invoice";
                 return RedirectToAction(nameof(StoresController.UpdateStore), "Stores", new

BTCPayServer/Controllers/InvoiceController.cs

@@ -46,49 +46,66 @@ namespace BTCPayServer.Controllers
     public partial class InvoiceController : Controller
     {
         InvoiceRepository _InvoiceRepository;
-        BTCPayWalletProvider _WalletProvider;
         IRateProviderFactory _RateProviders;
         StoreRepository _StoreRepository;
         UserManager<ApplicationUser> _UserManager;
-        IFeeProviderFactory _FeeProviderFactory;
         private CurrencyNameTable _CurrencyNameTable;
         EventAggregator _EventAggregator;
         BTCPayNetworkProvider _NetworkProvider;
-        ExplorerClientProvider _ExplorerClients;
-        public InvoiceController(InvoiceRepository invoiceRepository,
+        private readonly BTCPayWalletProvider _WalletProvider;
+        IServiceProvider _ServiceProvider;
+        public InvoiceController(
+            IServiceProvider serviceProvider,
+            InvoiceRepository invoiceRepository,
             CurrencyNameTable currencyNameTable,
             UserManager<ApplicationUser> userManager,
-            BTCPayWalletProvider walletProvider,
             IRateProviderFactory rateProviders,
             StoreRepository storeRepository,
             EventAggregator eventAggregator,
-            BTCPayNetworkProvider networkProvider,
-            ExplorerClientProvider explorerClientProviders,
-            IFeeProviderFactory feeProviderFactory)
+            BTCPayWalletProvider walletProvider,
+            BTCPayNetworkProvider networkProvider)
         {
-            _ExplorerClients = explorerClientProviders;
+            _ServiceProvider = serviceProvider;
             _CurrencyNameTable = currencyNameTable ?? throw new ArgumentNullException(nameof(currencyNameTable));
             _StoreRepository = storeRepository ?? throw new ArgumentNullException(nameof(storeRepository));
             _InvoiceRepository = invoiceRepository ?? throw new ArgumentNullException(nameof(invoiceRepository));
-            _WalletProvider = walletProvider ?? throw new ArgumentNullException(nameof(walletProvider));
             _RateProviders = rateProviders ?? throw new ArgumentNullException(nameof(rateProviders));
             _UserManager = userManager;
-            _FeeProviderFactory = feeProviderFactory ?? throw new ArgumentNullException(nameof(feeProviderFactory));
             _EventAggregator = eventAggregator;
             _NetworkProvider = networkProvider;
+            _WalletProvider = walletProvider;
         }
 
 
         internal async Task<DataWrapper<InvoiceResponse>> CreateInvoiceCore(Invoice invoice, StoreData store, string serverUrl)
         {
-            var derivationStrategies = store.GetDerivationStrategies(_NetworkProvider).Where(c => _ExplorerClients.IsAvailable(c.Network.CryptoCode)).ToList();
-            if (derivationStrategies.Count == 0)
+            var supportedPaymentMethods = store.GetSupportedPaymentMethods(_NetworkProvider)
+                                               .Select(c =>
+                                                (Handler: (IPaymentMethodHandler)_ServiceProvider.GetService(typeof(IPaymentMethodHandler<>).MakeGenericType(c.GetType())),
+                                                SupportedPaymentMethod: c,
+                                                Network: _NetworkProvider.GetNetwork(c.PaymentId.CryptoCode),
+                                                IsAvailable: Task.FromResult(false)))
+                                                .Where(c => c.Network != null)
+                                                .Select(c => 
+                                                {
+                                                    c.IsAvailable = c.Handler.IsAvailable(c.SupportedPaymentMethod, c.Network);
+                                                    return c;
+                                                })
+                                                .ToList();
+            foreach(var supportedPaymentMethod in supportedPaymentMethods.ToList())
+            {
+                if(!await supportedPaymentMethod.IsAvailable)
+                {
+                    supportedPaymentMethods.Remove(supportedPaymentMethod);
+                }
+            }
+            if (supportedPaymentMethods.Count == 0)
                 throw new BitpayHttpException(400, "No derivation strategy are available now for this store");
             var entity = new InvoiceEntity
             {
                 InvoiceTime = DateTimeOffset.UtcNow
             };
-            entity.SetDerivationStrategies(derivationStrategies);
+            entity.SetSupportedPaymentMethods(supportedPaymentMethods.Select(s => s.SupportedPaymentMethod));
 
             var storeBlob = store.GetStoreBlob();
             Uri notificationUri = Uri.IsWellFormedUriString(invoice.NotificationURL, UriKind.Absolute) ? new Uri(invoice.NotificationURL, UriKind.Absolute) : null;
@@ -116,56 +133,40 @@ namespace BTCPayServer.Controllers
             entity.Status = "new";
             entity.SpeedPolicy = ParseSpeedPolicy(invoice.TransactionSpeed, store.SpeedPolicy);
 
-            var queries = derivationStrategies
-                    .Select(derivationStrategy => (Wallet: _WalletProvider.GetWallet(derivationStrategy.Network),
-                                                    DerivationStrategy: derivationStrategy.DerivationStrategyBase,
-                                                    Network: derivationStrategy.Network,
-                                                    RateProvider: _RateProviders.GetRateProvider(derivationStrategy.Network, false),
-                                                    FeeRateProvider: _FeeProviderFactory.CreateFeeProvider(derivationStrategy.Network)))
-                    .Where(_ => _.Wallet != null &&
-                                _.FeeRateProvider != null &&
-                                _.RateProvider != null)
-                    .Select(_ =>
-                    {
-                        return new
+            var methods = supportedPaymentMethods
+                        .Select(async o =>
                         {
-                            network = _.Network,
-                            getFeeRate = _.FeeRateProvider.GetFeeRateAsync(),
-                            getRate = storeBlob.ApplyRateRules(_.Network, _.RateProvider).GetRateAsync(invoice.Currency),
-                            getAddress = _.Wallet.ReserveAddressAsync(_.DerivationStrategy)
-                        };
-                    });
-
-            bool legacyBTCisSet = false;
-            var paymentMethods = new PaymentMethodDictionary();
-            foreach (var q in queries)
-            {
-                PaymentMethod paymentMethod = new PaymentMethod();
-                paymentMethod.SetId(new PaymentMethodId(q.network.CryptoCode, PaymentTypes.BTCLike));
-                Payments.Bitcoin.BitcoinLikeOnChainPaymentMethod onchainMethod = new Payments.Bitcoin.BitcoinLikeOnChainPaymentMethod();
-                onchainMethod.FeeRate = (await q.getFeeRate);
-                onchainMethod.TxFee = GetTxFee(storeBlob, onchainMethod.FeeRate); // assume price for 100 bytes
-                paymentMethod.Rate = await q.getRate;
-                onchainMethod.DepositAddress = (await q.getAddress);
-                paymentMethod.SetPaymentMethodDetails(onchainMethod);
+                            var rate = await storeBlob.ApplyRateRules(o.Network, _RateProviders.GetRateProvider(o.Network, false)).GetRateAsync(invoice.Currency);
+                            PaymentMethod paymentMethod = new PaymentMethod();
+                            paymentMethod.ParentEntity = entity;
+                            paymentMethod.SetId(o.SupportedPaymentMethod.PaymentId);
+                            paymentMethod.Rate = rate;
+                            var paymentDetails = await o.Handler.CreatePaymentMethodDetails(o.SupportedPaymentMethod, paymentMethod, o.Network);
+                            if (storeBlob.NetworkFeeDisabled)
+                                paymentDetails.SetNoTxFee();
+                            paymentMethod.SetPaymentMethodDetails(paymentDetails);
 #pragma warning disable CS0618
-                if (q.network.IsBTC)
-                {
-                    legacyBTCisSet = true;
-                    entity.TxFee = paymentMethod.TxFee;
-                    entity.Rate = paymentMethod.Rate;
-                    entity.DepositAddress = paymentMethod.DepositAddress;
-                }
+                            if (paymentMethod.GetId().IsBTCOnChain)
+                            {
+                                entity.TxFee = paymentMethod.TxFee;
+                                entity.Rate = paymentMethod.Rate;
+                                entity.DepositAddress = paymentMethod.DepositAddress;
+                            }
 #pragma warning restore CS0618
-                paymentMethods.Add(paymentMethod);
-            }
-
-            if (!legacyBTCisSet)
+                            return paymentMethod;
+                        });
+            var paymentMethods = new PaymentMethodDictionary();
+            foreach (var method in methods)
             {
-                // Legacy Bitpay clients expect information for BTC information, even if the store do not support it
+                paymentMethods.Add(await method);
+            }
 #pragma warning disable CS0618
+            // Legacy Bitpay clients expect information for BTC information, even if the store do not support it
+            var legacyBTCisSet = paymentMethods.Any(p => p.GetId().IsBTCOnChain);
+            if (!legacyBTCisSet && _NetworkProvider.BTC != null)
+            {
                 var btc = _NetworkProvider.BTC;
-                var feeProvider = _FeeProviderFactory.CreateFeeProvider(btc);
+                var feeProvider = ((IFeeProviderFactory)_ServiceProvider.GetService(typeof(IFeeProviderFactory))).CreateFeeProvider(btc);
                 var rateProvider = storeBlob.ApplyRateRules(btc, _RateProviders.GetRateProvider(btc, false));
                 if (feeProvider != null && rateProvider != null)
                 {
@@ -185,10 +186,12 @@ namespace BTCPayServer.Controllers
             return new DataWrapper<InvoiceResponse>(resp) { Facade = "pos/invoice" };
         }
 
+#pragma warning disable CS0618
         private static Money GetTxFee(StoreBlob storeBlob, FeeRate feeRate)
         {
             return storeBlob.NetworkFeeDisabled ? Money.Zero : feeRate.GetFee(100);
         }
+#pragma warning restore CS0618
 
         private SpeedPolicy ParseSpeedPolicy(string transactionSpeed, SpeedPolicy defaultPolicy)
         {

BTCPayServer/Controllers/ManageController.cs

@@ -368,7 +368,7 @@ namespace BTCPayServer.Controllers
 
             if (!user.TwoFactorEnabled)
             {
-                throw new ApplicationException($"Unexpected error occured disabling 2FA for user with ID '{user.Id}'.");
+                throw new ApplicationException($"Unexpected error occurred disabling 2FA for user with ID '{user.Id}'.");
             }
 
             return View(nameof(Disable2fa));
@@ -387,7 +387,7 @@ namespace BTCPayServer.Controllers
             var disable2faResult = await _userManager.SetTwoFactorEnabledAsync(user, false);
             if (!disable2faResult.Succeeded)
             {
-                throw new ApplicationException($"Unexpected error occured disabling 2FA for user with ID '{user.Id}'.");
+                throw new ApplicationException($"Unexpected error occurred disabling 2FA for user with ID '{user.Id}'.");
             }
 
             _logger.LogInformation("User with ID {UserId} has disabled 2fa.", user.Id);

BTCPayServer/Controllers/StoresController.BTCLike.cs

@@ -0,0 +1,304 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Net.WebSockets;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using BTCPayServer.Data;
+using BTCPayServer.Models.StoreViewModels;
+using BTCPayServer.Payments;
+using BTCPayServer.Services;
+using Microsoft.AspNetCore.Mvc;
+using NBitcoin;
+using NBXplorer.DerivationStrategy;
+using Newtonsoft.Json;
+
+namespace BTCPayServer.Controllers
+{
+    public partial class StoresController
+    {
+        [HttpGet]
+        [Route("{storeId}/derivations")]
+        public async Task<IActionResult> AddDerivationScheme(string storeId, string selectedScheme = null)
+        {
+            selectedScheme = selectedScheme ?? "BTC";
+            var store = await _Repo.FindStore(storeId, GetUserId());
+            if (store == null)
+                return NotFound();
+            DerivationSchemeViewModel vm = new DerivationSchemeViewModel();
+            vm.ServerUrl = GetStoreUrl(storeId);
+            vm.SetCryptoCurrencies(_ExplorerProvider, selectedScheme);
+            return View(vm);
+        }
+
+        [HttpPost]
+        [Route("{storeId}/derivations")]
+        public async Task<IActionResult> AddDerivationScheme(string storeId, DerivationSchemeViewModel vm)
+        {
+            vm.ServerUrl = GetStoreUrl(storeId);
+            var store = await _Repo.FindStore(storeId, GetUserId());
+            if (store == null)
+                return NotFound();
+
+            var network = vm.CryptoCurrency == null ? null : _ExplorerProvider.GetNetwork(vm.CryptoCurrency);
+            vm.SetCryptoCurrencies(_ExplorerProvider, vm.CryptoCurrency);
+            if (network == null)
+            {
+                ModelState.AddModelError(nameof(vm.CryptoCurrency), "Invalid network");
+                return View(vm);
+            }
+            var wallet = _WalletProvider.GetWallet(network);
+            if (wallet == null)
+            {
+                ModelState.AddModelError(nameof(vm.CryptoCurrency), "Invalid network");
+                return View(vm);
+            }
+
+            PaymentMethodId paymentMethodId = new PaymentMethodId(network.CryptoCode, PaymentTypes.BTCLike);
+            DerivationStrategy strategy = null;
+            try
+            {
+                if (!string.IsNullOrEmpty(vm.DerivationScheme))
+                {
+                    strategy = ParseDerivationStrategy(vm.DerivationScheme, vm.DerivationSchemeFormat, network);
+                    vm.DerivationScheme = strategy.ToString();
+                }
+            }
+            catch
+            {
+                ModelState.AddModelError(nameof(vm.DerivationScheme), "Invalid Derivation Scheme");
+                vm.Confirmation = false;
+                return View(vm);
+            }
+
+
+            if (vm.Confirmation || strategy == null)
+            {
+                try
+                {
+                    if (strategy != null)
+                        await wallet.TrackAsync(strategy.DerivationStrategyBase);
+                    store.SetSupportedPaymentMethod(paymentMethodId, strategy);
+                }
+                catch
+                {
+                    ModelState.AddModelError(nameof(vm.DerivationScheme), "Invalid Derivation Scheme");
+                    return View(vm);
+                }
+
+                await _Repo.UpdateStore(store);
+                StatusMessage = $"Derivation scheme for {network.CryptoCode} has been modified.";
+                return RedirectToAction(nameof(UpdateStore), new { storeId = storeId });
+            }
+            else
+            {
+                if (!string.IsNullOrEmpty(vm.DerivationScheme))
+                {
+                    var line = strategy.DerivationStrategyBase.GetLineFor(DerivationFeature.Deposit);
+
+                    for (int i = 0; i < 10; i++)
+                    {
+                        var address = line.Derive((uint)i);
+                        vm.AddressSamples.Add((DerivationStrategyBase.GetKeyPath(DerivationFeature.Deposit).Derive((uint)i).ToString(), address.ScriptPubKey.GetDestinationAddress(network.NBitcoinNetwork).ToString()));
+                    }
+                }
+                vm.Confirmation = true;
+                return View(vm);
+            }
+        }
+
+
+
+        public class GetInfoResult
+        {
+            public int RecommendedSatoshiPerByte { get; set; }
+            public double Balance { get; set; }
+        }
+
+        public class SendToAddressResult
+        {
+            public string TransactionId { get; set; }
+        }
+
+        [HttpGet]
+        [Route("{storeId}/ws/ledger")]
+        public async Task<IActionResult> LedgerConnection(
+            string storeId,
+            string command,
+            // getinfo
+            string cryptoCode = null,
+            // sendtoaddress
+            string destination = null, string amount = null, string feeRate = null, string substractFees = null
+            )
+        {
+            if (!HttpContext.WebSockets.IsWebSocketRequest)
+                return NotFound();
+            var store = await _Repo.FindStore(storeId, GetUserId());
+            if (store == null)
+                return NotFound();
+
+            var webSocket = await HttpContext.WebSockets.AcceptWebSocketAsync();
+
+            var hw = new HardwareWalletService(webSocket);
+            object result = null;
+            try
+            {
+                BTCPayNetwork network = null;
+                if (cryptoCode != null)
+                {
+                    network = _NetworkProvider.GetNetwork(cryptoCode);
+                    if (network == null)
+                        throw new FormatException("Invalid value for crypto code");
+                }
+
+                BitcoinAddress destinationAddress = null;
+                if (destination != null)
+                {
+                    try
+                    {
+                        destinationAddress = BitcoinAddress.Create(destination);
+                    }
+                    catch { }
+                    if (destinationAddress == null)
+                        throw new FormatException("Invalid value for destination");
+                }
+
+                FeeRate feeRateValue = null;
+                if (feeRate != null)
+                {
+                    try
+                    {
+                        feeRateValue = new FeeRate(Money.Satoshis(int.Parse(feeRate, CultureInfo.InvariantCulture)), 1);
+                    }
+                    catch { }
+                    if (feeRateValue == null || feeRateValue.FeePerK <= Money.Zero)
+                        throw new FormatException("Invalid value for fee rate");
+                }
+
+                Money amountBTC = null;
+                if (amount != null)
+                {
+                    try
+                    {
+                        amountBTC = Money.Parse(amount);
+                    }
+                    catch { }
+                    if (amountBTC == null || amountBTC <= Money.Zero)
+                        throw new FormatException("Invalid value for amount");
+                }
+
+                bool subsctractFeesValue = false;
+                if (substractFees != null)
+                {
+                    try
+                    {
+                        subsctractFeesValue = bool.Parse(substractFees);
+                    }
+                    catch { throw new FormatException("Invalid value for subtract fees"); }
+                }
+                if (command == "test")
+                {
+                    result = await hw.Test();
+                }
+                if (command == "getxpub")
+                {
+                    result = await hw.GetExtPubKey(network);
+                }
+                if (command == "getinfo")
+                {
+                    var strategy = GetDirectDerivationStrategy(store, network);
+                    var strategyBase = GetDerivationStrategy(store, network);
+                    if (strategy == null || !await hw.SupportDerivation(network, strategy))
+                    {
+                        throw new Exception($"This store is not configured to use this ledger");
+                    }
+
+                    var feeProvider = _FeeRateProvider.CreateFeeProvider(network);
+                    var recommendedFees = feeProvider.GetFeeRateAsync();
+                    var balance = _WalletProvider.GetWallet(network).GetBalance(strategyBase);
+                    result = new GetInfoResult() { Balance = (double)(await balance).ToDecimal(MoneyUnit.BTC), RecommendedSatoshiPerByte = (int)(await recommendedFees).GetFee(1).Satoshi };
+                }
+
+                if (command == "sendtoaddress")
+                {
+                    if(!_Dashboard.IsFullySynched(network.CryptoCode, out var summary))
+                        throw new Exception($"{network.CryptoCode}: not started or fully synched");
+                    var strategy = GetDirectDerivationStrategy(store, network);
+                    var strategyBase = GetDerivationStrategy(store, network);
+                    var wallet = _WalletProvider.GetWallet(network);
+                    var change = wallet.GetChangeAddressAsync(strategyBase);
+                    
+                    var unspentCoins = await wallet.GetUnspentCoins(strategyBase);
+                    var changeAddress = await change;
+                    var transaction = await hw.SendToAddress(strategy, unspentCoins, network,
+                                            new[] { (destinationAddress as IDestination, amountBTC, subsctractFeesValue) },
+                                            feeRateValue,
+                                            changeAddress.Item1,
+                                            changeAddress.Item2, summary.Status.BitcoinStatus.MinRelayTxFee);
+                    try
+                    {
+                        var broadcastResult = await wallet.BroadcastTransactionsAsync(new List<Transaction>() { transaction });
+                        if (!broadcastResult[0].Success)
+                        {
+                            throw new Exception($"RPC Error while broadcasting: {broadcastResult[0].RPCCode} {broadcastResult[0].RPCCodeMessage} {broadcastResult[0].RPCMessage}");
+                        }
+                    }
+                    catch (Exception ex)
+                    {
+                        throw new Exception("Error while broadcasting: " + ex.Message);
+                    }
+                    wallet.InvalidateCache(strategyBase);
+                    result = new SendToAddressResult() { TransactionId = transaction.GetHash().ToString() };
+                }
+            }
+            catch (OperationCanceledException)
+            { result = new LedgerTestResult() { Success = false, Error = "Timeout" }; }
+            catch (Exception ex)
+            { result = new LedgerTestResult() { Success = false, Error = ex.Message }; }
+
+            try
+            {
+                if (result != null)
+                {
+                    UTF8Encoding UTF8NOBOM = new UTF8Encoding(false);
+                    var bytes = UTF8NOBOM.GetBytes(JsonConvert.SerializeObject(result, _MvcJsonOptions.SerializerSettings));
+                    await webSocket.SendAsync(new ArraySegment<byte>(bytes), WebSocketMessageType.Text, true, new CancellationTokenSource(2000).Token);
+                }
+            }
+            catch { }
+            finally
+            {
+                await webSocket.CloseSocket();
+            }
+
+            return new EmptyResult();
+        }
+
+        private DirectDerivationStrategy GetDirectDerivationStrategy(StoreData store, BTCPayNetwork network)
+        {
+            var strategy = GetDerivationStrategy(store, network);
+            var directStrategy = strategy as DirectDerivationStrategy;
+            if (directStrategy == null)
+                directStrategy = (strategy as P2SHDerivationStrategy).Inner as DirectDerivationStrategy;
+            if (!directStrategy.Segwit)
+                return null;
+            return directStrategy;
+        }
+
+        private DerivationStrategyBase GetDerivationStrategy(StoreData store, BTCPayNetwork network)
+        {
+            var strategy = store
+                            .GetSupportedPaymentMethods(_NetworkProvider)
+                            .OfType<DerivationStrategy>()
+                            .FirstOrDefault(s => s.Network.NBitcoinNetwork == network.NBitcoinNetwork);
+            if (strategy == null)
+            {
+                throw new Exception($"Derivation strategy for {network.CryptoCode} is not set");
+            }
+
+            return strategy.DerivationStrategyBase;
+        }
+    }
+}

BTCPayServer/Controllers/StoresController.LightningLike.cs

@@ -0,0 +1,135 @@
+using System;
+using Microsoft.Extensions.DependencyInjection;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using BTCPayServer.Models.StoreViewModels;
+using BTCPayServer.Payments;
+using BTCPayServer.Payments.Lightning.CLightning;
+using Microsoft.AspNetCore.Mvc;
+using BTCPayServer.Payments.Lightning;
+
+namespace BTCPayServer.Controllers
+{
+    public partial class StoresController
+    {
+        [HttpGet]
+        [Route("{storeId}/lightning")]
+        public async Task<IActionResult> AddLightningNode(string storeId, string selectedCrypto = null)
+        {
+            selectedCrypto = selectedCrypto ?? "BTC";
+            var store = await _Repo.FindStore(storeId, GetUserId());
+            if (store == null)
+                return NotFound();
+            LightningNodeViewModel vm = new LightningNodeViewModel();
+            vm.SetCryptoCurrencies(_NetworkProvider, selectedCrypto);
+            vm.InternalLightningNode = GetInternalLightningNodeIfAuthorized();
+            return View(vm);
+        }
+
+        [HttpPost]
+        [Route("{storeId}/lightning")]
+        public async Task<IActionResult> AddLightningNode(string storeId, LightningNodeViewModel vm, string command)
+        {
+            var store = await _Repo.FindStore(storeId, GetUserId());
+            if (store == null)
+                return NotFound();
+            var network = vm.CryptoCurrency == null ? null : _ExplorerProvider.GetNetwork(vm.CryptoCurrency);
+            vm.SetCryptoCurrencies(_NetworkProvider, vm.CryptoCurrency);
+            vm.InternalLightningNode = GetInternalLightningNodeIfAuthorized();
+            if (network == null || network.CLightningNetworkName == null)
+            {
+                ModelState.AddModelError(nameof(vm.CryptoCurrency), "Invalid network");
+                return View(vm);
+            }
+
+            PaymentMethodId paymentMethodId = new PaymentMethodId(network.CryptoCode, PaymentTypes.LightningLike);
+            Payments.Lightning.LightningSupportedPaymentMethod paymentMethod = null;
+            if (!string.IsNullOrEmpty(vm.Url))
+            {
+                Uri uri;
+                if (!Uri.TryCreate(vm.Url, UriKind.Absolute, out uri))
+                {
+                    ModelState.AddModelError(nameof(vm.Url), "Invalid URL");
+                    return View(vm);
+                }
+
+                var domain = GetDomain(uri.AbsoluteUri);
+                if (uri.Scheme != "https" && domain != "127.0.0.1" && domain != "localhost")
+                {
+                    var internalNode = GetInternalLightningNodeIfAuthorized();
+                    if (internalNode == null || GetDomain(internalNode) != domain)
+                    {
+                        ModelState.AddModelError(nameof(vm.Url), "The url must be HTTPS");
+                        return View(vm);
+                    }
+                }
+
+                if (!CanUseInternalLightning() && GetDomain(_BtcpayServerOptions.InternalLightningNode.AbsoluteUri) == GetDomain(uri.AbsoluteUri))
+                {
+                    ModelState.AddModelError(nameof(vm.Url), "Unauthorized url");
+                    return View(vm);
+                }
+
+                if (string.IsNullOrEmpty(uri.UserInfo) || uri.UserInfo.Split(':').Length != 2)
+                {
+                    ModelState.AddModelError(nameof(vm.Url), "The url is missing user and password");
+                    return View(vm);
+                }
+
+                paymentMethod = new Payments.Lightning.LightningSupportedPaymentMethod()
+                {
+                    CryptoCode = paymentMethodId.CryptoCode
+                };
+                paymentMethod.SetLightningChargeUrl(uri);
+            }
+            if (command == "save")
+            {
+                store.SetSupportedPaymentMethod(paymentMethodId, paymentMethod);
+                await _Repo.UpdateStore(store);
+                StatusMessage = $"Lightning node modified ({network.CryptoCode})";
+                return RedirectToAction(nameof(UpdateStore), new { storeId = storeId });
+            }
+            else // if(command == "test")
+            {
+                if (paymentMethod == null)
+                {
+                    ModelState.AddModelError(nameof(vm.Url), "Missing url parameter");
+                    return View(vm);
+                }
+                var handler = (LightningLikePaymentHandler)_ServiceProvider.GetRequiredService<IPaymentMethodHandler<Payments.Lightning.LightningSupportedPaymentMethod>>();
+                try
+                {
+                    await handler.Test(paymentMethod, network);
+                }
+                catch (Exception ex)
+                {
+                    vm.StatusMessage = $"Error: {ex.Message}";
+                    return View(vm);
+                }
+                vm.StatusMessage = "Connection to the lightning node succeed";
+                return View(vm);
+            }
+        }
+
+        private string GetInternalLightningNodeIfAuthorized()
+        {
+            if (_BtcpayServerOptions.InternalLightningNode != null &&
+                        CanUseInternalLightning())
+            {
+                return _BtcpayServerOptions.InternalLightningNode.AbsoluteUri;
+            }
+            return null;
+        }
+
+        private bool CanUseInternalLightning()
+        {
+            return (_BTCPayEnv.IsDevelopping || User.IsInRole(Roles.ServerAdmin));
+        }
+
+        string GetDomain(string uri)
+        {
+            return new UriBuilder(uri).Host;
+        }
+    }
+}

BTCPayServer/Controllers/StoresController.cs

@@ -1,13 +1,12 @@
 using BTCPayServer.Authentication;
+using BTCPayServer.Configuration;
 using BTCPayServer.Data;
+using BTCPayServer.HostedServices;
 using BTCPayServer.Models;
 using BTCPayServer.Models.StoreViewModels;
 using BTCPayServer.Services;
-using BTCPayServer.Services.Fees;
 using BTCPayServer.Services.Stores;
 using BTCPayServer.Services.Wallets;
-using LedgerWallet;
-using Microsoft.AspNetCore.Authentication.Cookies;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Identity;
@@ -16,16 +15,11 @@ using Microsoft.AspNetCore.Mvc.Rendering;
 using Microsoft.Extensions.Options;
 using NBitcoin;
 using NBitcoin.DataEncoders;
-using NBitpayClient;
 using NBXplorer.DerivationStrategy;
-using Newtonsoft.Json;
 using System;
 using System.Collections.Generic;
-using System.Globalization;
 using System.Linq;
 using System.Net.Http;
-using System.Net.WebSockets;
-using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 
@@ -35,9 +29,13 @@ namespace BTCPayServer.Controllers
     [Authorize(AuthenticationSchemes = "Identity.Application")]
     [Authorize(Policy = "CanAccessStore")]
     [AutoValidateAntiforgeryToken]
-    public class StoresController : Controller
+    public partial class StoresController : Controller
     {
         public StoresController(
+            NBXplorerDashboard dashboard,
+            IServiceProvider serviceProvider,
+            BTCPayServerOptions btcpayServerOptions,
+            BTCPayServerEnvironment btcpayEnv,
             IOptions<MvcJsonOptions> mvcJsonOptions,
             StoreRepository repo,
             TokenRepository tokenRepo,
@@ -49,6 +47,7 @@ namespace BTCPayServer.Controllers
             IFeeProviderFactory feeRateProvider,
             IHostingEnvironment env)
         {
+            _Dashboard = dashboard;
             _Repo = repo;
             _TokenRepository = tokenRepo;
             _UserManager = userManager;
@@ -59,7 +58,14 @@ namespace BTCPayServer.Controllers
             _ExplorerProvider = explorerProvider;
             _MvcJsonOptions = mvcJsonOptions.Value;
             _FeeRateProvider = feeRateProvider;
+            _ServiceProvider = serviceProvider;
+            _BtcpayServerOptions = btcpayServerOptions;
+            _BTCPayEnv = btcpayEnv;
         }
+        NBXplorerDashboard _Dashboard;
+        BTCPayServerOptions _BtcpayServerOptions;
+        BTCPayServerEnvironment _BTCPayEnv;
+        IServiceProvider _ServiceProvider;
         BTCPayNetworkProvider _NetworkProvider;
         private ExplorerClientProvider _ExplorerProvider;
         private MvcJsonOptions _MvcJsonOptions;
@@ -121,190 +127,6 @@ namespace BTCPayServer.Controllers
             return HttpContext.Request.GetAbsoluteRoot() + "/stores/" + storeId + "/";
         }
 
-        public class GetInfoResult
-        {
-            public int RecommendedSatoshiPerByte { get; set; }
-            public double Balance { get; set; }
-        }
-
-        public class SendToAddressResult
-        {
-            public string TransactionId { get; set; }
-        }
-
-        [HttpGet]
-        [Route("{storeId}/ws/ledger")]
-        public async Task<IActionResult> LedgerConnection(
-            string storeId,
-            string command,
-            // getinfo
-            string cryptoCode = null,
-            // sendtoaddress
-            string destination = null, string amount = null, string feeRate = null, string substractFees = null
-            )
-        {
-            if (!HttpContext.WebSockets.IsWebSocketRequest)
-                return NotFound();
-            var store = await _Repo.FindStore(storeId, GetUserId());
-            if (store == null)
-                return NotFound();
-
-            var webSocket = await HttpContext.WebSockets.AcceptWebSocketAsync();
-
-            var hw = new HardwareWalletService(webSocket);
-            object result = null;
-            try
-            {
-                BTCPayNetwork network = null;
-                if (cryptoCode != null)
-                {
-                    network = _NetworkProvider.GetNetwork(cryptoCode);
-                    if (network == null)
-                        throw new FormatException("Invalid value for crypto code");
-                }
-
-                BitcoinAddress destinationAddress = null;
-                if (destination != null)
-                {
-                    try
-                    {
-                        destinationAddress = BitcoinAddress.Create(destination);
-                    }
-                    catch { }
-                    if (destinationAddress == null)
-                        throw new FormatException("Invalid value for destination");
-                }
-
-                FeeRate feeRateValue = null;
-                if (feeRate != null)
-                {
-                    try
-                    {
-                        feeRateValue = new FeeRate(Money.Satoshis(int.Parse(feeRate, CultureInfo.InvariantCulture)), 1);
-                    }
-                    catch { }
-                    if (feeRateValue == null || feeRateValue.FeePerK <= Money.Zero)
-                        throw new FormatException("Invalid value for fee rate");
-                }
-
-                Money amountBTC = null;
-                if (amount != null)
-                {
-                    try
-                    {
-                        amountBTC = Money.Parse(amount);
-                    }
-                    catch { }
-                    if (amountBTC == null || amountBTC <= Money.Zero)
-                        throw new FormatException("Invalid value for amount");
-                }
-
-                bool subsctractFeesValue = false;
-                if (substractFees != null)
-                {
-                    try
-                    {
-                        subsctractFeesValue = bool.Parse(substractFees);
-                    }
-                    catch { throw new FormatException("Invalid value for substract fees"); }
-                }
-                if (command == "test")
-                {
-                    result = await hw.Test();
-                }
-                if (command == "getxpub")
-                {
-                    result = await hw.GetExtPubKey(network);
-                }
-                if (command == "getinfo")
-                {
-                    var strategy = GetDirectDerivationStrategy(store, network);
-                    var strategyBase = GetDerivationStrategy(store, network);
-                    if (strategy == null || !await hw.SupportDerivation(network, strategy))
-                    {
-                        throw new Exception($"This store is not configured to use this ledger");
-                    }
-
-                    var feeProvider = _FeeRateProvider.CreateFeeProvider(network);
-                    var recommendedFees = feeProvider.GetFeeRateAsync();
-                    var balance = _WalletProvider.GetWallet(network).GetBalance(strategyBase);
-                    result = new GetInfoResult() { Balance = (double)(await balance).ToDecimal(MoneyUnit.BTC), RecommendedSatoshiPerByte = (int)(await recommendedFees).GetFee(1).Satoshi };
-                }
-
-                if (command == "sendtoaddress")
-                {
-                    var strategy = GetDirectDerivationStrategy(store, network);
-                    var strategyBase = GetDerivationStrategy(store, network);
-                    var wallet = _WalletProvider.GetWallet(network);
-                    var change = wallet.GetChangeAddressAsync(strategyBase);
-                    var unspentCoins = await wallet.GetUnspentCoins(strategyBase);
-                    var changeAddress = await change;
-                    var transaction = await hw.SendToAddress(strategy, unspentCoins, network,
-                                            new[] { (destinationAddress as IDestination, amountBTC, subsctractFeesValue) },
-                                            feeRateValue,
-                                            changeAddress.Item1,
-                                            changeAddress.Item2);
-                    try
-                    {
-                        var broadcastResult = await wallet.BroadcastTransactionsAsync(new List<Transaction>() { transaction });
-                        if (!broadcastResult[0].Success)
-                        {
-                            throw new Exception($"RPC Error while broadcasting: {broadcastResult[0].RPCCode} {broadcastResult[0].RPCCodeMessage} {broadcastResult[0].RPCMessage}");
-                        }
-                    }
-                    catch (Exception ex)
-                    {
-                        throw new Exception("Error while broadcasting: " + ex.Message);
-                    }
-                    wallet.InvalidateCache(strategyBase);
-                    result = new SendToAddressResult() { TransactionId = transaction.GetHash().ToString() };
-                }
-            }
-            catch (OperationCanceledException)
-            { result = new LedgerTestResult() { Success = false, Error = "Timeout" }; }
-            catch (Exception ex)
-            { result = new LedgerTestResult() { Success = false, Error = ex.Message }; }
-
-            try
-            {
-                if (result != null)
-                {
-                    UTF8Encoding UTF8NOBOM = new UTF8Encoding(false);
-                    var bytes = UTF8NOBOM.GetBytes(JsonConvert.SerializeObject(result, _MvcJsonOptions.SerializerSettings));
-                    await webSocket.SendAsync(new ArraySegment<byte>(bytes), WebSocketMessageType.Text, true, new CancellationTokenSource(2000).Token);
-                }
-            }
-            catch { }
-            finally
-            {
-                await webSocket.CloseSocket();
-            }
-
-            return new EmptyResult();
-        }
-
-        private DirectDerivationStrategy GetDirectDerivationStrategy(StoreData store, BTCPayNetwork network)
-        {
-            var strategy = GetDerivationStrategy(store, network);
-            var directStrategy = strategy as DirectDerivationStrategy;
-            if (directStrategy == null)
-                directStrategy = (strategy as P2SHDerivationStrategy).Inner as DirectDerivationStrategy;
-            if (!directStrategy.Segwit)
-                return null;
-            return directStrategy;
-        }
-
-        private DerivationStrategyBase GetDerivationStrategy(StoreData store, BTCPayNetwork network)
-        {
-            var strategy = store.GetDerivationStrategies(_NetworkProvider).FirstOrDefault(s => s.Network.NBitcoinNetwork == network.NBitcoinNetwork);
-            if (strategy == null)
-            {
-                throw new Exception($"Derivation strategy for {network.CryptoCode} is not set");
-            }
-
-            return strategy.DerivationStrategyBase;
-        }
-
         [HttpGet]
         public async Task<IActionResult> ListStores()
         {
@@ -312,7 +134,8 @@ namespace BTCPayServer.Controllers
             result.StatusMessage = StatusMessage;
             var stores = await _Repo.GetStoresByUserId(GetUserId());
             var balances = stores
-                                .Select(s => s.GetDerivationStrategies(_NetworkProvider)
+                                .Select(s => s.GetSupportedPaymentMethods(_NetworkProvider)
+                                              .OfType<DerivationStrategy>()
                                               .Select(d => ((Wallet: _WalletProvider.GetWallet(d.Network),
                                                             DerivationStrategy: d.DerivationStrategyBase)))
                                               .Where(_ => _.Wallet != null)
@@ -393,7 +216,7 @@ namespace BTCPayServer.Controllers
             vm.StoreWebsite = store.StoreWebsite;
             vm.NetworkFee = !storeBlob.NetworkFeeDisabled;
             vm.SpeedPolicy = store.SpeedPolicy;
-            AddDerivationSchemes(store, vm);
+            AddPaymentMethods(store, vm);
             vm.StatusMessage = StatusMessage;
             vm.MonitoringExpiration = storeBlob.MonitoringExpiration;
             vm.InvoiceExpiration = storeBlob.InvoiceExpiration;
@@ -402,113 +225,28 @@ namespace BTCPayServer.Controllers
             return View(vm);
         }
 
-        private void AddDerivationSchemes(StoreData store, StoreViewModel vm)
+        private void AddPaymentMethods(StoreData store, StoreViewModel vm)
         {
-            var strategies = store
-                            .GetDerivationStrategies(_NetworkProvider)
-                            .ToDictionary(s => s.Network.CryptoCode);
-            foreach (var explorerProvider in _ExplorerProvider.GetAll())
+            foreach(var strategy in  store
+                            .GetSupportedPaymentMethods(_NetworkProvider)
+                            .OfType<DerivationStrategy>())
             {
-                if (strategies.TryGetValue(explorerProvider.Item1.CryptoCode, out DerivationStrategy strat))
+                vm.DerivationSchemes.Add(new StoreViewModel.DerivationScheme()
                 {
-                    vm.DerivationSchemes.Add(new StoreViewModel.DerivationScheme()
-                    {
-                        Crypto = explorerProvider.Item1.CryptoCode,
-                        Value = strat.DerivationStrategyBase.ToString()
-                    });
-                }
-            }
-        }
-
-        [HttpGet]
-        [Route("{storeId}/derivations")]
-        public async Task<IActionResult> AddDerivationScheme(string storeId, string selectedScheme = null)
-        {
-            selectedScheme = selectedScheme ?? "BTC";
-            var store = await _Repo.FindStore(storeId, GetUserId());
-            if (store == null)
-                return NotFound();
-            DerivationSchemeViewModel vm = new DerivationSchemeViewModel();
-            vm.ServerUrl = GetStoreUrl(storeId);
-            vm.SetCryptoCurrencies(_ExplorerProvider, selectedScheme);
-            return View(vm);
-        }
-
-        [HttpPost]
-        [Route("{storeId}/derivations")]
-        public async Task<IActionResult> AddDerivationScheme(string storeId, DerivationSchemeViewModel vm, string selectedScheme = null)
-        {
-            selectedScheme = selectedScheme ?? "BTC";
-            vm.ServerUrl = GetStoreUrl(storeId);
-            var store = await _Repo.FindStore(storeId, GetUserId());
-            if (store == null)
-                return NotFound();
-
-            var network = vm.CryptoCurrency == null ? null : _ExplorerProvider.GetNetwork(vm.CryptoCurrency);
-            vm.SetCryptoCurrencies(_ExplorerProvider, selectedScheme);
-            if (network == null)
-            {
-                ModelState.AddModelError(nameof(vm.CryptoCurrency), "Invalid network");
-                return View(vm);
-            }
-            var wallet = _WalletProvider.GetWallet(network);
-            if (wallet == null)
-            {
-                ModelState.AddModelError(nameof(vm.CryptoCurrency), "Invalid network");
-                return View(vm);
+                    Crypto = strategy.PaymentId.CryptoCode,
+                    Value = strategy.DerivationStrategyBase.ToString()
+                });
             }
 
-
-            DerivationStrategyBase strategy = null;
-            try
+            foreach(var lightning in store
+                                        .GetSupportedPaymentMethods(_NetworkProvider)
+                                        .OfType<Payments.Lightning.LightningSupportedPaymentMethod>())
             {
-                if (!string.IsNullOrEmpty(vm.DerivationScheme))
+                vm.LightningNodes.Add(new StoreViewModel.LightningNode()
                 {
-                    strategy = ParseDerivationStrategy(vm.DerivationScheme, vm.DerivationSchemeFormat, network);
-                    vm.DerivationScheme = strategy.ToString();
-                }
-                store.SetDerivationStrategy(network, vm.DerivationScheme);
-            }
-            catch
-            {
-                ModelState.AddModelError(nameof(vm.DerivationScheme), "Invalid Derivation Scheme");
-                vm.Confirmation = false;
-                return View(vm);
-            }
-
-
-            if (strategy == null || vm.Confirmation)
-            {
-                try
-                {
-                    if (strategy != null)
-                        await wallet.TrackAsync(strategy);
-                    store.SetDerivationStrategy(network, vm.DerivationScheme);
-                }
-                catch
-                {
-                    ModelState.AddModelError(nameof(vm.DerivationScheme), "Invalid Derivation Scheme");
-                    return View(vm);
-                }
-
-                await _Repo.UpdateStore(store);
-                StatusMessage = $"Derivation scheme for {network.CryptoCode} has been modified.";
-                return RedirectToAction(nameof(UpdateStore), new { storeId = storeId });
-            }
-            else
-            {
-                if (!string.IsNullOrEmpty(vm.DerivationScheme))
-                {
-                    var line = strategy.GetLineFor(DerivationFeature.Deposit);
-
-                    for (int i = 0; i < 10; i++)
-                    {
-                        var address = line.Derive((uint)i);
-                        vm.AddressSamples.Add((DerivationStrategyBase.GetKeyPath(DerivationFeature.Deposit).Derive((uint)i).ToString(), address.ScriptPubKey.GetDestinationAddress(network.NBitcoinNetwork).ToString()));
-                    }
-                }
-                vm.Confirmation = true;
-                return View(vm);
+                    CryptoCode = lightning.CryptoCode,
+                    Address = lightning.GetLightningChargeUrl(false).AbsoluteUri
+                });
             }
         }
 
@@ -525,7 +263,7 @@ namespace BTCPayServer.Controllers
             var store = await _Repo.FindStore(storeId, GetUserId());
             if (store == null)
                 return NotFound();
-            AddDerivationSchemes(store, model);
+            AddPaymentMethods(store, model);
 
             bool needUpdate = false;
             if (store.SpeedPolicy != model.SpeedPolicy)
@@ -591,7 +329,7 @@ namespace BTCPayServer.Controllers
             });
         }
 
-        private DerivationStrategyBase ParseDerivationStrategy(string derivationScheme, string format, BTCPayNetwork network)
+        private DerivationStrategy ParseDerivationStrategy(string derivationScheme, string format, BTCPayNetwork network)
         {
             if (format == "Electrum")
             {
@@ -625,7 +363,7 @@ namespace BTCPayServer.Controllers
                 }
             }
 
-            return new DerivationStrategyFactory(network.NBitcoinNetwork).Parse(derivationScheme);
+            return new DerivationStrategy(new DerivationStrategyFactory(network.NBitcoinNetwork).Parse(derivationScheme), network);
         }
 
         [HttpGet]
@@ -782,7 +520,7 @@ namespace BTCPayServer.Controllers
             var pairingResult = await _TokenRepository.PairWithStoreAsync(pairingCode, store.Id);
             if (pairingResult == PairingResult.Complete || pairingResult == PairingResult.Partial)
             {
-                StatusMessage = "Pairing is successfull";
+                StatusMessage = "Pairing is successful";
                 if (pairingResult == PairingResult.Partial)
                     StatusMessage = "Server initiated pairing code: " + pairingCode;
                 return RedirectToAction(nameof(ListTokens), new

BTCPayServer/Data/AddressInvoiceData.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
+using BTCPayServer.Payments;
 using BTCPayServer.Services.Invoices;
 using NBitcoin;
 
@@ -32,7 +33,7 @@ namespace BTCPayServer.Data
         }
         public AddressInvoiceData Set(string address, PaymentMethodId paymentMethodId)
         {
-            Address = address + "#" + paymentMethodId?.ToString();
+            Address = address + "#" + paymentMethodId.ToString();
             return this;
         }
         public PaymentMethodId GetpaymentMethodId()

BTCPayServer/Data/HistoricalAddressInvoiceData.cs

@@ -27,9 +27,10 @@ namespace BTCPayServer.Data
         public string CryptoCode { get; set; }
 
 #pragma warning disable CS0618
-        public string GetCryptoCode()
+        public Payments.PaymentMethodId GetPaymentMethodId()
         {
-            return string.IsNullOrEmpty(CryptoCode) ? "BTC" : CryptoCode;
+            return string.IsNullOrEmpty(CryptoCode) ? new Payments.PaymentMethodId("BTC", Payments.PaymentTypes.BTCLike)
+                                                    : Payments.PaymentMethodId.Parse(CryptoCode);
         }
         public string GetAddress()
         {

BTCPayServer/Data/StoreData.cs

@@ -12,6 +12,7 @@ using System.ComponentModel;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Linq;
 using BTCPayServer.Services.Rates;
+using BTCPayServer.Payments;
 
 namespace BTCPayServer.Data
 {
@@ -41,10 +42,12 @@ namespace BTCPayServer.Data
             set;
         }
 
-        public IEnumerable<DerivationStrategy> GetDerivationStrategies(BTCPayNetworkProvider networks)
+        public IEnumerable<ISupportedPaymentMethod> GetSupportedPaymentMethods(BTCPayNetworkProvider networks)
         {
 #pragma warning disable CS0618
             bool btcReturned = false;
+
+            // Legacy stuff which should go away
             if (!string.IsNullOrEmpty(DerivationStrategy))
             {
                 if (networks.BTC != null)
@@ -60,54 +63,63 @@ namespace BTCPayServer.Data
                 JObject strategies = JObject.Parse(DerivationStrategies);
                 foreach (var strat in strategies.Properties())
                 {
-                    var network = networks.GetNetwork(strat.Name);
+                    var paymentMethodId = PaymentMethodId.Parse(strat.Name);
+                    var network = networks.GetNetwork(paymentMethodId.CryptoCode);
                     if (network != null)
                     {
-                        if (network == networks.BTC && btcReturned)
+                        if (network == networks.BTC && paymentMethodId.PaymentType == PaymentTypes.BTCLike && btcReturned)
                             continue;
                         if (strat.Value.Type == JTokenType.Null)
                             continue;
-                        yield return BTCPayServer.DerivationStrategy.Parse(strat.Value.Value<string>(), network);
+                        yield return PaymentMethodExtensions.Deserialize(paymentMethodId, strat.Value, network);
                     }
                 }
             }
 #pragma warning restore CS0618
         }
 
-        public void SetDerivationStrategy(BTCPayNetwork network, string derivationScheme)
+        /// <summary>
+        /// Set or remove a new supported payment method for the store
+        /// </summary>
+        /// <param name="paymentMethodId">The paymentMethodId</param>
+        /// <param name="supportedPaymentMethod">The payment method, or null to remove</param>
+        public void SetSupportedPaymentMethod(PaymentMethodId paymentMethodId, ISupportedPaymentMethod supportedPaymentMethod)
         {
+            if (supportedPaymentMethod != null && paymentMethodId != supportedPaymentMethod.PaymentId)
+                throw new InvalidOperationException("Argument mismatch");
+
 #pragma warning disable CS0618
             JObject strategies = string.IsNullOrEmpty(DerivationStrategies) ? new JObject() : JObject.Parse(DerivationStrategies);
             bool existing = false;
             foreach (var strat in strategies.Properties().ToList())
             {
-                if (strat.Name == network.CryptoCode)
+                var stratId = PaymentMethodId.Parse(strat.Name);
+                if (stratId.IsBTCOnChain)
                 {
-                    if (network.IsBTC)
-                        DerivationStrategy = null;
-                    if (string.IsNullOrEmpty(derivationScheme))
+                    // Legacy stuff which should go away
+                    DerivationStrategy = null;
+                }
+                if (stratId == paymentMethodId)
+                {
+                    if (supportedPaymentMethod == null)
                     {
                         strat.Remove();
                     }
                     else
                     {
-                        strat.Value = new JValue(derivationScheme);
+                        strat.Value = PaymentMethodExtensions.Serialize(supportedPaymentMethod);
                     }
                     existing = true;
                     break;
                 }
             }
 
-            if (!existing && string.IsNullOrEmpty(derivationScheme))
+            if(!existing && supportedPaymentMethod == null && paymentMethodId.IsBTCOnChain)
             {
-                if (network.IsBTC)
-                    DerivationStrategy = null;
+                DerivationStrategy = null;
             }
-            else if (!existing)
-                strategies.Add(new JProperty(network.CryptoCode, new JValue(derivationScheme)));
-            // This is deprecated so we don't have to set anymore
-            //if (network.IsBTC)
-            //    DerivationStrategy = derivationScheme;
+            else if (!existing && supportedPaymentMethod != null)
+                strategies.Add(new JProperty(supportedPaymentMethod.PaymentId.ToString(), PaymentMethodExtensions.Serialize(supportedPaymentMethod)));
             DerivationStrategies = strategies.ToString();
 #pragma warning restore CS0618
         }

BTCPayServer/DerivationStrategy.cs

@@ -2,17 +2,19 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
+using BTCPayServer.Payments;
+using BTCPayServer.Services.Invoices;
 using NBitcoin;
 using NBXplorer.DerivationStrategy;
 
 namespace BTCPayServer
 {
-    public class DerivationStrategy
+    public class DerivationStrategy : ISupportedPaymentMethod
     {
         private DerivationStrategyBase _DerivationStrategy;
         private BTCPayNetwork _Network;
 
-        DerivationStrategy(DerivationStrategyBase result, BTCPayNetwork network)
+        public DerivationStrategy(DerivationStrategyBase result, BTCPayNetwork network)
         {
             this._DerivationStrategy = result;
             this._Network = network;
@@ -32,6 +34,8 @@ namespace BTCPayServer
 
         public DerivationStrategyBase DerivationStrategyBase { get { return this._DerivationStrategy; } }
 
+        public PaymentMethodId PaymentId => new PaymentMethodId(Network.CryptoCode, PaymentTypes.BTCLike);
+
         public override string ToString()
         {
             return _DerivationStrategy.ToString();

BTCPayServer/Eclair/AllChannelResponse.cs

@@ -1,14 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
-
-namespace BTCPayServer.Eclair
-{
-    public class AllChannelResponse
-    {
-        public string ShortChannelId { get; set; }
-        public string NodeId1 { get; set; }
-        public string NodeId2 { get; set; }
-    }
-}

BTCPayServer/Eclair/ChannelResponse.cs

@@ -1,21 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
-
-namespace BTCPayServer.Eclair
-{
-    public class ChannelResponse
-    {
-
-        public string NodeId { get; set; }
-        public string ChannelId { get; set; }
-        public string State { get; set; }
-    }
-    public static class ChannelStates
-    {
-        public const string WAIT_FOR_FUNDING_CONFIRMED = "WAIT_FOR_FUNDING_CONFIRMED";
-
-        public const string NORMAL = "NORMAL";
-    }
-}

BTCPayServer/Eclair/EclairRPCClient.cs

@@ -1,230 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-using System.Net;
-using System.Text;
-using System.Threading.Tasks;
-using NBitcoin;
-using NBitcoin.JsonConverters;
-using NBitcoin.RPC;
-
-namespace BTCPayServer.Eclair
-{
-    public class EclairRPCClient
-    {
-        public EclairRPCClient(Uri address, Network network)
-        {
-            if (address == null)
-                throw new ArgumentNullException(nameof(address));
-            if (network == null)
-                throw new ArgumentNullException(nameof(network));
-            Address = address;
-            Network = network;
-        }
-
-        public Network Network { get; private set; }
-
-
-        public GetInfoResponse GetInfo()
-        {
-            return GetInfoAsync().GetAwaiter().GetResult();
-        }
-
-        public Task<GetInfoResponse> GetInfoAsync()
-        {
-            return SendCommandAsync<GetInfoResponse>(new RPCRequest("getinfo", Array.Empty<object>()));
-        }
-
-        public async Task<T> SendCommandAsync<T>(RPCRequest request, bool throwIfRPCError = true)
-        {
-            var response = await SendCommandAsync(request, throwIfRPCError);
-            return Serializer.ToObject<T>(response.ResultString, Network);
-        }
-
-        public async Task<RPCResponse> SendCommandAsync(RPCRequest request, bool throwIfRPCError = true)
-        {
-            RPCResponse response = null;
-            HttpWebRequest webRequest = response == null ? CreateWebRequest() : null;
-            if (response == null)
-            {
-                var writer = new StringWriter();
-                request.WriteJSON(writer);
-                writer.Flush();
-                var json = writer.ToString();
-                var bytes = Encoding.UTF8.GetBytes(json);
-#if !(PORTABLE || NETCORE)
-                webRequest.ContentLength = bytes.Length;
-#endif
-                var dataStream = await webRequest.GetRequestStreamAsync().ConfigureAwait(false);
-                await dataStream.WriteAsync(bytes, 0, bytes.Length).ConfigureAwait(false);
-                await dataStream.FlushAsync().ConfigureAwait(false);
-                dataStream.Dispose();
-            }
-            WebResponse webResponse = null;
-            WebResponse errorResponse = null;
-            try
-            {
-                webResponse = response == null ? await webRequest.GetResponseAsync().ConfigureAwait(false) : null;
-                response = response ?? RPCResponse.Load(await ToMemoryStreamAsync(webResponse.GetResponseStream()).ConfigureAwait(false));
-
-                if (throwIfRPCError)
-                    response.ThrowIfError();
-            }
-            catch (WebException ex)
-            {
-                if (ex.Response == null || ex.Response.ContentLength == 0 ||
-                    !ex.Response.ContentType.Equals("application/json", StringComparison.Ordinal))
-                    throw;
-                errorResponse = ex.Response;
-                response = RPCResponse.Load(await ToMemoryStreamAsync(errorResponse.GetResponseStream()).ConfigureAwait(false));
-                if (throwIfRPCError)
-                    response.ThrowIfError();
-            }
-            finally
-            {
-                if (errorResponse != null)
-                {
-                    errorResponse.Dispose();
-                    errorResponse = null;
-                }
-                if (webResponse != null)
-                {
-                    webResponse.Dispose();
-                    webResponse = null;
-                }
-            }
-            return response;
-        }
-
-        public AllChannelResponse[] AllChannels()
-        {
-            return AllChannelsAsync().GetAwaiter().GetResult();
-        }
-
-        public async Task<AllChannelResponse[]> AllChannelsAsync()
-        {
-            return await SendCommandAsync<AllChannelResponse[]>(new RPCRequest("allchannels", Array.Empty<object>())).ConfigureAwait(false);
-        }
-
-        public string[] Channels()
-        {
-            return ChannelsAsync().GetAwaiter().GetResult();
-        }
-
-        public async Task<string[]> ChannelsAsync()
-        {
-            return await SendCommandAsync<string[]>(new RPCRequest("channels", Array.Empty<object>())).ConfigureAwait(false);
-        }
-
-        public void Close(string channelId)
-        {
-            CloseAsync(channelId).GetAwaiter().GetResult();
-        }
-
-        public async Task CloseAsync(string channelId)
-        {
-            if (channelId == null)
-                throw new ArgumentNullException(nameof(channelId));
-            try
-            {
-                await SendCommandAsync(new RPCRequest("close", new object[] { channelId })).ConfigureAwait(false);
-            }
-            catch (RPCException ex) when (ex.Message == "closing already in progress")
-            {
-                
-            }
-        }
-
-        public ChannelResponse Channel(string channelId)
-        {
-            return ChannelAsync(channelId).GetAwaiter().GetResult();
-        }
-
-        public async Task<ChannelResponse> ChannelAsync(string channelId)
-        {
-            if (channelId == null)
-                throw new ArgumentNullException(nameof(channelId));
-            return await SendCommandAsync<ChannelResponse>(new RPCRequest("channel", new object[] { channelId })).ConfigureAwait(false);
-        }
-
-        public string[] AllNodes()
-        {
-            return AllNodesAsync().GetAwaiter().GetResult();
-        }
-
-        public async Task<string[]> AllNodesAsync()
-        {
-            return await SendCommandAsync<string[]>(new RPCRequest("allnodes", Array.Empty<object>())).ConfigureAwait(false);
-        }
-
-        public Uri Address { get; private set; }
-
-        private HttpWebRequest CreateWebRequest()
-        {
-            var webRequest = (HttpWebRequest)WebRequest.Create(Address.AbsoluteUri);
-            webRequest.ContentType = "application/json";
-            webRequest.Method = "POST";
-            return webRequest;
-        }
-
-
-        private async Task<Stream> ToMemoryStreamAsync(Stream stream)
-        {
-            MemoryStream ms = new MemoryStream();
-            await stream.CopyToAsync(ms).ConfigureAwait(false);
-            ms.Position = 0;
-            return ms;
-        }
-
-        public string Open(NodeInfo node, Money fundingSatoshi, LightMoney pushAmount = null)
-        {
-            return OpenAsync(node, fundingSatoshi, pushAmount).GetAwaiter().GetResult();
-        }
-
-        public string Connect(NodeInfo node)
-        {
-            return ConnectAsync(node).GetAwaiter().GetResult();
-        }
-
-        public async Task<string> ConnectAsync(NodeInfo node)
-        {
-            if (node == null)
-                throw new ArgumentNullException(nameof(node));
-            return (await SendCommandAsync(new RPCRequest("connect", new object[] { node.NodeId, node.Host, node.Port })).ConfigureAwait(false)).ResultString;
-        }
-
-        public string Receive(LightMoney amount, string description = null)
-        {
-            return ReceiveAsync(amount, description).GetAwaiter().GetResult();
-        }
-
-        public async Task<string> ReceiveAsync(LightMoney amount, string description = null)
-        {
-            if (amount == null)
-                throw new ArgumentNullException(nameof(amount));
-            List<object> args = new List<object>();
-            args.Add(amount.MilliSatoshi);
-            if(description != null)
-            {
-                args.Add(description);
-            }
-            return (await SendCommandAsync(new RPCRequest("receive", args.ToArray())).ConfigureAwait(false)).ResultString;
-        }
-
-        public async Task<string> OpenAsync(NodeInfo node, Money fundingSatoshi, LightMoney pushAmount = null)
-        {
-            if (fundingSatoshi == null)
-                throw new ArgumentNullException(nameof(fundingSatoshi));
-            if (node == null)
-                throw new ArgumentNullException(nameof(node));
-            pushAmount = pushAmount ?? LightMoney.Zero;
-
-            var result = await SendCommandAsync(new RPCRequest("open", new object[] { node.NodeId, node.Host, node.Port, fundingSatoshi.Satoshi, pushAmount.MilliSatoshi }));
-
-            return result.ResultString;
-        }
-
-
-    }
-}

BTCPayServer/Eclair/GetInfoResponse.cs

@@ -1,18 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
-using NBitcoin;
-using Newtonsoft.Json;
-
-namespace BTCPayServer.Eclair
-{
-    public class GetInfoResponse
-    {
-        public string NodeId { get; set; }
-        public string Alias { get; set; }
-        public int Port { get; set; }
-        public uint256 ChainHash { get; set; }
-        public int BlockHeight { get; set; }
-    }
-}

BTCPayServer/ExplorerClientProvider.cs

@@ -77,7 +77,7 @@ namespace BTCPayServer
 
         public bool IsAvailable(string cryptoCode)
         {
-            return _Clients.ContainsKey(cryptoCode) && _Dashboard.IsFullySynched(cryptoCode);
+            return _Clients.ContainsKey(cryptoCode) && _Dashboard.IsFullySynched(cryptoCode, out var unused);
         }
 
         public BTCPayNetwork GetNetwork(string cryptoCode)

BTCPayServer/Extensions.cs

@@ -30,6 +30,19 @@ namespace BTCPayServer
 {
     public static class Extensions
     {
+        public static decimal RoundUp(decimal value, int precision)
+        {
+            for (int i = 0; i < precision; i++)
+            {
+                value = value * 10m;
+            }
+            value = Math.Ceiling(value);
+            for (int i = 0; i < precision; i++)
+            {
+                value = value / 10m;
+            }
+            return value;
+        }
         public static PaymentMethodId GetpaymentMethodId(this InvoiceCryptoInfo info)
         {
             return new PaymentMethodId(info.CryptoCode, Enum.Parse<PaymentTypes>(info.PaymentType));

BTCPayServer/HostedServices/InvoiceNotificationManager.cs

@@ -19,6 +19,7 @@ using Microsoft.Extensions.Hosting;
 using BTCPayServer.Events;
 using NBXplorer;
 using BTCPayServer.Services.Invoices;
+using BTCPayServer.Payments;
 
 namespace BTCPayServer.HostedServices
 {
@@ -74,7 +75,8 @@ namespace BTCPayServer.HostedServices
                 if (string.IsNullOrEmpty(invoice.NotificationURL))
                     return;
                 _EventAggregator.Publish<InvoiceIPNEvent>(new InvoiceIPNEvent(invoice.Id, eventCode, name));
-                await SendNotification(invoice, eventCode, name, cts.Token);
+                var response = await SendNotification(invoice, eventCode, name, cts.Token);
+                response.EnsureSuccessStatusCode();
                 return;
             }
             catch (OperationCanceledException) when (cts.IsCancellationRequested)
@@ -111,7 +113,7 @@ namespace BTCPayServer.HostedServices
             try
             {
                 HttpResponseMessage response = await SendNotification(job.Invoice, job.EventCode, job.Message, cts.Token);
-                reschedule = response.StatusCode != System.Net.HttpStatusCode.OK;
+                reschedule = !response.IsSuccessStatusCode;
                 Logger.LogInformation("Job " + jobId + " returned " + response.StatusCode);
 
                 _EventAggregator.Publish<InvoiceIPNEvent>(new InvoiceIPNEvent(job.Invoice.Id, job.EventCode, job.Message)

BTCPayServer/HostedServices/InvoiceWatcher.cs

@@ -70,7 +70,6 @@ namespace BTCPayServer.HostedServices
                 invoice.Status = "expired";
             }
 
-            var derivationStrategies = invoice.GetDerivationStrategies(_NetworkProvider).ToArray();
             var payments = invoice.GetPayments().Where(p => p.Accounted).ToArray();
             var allPaymentMethods = invoice.GetPaymentMethods(_NetworkProvider);
             var paymentMethod = GetNearestClearedPayment(allPaymentMethods, out var accounting, _NetworkProvider);

BTCPayServer/HostedServices/NBXplorerWaiter.cs

@@ -41,9 +41,11 @@ namespace BTCPayServer.HostedServices
             return _Summaries.All(s => s.Value.Status != null && s.Value.Status.IsFullySynched);
         }
 
-        public bool IsFullySynched(string cryptoCode)
+        public bool IsFullySynched(string cryptoCode, out NBXplorerSummary summary)
         {
-            return _Summaries.Any(s => s.Key.Equals(cryptoCode, StringComparison.OrdinalIgnoreCase) && s.Value.Status != null && s.Value.Status.IsFullySynched);
+            return _Summaries.TryGetValue(cryptoCode, out summary) && 
+                   summary.Status != null && 
+                   summary.Status.IsFullySynched;
         }
 
         public IEnumerable<NBXplorerSummary> GetAll()

BTCPayServer/Hosting/BTCPayServerServices.cs

@@ -37,6 +37,7 @@ using BTCPayServer.Authentication;
 using Microsoft.Extensions.Caching.Memory;
 using BTCPayServer.Logging;
 using BTCPayServer.HostedServices;
+using Meziantou.AspNetCore.BundleTagHelpers;
 
 namespace BTCPayServer.Hosting
 {
@@ -129,7 +130,7 @@ namespace BTCPayServer.Hosting
             services.TryAddSingleton<BTCPayNetworkProvider>(o => 
             {
                 var opts = o.GetRequiredService<BTCPayServerOptions>();
-                return new BTCPayNetworkProvider(opts.ChainType);
+                return opts.NetworkProvider;
             });
 
             services.TryAddSingleton<NBXplorerDashboard>();
@@ -142,8 +143,13 @@ namespace BTCPayServer.Hosting
                 BlockTarget = 20
             });
 
-            services.AddSingleton<IHostedService, NBXplorerWaiters>();
+            services.AddSingleton<Payments.IPaymentMethodHandler<DerivationStrategy>, Payments.Bitcoin.BitcoinLikePaymentHandler>();
             services.AddSingleton<IHostedService, Payments.Bitcoin.NBXplorerListener>();
+
+            services.AddSingleton<Payments.IPaymentMethodHandler<Payments.Lightning.LightningSupportedPaymentMethod>, Payments.Lightning.LightningLikePaymentHandler>();
+            services.AddSingleton<IHostedService, Payments.Lightning.ChargeListener>();
+
+            services.AddSingleton<IHostedService, NBXplorerWaiters>();
             services.AddSingleton<IHostedService, InvoiceNotificationManager>();
             services.AddSingleton<IHostedService, InvoiceWatcher>();
 
@@ -177,6 +183,18 @@ namespace BTCPayServer.Hosting
                 });
             });
 
+            // bundling
+
+            services.AddBundles();
+            services.AddTransient<BundleOptions>(provider =>
+            {
+                var opts = provider.GetRequiredService<BTCPayServerOptions>();
+                var bundle = new BundleOptions();
+                bundle.UseMinifiedFiles = opts.BundleJsCss;
+                bundle.AppendVersion = true;
+                return bundle;
+            });
+
             return services;
         }
 
@@ -192,7 +210,7 @@ namespace BTCPayServer.Hosting
             }
 
             app.UseMiddleware<BTCPayMiddleware>();
-            return app;
+            return app; 
         }
 
         static void Retry(Action act)

BTCPayServer/Hosting/Startup.cs

@@ -39,6 +39,7 @@ using Microsoft.ApplicationInsights.AspNetCore.Extensions;
 using Microsoft.AspNetCore.Mvc.Cors.Internal;
 using Microsoft.AspNetCore.Server.Kestrel.Core;
 using System.Net;
+using Meziantou.AspNetCore.BundleTagHelpers;
 
 namespace BTCPayServer.Hosting
 {

BTCPayServer/JsonConverters/LightMoneyJsonConverter.cs

@@ -0,0 +1,43 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Newtonsoft.Json;
+using System.Reflection;
+using BTCPayServer.Payments.Lightning;
+using NBitcoin.JsonConverters;
+using System.Globalization;
+
+namespace BTCPayServer.JsonConverters
+{
+    public class LightMoneyJsonConverter : JsonConverter
+    {
+        public override bool CanConvert(Type objectType)
+        {
+            return typeof(LightMoneyJsonConverter).GetTypeInfo().IsAssignableFrom(objectType.GetTypeInfo());
+        }
+
+        Type longType = typeof(long).GetTypeInfo();
+        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
+        {
+            try
+            {
+                return reader.TokenType == JsonToken.Null ? null :
+                    reader.TokenType == JsonToken.Integer ?
+                                                longType.IsAssignableFrom(reader.ValueType) ? new LightMoney((long)reader.Value)
+                                                                                            : new LightMoney(long.MaxValue) :
+                    reader.TokenType == JsonToken.String ? new LightMoney(long.Parse((string)reader.Value, CultureInfo.InvariantCulture)) 
+                    : null;
+            }
+            catch (InvalidCastException)
+            {
+                throw new JsonObjectException("Money amount should be in millisatoshi", reader);
+            }
+        }
+
+        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
+        {
+            writer.WriteValue(((LightMoney)value).MilliSatoshi);
+        }
+    }
+}

BTCPayServer/Models/InvoicingModels/InvoiceDetailsModel.cs

@@ -12,16 +12,22 @@ namespace BTCPayServer.Models.InvoicingModels
     {
         public class CryptoPayment
         {
-            public string CryptoCode { get; set; }
+            public string PaymentMethod { get; set; }
             public string Due { get; set; }
             public string Paid { get; set; }
             public string Address { get; internal set; }
             public string Rate { get; internal set; }
             public string PaymentUrl { get; internal set; }
         }
+        public class AddressModel
+        {
+            public string PaymentMethod { get; set; }
+            public string Destination { get; set; }
+            public bool Current { get; set; }
+        }
         public class Payment
         {
-            public string CryptoCode { get; set; }
+            public string PaymentMethod { get; set; }
             public string Confirmations
             {
                 get; set;
@@ -126,7 +132,7 @@ namespace BTCPayServer.Models.InvoicingModels
             get;
             internal set;
         }
-        public HistoricalAddressInvoiceData[] Addresses { get; set; }
+        public AddressModel[] Addresses { get; set; }
         public DateTimeOffset MonitoringDate { get; internal set; }
         public List<Data.InvoiceEventData> Events { get; internal set; }
     }

BTCPayServer/Models/InvoicingModels/InvoicesModel.cs

@@ -33,11 +33,13 @@ namespace BTCPayServer.Models.InvoicingModels
 
     public class InvoiceModel
     {
-        public DateTimeOffset Date
+        public string Date
         {
             get; set;
         }
 
+        public string OrderId { get; set; }
+        public string RedirectUrl { get; set; }
         public string InvoiceId
         {
             get; set;

BTCPayServer/Models/InvoicingModels/PaymentModel.cs

@@ -32,6 +32,7 @@ namespace BTCPayServer.Models.InvoicingModels
         public string Rate { get; set; }
         public string OrderAmount { get; set; }
         public string InvoiceBitcoinUrl { get; set; }
+        public string InvoiceBitcoinUrlQR { get; set; }
         public int TxCount { get; set; }
         public string BtcPaid { get; set; }
         public string StoreEmail { get; set; }

BTCPayServer/Models/StoreViewModels/LightningNodeViewModel.cs

@@ -0,0 +1,44 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Mvc.Rendering;
+
+namespace BTCPayServer.Models.StoreViewModels
+{
+    public class LightningNodeViewModel
+    {
+        class Format
+        {
+            public string Name { get; set; }
+            public string Value { get; set; }
+        }
+        [Display(Name = "Lightning charge url")]
+        public string Url
+        {
+            get;
+            set;
+        }
+
+        [Display(Name = "Crypto currency")]
+        public string CryptoCurrency
+        {
+            get;
+            set;
+        }
+        public SelectList CryptoCurrencies { get; set; }
+        public string StatusMessage { get; set; }
+        public string InternalLightningNode { get; internal set; }
+
+        public void SetCryptoCurrencies(BTCPayNetworkProvider networkProvider, string selectedScheme)
+        {
+            var choices = networkProvider.GetAll()
+                            .Where(n => n.CLightningNetworkName != null)
+                            .Select(o => new Format() { Name = o.CryptoCode, Value = o.CryptoCode }).ToArray();
+            var chosen = choices.FirstOrDefault(f => f.Name == selectedScheme) ?? choices.FirstOrDefault();
+            CryptoCurrencies = new SelectList(choices, nameof(chosen.Value), nameof(chosen.Name), chosen);
+            CryptoCurrency = chosen.Name;
+        }
+    }
+}

BTCPayServer/Models/StoreViewModels/StoreViewModel.cs

@@ -103,6 +103,16 @@ namespace BTCPayServer.Models.StoreViewModels
         [Display(Name = "Default crypto currency on checkout")]
         public string DefaultCryptoCurrency { get; set; }
 
+        public class LightningNode
+        {
+            public string CryptoCode { get; set; }
+            public string Address { get; set; }
+        }
+        public List<LightningNode> LightningNodes
+        {
+            get; set;
+        } = new List<LightningNode>();
+
         public void SetCryptoCurrencies(ExplorerClientProvider explorerProvider, string defaultCrypto)
         {
             var choices = explorerProvider.GetAll().Select(o => new Format() { Name = o.Item1.CryptoCode, Value = o.Item1.CryptoCode }).ToArray();

BTCPayServer/Payments/Bitcoin/BitcoinLikeOnChainPaymentMethod.cs

@@ -17,7 +17,7 @@ namespace BTCPayServer.Payments.Bitcoin
 
         public string GetPaymentDestination()
         {
-            return DepositAddress?.ToString();
+            return DepositAddress;
         }
 
         public decimal GetTxFee()
@@ -25,12 +25,15 @@ namespace BTCPayServer.Payments.Bitcoin
             return TxFee.ToDecimal(MoneyUnit.BTC);
         }
 
+        public void SetNoTxFee()
+        {
+            TxFee = Money.Zero;
+        }
+
+
         public void SetPaymentDestination(string newPaymentDestination)
         {
-            if (newPaymentDestination == null)
-                DepositAddress = null;
-            else
-                DepositAddress = BitcoinAddress.Create(newPaymentDestination, DepositAddress.Network);
+            DepositAddress = newPaymentDestination;
         }
 
         // Those properties are JsonIgnore because their data is inside CryptoData class for legacy reason
@@ -39,7 +42,11 @@ namespace BTCPayServer.Payments.Bitcoin
         [JsonIgnore]
         public Money TxFee { get; set; }
         [JsonIgnore]
-        public BitcoinAddress DepositAddress { get; set; }
+        public String DepositAddress { get; set; }
+        public BitcoinAddress GetDepositAddress(Network network)
+        {
+            return string.IsNullOrEmpty(DepositAddress) ? null : BitcoinAddress.Create(DepositAddress, network);
+        }
         ///////////////////////////////////////////////////////////////////////////////////////
     }
 }

BTCPayServer/Payments/Bitcoin/BitcoinLikePaymentHandler.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using BTCPayServer.Data;
+using BTCPayServer.Services;
+using BTCPayServer.Services.Invoices;
+using BTCPayServer.Services.Rates;
+using NBitcoin;
+
+namespace BTCPayServer.Payments.Bitcoin
+{
+    public class BitcoinLikePaymentHandler : PaymentMethodHandlerBase<DerivationStrategy>
+    {
+        ExplorerClientProvider _ExplorerProvider;
+        private IFeeProviderFactory _FeeRateProviderFactory;
+        private Services.Wallets.BTCPayWalletProvider _WalletProvider;
+
+        public BitcoinLikePaymentHandler(ExplorerClientProvider provider,
+                                         IFeeProviderFactory feeRateProviderFactory,
+                                         Services.Wallets.BTCPayWalletProvider walletProvider)
+        {
+            if (provider == null)
+                throw new ArgumentNullException(nameof(provider));
+            _ExplorerProvider = provider;
+            this._FeeRateProviderFactory = feeRateProviderFactory;
+            _WalletProvider = walletProvider;
+        }
+
+        public override async Task<IPaymentMethodDetails> CreatePaymentMethodDetails(DerivationStrategy supportedPaymentMethod, PaymentMethod paymentMethod, BTCPayNetwork network)
+        {
+            var getFeeRate = _FeeRateProviderFactory.CreateFeeProvider(network).GetFeeRateAsync();
+            var getAddress = _WalletProvider.GetWallet(network).ReserveAddressAsync(supportedPaymentMethod.DerivationStrategyBase);
+            Payments.Bitcoin.BitcoinLikeOnChainPaymentMethod onchainMethod = new Payments.Bitcoin.BitcoinLikeOnChainPaymentMethod();
+            onchainMethod.FeeRate = await getFeeRate;
+            onchainMethod.TxFee = onchainMethod.FeeRate.GetFee(100); // assume price for 100 bytes
+            onchainMethod.DepositAddress = (await getAddress).ToString();
+            return onchainMethod;
+        }
+
+        public override Task<bool> IsAvailable(DerivationStrategy supportedPaymentMethod, BTCPayNetwork network)
+        {
+            return Task.FromResult(_ExplorerProvider.IsAvailable(network));
+        }
+    }
+}

BTCPayServer/Payments/Bitcoin/NBXplorerListener.cs

@@ -21,6 +21,9 @@ using BTCPayServer.HostedServices;
 
 namespace BTCPayServer.Payments.Bitcoin
 {
+    /// <summary>
+    /// This class listener NBXplorer instances to detect incoming on-chain, bitcoin like payment
+    /// </summary>
     public class NBXplorerListener : IHostedService
     {
         EventAggregator _Aggregator;
@@ -30,10 +33,12 @@ namespace BTCPayServer.Payments.Bitcoin
         private TaskCompletionSource<bool> _RunningTask;
         private CancellationTokenSource _Cts;
         BTCPayWalletProvider _Wallets;
+        BTCPayNetworkProvider _NetworkProvider;
 
         public NBXplorerListener(ExplorerClientProvider explorerClients,
                                 BTCPayWalletProvider wallets,
                                 InvoiceRepository invoiceRepository,
+                                BTCPayNetworkProvider networkProvider,
                                 EventAggregator aggregator, IApplicationLifetime lifetime)
         {
             PollInterval = TimeSpan.FromMinutes(1.0);
@@ -42,10 +47,11 @@ namespace BTCPayServer.Payments.Bitcoin
             _ExplorerClients = explorerClients;
             _Aggregator = aggregator;
             _Lifetime = lifetime;
+            _NetworkProvider = networkProvider;
         }
 
         CompositeDisposable leases = new CompositeDisposable();
-        ConcurrentDictionary<string, NotificationSession> _Sessions = new ConcurrentDictionary<string, NotificationSession>();
+        ConcurrentDictionary<string, NotificationSession> _SessionsByCryptoCode = new ConcurrentDictionary<string, NotificationSession>();
         private Timer _ListenPoller;
 
         TimeSpan _PollInterval;
@@ -92,24 +98,6 @@ namespace BTCPayServer.Payments.Bitcoin
                 }
             }, null, 0, (int)PollInterval.TotalMilliseconds);
             leases.Add(_ListenPoller);
-
-            leases.Add(_Aggregator.Subscribe<Events.InvoiceEvent>(async inv =>
-            {
-                if (inv.Name == "invoice_created")
-                {
-                    var invoice = await _InvoiceRepository.GetInvoice(null, inv.InvoiceId);
-                    List<Task> listeningDerivations = new List<Task>();
-                    foreach (var notificationSessions in _Sessions)
-                    {
-                        var derivationStrategy = GetStrategy(notificationSessions.Key, invoice);
-                        if (derivationStrategy != null)
-                        {
-                            listeningDerivations.Add(notificationSessions.Value.ListenDerivationSchemesAsync(new[] { derivationStrategy }, _Cts.Token));
-                        }
-                    }
-                    await Task.WhenAll(listeningDerivations.ToArray()).ConfigureAwait(false);
-                }
-            }));
             return Task.CompletedTask;
         }
 
@@ -119,7 +107,7 @@ namespace BTCPayServer.Payments.Bitcoin
             bool cleanup = false;
             try
             {
-                if (_Sessions.ContainsKey(network.CryptoCode))
+                if (_SessionsByCryptoCode.ContainsKey(network.CryptoCode))
                     return;
                 var client = _ExplorerClients.GetExplorerClient(network);
                 if (client == null)
@@ -127,7 +115,7 @@ namespace BTCPayServer.Payments.Bitcoin
                 if (_Cts.IsCancellationRequested)
                     return;
                 var session = await client.CreateNotificationSessionAsync(_Cts.Token).ConfigureAwait(false);
-                if (!_Sessions.TryAdd(network.CryptoCode, session))
+                if (!_SessionsByCryptoCode.TryAdd(network.CryptoCode, session))
                 {
                     await session.DisposeAsync();
                     return;
@@ -137,7 +125,7 @@ namespace BTCPayServer.Payments.Bitcoin
                 using (session)
                 {
                     await session.ListenNewBlockAsync(_Cts.Token).ConfigureAwait(false);
-                    await session.ListenDerivationSchemesAsync((await GetStrategies(network)).ToArray(), _Cts.Token).ConfigureAwait(false);
+                    await session.ListenAllDerivationSchemesAsync(cancellation: _Cts.Token).ConfigureAwait(false);
 
                     Logs.PayServer.LogInformation($"{network.CryptoCode}: Checking if any pending invoice got paid while offline...");
                     int paymentCount = await FindPaymentViaPolling(wallet, network);
@@ -172,7 +160,8 @@ namespace BTCPayServer.Payments.Bitcoin
                                             if (!alreadyExist)
                                             {
                                                 var payment = await _InvoiceRepository.AddPayment(invoice.Id, DateTimeOffset.UtcNow, paymentData, network.CryptoCode);
-                                                await ReceivedPayment(wallet, invoice.Id, payment, evt.DerivationStrategy);
+                                                if(payment != null)
+                                                    await ReceivedPayment(wallet, invoice.Id, payment, evt.DerivationStrategy);
                                             }
                                             else
                                             {
@@ -199,8 +188,8 @@ namespace BTCPayServer.Payments.Bitcoin
                 if (cleanup)
                 {
                     Logs.PayServer.LogInformation($"Disconnected from WebSocket of NBXplorer ({network.CryptoCode})");
-                    _Sessions.TryRemove(network.CryptoCode, out NotificationSession unused);
-                    if (_Sessions.Count == 0 && _Cts.IsCancellationRequested)
+                    _SessionsByCryptoCode.TryRemove(network.CryptoCode, out NotificationSession unused);
+                    if (_SessionsByCryptoCode.Count == 0 && _Cts.IsCancellationRequested)
                     {
                         _RunningTask.TrySetResult(true);
                     }
@@ -211,7 +200,7 @@ namespace BTCPayServer.Payments.Bitcoin
         IEnumerable<BitcoinLikePaymentData> GetAllBitcoinPaymentData(InvoiceEntity invoice)
         {
             return invoice.GetPayments()
-                    .Where(p => p.GetpaymentMethodId().PaymentType == PaymentTypes.BTCLike)
+                    .Where(p => p.GetPaymentMethodId().PaymentType == PaymentTypes.BTCLike)
                     .Select(p => (BitcoinLikePaymentData)p.GetCryptoPaymentData());
         }
 
@@ -225,7 +214,7 @@ namespace BTCPayServer.Payments.Bitcoin
             var conflicts = GetConflicts(transactions.Select(t => t.Value));
             foreach (var payment in invoice.GetPayments(wallet.Network))
             {
-                if (payment.GetpaymentMethodId().PaymentType !=  PaymentTypes.BTCLike)
+                if (payment.GetPaymentMethodId().PaymentType != PaymentTypes.BTCLike)
                     continue;
                 var paymentData = (BitcoinLikePaymentData)payment.GetCryptoPaymentData();
                 if (!transactions.TryGetValue(paymentData.Outpoint.Hash, out TransactionResult tx))
@@ -243,7 +232,7 @@ namespace BTCPayServer.Payments.Bitcoin
 
                 if (paymentData.ConfirmationCount != tx.Confirmations)
                 {
-                    if(wallet.Network.MaxTrackedConfirmation >= paymentData.ConfirmationCount)
+                    if (wallet.Network.MaxTrackedConfirmation >= paymentData.ConfirmationCount)
                     {
                         paymentData.ConfirmationCount = tx.Confirmations;
                         payment.SetCryptoPaymentData(paymentData);
@@ -277,7 +266,7 @@ namespace BTCPayServer.Payments.Bitcoin
                     }
                     else
                     {
-                        // Take the most recent (bitcoin node would not forward a conflict without a successfull RBF)
+                        // Take the most recent (bitcoin node would not forward a conflict without a successful RBF)
                         _Winner = Transactions
                                 .OrderByDescending(t => t.Value.Timestamp)
                                 .First()
@@ -327,7 +316,7 @@ namespace BTCPayServer.Payments.Bitcoin
             {
                 var invoice = await _InvoiceRepository.GetInvoice(null, invoiceId, true);
                 var alreadyAccounted = GetAllBitcoinPaymentData(invoice).Select(p => p.Outpoint).ToHashSet();
-                var strategy = invoice.GetDerivationStrategy(network);
+                var strategy = GetDerivationStrategy(invoice, network);
                 if (strategy == null)
                     continue;
                 var cryptoId = new PaymentMethodId(network.CryptoCode, PaymentTypes.BTCLike);
@@ -342,25 +331,33 @@ namespace BTCPayServer.Payments.Bitcoin
                     var paymentData = new BitcoinLikePaymentData(coin.Coin, transaction.Transaction.RBF);
                     var payment = await _InvoiceRepository.AddPayment(invoice.Id, coin.Timestamp, paymentData, network.CryptoCode).ConfigureAwait(false);
                     alreadyAccounted.Add(coin.Coin.Outpoint);
-                    invoice = await ReceivedPayment(wallet, invoice.Id, payment, strategy);
+                    if (payment != null)
+                        invoice = await ReceivedPayment(wallet, invoice.Id, payment, strategy);
                     totalPayment++;
                 }
             }
             return totalPayment;
         }
 
+        private DerivationStrategyBase GetDerivationStrategy(InvoiceEntity invoice, BTCPayNetwork network)
+        {
+            return invoice.GetSupportedPaymentMethod<DerivationStrategy>(new PaymentMethodId(network.CryptoCode, PaymentTypes.BTCLike), _ExplorerClients.NetworkProviders)
+                          .Select(d => d.DerivationStrategyBase)
+                          .FirstOrDefault();
+        }
+
         private async Task<InvoiceEntity> ReceivedPayment(BTCPayWallet wallet, string invoiceId, PaymentEntity payment, DerivationStrategyBase strategy)
         {
             var paymentData = (BitcoinLikePaymentData)payment.GetCryptoPaymentData();
             var invoice = (await UpdatePaymentStates(wallet, invoiceId));
             var paymentMethod = invoice.GetPaymentMethod(wallet.Network, PaymentTypes.BTCLike, _ExplorerClients.NetworkProviders);
             if (paymentMethod != null &&
-                paymentMethod.GetPaymentMethodDetails() is BitcoinLikeOnChainPaymentMethod btc && 
-                btc.DepositAddress.ScriptPubKey == paymentData.Output.ScriptPubKey && 
+                paymentMethod.GetPaymentMethodDetails() is BitcoinLikeOnChainPaymentMethod btc &&
+                btc.GetDepositAddress(wallet.Network.NBitcoinNetwork).ScriptPubKey == paymentData.Output.ScriptPubKey &&
                 paymentMethod.Calculate().Due > Money.Zero)
             {
                 var address = await wallet.ReserveAddressAsync(strategy);
-                btc.DepositAddress = address;
+                btc.DepositAddress = address.ToString();
                 await _InvoiceRepository.NewAddress(invoiceId, btc, wallet.Network);
                 _Aggregator.Publish(new InvoiceNewAddressEvent(invoiceId, address.ToString(), wallet.Network));
                 paymentMethod.SetPaymentMethodDetails(btc);
@@ -370,33 +367,6 @@ namespace BTCPayServer.Payments.Bitcoin
             _Aggregator.Publish(new InvoiceEvent(invoiceId, 1002, "invoice_receivedPayment"));
             return invoice;
         }
-
-        private async Task<List<DerivationStrategyBase>> GetStrategies(BTCPayNetwork network)
-        {
-            List<DerivationStrategyBase> strategies = new List<DerivationStrategyBase>();
-            foreach (var invoiceId in await _InvoiceRepository.GetPendingInvoices())
-            {
-                var invoice = await _InvoiceRepository.GetInvoice(null, invoiceId);
-                var strategy = GetStrategy(network.CryptoCode, invoice);
-                if (strategy != null)
-                    strategies.Add(strategy);
-            }
-
-            return strategies;
-        }
-
-        private DerivationStrategyBase GetStrategy(string cryptoCode, InvoiceEntity invoice)
-        {
-            foreach (var derivationStrategy in invoice.GetDerivationStrategies(_ExplorerClients.NetworkProviders))
-            {
-                if (derivationStrategy.Network.CryptoCode == cryptoCode)
-                {
-                    return derivationStrategy.DerivationStrategyBase;
-                }
-            }
-            return null;
-        }
-
         public Task StopAsync(CancellationToken cancellationToken)
         {
             leases.Dispose();

BTCPayServer/Payments/IPaymentMethodDetails.cs

@@ -6,11 +6,27 @@ using NBitcoin;
 
 namespace BTCPayServer.Payments
 {
+    /// <summary>
+    /// Represent information necessary to track a payment
+    /// </summary>
     public interface IPaymentMethodDetails
     {
+        /// <summary>
+        /// A string representation of the payment destination
+        /// </summary>
+        /// <returns></returns>
         string GetPaymentDestination();
         PaymentTypes GetPaymentType();
+        /// <summary>
+        /// Returns what a merchant would need to pay to cashout this payment
+        /// </summary>
+        /// <returns></returns>
         decimal GetTxFee();
+        void SetNoTxFee();
+        /// <summary>
+        /// Change the payment destination (internal plumbing)
+        /// </summary>
+        /// <param name="newPaymentDestination"></param>
         void SetPaymentDestination(string newPaymentDestination);
     }
 }

BTCPayServer/Payments/IPaymentMethodHandler.cs

@@ -0,0 +1,62 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using BTCPayServer.Services.Invoices;
+
+namespace BTCPayServer.Payments
+{
+    /// <summary>
+    /// This class customize invoice creation by the creation of payment details for the PaymentMethod during invoice creation
+    /// </summary>
+    public interface IPaymentMethodHandler
+    {
+        /// <summary>
+        /// Returns true if the dependencies for a specific payment method are satisfied. 
+        /// </summary>
+        /// <param name="supportedPaymentMethod"></param>
+        /// <param name="network"></param>
+        /// <returns>true if this payment method is available</returns>
+        Task<bool> IsAvailable(ISupportedPaymentMethod supportedPaymentMethod, BTCPayNetwork network);
+
+        /// <summary>
+        /// Create needed to track payments of this invoice
+        /// </summary>
+        /// <param name="supportedPaymentMethod"></param>
+        /// <param name="paymentMethod"></param>
+        /// <param name="network"></param>
+        /// <returns></returns>
+        Task<IPaymentMethodDetails> CreatePaymentMethodDetails(ISupportedPaymentMethod supportedPaymentMethod, PaymentMethod paymentMethod, BTCPayNetwork network);
+    }
+
+    public interface IPaymentMethodHandler<T> : IPaymentMethodHandler where T : ISupportedPaymentMethod
+    {
+        Task<bool> IsAvailable(T supportedPaymentMethod, BTCPayNetwork network);
+        Task<IPaymentMethodDetails> CreatePaymentMethodDetails(T supportedPaymentMethod, PaymentMethod paymentMethod, BTCPayNetwork network);
+    }
+
+    public abstract class PaymentMethodHandlerBase<T> : IPaymentMethodHandler<T> where T : ISupportedPaymentMethod
+    {
+        public abstract Task<IPaymentMethodDetails> CreatePaymentMethodDetails(T supportedPaymentMethod, PaymentMethod paymentMethod, BTCPayNetwork network);
+
+        Task<IPaymentMethodDetails> IPaymentMethodHandler.CreatePaymentMethodDetails(ISupportedPaymentMethod supportedPaymentMethod, PaymentMethod paymentMethod, BTCPayNetwork network)
+        {
+            if (supportedPaymentMethod is T method)
+            {
+                return CreatePaymentMethodDetails(method, paymentMethod, network);
+            }
+            throw new NotSupportedException("Invalid supportedPaymentMethod");
+        }
+
+        public abstract Task<bool> IsAvailable(T supportedPaymentMethod, BTCPayNetwork network);
+
+        Task<bool> IPaymentMethodHandler.IsAvailable(ISupportedPaymentMethod supportedPaymentMethod, BTCPayNetwork network)
+        {
+            if(supportedPaymentMethod is T method)
+            { 
+                return IsAvailable(method, network);
+            }
+            return Task.FromResult(false);
+        }
+    }
+}

BTCPayServer/Payments/ISupportedPaymentMethod.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using BTCPayServer.Services.Invoices;
+
+namespace BTCPayServer.Payments
+{
+    /// <summary>
+    /// This class represent a mode of payment supported by a store.
+    /// It is stored at the store level and cloned to the invoice during invoice creation.
+    /// This object will be serialized in database in json
+    /// </summary>
+    public interface ISupportedPaymentMethod
+    {
+        PaymentMethodId PaymentId { get; }
+    }
+}

BTCPayServer/Payments/Lightning/CLightning/ChargeClient.cs

@@ -0,0 +1,130 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Net;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Net.WebSockets;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using NBitcoin;
+using NBXplorer;
+using Newtonsoft.Json;
+
+namespace BTCPayServer.Payments.Lightning.CLightning
+{
+    public class ChargeClient
+    {
+        private Uri _Uri;
+        public Uri Uri
+        {
+            get
+            {
+                return _Uri;
+            }
+        }
+        private Network _Network;
+        static HttpClient _Client = new HttpClient();
+
+        public ChargeClient(Uri uri, Network network)
+        {
+            if (uri == null)
+                throw new ArgumentNullException(nameof(uri));
+            if (network == null)
+                throw new ArgumentNullException(nameof(network));
+            this._Uri = uri;
+            this._Network = network;
+            if (uri.UserInfo == null)
+                throw new ArgumentException(paramName: nameof(uri), message: "User information not present in uri");
+            var userInfo = uri.UserInfo.Split(':');
+            if (userInfo.Length != 2)
+                throw new ArgumentException(paramName: nameof(uri), message: "User information not present in uri");
+            Credentials = new NetworkCredential(userInfo[0], userInfo[1]);
+        }
+
+        public async Task<CreateInvoiceResponse> CreateInvoiceAsync(CreateInvoiceRequest request, CancellationToken cancellation = default(CancellationToken))
+        {
+            var message = CreateMessage(HttpMethod.Post, "invoice");
+            Dictionary<string, string> parameters = new Dictionary<string, string>();
+            parameters.Add("msatoshi", request.Amont.MilliSatoshi.ToString(CultureInfo.InvariantCulture));
+            parameters.Add("expiry", ((int)request.Expiry.TotalSeconds).ToString(CultureInfo.InvariantCulture));
+            message.Content = new FormUrlEncodedContent(parameters);
+            var result = await _Client.SendAsync(message, cancellation);
+            result.EnsureSuccessStatusCode();
+            var content = await result.Content.ReadAsStringAsync();
+            return JsonConvert.DeserializeObject<CreateInvoiceResponse>(content);
+        }
+
+        public async Task<ChargeSession> Listen(CancellationToken cancellation = default(CancellationToken))
+        {
+            var socket = new ClientWebSocket();
+            socket.Options.SetRequestHeader("Authorization", $"Basic {GetBase64Creds()}");
+            var uri = new UriBuilder(Uri) { UserName = null, Password = null }.Uri.AbsoluteUri;
+            if (!uri.EndsWith('/'))
+                uri += "/";
+            uri += "ws";
+            uri = ToWebsocketUri(uri);
+            await socket.ConnectAsync(new Uri(uri), cancellation);
+            return new ChargeSession(socket);
+        }
+
+        private static string ToWebsocketUri(string uri)
+        {
+            if (uri.StartsWith("https://", StringComparison.OrdinalIgnoreCase))
+                uri = uri.Replace("https://", "wss://", StringComparison.OrdinalIgnoreCase);
+            if (uri.StartsWith("http://", StringComparison.OrdinalIgnoreCase))
+                uri = uri.Replace("http://", "ws://", StringComparison.OrdinalIgnoreCase);
+            return uri;
+        }
+
+        public NetworkCredential Credentials { get; set; }
+
+        public GetInfoResponse GetInfo()
+        {
+            return GetInfoAsync().GetAwaiter().GetResult();
+        }
+
+        public async Task<ChargeInvoice> GetInvoice(string invoiceId, CancellationToken cancellation = default(CancellationToken))
+        {
+            var request = CreateMessage(HttpMethod.Get, $"invoice/{invoiceId}");
+            var message = await _Client.SendAsync(request, cancellation);
+            if (message.StatusCode == HttpStatusCode.NotFound)
+                return null;
+            message.EnsureSuccessStatusCode();
+            var content = await message.Content.ReadAsStringAsync();
+            return JsonConvert.DeserializeObject<ChargeInvoice>(content);
+        }
+
+        public async Task<GetInfoResponse> GetInfoAsync(CancellationToken cancellation = default(CancellationToken))
+        {
+            var request = CreateMessage(HttpMethod.Get, "info");
+            var message = await _Client.SendAsync(request, cancellation);
+            message.EnsureSuccessStatusCode();
+            var content = await message.Content.ReadAsStringAsync();
+            return JsonConvert.DeserializeObject<GetInfoResponse>(content);
+        }
+
+        private HttpRequestMessage CreateMessage(HttpMethod method, string path)
+        {
+            var uri = GetFullUri(path);
+            var request = new HttpRequestMessage(method, uri);
+            request.Headers.Authorization = new AuthenticationHeaderValue("Basic", GetBase64Creds());
+            return request;
+        }
+
+        private string GetBase64Creds()
+        {
+            return Convert.ToBase64String(Encoding.ASCII.GetBytes($"{Credentials.UserName}:{Credentials.Password}"));
+        }
+
+        private Uri GetFullUri(string partialUrl)
+        {
+            var uri = _Uri.AbsoluteUri;
+            if (!uri.EndsWith("/", StringComparison.InvariantCultureIgnoreCase))
+                uri += "/";
+            return new Uri(uri + partialUrl);
+        }
+    }
+}

BTCPayServer/Payments/Lightning/CLightning/ChargeSession.cs

@@ -0,0 +1,124 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.WebSockets;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using NBXplorer;
+using Newtonsoft.Json;
+
+namespace BTCPayServer.Payments.Lightning.CLightning
+{
+    public class ChargeInvoice
+    {
+        public string Id { get; set; }
+
+        [JsonProperty("msatoshi")]
+        [JsonConverter(typeof(JsonConverters.LightMoneyJsonConverter))]
+        public LightMoney MilliSatoshi { get; set; }
+        [JsonProperty("paid_at")]
+        [JsonConverter(typeof(NBitcoin.JsonConverters.DateTimeToUnixTimeConverter))]
+        public DateTimeOffset? PaidAt { get; set; }
+        [JsonProperty("expires_at")]
+        [JsonConverter(typeof(NBitcoin.JsonConverters.DateTimeToUnixTimeConverter))]
+        public DateTimeOffset? ExpiresAt { get; set; }
+        public string Status { get; set; }
+
+        [JsonProperty("payreq")]
+        public string PaymentRequest { get; set; }
+    }
+    public class ChargeSession : IDisposable
+    {
+        private ClientWebSocket socket;
+
+        const int ORIGINAL_BUFFER_SIZE = 1024 * 5;
+        const int MAX_BUFFER_SIZE = 1024 * 1024 * 5;
+        public ChargeSession(ClientWebSocket socket)
+        {
+            this.socket = socket;
+            var buffer = new byte[ORIGINAL_BUFFER_SIZE];
+            _Buffer = new ArraySegment<byte>(buffer, 0, buffer.Length);
+        }
+
+        ArraySegment<byte> _Buffer;
+        public async Task<ChargeInvoice> NextEvent(CancellationToken cancellation = default(CancellationToken))
+        {
+            var buffer = _Buffer;
+            var array = _Buffer.Array;
+            var originalSize = _Buffer.Array.Length;
+            var newSize = _Buffer.Array.Length;
+            while (true)
+            {
+                var message = await socket.ReceiveAsync(buffer, cancellation);
+                if (message.MessageType == WebSocketMessageType.Close)
+                {
+                    await CloseSocketAndThrow(WebSocketCloseStatus.NormalClosure, "Close message received from the peer", cancellation);
+                    break;
+                }
+                if (message.MessageType != WebSocketMessageType.Text)
+                {
+                    await CloseSocketAndThrow(WebSocketCloseStatus.InvalidMessageType, "Only Text is supported", cancellation);
+                    break;
+                }
+                if (message.EndOfMessage)
+                {
+                    buffer = new ArraySegment<byte>(array, 0, buffer.Offset + message.Count);
+                    try
+                    {
+                        var o = ParseMessage(buffer);
+                        if (newSize != originalSize)
+                        {
+                            Array.Resize(ref array, originalSize);
+                        }
+                        return o;
+                    }
+                    catch (Exception ex)
+                    {
+                        await CloseSocketAndThrow(WebSocketCloseStatus.InvalidPayloadData, $"Invalid payload: {ex.Message}", cancellation);
+                    }
+                }
+                else
+                {
+                    if (buffer.Count - message.Count <= 0)
+                    {
+                        newSize *= 2;
+                        if (newSize > MAX_BUFFER_SIZE)
+                            await CloseSocketAndThrow(WebSocketCloseStatus.MessageTooBig, "Message is too big", cancellation);
+                        Array.Resize(ref array, newSize);
+                        buffer = new ArraySegment<byte>(array, buffer.Offset, newSize - buffer.Offset);
+                    }
+
+                    buffer = buffer.Slice(message.Count, buffer.Count - message.Count);
+                }
+            }
+            throw new InvalidOperationException("Should never happen");
+        }
+
+        UTF8Encoding UTF8 = new UTF8Encoding(false, true);
+        private ChargeInvoice ParseMessage(ArraySegment<byte> buffer)
+        {
+            var str = UTF8.GetString(buffer.Array, 0, buffer.Count);
+            return JsonConvert.DeserializeObject<ChargeInvoice>(str, new JsonSerializerSettings());
+        }
+
+        private async Task CloseSocketAndThrow(WebSocketCloseStatus status, string description, CancellationToken cancellation)
+        {
+            var array = _Buffer.Array;
+            if (array.Length != ORIGINAL_BUFFER_SIZE)
+                Array.Resize(ref array, ORIGINAL_BUFFER_SIZE);
+            await socket.CloseSocket(status, description, cancellation);
+            throw new WebSocketException($"The socket has been closed ({status}: {description})");
+        }
+
+        public async void Dispose()
+        {
+            await this.socket.CloseSocket();
+        }
+
+        public async Task DisposeAsync()
+        {
+            await this.socket.CloseSocket();
+        }
+    }
+}

BTCPayServer/Payments/Lightning/CLightning/CreateInvoiceRequest.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace BTCPayServer.Payments.Lightning.CLightning
+{
+    public class CreateInvoiceRequest
+    {
+        public LightMoney Amont { get; set; }
+        public TimeSpan Expiry { get; set; }
+    }
+}

BTCPayServer/Payments/Lightning/CLightning/CreateInvoiceResponse.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace BTCPayServer.Payments.Lightning.CLightning
+{
+    public class CreateInvoiceResponse
+    {
+        public string PayReq { get; set; }
+        public string Id { get; set; }
+    }
+}

BTCPayServer/Payments/Lightning/CLightning/GetInfoResponse.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace BTCPayServer.Payments.Lightning.CLightning
+{
+    //[{"type":"ipv4","address":"52.166.90.122","port":9735}]
+    public class GetInfoResponse
+    {
+        public class GetInfoAddress
+        {
+            public string Type { get; set; }
+            public string Address { get; set; }
+            public int Port { get; set; }
+        }
+        public string Id { get; set; }
+        public int Port { get; set; }
+        public GetInfoAddress[] Address { get; set; }
+        public string Version { get; set; }
+        public int BlockHeight { get; set; }
+        public string Network { get; set; }
+    }
+}

BTCPayServer/Payments/Lightning/CLightning/RPC/CLightningRPCClient.cs

@@ -0,0 +1,118 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Net;
+using System.Net.Sockets;
+using System.Text;
+using System.Threading.Tasks;
+using NBitcoin;
+using NBitcoin.RPC;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+
+namespace BTCPayServer.Payments.Lightning.CLightning.RPC
+{
+    public class CLightningRPCClient
+    {
+        public Network Network { get; private set; }
+        public Uri Address { get; private set; }
+
+        public CLightningRPCClient(Uri address, Network network)
+        {
+            if (address == null)
+                throw new ArgumentNullException(nameof(address));
+            if (network == null)
+                throw new ArgumentNullException(nameof(network));
+            Address = address;
+            Network = network;
+        }
+
+        public Task<GetInfoResponse> GetInfoAsync()
+        {
+            return SendCommandAsync<GetInfoResponse>("getinfo");
+        }
+
+        public Task SendAsync(string bolt11)
+        {
+            return SendCommandAsync<object>("pay", new[] { bolt11 }, true);
+        }
+
+        public async Task<PeerInfo[]> ListPeersAsync()
+        {
+            var peers = await SendCommandAsync<PeerInfo[]>("listpeers", isArray: true);
+            foreach(var peer in peers)
+            {
+                peer.Channels = peer.Channels ?? Array.Empty<ChannelInfo>();
+            }
+            return peers;
+        }
+
+        public Task FundChannelAsync(NodeInfo nodeInfo, Money money)
+        {
+            return SendCommandAsync<object>("fundchannel", new object[] { nodeInfo.NodeId, money.Satoshi }, true);
+        }
+
+        public Task ConnectAsync(NodeInfo nodeInfo)
+        {
+            return SendCommandAsync<object>("connect", new[] { $"{nodeInfo.NodeId}@{nodeInfo.Host}:{nodeInfo.Port}" }, true);
+        }
+
+        static Encoding UTF8 = new UTF8Encoding(false);
+        private async Task<T> SendCommandAsync<T>(string command, object[] parameters = null, bool noReturn = false, bool isArray = false)
+        {
+            parameters = parameters ?? Array.Empty<string>();
+            var domain = Address.DnsSafeHost;
+            if (!IPAddress.TryParse(domain, out IPAddress address))
+            {
+                address = (await Dns.GetHostAddressesAsync(domain)).FirstOrDefault();
+                if (address == null)
+                    throw new Exception("Host not found");
+            }
+            Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
+            await socket.ConnectAsync(new IPEndPoint(address, Address.Port));
+            using (var networkStream = new NetworkStream(socket))
+            {
+                using (var textWriter = new StreamWriter(networkStream, UTF8, 1024 * 10, true))
+                {
+                    using (var jsonWriter = new JsonTextWriter(textWriter))
+                    {
+                        var req = new JObject();
+                        req.Add("id", 0);
+                        req.Add("method", command);
+                        req.Add("params", new JArray(parameters));
+                        await req.WriteToAsync(jsonWriter);
+                        await jsonWriter.FlushAsync();
+                    }
+                    await textWriter.FlushAsync();
+                }
+                await networkStream.FlushAsync();
+                using (var textReader = new StreamReader(networkStream, UTF8, false, 1024 * 10, true))
+                {
+                    using (var jsonReader = new JsonTextReader(textReader))
+                    {
+                        var result = await JObject.LoadAsync(jsonReader);
+                        var error = result.Property("error");
+                        if(error != null)
+                        {
+                            throw new Exception(error.Value.ToString());
+                        }
+                        if (noReturn)
+                            return default(T);
+                        if (isArray)
+                        {
+                            return result["result"].Children().First().Children().First().ToObject<T>();
+                        }
+                        return result["result"].ToObject<T>();
+                    }
+                }
+            }
+        }
+
+        public async Task<BitcoinAddress> NewAddressAsync()
+        {
+            var obj = await SendCommandAsync<JObject>("newaddr");
+            return BitcoinAddress.Create(obj.Property("address").Value.Value<string>(), Network);
+        }
+    }
+}

BTCPayServer/Payments/Lightning/CLightning/RPC/NodeInfo.cs

@@ -3,7 +3,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
 
-namespace BTCPayServer.Eclair
+namespace BTCPayServer.Payments.Lightning.CLightning.RPC
 {
     public class NodeInfo
     {

BTCPayServer/Payments/Lightning/CLightning/RPC/PeerInfo.cs

@@ -0,0 +1,60 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using NBitcoin;
+using Newtonsoft.Json;
+
+namespace BTCPayServer.Payments.Lightning.CLightning.RPC
+{
+    public class ChannelInfo
+    {
+        public string State { get; set; }
+        public string Owner { get; set; }
+
+        [JsonProperty("funding_txid")]
+        [JsonConverter(typeof(NBitcoin.JsonConverters.UInt256JsonConverter))]
+        public uint256 FundingTxId { get; set; }
+
+        [JsonProperty("msatoshi_to_us")]
+        [JsonConverter(typeof(JsonConverters.LightMoneyJsonConverter))]
+        public LightMoney ToUs { get; set; }
+
+        [JsonProperty("msatoshi_total")]
+        [JsonConverter(typeof(JsonConverters.LightMoneyJsonConverter))]
+        public LightMoney Total { get; set; }
+
+        [JsonProperty("dust_limit_satoshis")]
+        [JsonConverter(typeof(NBitcoin.JsonConverters.MoneyJsonConverter))]
+        public Money DustLimit { get; set; }
+
+        [JsonProperty("max_htlc_value_in_flight_msat")]
+        [JsonConverter(typeof(JsonConverters.LightMoneyJsonConverter))]
+        public LightMoney MaxHTLCValueInFlight { get; set; }
+
+        [JsonProperty("channel_reserve_satoshis")]
+        [JsonConverter(typeof(NBitcoin.JsonConverters.MoneyJsonConverter))]
+        public Money ChannelReserve { get; set; }
+
+        [JsonProperty("htlc_minimum_msat")]
+        [JsonConverter(typeof(JsonConverters.LightMoneyJsonConverter))]
+        public LightMoney HTLCMinimum { get; set; }
+
+        [JsonProperty("to_self_delay")]
+        public int ToSelfDelay { get; set; }
+        [JsonProperty("max_accepted_htlcs")]
+        public int MaxAcceptedHTLCS { get; set; }
+        public string[] Status { get; set; }
+    }
+    public class PeerInfo
+    {
+        public string State { get; set; }
+        public string Id { get; set; }
+        [JsonProperty("netaddr")]
+        public string[] NetworkAddresses { get; set; }
+        public bool Connected { get; set; }
+        public string Owner { get; set; }
+        public ChannelInfo[] Channels { get; set; }
+
+    }
+}

BTCPayServer/Payments/Lightning/ChargeListener.cs

@@ -0,0 +1,271 @@
+using System;
+using Microsoft.Extensions.Logging;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using BTCPayServer.Events;
+using BTCPayServer.Logging;
+using BTCPayServer.Payments.Lightning.CLightning;
+using BTCPayServer.Services.Invoices;
+using Microsoft.Extensions.Hosting;
+using NBXplorer;
+
+namespace BTCPayServer.Payments.Lightning
+{
+    public class ChargeListener : IHostedService
+    {
+        class ListenedInvoice
+        {
+            public LightningLikePaymentMethodDetails PaymentMethodDetails { get; set; }
+            public LightningSupportedPaymentMethod SupportedPaymentMethod { get; set; }
+            public PaymentMethod PaymentMethod { get; set; }
+            public string Uri { get; internal set; }
+            public BTCPayNetwork Network { get; internal set; }
+            public string InvoiceId { get; internal set; }
+        }
+
+        EventAggregator _Aggregator;
+        InvoiceRepository _InvoiceRepository;
+        BTCPayNetworkProvider _NetworkProvider;
+        public ChargeListener(EventAggregator aggregator,
+                              InvoiceRepository invoiceRepository,
+                              BTCPayNetworkProvider networkProvider)
+        {
+            _Aggregator = aggregator;
+            _InvoiceRepository = invoiceRepository;
+            _NetworkProvider = networkProvider;
+        }
+
+        CompositeDisposable leases = new CompositeDisposable();
+        public Task StartAsync(CancellationToken cancellationToken)
+        {
+            leases.Add(_Aggregator.Subscribe<Events.InvoiceEvent>(async inv =>
+            {
+                if (inv.Name == "invoice_created")
+                {
+                    await EnsureListening(inv.InvoiceId, false);
+                }
+            }));
+
+            _ListenPoller = new Timer(async s =>
+            {
+                await Task.WhenAll((await _InvoiceRepository.GetPendingInvoices())
+                .Select(async invoiceId => await EnsureListening(invoiceId, true))
+                .ToArray());
+            }, null, 0, (int)PollInterval.TotalMilliseconds);
+            leases.Add(_ListenPoller);
+            return Task.CompletedTask;
+        }
+
+        private async Task EnsureListening(string invoiceId, bool poll)
+        {
+            if (Listening(invoiceId))
+                return;
+            var invoice = await _InvoiceRepository.GetInvoice(null, invoiceId);
+            foreach (var paymentMethod in invoice.GetPaymentMethods(_NetworkProvider)
+                                                          .Where(c => c.GetId().PaymentType == PaymentTypes.LightningLike))
+            {
+                var lightningMethod = paymentMethod.GetPaymentMethodDetails() as LightningLikePaymentMethodDetails;
+                if (lightningMethod == null)
+                    continue;
+                var lightningSupportedMethod = invoice.GetSupportedPaymentMethod<LightningSupportedPaymentMethod>(_NetworkProvider)
+                                          .FirstOrDefault(c => c.CryptoCode == paymentMethod.GetId().CryptoCode);
+                if (lightningSupportedMethod == null)
+                    continue;
+                var network = _NetworkProvider.GetNetwork(paymentMethod.GetId().CryptoCode);
+
+                var listenedInvoice = new ListenedInvoice()
+                {
+                    Uri = lightningSupportedMethod.GetLightningChargeUrl(false).AbsoluteUri,
+                    PaymentMethodDetails = lightningMethod,
+                    SupportedPaymentMethod = lightningSupportedMethod,
+                    PaymentMethod = paymentMethod,
+                    Network = network,
+                    InvoiceId = invoice.Id
+                };
+
+                if (poll)
+                {
+                    var charge = GetChargeClient(lightningSupportedMethod, network);
+                    var chargeInvoice = await charge.GetInvoice(lightningMethod.InvoiceId);
+                    if (chargeInvoice == null)
+                        continue;
+                    if (chargeInvoice.Status == "paid")
+                        await AddPayment(network, chargeInvoice, listenedInvoice);
+                    if (chargeInvoice.Status == "paid" || chargeInvoice.Status == "expired")
+                        continue;
+                }
+
+                StartListening(listenedInvoice);
+            }
+        }
+
+        TimeSpan _PollInterval = TimeSpan.FromMinutes(1.0);
+        public TimeSpan PollInterval
+        {
+            get
+            {
+                return _PollInterval;
+            }
+            set
+            {
+                _PollInterval = value;
+                if (_ListenPoller != null)
+                {
+                    _ListenPoller.Change(0, (int)value.TotalMilliseconds);
+                }
+            }
+        }
+
+        CancellationTokenSource _Cts = new CancellationTokenSource();
+        private async Task Listen(LightningSupportedPaymentMethod supportedPaymentMethod, BTCPayNetwork network)
+        {
+            try
+            {
+                Logs.PayServer.LogInformation($"{supportedPaymentMethod.CryptoCode} (Lightning): Start listening {supportedPaymentMethod.GetLightningChargeUrl(false)}");
+                var charge = GetChargeClient(supportedPaymentMethod, network);
+                var session = await charge.Listen(_Cts.Token);
+                while (true)
+                {
+                    var notification = await session.NextEvent(_Cts.Token);
+                    ListenedInvoice listenedInvoice = GetListenedInvoice(notification.Id);
+                    if (listenedInvoice == null)
+                        continue;
+
+                    if (notification.Id == listenedInvoice.PaymentMethodDetails.InvoiceId &&
+                       notification.PaymentRequest == listenedInvoice.PaymentMethodDetails.BOLT11)
+                    {
+                        if (notification.Status == "paid" && notification.PaidAt.HasValue)
+                        {
+                            await AddPayment(network, notification, listenedInvoice);
+                            if (DoneListening(listenedInvoice))
+                                break;
+                        }
+                        if (notification.Status == "expired")
+                        {
+                            if (DoneListening(listenedInvoice))
+                                break;
+                        }
+                    }
+                }
+            }
+            catch when (_Cts.IsCancellationRequested)
+            {
+            }
+            catch (Exception ex)
+            {
+                Logs.PayServer.LogError(ex, $"{supportedPaymentMethod.CryptoCode} (Lightning): Error while contacting {supportedPaymentMethod.GetLightningChargeUrl(false)}");
+                DoneListening(supportedPaymentMethod.GetLightningChargeUrl(false));
+            }
+            Logs.PayServer.LogInformation($"{supportedPaymentMethod.CryptoCode} (Lightning): Stop listening {supportedPaymentMethod.GetLightningChargeUrl(false)}");
+        }
+
+        private async Task AddPayment(BTCPayNetwork network, ChargeInvoice notification, ListenedInvoice listenedInvoice)
+        {
+            var payment = await _InvoiceRepository.AddPayment(listenedInvoice.InvoiceId, notification.PaidAt.Value, new LightningLikePaymentData()
+            {
+                BOLT11 = notification.PaymentRequest,
+                Amount = notification.MilliSatoshi
+            }, network.CryptoCode, accounted: true);
+            if(payment != null)
+                _Aggregator.Publish(new InvoiceEvent(listenedInvoice.InvoiceId, 1002, "invoice_receivedPayment"));
+        }
+
+        private static ChargeClient GetChargeClient(LightningSupportedPaymentMethod supportedPaymentMethod, BTCPayNetwork network)
+        {
+            return new ChargeClient(supportedPaymentMethod.GetLightningChargeUrl(true), network.NBitcoinNetwork);
+        }
+
+        List<Task> _ListeningLightning = new List<Task>();
+        MultiValueDictionary<string, ListenedInvoice> _ListenedInvoiceByLightningUrl = new MultiValueDictionary<string, ListenedInvoice>();
+        Dictionary<string, ListenedInvoice> _ListenedInvoiceByChargeInvoiceId = new Dictionary<string, ListenedInvoice>();
+        HashSet<string> _InvoiceIds = new HashSet<string>();
+        private Timer _ListenPoller;
+
+        /// <summary>
+        /// Stop listening an invoice
+        /// </summary>
+        /// <param name="listenedInvoice">The invoice to stop listening</param>
+        /// <returns>true if still need to listen the lightning instance</returns>
+        bool DoneListening(ListenedInvoice listenedInvoice)
+        {
+            lock (_ListenedInvoiceByLightningUrl)
+            {
+                _ListenedInvoiceByChargeInvoiceId.Remove(listenedInvoice.PaymentMethodDetails.InvoiceId);
+                _ListenedInvoiceByLightningUrl.Remove(listenedInvoice.Uri, listenedInvoice);
+                _InvoiceIds.Remove(listenedInvoice.InvoiceId);
+                if (!_ListenedInvoiceByLightningUrl.ContainsKey(listenedInvoice.Uri))
+                {
+                    return true;
+                }
+            }
+            return false;
+        }
+
+        /// <summary>
+        /// Stop listening all invoices on this server
+        /// </summary>
+        /// <param name="uri"></param>
+        private void DoneListening(Uri uri)
+        {
+            lock (_ListenedInvoiceByChargeInvoiceId)
+            {
+                foreach (var listenedInvoice in _ListenedInvoiceByLightningUrl[uri.AbsoluteUri])
+                {
+                    _ListenedInvoiceByChargeInvoiceId.Remove(listenedInvoice.PaymentMethodDetails.InvoiceId);
+                    _InvoiceIds.Remove(listenedInvoice.InvoiceId);
+                }
+                _ListenedInvoiceByLightningUrl.Remove(uri.AbsoluteUri);
+            }
+        }
+
+        bool Listening(string invoiceId)
+        {
+            lock (_ListenedInvoiceByLightningUrl)
+            {
+                return _InvoiceIds.Contains(invoiceId);
+            }
+        }
+
+        private ListenedInvoice GetListenedInvoice(string chargeInvoiceId)
+        {
+            ListenedInvoice listenedInvoice = null;
+            lock (_ListenedInvoiceByLightningUrl)
+            {
+                _ListenedInvoiceByChargeInvoiceId.TryGetValue(chargeInvoiceId, out listenedInvoice);
+            }
+            return listenedInvoice;
+        }
+
+        bool StartListening(ListenedInvoice listenedInvoice)
+        {
+            lock (_ListenedInvoiceByLightningUrl)
+            {
+                if (_InvoiceIds.Contains(listenedInvoice.InvoiceId))
+                    return false;
+                if (!_ListenedInvoiceByLightningUrl.ContainsKey(listenedInvoice.Uri))
+                {
+                    var listen = Listen(listenedInvoice.SupportedPaymentMethod, listenedInvoice.Network);
+                    _ListeningLightning.Add(listen);
+                }
+                _ListenedInvoiceByLightningUrl.Add(listenedInvoice.Uri, listenedInvoice);
+                _ListenedInvoiceByChargeInvoiceId.Add(listenedInvoice.PaymentMethodDetails.InvoiceId, listenedInvoice);
+                _InvoiceIds.Add(listenedInvoice.InvoiceId);
+            }
+            return true;
+        }
+
+        public async Task StopAsync(CancellationToken cancellationToken)
+        {
+            leases.Dispose();
+            _Cts.Cancel();
+            Task[] listening = null;
+            lock (_ListenedInvoiceByLightningUrl)
+            {
+                listening = _ListeningLightning.ToArray();
+            }
+            await Task.WhenAll(listening);
+        }
+    }
+}

BTCPayServer/Payments/Lightning/LightMoney.cs

@@ -3,8 +3,9 @@ using System.Collections.Generic;
 using System.Globalization;
 using System.Linq;
 using System.Threading.Tasks;
+using NBitcoin;
 
-namespace BTCPayServer.Eclair
+namespace BTCPayServer.Payments.Lightning
 {
     public enum LightMoneyUnit : ulong
     {
@@ -94,28 +95,31 @@ namespace BTCPayServer.Eclair
             return a;
         }
 
-        public LightMoney(int satoshis)
+        public LightMoney(int msatoshis)
         {
-            MilliSatoshi = satoshis;
+            MilliSatoshi = msatoshis;
         }
 
-        public LightMoney(uint satoshis)
+        public LightMoney(uint msatoshis)
         {
-            MilliSatoshi = satoshis;
+            MilliSatoshi = msatoshis;
+        }
+        public LightMoney(Money money)
+        {
+            MilliSatoshi = checked(money.Satoshi * 1000);
+        }
+        public LightMoney(long msatoshis)
+        {
+            MilliSatoshi = msatoshis;
         }
 
-        public LightMoney(long satoshis)
-        {
-            MilliSatoshi = satoshis;
-        }
-
-        public LightMoney(ulong satoshis)
+        public LightMoney(ulong msatoshis)
         {
             // overflow check. 
             // ulong.MaxValue is greater than long.MaxValue
             checked
             {
-                MilliSatoshi = (long)satoshis;
+                MilliSatoshi = (long)msatoshis;
             }
         }
 
@@ -171,7 +175,7 @@ namespace BTCPayServer.Eclair
             CheckMoneyUnit(unit, "unit");
             // overflow safe because (long / int) always fit in decimal 
             // decimal operations are checked by default
-            return (decimal)MilliSatoshi / (int)unit;
+            return (decimal)MilliSatoshi / (ulong)unit;
         }
         /// <summary>
         /// Convert Money to decimal (same as ToUnit)

BTCPayServer/Payments/Lightning/LightningLikePaymentData.cs

@@ -0,0 +1,47 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using BTCPayServer.JsonConverters;
+using BTCPayServer.Payments.Lightning;
+using BTCPayServer.Services.Invoices;
+using Newtonsoft.Json;
+
+namespace BTCPayServer.Payments.Lightning
+{
+    public class LightningLikePaymentData : CryptoPaymentData
+    {
+        [JsonConverter(typeof(LightMoneyJsonConverter))]
+        public LightMoney Amount { get; set; }
+        public string BOLT11 { get; set; }
+        public string GetPaymentId()
+        {
+            return BOLT11;
+        }
+
+        public PaymentTypes GetPaymentType()
+        {
+            return PaymentTypes.LightningLike;
+        }
+
+        public string[] GetSearchTerms()
+        {
+            return new[] { BOLT11 };
+        }
+
+        public decimal GetValue()
+        {
+            return Amount.ToDecimal(LightMoneyUnit.BTC);
+        }
+
+        public bool PaymentCompleted(PaymentEntity entity, BTCPayNetwork network)
+        {
+            return true;
+        }
+
+        public bool PaymentConfirmed(PaymentEntity entity, SpeedPolicy speedPolicy, BTCPayNetwork network)
+        {
+            return true;
+        }
+    }
+}

BTCPayServer/Payments/Lightning/LightningLikePaymentHandler.cs

@@ -0,0 +1,137 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Net.Sockets;
+using System.Threading;
+using System.Threading.Tasks;
+using BTCPayServer.HostedServices;
+using BTCPayServer.Payments.Lightning.CLightning;
+using BTCPayServer.Services.Invoices;
+
+namespace BTCPayServer.Payments.Lightning
+{
+    public class LightningLikePaymentHandler : PaymentMethodHandlerBase<LightningSupportedPaymentMethod>
+    {
+        NBXplorerDashboard _Dashboard;
+        public LightningLikePaymentHandler(NBXplorerDashboard dashboard)
+        {
+            _Dashboard = dashboard;
+        }
+        public override async Task<IPaymentMethodDetails> CreatePaymentMethodDetails(LightningSupportedPaymentMethod supportedPaymentMethod, PaymentMethod paymentMethod, BTCPayNetwork network)
+        {
+            var invoice = paymentMethod.ParentEntity;
+            var due = Extensions.RoundUp(invoice.ProductInformation.Price / paymentMethod.Rate, 8);
+            var client = GetClient(supportedPaymentMethod, network);
+            var expiry = invoice.ExpirationTime - DateTimeOffset.UtcNow;
+            var lightningInvoice = await client.CreateInvoiceAsync(new CreateInvoiceRequest()
+            {
+                Amont = new LightMoney(due, LightMoneyUnit.BTC),
+                Expiry = expiry < TimeSpan.Zero ? TimeSpan.FromSeconds(1) : expiry
+            });
+            return new LightningLikePaymentMethodDetails()
+            {
+                BOLT11 = lightningInvoice.PayReq,
+                InvoiceId = lightningInvoice.Id
+            };
+        }
+
+        public async override Task<bool> IsAvailable(LightningSupportedPaymentMethod supportedPaymentMethod, BTCPayNetwork network)
+        {
+            try
+            {
+                await Test(supportedPaymentMethod, network);
+                return true;
+            }
+            catch { return false; }
+        }
+
+        public async Task Test(LightningSupportedPaymentMethod supportedPaymentMethod, BTCPayNetwork network)
+        {
+            if (!_Dashboard.IsFullySynched(network.CryptoCode, out var summary))
+                throw new Exception($"Full node not available");
+
+            
+            var cts = new CancellationTokenSource(5000);
+            var client = GetClient(supportedPaymentMethod, network);
+            GetInfoResponse info = null;
+            try
+            {
+
+                info = await client.GetInfoAsync(cts.Token);
+            }
+            catch (Exception ex)
+            {
+                throw new Exception($"Error while connecting to the lightning charge {client.Uri} ({ex.Message})");
+            }
+            var address = info.Address.Select(a=>a.Address).FirstOrDefault();
+            var port = info.Port;
+            address = address ?? client.Uri.DnsSafeHost;
+
+            if (info.Network != network.CLightningNetworkName)
+            {
+                throw new Exception($"Lightning node network {info.Network}, but expected is {network.CLightningNetworkName}");
+            }
+
+            var blocksGap = Math.Abs(info.BlockHeight - summary.Status.ChainHeight);
+            if (blocksGap > 10)
+            {
+                throw new Exception($"The lightning is not synched ({blocksGap} blocks)");
+            }
+
+            try
+            {
+                await TestConnection(address, port, cts.Token);
+            }
+            catch (Exception ex)
+            {
+                throw new Exception($"Error while connecting to the lightning node via {address}:{port} ({ex.Message})");
+            }
+        }
+
+        private static ChargeClient GetClient(LightningSupportedPaymentMethod supportedPaymentMethod, BTCPayNetwork network)
+        {
+            return new ChargeClient(supportedPaymentMethod.GetLightningChargeUrl(true), network.NBitcoinNetwork);
+        }
+
+        private async Task<bool> TestConnection(string addressStr, int port, CancellationToken cancellation)
+        {
+            IPAddress address = null;
+            try
+            {
+                address = IPAddress.Parse(addressStr);
+            }
+            catch
+            {
+                try
+                {
+                    address = (await Dns.GetHostAddressesAsync(addressStr)).FirstOrDefault();
+                }
+                catch { }
+            }
+
+            if (address == null)
+                throw new Exception($"DNS did not resolved {addressStr}");
+
+            using (var tcp = new Socket(address.AddressFamily, SocketType.Stream, ProtocolType.Tcp))
+            {
+                try
+                {
+                    await WithTimeout(tcp.ConnectAsync(new IPEndPoint(address, port)), cancellation);
+                }
+                catch { return false; }
+            }
+            return true;
+        }
+
+        static Task WithTimeout(Task task, CancellationToken token)
+        {
+            TaskCompletionSource<bool> tcs = new TaskCompletionSource<bool>();
+            var registration = token.Register(() => { try { tcs.TrySetResult(true); } catch { } });
+#pragma warning disable CA2008 // Do not create tasks without passing a TaskScheduler
+            var timeoutTask = tcs.Task;
+#pragma warning restore CA2008 // Do not create tasks without passing a TaskScheduler
+            return Task.WhenAny(task, timeoutTask).Unwrap().ContinueWith(t => registration.Dispose(), TaskScheduler.Default);
+        }
+    }
+}

BTCPayServer/Payments/Lightning/LightningLikePaymentMethodDetails.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace BTCPayServer.Payments.Lightning
+{
+    public class LightningLikePaymentMethodDetails : IPaymentMethodDetails
+    {
+        public string BOLT11 { get; set; }
+        public string InvoiceId { get; set; }
+
+        public string GetPaymentDestination()
+        {
+            return BOLT11;
+        }
+
+        public PaymentTypes GetPaymentType()
+        {
+            return PaymentTypes.LightningLike;
+        }
+
+        public decimal GetTxFee()
+        {
+            return 0.0m;
+        }
+
+        public void SetNoTxFee()
+        {
+        }
+
+        public void SetPaymentDestination(string newPaymentDestination)
+        {
+            BOLT11 = newPaymentDestination;
+        }
+    }
+}

BTCPayServer/Payments/Lightning/LightningSupportedPaymentMethod.cs

@@ -0,0 +1,49 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace BTCPayServer.Payments.Lightning
+{
+    public class LightningSupportedPaymentMethod : ISupportedPaymentMethod
+    {
+        public string CryptoCode { get; set; }
+        [Obsolete("Use Get/SetLightningChargeUrl")]
+        public string LightningChargeUrl { get; set; }
+
+        public Uri GetLightningChargeUrl(bool withCredentials)
+        {
+#pragma warning disable CS0618 // Type or member is obsolete
+            UriBuilder uri = new UriBuilder(LightningChargeUrl);
+            if (withCredentials)
+            {
+                uri.UserName = Username;
+                uri.Password = Password;
+            }
+#pragma warning restore CS0618 // Type or member is obsolete
+            return uri.Uri;
+        }
+
+        public void SetLightningChargeUrl(Uri uri)
+        {
+            if (uri == null)
+                throw new ArgumentNullException(nameof(uri));
+            if (string.IsNullOrEmpty(uri.UserInfo))
+                throw new ArgumentException(paramName: nameof(uri), message: "Uri should have credential information");
+            var splitted = uri.UserInfo.Split(':');
+            if (splitted.Length != 2)
+                throw new ArgumentException(paramName: nameof(uri), message: "Uri should have credential information");
+#pragma warning disable CS0618 // Type or member is obsolete
+            Username = splitted[0];
+            Password = splitted[1];
+            LightningChargeUrl = new UriBuilder(uri) { UserName = "", Password = "" }.Uri.AbsoluteUri;
+#pragma warning restore CS0618 // Type or member is obsolete
+        }
+
+        [Obsolete("Use Get/SetLightningChargeUrl")]
+        public string Username { get; set; }
+        [Obsolete("Use Get/SetLightningChargeUrl")]
+        public string Password { get; set; }
+        public PaymentMethodId PaymentId => new PaymentMethodId(CryptoCode, PaymentTypes.LightningLike);
+    }
+}

BTCPayServer/Payments/PaymentMethodExtensions.cs

@@ -0,0 +1,58 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+
+namespace BTCPayServer.Payments
+{
+    public class PaymentMethodExtensions
+    {
+        public static ISupportedPaymentMethod Deserialize(PaymentMethodId paymentMethodId, JToken value, BTCPayNetwork network)
+        {
+            // Legacy
+            if (paymentMethodId.PaymentType == PaymentTypes.BTCLike)
+            {
+                return BTCPayServer.DerivationStrategy.Parse(((JValue)value).Value<string>(), network);
+            }
+            //////////
+            else if (paymentMethodId.PaymentType == PaymentTypes.LightningLike)
+            {
+                return JsonConvert.DeserializeObject<Payments.Lightning.LightningSupportedPaymentMethod>(value.ToString());
+            }
+            throw new NotSupportedException();
+        }
+
+        public static IPaymentMethodDetails DeserializePaymentMethodDetails(PaymentMethodId paymentMethodId, JObject jobj)
+        {
+            if(paymentMethodId.PaymentType == PaymentTypes.BTCLike)
+            {
+                return JsonConvert.DeserializeObject<Payments.Bitcoin.BitcoinLikeOnChainPaymentMethod>(jobj.ToString());
+            }
+            if (paymentMethodId.PaymentType == PaymentTypes.LightningLike)
+            {
+                return JsonConvert.DeserializeObject<Payments.Lightning.LightningLikePaymentMethodDetails>(jobj.ToString());
+            }
+            throw new NotSupportedException(paymentMethodId.PaymentType.ToString());
+        }
+
+
+        public static JToken Serialize(ISupportedPaymentMethod factory)
+        {
+            // Legacy
+            if (factory.PaymentId.PaymentType == PaymentTypes.BTCLike)
+            {
+                return new JValue(((DerivationStrategy)factory).DerivationStrategyBase.ToString());
+            }
+            //////////////
+            else
+            {
+                var str = JsonConvert.SerializeObject(factory);
+                return JObject.Parse(str);
+            }
+            throw new NotSupportedException();
+        }
+
+    }
+}

BTCPayServer/Payments/PaymentMethodId.cs

@@ -0,0 +1,76 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace BTCPayServer.Payments
+{
+
+    /// <summary>
+    /// A value object which represent a crypto currency with his payment type (ie, onchain or offchain)
+    /// </summary>
+    public class PaymentMethodId
+    {
+        public PaymentMethodId(string cryptoCode, PaymentTypes paymentType)
+        {
+            if (cryptoCode == null)
+                throw new ArgumentNullException(nameof(cryptoCode));
+            PaymentType = paymentType;
+            CryptoCode = cryptoCode;
+        }
+
+        [Obsolete("Should only be used for legacy stuff")]
+        public bool IsBTCOnChain
+        {
+            get
+            {
+                return CryptoCode == "BTC" && PaymentType == PaymentTypes.BTCLike;
+            }
+        }
+
+        public string CryptoCode { get; private set; }
+        public PaymentTypes PaymentType { get; private set; }
+
+
+        public override bool Equals(object obj)
+        {
+            PaymentMethodId item = obj as PaymentMethodId;
+            if (item == null)
+                return false;
+            return ToString().Equals(item.ToString(), StringComparison.InvariantCulture);
+        }
+        public static bool operator ==(PaymentMethodId a, PaymentMethodId b)
+        {
+            if (System.Object.ReferenceEquals(a, b))
+                return true;
+            if (((object)a == null) || ((object)b == null))
+                return false;
+            return a.ToString() == b.ToString();
+        }
+
+        public static bool operator !=(PaymentMethodId a, PaymentMethodId b)
+        {
+            return !(a == b);
+        }
+
+        public override int GetHashCode()
+        {
+#pragma warning disable CA1307 // Specify StringComparison
+            return ToString().GetHashCode();
+#pragma warning restore CA1307 // Specify StringComparison
+        }
+
+        public override string ToString()
+        {
+            if (PaymentType == PaymentTypes.BTCLike)
+                return CryptoCode;
+            return CryptoCode + "_" + PaymentType.ToString();
+        }
+
+        public static PaymentMethodId Parse(string str)
+        {
+            var parts = str.Split('_');
+            return new PaymentMethodId(parts[0], parts.Length == 1 ? PaymentTypes.BTCLike : Enum.Parse<PaymentTypes>(parts[1]));
+        }
+    }
+}

BTCPayServer/Payments/PaymentTypes.cs

@@ -5,8 +5,18 @@ using System.Threading.Tasks;
 
 namespace BTCPayServer.Payments
 {
+    /// <summary>
+    /// The different ways to pay an invoice
+    /// </summary>
     public enum PaymentTypes
     {
-        BTCLike
+        /// <summary>
+        /// On-Chain UTXO based, bitcoin compatible
+        /// </summary>
+        BTCLike,
+        /// <summary>
+        /// Lightning payment
+        /// </summary>
+        LightningLike
     }
 }

BTCPayServer/Properties/launchSettings.json

@@ -1,17 +1,5 @@
 {
-  "iisSettings": {
-    "windowsAuthentication": false,
-    "anonymousAuthentication": true,
-    "iisExpress": {
-      "applicationUrl": "http://localhost:14139/",
-      "sslPort": 0
-    }
-  },
   "profiles": {
-    "Default": {
-      "commandName": "Project",
-      "commandLineArgs": "--network testnet --chains ltc --ltcexplorerurl http://127.0.0.1:2727/"
-    },
     "Docker-Regtest": {
       "commandName": "Project",
       "launchBrowser": true,
@@ -20,10 +8,11 @@
         "BTCPAY_LTCEXPLORERURL": "http://127.0.0.1:32838/",
         "BTCPAY_BTCEXPLORERURL": "http://127.0.0.1:32838/",
         "ASPNETCORE_ENVIRONMENT": "Development",
+        "BTCPAY_INTERNALLIGHTNINGNODE": "http://api-token:foiewnccewuify@127.0.0.1:54938/",
         "BTCPAY_CHAINS": "btc,ltc",
         "BTCPAY_POSTGRES": "User ID=postgres;Host=127.0.0.1;Port=39372;Database=btcpayserver"
       },
       "applicationUrl": "http://localhost:14142/"
     }
   }
-}
+}

BTCPayServer/Services/BTCPayServerEnvironment.cs

@@ -35,6 +35,14 @@ namespace BTCPayServer.Services
         {
             get; set;
         }
+
+        public bool IsDevelopping
+        {
+            get
+            {
+                return ChainType == ChainType.Regtest && Environment.IsDevelopment();
+            }
+        }
         public override string ToString()
         {
             StringBuilder txt = new StringBuilder();

BTCPayServer/Services/HardwareWalletService.cs

@@ -152,7 +152,8 @@ namespace BTCPayServer.Services
                                                              (IDestination destination, Money amount, bool substractFees)[] send, 
                                                              FeeRate feeRate, 
                                                              IDestination changeAddress,
-                                                             KeyPath changeKeyPath)
+                                                             KeyPath changeKeyPath,
+                                                             FeeRate minTxRelayFee)
         {
             if (strategy == null)
                 throw new ArgumentNullException(nameof(strategy));
@@ -185,6 +186,7 @@ namespace BTCPayServer.Services
             }
 
             TransactionBuilder builder = new TransactionBuilder();
+            builder.StandardTransactionPolicy.MinRelayTxFee = minTxRelayFee;
             builder.AddCoins(coins.Select(c=>c.Coin).ToArray());
 
             foreach (var element in send)

BTCPayServer/Services/Invoices/InvoiceEntity.cs

@@ -162,38 +162,24 @@ namespace BTCPayServer.Services.Invoices
             set;
         }
 
-        [Obsolete("Use GetDerivationStrategies instead")]
+        [Obsolete("Use GetPaymentMethodFactories() instead")]
         public string DerivationStrategies
         {
             get;
             set;
         }
-
-        public DerivationStrategyBase GetDerivationStrategy(BTCPayNetwork network)
+        public IEnumerable<T> GetSupportedPaymentMethod<T>(PaymentMethodId paymentMethodId, BTCPayNetworkProvider networks) where T : ISupportedPaymentMethod
         {
-#pragma warning disable CS0618
-            if (!string.IsNullOrEmpty(DerivationStrategies))
-            {
-                JObject strategies = JObject.Parse(DerivationStrategies);
-#pragma warning restore CS0618
-                foreach (var strat in strategies.Properties())
-                {
-                    if (strat.Name == network.CryptoCode)
-                    {
-                        return BTCPayServer.DerivationStrategy.Parse(strat.Value.Value<string>(), network).DerivationStrategyBase;
-                    }
-                }
-            }
-#pragma warning disable CS0618
-            if (network.IsBTC && !string.IsNullOrEmpty(DerivationStrategy))
-            {
-                return BTCPayServer.DerivationStrategy.Parse(DerivationStrategy, network).DerivationStrategyBase;
-            }
-            return null;
-#pragma warning restore CS0618
+            return
+                GetSupportedPaymentMethod(networks)
+                .Where(p => paymentMethodId == null || p.PaymentId == paymentMethodId)
+                .OfType<T>();
         }
-
-        public IEnumerable<DerivationStrategy> GetDerivationStrategies(BTCPayNetworkProvider networks)
+        public IEnumerable<T> GetSupportedPaymentMethod<T>(BTCPayNetworkProvider networks) where T : ISupportedPaymentMethod
+        {
+            return GetSupportedPaymentMethod<T>(null, networks);
+        }
+        public IEnumerable<ISupportedPaymentMethod> GetSupportedPaymentMethod(BTCPayNetworkProvider networks)
         {
 #pragma warning disable CS0618
             bool btcReturned = false;
@@ -202,12 +188,13 @@ namespace BTCPayServer.Services.Invoices
                 JObject strategies = JObject.Parse(DerivationStrategies);
                 foreach (var strat in strategies.Properties())
                 {
-                    var network = networks.GetNetwork(strat.Name);
+                    var paymentMethodId = PaymentMethodId.Parse(strat.Name);
+                    var network = networks.GetNetwork(paymentMethodId.CryptoCode);
                     if (network != null)
                     {
-                        if (network == networks.BTC)
+                        if (network == networks.BTC && paymentMethodId.PaymentType == PaymentTypes.BTCLike)
                             btcReturned = true;
-                        yield return BTCPayServer.DerivationStrategy.Parse(strat.Value.Value<string>(), network);
+                        yield return PaymentMethodExtensions.Deserialize(paymentMethodId, strat.Value, network);
                     }
                 }
             }
@@ -222,15 +209,15 @@ namespace BTCPayServer.Services.Invoices
 #pragma warning restore CS0618
         }
 
-        internal void SetDerivationStrategies(IEnumerable<DerivationStrategy> derivationStrategies)
+        internal void SetSupportedPaymentMethods(IEnumerable<ISupportedPaymentMethod> derivationStrategies)
         {
             JObject obj = new JObject();
             foreach (var strat in derivationStrategies)
             {
-                obj.Add(strat.Network.CryptoCode, new JValue(strat.DerivationStrategyBase.ToString()));
+                obj.Add(strat.PaymentId.ToString(), PaymentMethodExtensions.Serialize(strat));
 #pragma warning disable CS0618
-                if (strat.Network.IsBTC)
-                    DerivationStrategy = strat.DerivationStrategyBase.ToString();
+                if (strat.PaymentId.IsBTCOnChain)
+                    DerivationStrategy = ((JValue)PaymentMethodExtensions.Serialize(strat)).Value<string>();
             }
             DerivationStrategies = JsonConvert.SerializeObject(obj);
 #pragma warning restore CS0618
@@ -378,13 +365,23 @@ namespace BTCPayServer.Services.Invoices
                 cryptoInfo.Url = ServerUrl.WithTrailingSlash() + $"invoice{cryptoSuffix}?id=" + Id;
 
 
-                cryptoInfo.PaymentUrls = new NBitpayClient.InvoicePaymentUrls()
+                if (info.GetId().PaymentType == PaymentTypes.BTCLike)
                 {
-                    BIP72 = $"{scheme}:{cryptoInfo.Address}?amount={cryptoInfo.Due}&r={ServerUrl.WithTrailingSlash() + ($"i/{Id}{cryptoSuffix}")}",
-                    BIP72b = $"{scheme}:?r={ServerUrl.WithTrailingSlash() + ($"i/{Id}{cryptoSuffix}")}",
-                    BIP73 = ServerUrl.WithTrailingSlash() + ($"i/{Id}{cryptoSuffix}"),
-                    BIP21 = $"{scheme}:{cryptoInfo.Address}?amount={cryptoInfo.Due}",
-                };
+                    cryptoInfo.PaymentUrls = new NBitpayClient.InvoicePaymentUrls()
+                    {
+                        BIP72 = $"{scheme}:{cryptoInfo.Address}?amount={cryptoInfo.Due}&r={ServerUrl.WithTrailingSlash() + ($"i/{Id}{cryptoSuffix}")}",
+                        BIP72b = $"{scheme}:?r={ServerUrl.WithTrailingSlash() + ($"i/{Id}{cryptoSuffix}")}",
+                        BIP73 = ServerUrl.WithTrailingSlash() + ($"i/{Id}{cryptoSuffix}"),
+                        BIP21 = $"{scheme}:{cryptoInfo.Address}?amount={cryptoInfo.Due}",
+                    };
+                }
+                if (info.GetId().PaymentType == PaymentTypes.LightningLike)
+                {
+                    cryptoInfo.PaymentUrls = new NBitpayClient.InvoicePaymentUrls()
+                    {
+                        BOLT11 = $"lightning:{cryptoInfo.Address}"
+                    };
+                }
 #pragma warning disable CS0618
                 if (info.CryptoCode == "BTC")
                 {
@@ -492,7 +489,7 @@ namespace BTCPayServer.Services.Invoices
                 obj.Add(new JProperty(v.GetId().ToString(), JObject.Parse(serializer.ToString(clone))));
             }
             PaymentMethod = obj;
-            foreach(var cryptoData in paymentMethods)
+            foreach (var cryptoData in paymentMethods)
             {
                 cryptoData.ParentEntity = this;
             }
@@ -529,6 +526,11 @@ namespace BTCPayServer.Services.Invoices
         /// <summary>
         /// Number of transactions required to pay
         /// </summary>
+        public int TxRequired { get; set; }
+
+        /// <summary>
+        /// Number of transactions using this payment method
+        /// </summary>
         public int TxCount { get; set; }
         /// <summary>
         /// Total amount of network fee to pay to the invoice
@@ -536,61 +538,6 @@ namespace BTCPayServer.Services.Invoices
         public Money NetworkFee { get; set; }
     }
 
-    public class PaymentMethodId
-    {
-        public PaymentMethodId(string cryptoCode, PaymentTypes paymentType)
-        {
-            if (cryptoCode == null)
-                throw new ArgumentNullException(nameof(cryptoCode));
-            PaymentType = paymentType;
-            CryptoCode = cryptoCode;
-        }
-        public string CryptoCode { get; private set; }
-        public PaymentTypes PaymentType { get; private set; }
-
-
-        public override bool Equals(object obj)
-        {
-            PaymentMethodId item = obj as PaymentMethodId;
-            if (item == null)
-                return false;
-            return ToString().Equals(item.ToString(), StringComparison.InvariantCulture);
-        }
-        public static bool operator ==(PaymentMethodId a, PaymentMethodId b)
-        {
-            if (System.Object.ReferenceEquals(a, b))
-                return true;
-            if (((object)a == null) || ((object)b == null))
-                return false;
-            return a.ToString() == b.ToString();
-        }
-
-        public static bool operator !=(PaymentMethodId a, PaymentMethodId b)
-        {
-            return !(a == b);
-        }
-
-        public override int GetHashCode()
-        {
-#pragma warning disable CA1307 // Specify StringComparison
-            return ToString().GetHashCode();
-#pragma warning restore CA1307 // Specify StringComparison
-        }
-
-        public override string ToString()
-        {
-            if (PaymentType == PaymentTypes.BTCLike)
-                return CryptoCode;
-            return CryptoCode + "_" + PaymentType.ToString();
-        }
-
-        public static PaymentMethodId Parse(string str)
-        {
-            var parts = str.Split('_');
-            return new PaymentMethodId(parts[0], parts.Length == 1 ? PaymentTypes.BTCLike : Enum.Parse<PaymentTypes>(parts[1]));
-        }
-    }
-
     public class PaymentMethod
     {
         [JsonIgnore]
@@ -635,31 +582,25 @@ namespace BTCPayServer.Services.Invoices
                 return new Payments.Bitcoin.BitcoinLikeOnChainPaymentMethod()
                 {
                     FeeRate = FeeRate,
-                    DepositAddress = string.IsNullOrEmpty(DepositAddress) ? null : BitcoinAddress.Create(DepositAddress, Network?.NBitcoinNetwork),
+                    DepositAddress = string.IsNullOrEmpty(DepositAddress) ? null : DepositAddress,
                     TxFee = TxFee
                 };
             }
             else
             {
-
-                if (GetId().PaymentType == PaymentTypes.BTCLike)
+                var details = PaymentMethodExtensions.DeserializePaymentMethodDetails(GetId(), PaymentMethodDetails);
+                if (details is Payments.Bitcoin.BitcoinLikeOnChainPaymentMethod btcLike)
                 {
-                    var method = DeserializePaymentMethodDetails<Payments.Bitcoin.BitcoinLikeOnChainPaymentMethod>(PaymentMethodDetails);
-                    method.TxFee = TxFee;
-                    method.DepositAddress = BitcoinAddress.Create(DepositAddress, Network?.NBitcoinNetwork);
-                    method.FeeRate = FeeRate;
-                    return method;
+                    btcLike.TxFee = TxFee;
+                    btcLike.DepositAddress = string.IsNullOrEmpty(DepositAddress) ? null : DepositAddress;
+                    btcLike.FeeRate = FeeRate;
                 }
+                return details;
             }
             throw new NotSupportedException(PaymentType);
 #pragma warning restore CS0618 // Type or member is obsolete
         }
 
-        private T DeserializePaymentMethodDetails<T>(JObject jobj) where T : class, IPaymentMethodDetails
-        {
-            return JsonConvert.DeserializeObject<T>(jobj.ToString());
-        }
-
         public PaymentMethod SetPaymentMethodDetails(IPaymentMethodDetails paymentMethod)
         {
 #pragma warning disable CS0618 // Type or member is obsolete
@@ -674,7 +615,7 @@ namespace BTCPayServer.Services.Invoices
             {
                 TxFee = bitcoinPaymentMethod.TxFee;
                 FeeRate = bitcoinPaymentMethod.FeeRate;
-                DepositAddress = bitcoinPaymentMethod.DepositAddress.ToString();
+                DepositAddress = bitcoinPaymentMethod.DepositAddress;
             }
             var jobj = JObject.Parse(JsonConvert.SerializeObject(paymentMethod));
             PaymentMethodDetails = jobj;
@@ -705,42 +646,45 @@ namespace BTCPayServer.Services.Invoices
             var paid = 0m;
             var cryptoPaid = 0.0m;
 
+            int precision = 8;
             var paidTxFee = 0m;
-            bool paidEnough = paid >= RoundUp(totalDue, 8);
-            int txCount = 0;
+            bool paidEnough = paid >= Extensions.RoundUp(totalDue, precision);
+            int txRequired = 0;
             var payments =
                 ParentEntity.GetPayments()
                 .Where(p => p.Accounted && paymentPredicate(p))
                 .OrderBy(p => p.ReceivedTime)
                 .Select(_ =>
                 {
-                    var txFee = _.GetValue(paymentMethods, GetId(), paymentMethods[_.GetpaymentMethodId()].GetTxFee());
+                    var txFee = _.GetValue(paymentMethods, GetId(), paymentMethods[_.GetPaymentMethodId()].GetTxFee());
                     paid += _.GetValue(paymentMethods, GetId());
                     if (!paidEnough)
                     {
                         totalDue += txFee;
                         paidTxFee += txFee;
                     }
-                    paidEnough |= paid >= RoundUp(totalDue, 8);
-                    if (GetId() == _.GetpaymentMethodId())
+                    paidEnough |= paid >= Extensions.RoundUp(totalDue, precision);
+                    if (GetId() == _.GetPaymentMethodId())
                     {
                         cryptoPaid += _.GetCryptoPaymentData().GetValue();
-                        txCount++;
+                        txRequired++;
                     }
                     return _;
                 })
                 .ToArray();
 
+            var accounting = new PaymentMethodAccounting();
+            accounting.TxCount = txRequired;
             if (!paidEnough)
             {
-                txCount++;
+                txRequired++;
                 totalDue += GetTxFee();
                 paidTxFee += GetTxFee();
             }
-            var accounting = new PaymentMethodAccounting();
-            accounting.TotalDue = Money.Coins(RoundUp(totalDue, 8));
+
+            accounting.TotalDue = Money.Coins(Extensions.RoundUp(totalDue, precision));
             accounting.Paid = Money.Coins(paid);
-            accounting.TxCount = txCount;
+            accounting.TxRequired = txRequired;
             accounting.CryptoPaid = Money.Coins(cryptoPaid);
             accounting.Due = Money.Max(accounting.TotalDue - accounting.Paid, Money.Zero);
             accounting.DueUncapped = accounting.TotalDue - accounting.Paid;
@@ -748,20 +692,6 @@ namespace BTCPayServer.Services.Invoices
             return accounting;
         }
 
-        private static decimal RoundUp(decimal value, int precision)
-        {
-            for (int i = 0; i < precision; i++)
-            {
-                value = value * 10m;
-            }
-            value = Math.Ceiling(value);
-            for (int i = 0; i < precision; i++)
-            {
-                value = value / 10m;
-            }
-            return value;
-        }
-
         private decimal GetTxFee()
         {
             var method = GetPaymentMethodDetails();
@@ -823,7 +753,7 @@ namespace BTCPayServer.Services.Invoices
                 paymentData.Legacy = true;
                 return paymentData;
             }
-            if (GetpaymentMethodId().PaymentType == PaymentTypes.BTCLike)
+            if (GetPaymentMethodId().PaymentType == PaymentTypes.BTCLike)
             {
                 var paymentData = JsonConvert.DeserializeObject<Payments.Bitcoin.BitcoinLikePaymentData>(CryptoPaymentData);
                 // legacy
@@ -831,6 +761,10 @@ namespace BTCPayServer.Services.Invoices
                 paymentData.Outpoint = Outpoint;
                 return paymentData;
             }
+            if(GetPaymentMethodId().PaymentType== PaymentTypes.LightningLike)
+            {
+                return JsonConvert.DeserializeObject<Payments.Lightning.LightningLikePaymentData>(CryptoPaymentData);
+            }
 
             throw new NotSupportedException(nameof(CryptoPaymentDataType) + " does not support " + CryptoPaymentDataType);
 #pragma warning restore CS0618
@@ -846,20 +780,16 @@ namespace BTCPayServer.Services.Invoices
                 Output = paymentData.Output;
                 ///
             }
-            else
-                throw new NotSupportedException(cryptoPaymentData.ToString());
-            CryptoPaymentDataType = paymentData.GetPaymentType().ToString();
+            CryptoPaymentDataType = cryptoPaymentData.GetPaymentType().ToString();
             CryptoPaymentData = JsonConvert.SerializeObject(cryptoPaymentData);
 #pragma warning restore CS0618
             return this;
         }
         internal decimal GetValue(PaymentMethodDictionary paymentMethods, PaymentMethodId paymentMethodId, decimal? value = null)
         {
-#pragma warning disable CS0618
-            value = value ?? Output.Value.ToDecimal(MoneyUnit.BTC);
-#pragma warning restore CS0618
+            value = value ?? this.GetCryptoPaymentData().GetValue();
             var to = paymentMethodId;
-            var from = this.GetpaymentMethodId();
+            var from = this.GetPaymentMethodId();
             if (to == from)
                 return decimal.Round(value.Value, 8);
             var fromRate = paymentMethods[from].Rate;
@@ -870,7 +800,7 @@ namespace BTCPayServer.Services.Invoices
             return otherCurrencyValue;
         }
 
-        public PaymentMethodId GetpaymentMethodId()
+        public PaymentMethodId GetPaymentMethodId()
         {
 #pragma warning disable CS0618 // Type or member is obsolete
             return new PaymentMethodId(CryptoCode ?? "BTC", string.IsNullOrEmpty(CryptoPaymentDataType) ? PaymentTypes.BTCLike : Enum.Parse<PaymentTypes>(CryptoPaymentDataType));
@@ -906,5 +836,6 @@ namespace BTCPayServer.Services.Invoices
         bool PaymentCompleted(PaymentEntity entity, BTCPayNetwork network);
         bool PaymentConfirmed(PaymentEntity entity, SpeedPolicy speedPolicy, BTCPayNetwork network);
 
+        PaymentTypes GetPaymentType();
     }
 }

BTCPayServer/Services/Invoices/InvoiceRepository.cs

@@ -130,7 +130,7 @@ namespace BTCPayServer.Services.Invoices
                         throw new InvalidOperationException("CryptoCode unsupported");
                     var paymentDestination = paymentMethod.GetPaymentMethodDetails().GetPaymentDestination();
 
-                    string address = GetDestination(paymentMethod);
+                    string address = GetDestination(paymentMethod, paymentMethod.Network.NBitcoinNetwork);
                     context.AddressInvoices.Add(new AddressInvoiceData()
                     {
                         InvoiceDataId = invoice.Id,
@@ -162,12 +162,12 @@ namespace BTCPayServer.Services.Invoices
             return invoice;
         }
 
-        private static string GetDestination(PaymentMethod paymentMethod)
+        private static string GetDestination(PaymentMethod paymentMethod, Network network)
         {
             // For legacy reason, BitcoinLikeOnChain is putting the hashes of addresses in database
             if (paymentMethod.GetId().PaymentType == Payments.PaymentTypes.BTCLike)
             {
-                return ((Payments.Bitcoin.BitcoinLikeOnChainPaymentMethod)paymentMethod.GetPaymentMethodDetails()).DepositAddress.ScriptPubKey.Hash.ToString();
+                return ((Payments.Bitcoin.BitcoinLikeOnChainPaymentMethod)paymentMethod.GetPaymentMethodDetails()).GetDepositAddress(network).ScriptPubKey.Hash.ToString();
             }
             ///////////////
             return paymentMethod.GetPaymentMethodDetails().GetPaymentDestination();
@@ -209,7 +209,7 @@ namespace BTCPayServer.Services.Invoices
                     InvoiceDataId = invoiceId,
                     CreatedTime = DateTimeOffset.UtcNow
                 }
-                .Set(GetDestination(currencyData), currencyData.GetId()));
+                .Set(GetDestination(currencyData, network.NBitcoinNetwork), currencyData.GetId()));
                 context.HistoricalAddressInvoices.Add(new HistoricalAddressInvoiceData()
                 {
                     InvoiceDataId = invoiceId,
@@ -363,7 +363,7 @@ namespace BTCPayServer.Services.Invoices
             {
                 entity.AvailableAddressHashes = invoice.AddressInvoices.Select(a => a.GetAddress() + a.GetpaymentMethodId().ToString()).ToHashSet();
             }
-            if(invoice.Events != null)
+            if (invoice.Events != null)
             {
                 entity.Events = invoice.Events.OrderBy(c => c.Timestamp).ToList();
             }
@@ -461,7 +461,16 @@ namespace BTCPayServer.Services.Invoices
             AddToTextSearch(invoiceId, addresses.Select(a => a.ToString()).ToArray());
         }
 
-        public async Task<PaymentEntity> AddPayment(string invoiceId, DateTimeOffset date, CryptoPaymentData paymentData, string cryptoCode)
+        /// <summary>
+        /// Add a payment to an invoice
+        /// </summary>
+        /// <param name="invoiceId"></param>
+        /// <param name="date"></param>
+        /// <param name="paymentData"></param>
+        /// <param name="cryptoCode"></param>
+        /// <param name="accounted"></param>
+        /// <returns>The PaymentEntity or null if already added</returns>
+        public async Task<PaymentEntity> AddPayment(string invoiceId, DateTimeOffset date, CryptoPaymentData paymentData, string cryptoCode, bool accounted = false)
         {
             using (var context = _ContextFactory.CreateContext())
             {
@@ -471,22 +480,26 @@ namespace BTCPayServer.Services.Invoices
                     CryptoCode = cryptoCode,
 #pragma warning restore CS0618
                     ReceivedTime = date.UtcDateTime,
-                    Accounted = false
+                    Accounted = accounted
                 };
                 entity.SetCryptoPaymentData(paymentData);
-                
+
 
                 PaymentData data = new PaymentData
                 {
                     Id = paymentData.GetPaymentId(),
                     Blob = ToBytes(entity, null),
                     InvoiceDataId = invoiceId,
-                    Accounted = false
+                    Accounted = accounted
                 };
 
                 context.Payments.Add(data);
 
-                await context.SaveChangesAsync().ConfigureAwait(false);
+                try
+                {
+                    await context.SaveChangesAsync().ConfigureAwait(false);
+                }
+                catch(DbUpdateException) { return null; } // Already exists
                 AddToTextSearch(invoiceId, paymentData.GetSearchTerms());
                 return entity;
             }

BTCPayServer/Services/Wallets/BTCPayWallet.cs

@@ -126,17 +126,18 @@ namespace BTCPayServer.Services.Wallets
                     }
                     catch
                     {
-                        Logs.PayServer.LogError("Call to NBXplorer GetUTXOsAsync timed out, this should never happen, please report this issue to NBXplorer developers");
+                        Logs.PayServer.LogError($"{Network.CryptoCode}: Call to NBXplorer GetUTXOsAsync timed out, this should never happen, please report this issue to NBXplorer developers");
                         throw;
                     }
                     var spentTime = DateTimeOffset.UtcNow - now;
                     if (spentTime.TotalSeconds > 30)
                     {
-                        Logs.PayServer.LogWarning($"NBXplorer took {(int)spentTime.TotalSeconds} seconds to reply, there is something wrong, please report this issue to NBXplorer developers");
+                        Logs.PayServer.LogWarning($"{Network.CryptoCode}: NBXplorer took {(int)spentTime.TotalSeconds} seconds to reply, there is something wrong, please report this issue to NBXplorer developers");
                     }
                     entry.AbsoluteExpiration = DateTimeOffset.UtcNow + CacheSpan;
                     return result;
                 });
+                _FetchingUTXOs.TryRemove(strategy.ToString(), out var unused);
                 completionSource.TrySetResult(utxos);
             }
             catch (Exception ex)

BTCPayServer/Views/Invoice/Checkout.cshtml

@@ -1,4 +1,5 @@
-@model PaymentModel
+@addTagHelper *, Meziantou.AspNetCore.BundleTagHelpers
+@model PaymentModel
 @{
     Layout = null;
     ViewData["Title"] = "Payment";
@@ -7,28 +8,18 @@
 <html>
 <head>
     <meta http-equiv="content-type" content="text/html; charset=UTF-8">
-    <!-- base href="/" -->
+
     <meta charset="utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
     <title>BTCPay Invoice</title>
 
-    <link href="~/vendor/font-awesome/css/font-awesome.css" rel="stylesheet" />
-    <link href="~/css/css.css" rel="stylesheet" type="text/css">
-    <link href="~/css/normalizer.css" rel="stylesheet" type="text/css">
-    <script src="https://code.jquery.com/jquery-3.2.1.min.js"
-            crossorigin="anonymous"></script>
+    <bundle name="wwwroot/bundles/checkout-bundle.min.css" />
+
     <script type="text/javascript">
 		@Model.ToJSVariableModel("srvModel")
     </script>
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/1.7.1/clipboard.min.js"></script>
-    <script src="~/js/vue.min.js" type="text/javascript" defer="defer"></script>
-    <script src="~/js/vue-qrcode.js" type="text/javascript" defer="defer"></script>
-    <script src="~/js/core.js" type="text/javascript" defer="defer"></script>
-    <!-- <script src="img/Intl.js" type="text/javascript" defer="defer"></script>
-    <script src="img/en-US.js" type="text/javascript" defer="defer"></script>
-    <script src="img/polyfills.js" type="text/javascript" defer="defer"></script>
-    <script src="img/vendor.js" type="text/javascript" defer="defer"></script>
-    <script src="img/main-en-US.js" defer="defer"></script> -->
+
+    <bundle name="wwwroot/bundles/checkout-bundle.min.js" />
 </head>
 <body style="background: #E4E4E4">
     <noscript>
@@ -77,7 +68,7 @@
                                             <bp-spinner>
                                                 <svg xml:space="preserve" style="enable-background:new 0 0 50 50;" version="1.1" viewBox="0 0 50 50" x="0px" xmlns="http://www.w3.org/2000/svg" y="0px">
                                                 <path d="M11.1,29.6c-0.5-1.5-0.8-3-0.8-4.6c0-8.1,6.6-14.7,14.7-14.7S39.7,16.9,39.7,25c0,1.6-0.3,3.2-0.8,4.6l6.1,2c0.7-2.1,1.1-4.3,1.1-6.6c0-11.7-9.5-21.2-21.2-21.2S3.8,13.3,3.8,25c0,2.3,0.4,4.5,1.1,6.6L11.1,29.6z"></path>
-                        </svg>
+                                                </svg>
                                             </bp-spinner>
                                         </div>
                                         <div class="timer-row__message">
@@ -93,6 +84,33 @@
                                     </div>
                                 </div>
                                 <div class="order-details">
+                                    @if (Model.AvailableCryptos.Count > 1)
+                                    {
+                                        <div class="currency-selection">
+                                            <div class="single-item-order__left">
+                                                <div style="font-weight: 600;">
+                                                    Pay with
+                                                </div>
+                                            </div>
+                                            <div class="single-item-order__right">
+                                                <div class="payment__currencies">
+                                                    @foreach (var crypto in Model.AvailableCryptos)
+                                                    {
+                                                        <a href="@crypto.Link" onclick="return changeCurrency('@crypto.PaymentMethodId');">
+                                                            <img style="height:32px; margin-left:5px;" alt="@crypto.PaymentMethodId" src="@crypto.CryptoImage" />
+                                                        </a>
+                                                    }
+                                                </div>
+                                                <div class="payment__spinner">
+                                                    <bp-spinner>
+                                                        <svg xml:space="preserve" style="enable-background:new 0 0 50 50;" version="1.1" viewBox="0 0 50 50" x="0px" xmlns="http://www.w3.org/2000/svg" y="0px">
+                                                        <path d="M11.1,29.6c-0.5-1.5-0.8-3-0.8-4.6c0-8.1,6.6-14.7,14.7-14.7S39.7,16.9,39.7,25c0,1.6-0.3,3.2-0.8,4.6l6.1,2c0.7-2.1,1.1-4.3,1.1-6.6c0-11.7-9.5-21.2-21.2-21.2S3.8,13.3,3.8,25c0,2.3,0.4,4.5,1.1,6.6L11.1,29.6z"></path>
+                                                </svg>
+                                                    </bp-spinner>
+                                                </div>
+                                            </div>
+                                        </div>
+                                    }
                                     <!---->
                                     <div class="single-item-order buyerTotalLine">
                                         <div class="single-item-order__left">
@@ -158,8 +176,9 @@
                                 <div adjust-height="" class="payment-box">
                                     <div class="bp-view payment scan" id="scan">
                                         <div class="payment__scan">
-                                            <img :src="srvModel.cryptoImage" style="position: absolute; height:64px; width:64px; left:118px; top:96px;" />
-                                            <qrcode :val="srvModel.invoiceBitcoinUrl" :size="256" bg-color="#f5f5f7" fg-color="#000" />
+                                            <img v-bind:src="srvModel.cryptoImage" style="position: absolute; height:64px; width:64px; left:118px; top:96px;" />
+                                            <qrcode v-bind:val="srvModel.invoiceBitcoinUrlQR" v-bind:size="256" bg-color="#f5f5f7" fg-color="#000">
+                                            </qrcode>
                                         </div>
                                         <div class="payment__details__instruction__open-wallet">
                                             <a class="payment__details__instruction__open-wallet__btn action-button" v-bind:href="srvModel.invoiceBitcoinUrl">
@@ -361,9 +380,9 @@
                                                         <div class="manual-box__address__value copy-cursor" ngxclipboard="">
                                                             <div class="manual-box__address__wrapper">
                                                                 <div class="manual-box__address__wrapper__logo">
-                                                                    <img :src="srvModel.cryptoImage" />
+                                                                    <img :src="srvModel.cryptoImage" height="16" />
                                                                 </div>
-                                                                <div class="manual-box__address__wrapper__value">{{srvModel.btcAddress}}</div>
+                                                                <div class="manual-box__address__wrapper__value" style="overflow:hidden;max-width:240px;">{{srvModel.btcAddress}}</div>
                                                             </div>
                                                             <div class="copied-label" style="top: 5px;">
                                                                 <span i18n="">Copied</span>
@@ -605,23 +624,27 @@
                             </div>
                         </div>
                     </div>
-                    <div class="footer">
-                        <div class="footer__item no-hover" style="opacity: 1; padding-left: 0; max-height: 21px;">
-                            @if(Model.AvailableCryptos.Count > 1)
-                            {
-                                <div style="text-align:center">Accepted here</div>
-                                <div style="text-align:center">
-                                    @foreach(var crypto in Model.AvailableCryptos)
-                                    {
-                                        <a style="text-decoration:none;" href="@crypto.Link" onclick="srvModel.paymentMethodId='@crypto.PaymentMethodId'; fetchStatus(); return false;"><img style="height:32px; margin-right:5px; margin-left:5px;" alt="@crypto.PaymentMethodId" src="@crypto.CryptoImage" /></a>
-                                    }
-                                </div>
-                            }
-                        </div>
-                    </div>
                 </div>
             </div>
         </div>
     </invoice>
+    <script type="text/javascript">
+        // TODO: Move all logic from core.js to Vue controller
+        Vue.config.ignoredElements = [
+            'line-items',
+            'low-fee-timeline',
+            // Ignoring custom HTML5 elements, eg: bp-spinner
+            /^bp-/
+        ];
+        var checkoutCtrl = new Vue({
+            el: '#checkoutCtrl',
+            components: {
+                qrcode: VueQr
+            },
+            data: {
+                srvModel: srvModel
+            }
+        });
+    </script>
 </body>
 </html>

BTCPayServer/Views/Invoice/Invoice.cshtml

@@ -10,6 +10,9 @@
         text-overflow: ellipsis;
         white-space: nowrap;
     }
+    .money {
+        text-align: right;
+    }
 </style>
 
 <section>
@@ -67,7 +70,7 @@
                     </tr>
                     <tr>
                         <th>Refund email</th>
-                        <td>@Model.RefundEmail</td>
+                        <td><a href="mailto:@Model.RefundEmail">@Model.RefundEmail</a></td>
                     </tr>
                     <tr>
                         <th>Order Id</th>
@@ -83,7 +86,7 @@
                     </tr>
                     <tr>
                         <th>Redirect Url</th>
-                        <td>@Model.RedirectUrl</td>
+                        <td><a href="@Model.RedirectUrl">@Model.RedirectUrl</a></td>
                     </tr>
                 </table>
             </div>
@@ -98,7 +101,7 @@
                     </tr>
                     <tr>
                         <th>Email</th>
-                        <td>@Model.BuyerInformation.BuyerEmail</td>
+                        <td><a href="mailto:@Model.BuyerInformation.BuyerEmail">@Model.BuyerInformation.BuyerEmail</a></td>
                     </tr>
                     <tr>
                         <th>Phone</th>
@@ -153,22 +156,22 @@
                 <table class="table">
                     <thead class="thead-inverse">
                         <tr>
-                            <th>Crypto</th>
-                            <th>Rate</th>
-                            <th>Paid</th>
-                            <th>Due</th>
+                            <th style="white-space:nowrap;">Payment method</th>
                             <th>Address</th>
+                            <th class="money">Rate</th>
+                            <th class="money">Paid</th>
+                            <th class="money">Due</th>
                         </tr>
                     </thead>
                     <tbody>
                         @foreach(var payment in Model.CryptoPayments)
                     {
                         <tr>
-                            <td>@payment.CryptoCode</td>
-                            <td>@payment.Rate</td>
-                            <td>@payment.Paid</td>
-                            <td>@payment.Due</td>
+                            <td>@payment.PaymentMethod</td>
                             <td>@payment.Address</td>
+                            <td class="money">@payment.Rate</td>
+                            <td class="money">@payment.Paid</td>
+                            <td class="money">@payment.Due</td>
                         </tr>
                 }
                     </tbody>
@@ -181,24 +184,21 @@
                 <table class="table">
                     <thead class="thead-inverse">
                         <tr>
-                            <th>Crypto</th>
-                            <th>Date</th>
+                            <th style="white-space:nowrap;">Payment method</th>
                             <th>Deposit address</th>
                             <th>Transaction Id</th>
-                            <th>Confirmations</th>
-                            <th>Replaced</th>
+                            <th style="text-align:right;">Confirmations</th>
                         </tr>
                     </thead>
                     <tbody>
                         @foreach(var payment in Model.Payments)
                     {
+                            var replaced = payment.Replaced ? "text-decoration: line-through;" : "";
                         <tr>
-                            <td>@payment.CryptoCode</td>
-                            <td>@payment.ReceivedTime</td>
-                            <td>@payment.DepositAddress</td>
-                            <td><a href="@payment.TransactionLink" target="_blank">@payment.TransactionId</a></td>
-                            <td>@payment.Confirmations</td>
-                            <td>@payment.Replaced</td>
+                            <td style="@replaced">@payment.PaymentMethod</td>
+                            <td style="@replaced">@payment.DepositAddress</td>
+                            <td style="@replaced"><a href="@payment.TransactionLink" target="_blank">@payment.TransactionId</a></td>
+                            <td style="text-align:right;">@payment.Confirmations</td>
                         </tr>
                 }
                     </tbody>
@@ -211,20 +211,19 @@
                 <table class="table">
                     <thead class="thead-inverse">
                         <tr>
-                            <th>Crypto</th>
+                            <th style="white-space:nowrap;">Payment method</th>
                             <th>Address</th>
-                            <th>Current</th>
                         </tr>
                     </thead>
                     <tbody>
                         @foreach(var address in Model.Addresses)
-                    {
+                        {
+                            var current = address.Current ? "font-weight: bold;" : "";
                         <tr>
-                            <td>@address.GetCryptoCode()</td>
-                            <td>@address.GetAddress()</td>
-                            <td>@(!address.UnAssigned.HasValue)</td>
+                            <td style="width:100px;@current">@address.PaymentMethod</td>
+                            <td style="max-width:100px;overflow:hidden;@current">@address.Destination</td>
                         </tr>
-                }
+                    }
                     </tbody>
                 </table>
             </div>

BTCPayServer/Views/Invoice/ListInvoices.cshtml

@@ -44,10 +44,11 @@
                 <thead class="thead-inverse">
                     <tr>
                         <th>Date</th>
+                        <th>OrderId</th>
                         <th>InvoiceId</th>
                         <th>Status</th>
-                        <th>Amount</th>
-                        <th>Actions</th>
+                        <th style="text-align:right">Amount</th>
+                        <th style="text-align:right">Actions</th>
                     </tr>
                 </thead>
                 <tbody>
@@ -55,6 +56,16 @@
                     {
                         <tr>
                             <td>@invoice.Date</td>
+                            <td>
+                                @if(invoice.RedirectUrl != string.Empty)
+                                {
+                                    <a href="@invoice.RedirectUrl">@invoice.OrderId</a>
+                                }
+                                else
+                                {
+                                    <span>@invoice.OrderId</span>
+                                }
+                            </td>
                             <td>@invoice.InvoiceId</td>
                             @if(invoice.Status == "paid")
                             {
@@ -71,10 +82,15 @@
                             }
                             else
                             {
-                                <td>@invoice.Status</td>
+                                <td >@invoice.Status</td>
                             }
-                            <td>@invoice.AmountCurrency</td>
-                            <td><a asp-action="Checkout" asp-route-invoiceId="@invoice.InvoiceId">Checkout</a> - <a asp-action="Invoice" asp-route-invoiceId="@invoice.InvoiceId">Details</a></td>
+                            <td style="text-align:right">@invoice.AmountCurrency</td>
+                            <td style="text-align:right">
+                                @if(invoice.Status == "new")
+                                {
+                                    <a asp-action="Checkout" asp-route-invoiceId="@invoice.InvoiceId">Checkout</a> <span>-</span> 
+                                }<a asp-action="Invoice" asp-route-invoiceId="@invoice.InvoiceId">Details</a>
+                            </td>
                         </tr>
                     }
                 </tbody>

BTCPayServer/Views/Shared/SyncModal.cshtml

@@ -77,7 +77,7 @@
 
 </div>
 
-<link href="~/vendor/animatecss/animate.css" rel="stylesheet" />
+@*<link href="~/vendor/animatecss/animate.css" rel="stylesheet" />*@
 <script type="text/javascript">
     function dismissSyncModal() {
         $("#modalDialog").addClass('animated bounceOutRight')

BTCPayServer/Views/Shared/_Layout.cshtml

@@ -3,12 +3,12 @@
 @inject RoleManager<IdentityRole> RoleManager
 @inject BTCPayServer.Services.BTCPayServerEnvironment env
 @inject BTCPayServer.HostedServices.NBXplorerDashboard dashboard
+@addTagHelper *, Meziantou.AspNetCore.BundleTagHelpers
 
 <!DOCTYPE html>
 <html lang="en">
 
 <head>
-
     <meta charset="utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
     <meta name="description" content="">
@@ -16,23 +16,11 @@
 
     <title>BTCPay Server</title>
 
-    <!-- Bootstrap core CSS -->
-    <link href="~/vendor/bootstrap/css/bootstrap.css" rel="stylesheet">
-
-    <!-- Custom fonts for this template -->
-    @*<link href="~/vendor/font-awesome/css/font-awesome.css" rel="stylesheet" type="text/css">
-        <link href='https://fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800' rel='stylesheet' type='text/css'>
-        <link href='https://fonts.googleapis.com/css?family=Merriweather:400,300,300italic,400italic,700,700italic,900,900italic' rel='stylesheet' type='text/css'>*@
-
-    <!-- Plugin CSS -->
-    <link href="~/vendor/magnific-popup/magnific-popup.css" rel="stylesheet">
-
-    <!-- Custom styles for this template -->
-    <link href="~/css/creative.css" rel="stylesheet" />
-
-    <!-- Custom styles for this template -->
-    <link href="~/css/site.css" rel="stylesheet" />
+    @* CSS *@
+    <bundle name="wwwroot/bundles/main-bundle.min.css" />
 
+    @* JS *@
+    <bundle name="wwwroot/bundles/main-bundle.min.js" />
 </head>
 
 <body id="page-top">
@@ -50,9 +38,9 @@
         <div class="container">
             <a class="navbar-brand js-scroll-trigger" href="~/">
                 <img src="~/img/logo.png" height="45">
-                @if(env.ChainType != NBXplorer.ChainType.Main)
+                @if (env.ChainType != NBXplorer.ChainType.Main)
                 {
-                <span class="badge badge-warning" style="font-size:10px;">@env.ChainType.ToString()</span>
+                    <span class="badge badge-warning" style="font-size:10px;">@env.ChainType.ToString()</span>
                 }
             </a>
             <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarResponsive" aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation">
@@ -60,24 +48,24 @@
             </button>
             <div class="collapse navbar-collapse" id="navbarResponsive">
                 <ul class="navbar-nav ml-auto">
-                    @if(SignInManager.IsSignedIn(User))
-            {
-                @if(User.IsInRole(Roles.ServerAdmin))
-        {
-            <li class="nav-item"><a asp-area="" asp-controller="Server" asp-action="ListUsers" class="nav-link js-scroll-trigger">Server settings</a></li>
-}
-                <li class="nav-item"><a asp-area="" asp-controller="Stores" asp-action="ListStores" class="nav-link js-scroll-trigger">Stores</a></li>
-                <li class="nav-item"><a asp-area="" asp-controller="Invoice" asp-action="ListInvoices" class="nav-link js-scroll-trigger">Invoices</a></li>
-                <li class="nav-item">
-                    <a asp-area="" asp-controller="Manage" asp-action="Index" title="Manage" class="nav-link js-scroll-trigger">My settings</a>
-                </li>
-                <li class="nav-item">
-                    <a asp-area="" asp-controller="Account" asp- asp-action="Logout" title="Manage" class="nav-link js-scroll-trigger">Log out</a>
-                </li>}
-    else
-    {
-        <li class="nav-item"><a asp-area="" asp-controller="Account" asp-action="Register" class="nav-link js-scroll-trigger">Register</a></li>
-        <li class="nav-item"><a asp-area="" asp-controller="Account" asp-action="Login" class="nav-link js-scroll-trigger">Log in</a></li>}
+                    @if (SignInManager.IsSignedIn(User))
+                    {
+                        @if (User.IsInRole(Roles.ServerAdmin))
+                        {
+                            <li class="nav-item"><a asp-area="" asp-controller="Server" asp-action="ListUsers" class="nav-link js-scroll-trigger">Server settings</a></li>
+                        }
+                        <li class="nav-item"><a asp-area="" asp-controller="Stores" asp-action="ListStores" class="nav-link js-scroll-trigger">Stores</a></li>
+                        <li class="nav-item"><a asp-area="" asp-controller="Invoice" asp-action="ListInvoices" class="nav-link js-scroll-trigger">Invoices</a></li>
+                        <li class="nav-item">
+                            <a asp-area="" asp-controller="Manage" asp-action="Index" title="Manage" class="nav-link js-scroll-trigger">My settings</a>
+                        </li>
+                        <li class="nav-item">
+                            <a asp-area="" asp-controller="Account" asp- asp-action="Logout" title="Manage" class="nav-link js-scroll-trigger">Log out</a>
+                        </li>}
+                    else
+                    {
+                        <li class="nav-item"><a asp-area="" asp-controller="Account" asp-action="Register" class="nav-link js-scroll-trigger">Register</a></li>
+                        <li class="nav-item"><a asp-area="" asp-controller="Account" asp-action="Login" class="nav-link js-scroll-trigger">Log in</a></li>}
 
                 </ul>
             </div>
@@ -90,20 +78,6 @@
         <div class="container text-right"><span style="font-size:8px;">@env.ToString()</span></div>
     </footer>
 
-    <!-- Bootstrap core JavaScript -->
-    <script src="~/vendor/jquery/jquery.min.js"></script>
-    <script src="~/vendor/popper/popper.min.js"></script>
-    <script src="~/vendor/bootstrap/js/bootstrap.min.js"></script>
-
-    <!-- Plugin JavaScript -->
-    <script src="~/vendor/jquery-easing/jquery.easing.min.js"></script>
-    <script src="~/vendor/scrollreveal/scrollreveal.min.js"></script>
-    <script src="~/vendor/magnific-popup/jquery.magnific-popup.min.js"></script>
-
-    <!-- Custom scripts for this template -->
-    <script src="~/js/creative.js"></script>
-
-
     @if (!dashboard.IsFullySynched())
     {
         @Html.Partial("SyncModal")

BTCPayServer/Views/Shared/_ValidationScriptsPartial.cshtml

@@ -1,18 +1,3 @@
-<environment include="Development">
-    <script src="~/lib/jquery-validation/dist/jquery.validate.js"></script>
-    <script src="~/lib/jquery-validation-unobtrusive/jquery.validate.unobtrusive.js"></script>
-</environment>
-<environment exclude="Development">
-    <script src="https://ajax.aspnetcdn.com/ajax/jquery.validate/1.14.0/jquery.validate.min.js"
-            asp-fallback-src="~/lib/jquery-validation/dist/jquery.validate.min.js"
-            asp-fallback-test="window.jQuery && window.jQuery.validator"
-            crossorigin="anonymous"
-            integrity="sha384-Fnqn3nxp3506LP/7Y3j/25BlWeA3PXTyT1l78LjECcPaKCV12TsZP7yyMxOe/G/k">
-    </script>
-    <script src="https://ajax.aspnetcdn.com/ajax/jquery.validation.unobtrusive/3.2.6/jquery.validate.unobtrusive.min.js"
-            asp-fallback-src="~/lib/jquery-validation-unobtrusive/jquery.validate.unobtrusive.min.js"
-            asp-fallback-test="window.jQuery && window.jQuery.validator && window.jQuery.validator.unobtrusive"
-            crossorigin="anonymous"
-            integrity="sha384-JrXK+k53HACyavUKOsL+NkmSesD2P+73eDMrbTtTk0h4RmOF8hF8apPlkp26JlyH">
-    </script>
-</environment>
+@addTagHelper *, Meziantou.AspNetCore.BundleTagHelpers
+
+<bundle name="wwwroot/bundles/jqueryvalidate-bundle.min.js" />

BTCPayServer/Views/Stores/AddLightningNode.cshtml

@@ -0,0 +1,62 @@
+@model LightningNodeViewModel
+@{
+    Layout = "../Shared/_NavLayout.cshtml";
+    ViewData["Title"] = "Add lightning node (Experimental)";
+    ViewData.AddActivePage(BTCPayServer.Views.Stores.StoreNavPages.Index);
+}
+
+<h4>@ViewData["Title"]</h4>
+@Html.Partial("_StatusMessage", Model.StatusMessage)
+<div class="row">
+    <div class="col-md-6">
+        <div asp-validation-summary="All" class="text-danger"></div>
+    </div>
+</div>
+
+<div class="alert alert-warning alert-dismissible" role="alert">
+    <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
+    <p>
+        <span>A connection to a lightning charge node is required to generate lignting network enabled invoices. <br /></span>
+        <span>This is experimental and not advised for production so keep in mind:</span>
+    </p>
+    <ul>
+        <li>You might lose your money</li>
+        <li>The devs of BTCPay Server don't know what they are doing and won't be able to help you if shit hit the fan</li>
+        <li>You approve being #reckless and being the sole responsible party for your loss</li>
+        <li>BTCPay Server relies on a <a href="https://github.com/ElementsProject/lightning-charge">Lightning Charge</a> node</li>
+        <li>If you have no idea what above mean, search by yourself</li>
+        <li>If you still have no idea how to use lightning, give up for now, we'll make it easier later</li>
+    </ul>
+</div>
+<div class="row">
+    <div class="col-md-8">
+        <form method="post">
+            <div class="form-group">
+                <h5>Lightning node url</h5>
+                <span>This URL should point to an installed lightning charge server</span>
+            </div>
+            <div class="form-group">
+                <label asp-for="CryptoCurrency"></label>
+                <select asp-for="CryptoCurrency" asp-items="Model.CryptoCurrencies" class="form-control"></select>
+            </div>
+
+            <div class="form-group">
+                <label asp-for="Url"></label>
+                <input id="lightningurl" asp-for="Url" class="form-control" />
+                <span asp-validation-for="Url" class="text-danger"></span>
+                @if(Model.InternalLightningNode != null)
+                {
+                    <p class="form-text text-muted">
+                        You can use the internal lightning node by <a href="#" onclick="$('#lightningurl').val('@Model.InternalLightningNode'); return false;">clicking here</a>
+                    </p>
+                }
+            </div>
+            <button name="command" type="submit" value="save" class="btn btn-success">Submit</button>
+            <button name="command" type="submit" value="test" class="btn btn-info">Test connection</button>
+        </form>
+    </div>
+</div>
+
+@section Scripts {
+    @await Html.PartialAsync("_ValidationScriptsPartial")
+}

BTCPayServer/Views/Stores/UpdateStore.cshtml

@@ -14,7 +14,7 @@
     </div>
 </div>
 <div class="row">
-    <div class="col-md-6">
+    <div class="col-md-8">
         <form method="post">
             <div class="form-group">
                 <label asp-for="Id"></label>
@@ -72,7 +72,7 @@
             </div>
             <div class="form-group">
                 <h5>Derivation Scheme</h5>
-                <span>The DerivationScheme represents the destination of the funds received by your invoice.</span>
+                <span>The DerivationScheme represents the destination of the funds received by your invoice on chain.</span>
             </div>
 
             <div class="form-group">
@@ -86,15 +86,45 @@
                     </thead>
                     <tbody>
                         @foreach(var scheme in Model.DerivationSchemes)
-                {
-                    <tr>
-                        <td>@scheme.Crypto</td>
-                        <td>@scheme.Value</td>
-                    </tr>
-        }
+                        {
+                            <tr>
+                                <td>@scheme.Crypto</td>
+                                <td style="max-width:400px;overflow:hidden;">@scheme.Value</td>
+                            </tr>
+                        }
                     </tbody>
                 </table>
             </div>
+
+            <div class="form-group">
+                <div class="form-group">
+                    <h5>Lightning nodes (Experimental)</h5>
+                    <p>
+                        <span>A connection to a lightning charge node is required to generate lignting network enabled invoices.<br /></span>
+                        <span>This is experimental and not advised for production so keep in mind:</span>
+                    </p>
+                </div>
+                <div class="form-group">
+                    <a asp-action="AddLightningNode" class="btn btn-success" role="button"><span class="glyphicon glyphicon-plus"></span>Add or modify a lightning node</a>
+                    <table class="table">
+                        <thead class="thead-inverse">
+                            <tr>
+                                <th>Crypto</th>
+                                <th>Address</th>
+                            </tr>
+                        </thead>
+                        <tbody>
+                            @foreach(var scheme in Model.LightningNodes)
+                            {
+                                <tr>
+                                    <td>@scheme.CryptoCode</td>
+                                    <td>@scheme.Address</td>
+                                </tr>
+                            }
+                        </tbody>
+                    </table>
+                </div>
+            </div>
             <button name="command" type="submit" class="btn btn-success" value="Save">Save</button>
         </form>
     </div>

BTCPayServer/Views/Stores/Wallet.cshtml

@@ -58,7 +58,7 @@
             </p>
         </div>
         <div class="form-group">
-            <label>Substract fees from amount</label>
+            <label>Subtract fees from amount</label>
             <input id="substract-checkbox" name="SubstractFees" class="form-check" type="checkbox" />
         </div>
         <button id="confirm-button" name="command" type="submit" class="btn btn-success">Confirm</button>

BTCPayServer/bundleconfig.json

@@ -0,0 +1,49 @@
+[
+    {
+        "outputFileName": "wwwroot/bundles/main-bundle.min.css",
+        "inputFiles": [
+            "wwwroot/vendor/bootstrap/css/bootstrap.css",
+            "wwwroot/vendor/magnific-popup/magnific-popup.css",
+            "wwwroot/css/creative.css",
+            "wwwroot/css/site.css",
+            "wwwroot/vendor/animatecss/animate.css"
+        ]
+    },
+    {
+        "outputFileName": "wwwroot/bundles/main-bundle.min.js",
+        "inputFiles": [
+            "wwwroot/vendor/jquery/jquery.js",
+            "wwwroot/vendor/popper/popper.js",
+            "wwwroot/vendor/bootstrap/js/bootstrap.js",
+            "wwwroot/vendor/jquery-easing/jquery.easing.js",
+            "wwwroot/vendor/scrollreveal/scrollreveal.min.js",
+            "wwwroot/vendor/magnific-popup/jquery.magnific-popup.js",
+            "wwwroot/js/creative.js"
+        ]
+    },
+    {
+        "outputFileName": "wwwroot/bundles/jqueryvalidate-bundle.min.js",
+        "inputFiles": [
+            "wwwroot/vendor/jquery-validate/jquery.validate.js",
+            "wwwroot/vendor/jquery-validate-unobtrusive/jquery.validate.unobtrusive.js"
+        ]
+    },
+    {
+        "outputFileName": "wwwroot/bundles/checkout-bundle.min.css",
+        "inputFiles": [
+            "wwwroot/vendor/font-awesome/css/font-awesome.css",
+            "wwwroot/css/css.css",
+            "wwwroot/css/normalizer.css"
+        ]
+    },
+    {
+        "outputFileName": "wwwroot/bundles/checkout-bundle.min.js",
+        "inputFiles": [
+            "wwwroot/vendor/clipboard.js/clipboard.js",
+            "wwwroot/vendor/jquery/jquery.js",
+            "wwwroot/js/vue.min.js",
+            "wwwroot/js/vue-qrcode.js",
+            "wwwroot/js/core.js"
+        ]
+    }
+]

BTCPayServer/wwwroot/css/normalizer.css

@@ -8411,6 +8411,17 @@ strong {
     float: right;
 }
 
+.currency-selection {
+    border-bottom: 1px solid #E9E9E9;
+    position: relative;
+    padding: 4px 15px;
+    display: flex;
+    font-weight: 300;
+    color: #565D6E;
+    letter-spacing: .45px;
+    background: #fff;
+}
+
 .single-item-order {
     position: relative;
     padding: 15px;
@@ -10487,6 +10498,7 @@ All mobile class names should be prefixed by m- */
     min-height: 575px;
 }
 
+.paid .currency-selection,
 .expired .order-details,
 .archived .order-details {
     display: none;
@@ -10881,6 +10893,19 @@ bp-spinner {
     display: flex;
 }
 
+.payment__spinner {
+    display: none;
+}
+
+    .payment__spinner > bp-spinner > svg {
+        margin: auto 0px 0px auto;
+        height: 32px;
+        width: 32px;
+        fill: gray;
+        animation: spin 0.55s linear infinite;
+        opacity: .85;
+    }
+
 bp-refund-address.ng-valid .bitcoin-logo {
     opacity: 1;
     margin-left: 0;

BTCPayServer/wwwroot/imlegacy/bitcoin-symbol.svg

@@ -1,6 +1,10 @@
 <!-- Created with Inkscape (http://www.inkscape.org/) -->
-<svg xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns="http://www.w3.org/2000/svg" height="16" width="16" version="1.1" xmlns:cc="http://creativecommons.org/ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
-<g transform="translate(0.00630876,-0.00301984) scale(0.25,0.25)">
+<svg xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns="http://www.w3.org/2000/svg" height="64" width="64"  version="1.1"
+ x="0px" y="0px"
+ viewBox="0 0 64 64"
+ xml:space="preserve"
+ xmlns:cc="http://creativecommons.org/ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
+<g transform="translate(0.00630876,-0.00301984)">
 <path fill="#f7931a" d="m63.033,39.744c-4.274,17.143-21.637,27.576-38.782,23.301-17.138-4.274-27.571-21.638-23.295-38.78,4.272-17.145,21.635-27.579,38.775-23.305,17.144,4.274,27.576,21.64,23.302,38.784z"/>
 <path fill="#FFF" d="m46.103,27.444c0.637-4.258-2.605-6.547-7.038-8.074l1.438-5.768-3.511-0.875-1.4,5.616c-0.923-0.23-1.871-0.447-2.813-0.662l1.41-5.653-3.509-0.875-1.439,5.766c-0.764-0.174-1.514-0.346-2.242-0.527l0.004-0.018-4.842-1.209-0.934,3.75s2.605,0.597,2.55,0.634c1.422,0.355,1.679,1.296,1.636,2.042l-1.638,6.571c0.098,0.025,0.225,0.061,0.365,0.117-0.117-0.029-0.242-0.061-0.371-0.092l-2.296,9.205c-0.174,0.432-0.615,1.08-1.609,0.834,0.035,0.051-2.552-0.637-2.552-0.637l-1.743,4.019,4.569,1.139c0.85,0.213,1.683,0.436,2.503,0.646l-1.453,5.834,3.507,0.875,1.439-5.772c0.958,0.26,1.888,0.5,2.798,0.726l-1.434,5.745,3.511,0.875,1.453-5.823c5.987,1.133,10.489,0.676,12.384-4.739,1.527-4.36-0.076-6.875-3.226-8.515,2.294-0.529,4.022-2.038,4.483-5.155zm-8.022,11.249c-1.085,4.36-8.426,2.003-10.806,1.412l1.928-7.729c2.38,0.594,10.012,1.77,8.878,6.317zm1.086-11.312c-0.99,3.966-7.1,1.951-9.082,1.457l1.748-7.01c1.982,0.494,8.365,1.416,7.334,5.553z"/>
 </g>

BTCPayServer/wwwroot/imlegacy/btc-lightning.svg

@@ -0,0 +1,986 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 17.1.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 200 200" style="enable-background:new 0 0 200 200;" xml:space="preserve">
+<g id="&#x30EC;&#x30A4;&#x30E4;&#x30FC;_2" style="display:none;">
+	
+		<image style="display:inline;overflow:visible;" width="440" height="702" xlink:href="data:image/jpeg;base64,/9j/4AAQSkZJRgABAgEASABIAAD/7AARRHVja3kAAQAEAAAAHgAA/+4AIUFkb2JlAGTAAAAAAQMA
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