Update packages

Viacoin: add to README

BTCPayServer/BTCPayServer.csproj

@@ -2,7 +2,7 @@
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>netcoreapp2.1</TargetFramework>
-		<Version>1.0.2.52</Version>
+		<Version>1.0.2.56</Version>
     <NoWarn>NU1701,CA1816,CA1308,CA1810,CA2208</NoWarn>
   </PropertyGroup>
   <ItemGroup>
@@ -35,18 +35,18 @@
     <PackageReference Include="Hangfire" Version="1.6.19" />
     <PackageReference Include="Hangfire.MemoryStorage" Version="1.5.2" />
     <PackageReference Include="Hangfire.PostgreSql" Version="1.4.8.2" />
-    <PackageReference Include="LedgerWallet" Version="1.0.1.36" />
+    <PackageReference Include="LedgerWallet" Version="2.0.0" />
     <PackageReference Include="Meziantou.AspNetCore.BundleTagHelpers" Version="2.0.0" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.0" />
     <PackageReference Include="Microsoft.Extensions.Logging.Filter" Version="1.1.2" />
     <PackageReference Include="Microsoft.NetCore.Analyzers" Version="2.6.0" />
-    <PackageReference Include="NBitcoin" Version="4.1.1.27" />
+    <PackageReference Include="NBitcoin" Version="4.1.1.30" />
     <PackageReference Include="NBitpayClient" Version="1.0.0.29" />	  
     <PackageReference Include="DBreeze" Version="1.87.0" />
-    <PackageReference Include="NBXplorer.Client" Version="1.0.2.13" />
+    <PackageReference Include="NBXplorer.Client" Version="1.0.2.14" />
     <PackageReference Include="NicolasDorier.CommandLine" Version="1.0.0.2" />
     <PackageReference Include="NicolasDorier.CommandLine.Configuration" Version="1.0.0.3" />
-    <PackageReference Include="NicolasDorier.StandardConfiguration" Version="1.0.0.14" />
+    <PackageReference Include="NicolasDorier.StandardConfiguration" Version="1.0.0.16" />
     <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="2.1.0" />
     <PackageReference Include="System.Xml.XmlSerializer" Version="4.3.0" />
     <PackageReference Include="Text.Analyzers" Version="2.6.0" />
@@ -114,6 +114,15 @@
 	  <Folder Include="wwwroot\vendor\highlightjs\" />
 	</ItemGroup>
 
+	<ItemGroup>
+	  <Content Update="Views\Server\LNDGRPCServices.cshtml">
+	    <Pack>$(IncludeRazorContentInPack)</Pack>
+	  </Content>
+	  <Content Update="Views\Server\Services.cshtml">
+	    <Pack>$(IncludeRazorContentInPack)</Pack>
+	  </Content>
+	</ItemGroup>
+
 	<ItemGroup>
 	  <None Update="devtest.pfx">
 	    <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>

BTCPayServer/Controllers/InvoiceController.UI.cs

@@ -307,7 +307,7 @@ namespace BTCPayServer.Controllers
         private string GetDisplayName(PaymentMethodId paymentMethodId, BTCPayNetwork network)
         {
             return paymentMethodId.PaymentType == PaymentTypes.BTCLike ?
-                network.DisplayName : network.DisplayName + " - Lightning";
+                network.DisplayName : network.DisplayName + " (via Lightning)";
         }
 
         private string GetImage(PaymentMethodId paymentMethodId, BTCPayNetwork network)

BTCPayServer/Controllers/ServerController.cs

@@ -1,13 +1,17 @@
-using BTCPayServer.HostedServices;
+using BTCPayServer.Configuration;
+using BTCPayServer.HostedServices;
 using BTCPayServer.Models;
 using BTCPayServer.Models.ServerViewModels;
+using BTCPayServer.Payments.Lightning;
 using BTCPayServer.Services;
 using BTCPayServer.Services.Mails;
 using BTCPayServer.Services.Rates;
+using BTCPayServer.Services.Stores;
 using BTCPayServer.Validations;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Identity;
 using Microsoft.AspNetCore.Mvc;
+using NBitcoin.DataEncoders;
 using System;
 using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
@@ -25,14 +29,23 @@ namespace BTCPayServer.Controllers
         private UserManager<ApplicationUser> _UserManager;
         SettingsRepository _SettingsRepository;
         private BTCPayRateProviderFactory _RateProviderFactory;
+        private StoreRepository _StoreRepository;
+        LightningConfigurationProvider _LnConfigProvider;
+        BTCPayServerOptions _Options;
 
         public ServerController(UserManager<ApplicationUser> userManager,
+            Configuration.BTCPayServerOptions options,
             BTCPayRateProviderFactory rateProviderFactory,
-            SettingsRepository settingsRepository)
+            SettingsRepository settingsRepository,
+            LightningConfigurationProvider lnConfigProvider,
+            Services.Stores.StoreRepository storeRepository)
         {
+            _Options = options;
             _UserManager = userManager;
             _SettingsRepository = settingsRepository;
             _RateProviderFactory = rateProviderFactory;
+            _StoreRepository = storeRepository;
+            _LnConfigProvider = lnConfigProvider;
         }
 
         [Route("server/rates")]
@@ -74,7 +87,7 @@ namespace BTCPayServer.Controllers
             try
             {
                 var service = GetCoinaverageService(vm, true);
-                if(service != null)
+                if (service != null)
                     await service.TestAuthAsync();
             }
             catch
@@ -188,6 +201,7 @@ namespace BTCPayServer.Controllers
             if (user == null)
                 return NotFound();
             await _UserManager.DeleteAsync(user);
+            await _StoreRepository.CleanUnreachableStores();
             StatusMessage = "User deleted";
             return RedirectToAction(nameof(ListUsers));
         }
@@ -220,6 +234,122 @@ namespace BTCPayServer.Controllers
             return View(settings);
         }
 
+        [Route("server/services")]
+        public IActionResult Services()
+        {
+            var result = new ServicesViewModel();
+            foreach (var internalNode in _Options.InternalLightningByCryptoCode)
+            {
+                //Only BTC can be supported because gRPC does not allow http path rewriting.
+                if (internalNode.Key == "BTC" && GetExternalLNDConnectionString(internalNode.Value) != null)
+                {
+                    result.LNDServices.Add(new ServicesViewModel.LNDServiceViewModel()
+                    {
+                        Crypto = internalNode.Key,
+                        Type = "gRPC"
+                    });
+                }
+            }
+            return View(result);
+        }
+
+        private LightningConnectionString GetExternalLNDConnectionString(LightningConnectionString value)
+        {
+            if (value.ConnectionType != LightningConnectionType.LndREST)
+                return null;
+            var external = new LightningConnectionString();
+            external.ConnectionType = LightningConnectionType.LndREST;
+            external.BaseUri = _Options.ExternalUrl ?? value.BaseUri;
+            if (external.BaseUri.Scheme == "http" || value.AllowInsecure)
+            {
+                external.AllowInsecure = true;
+            }
+
+            try
+            {
+                if (value.MacaroonFilePath != null)
+                    external.Macaroon = System.IO.File.ReadAllBytes(value.MacaroonFilePath);
+            }
+            catch
+            {
+                return null;
+            }
+            if (value.Macaroon != null)
+                external.Macaroon = value.Macaroon;
+
+            // If external url is provided, then we don't care about cert thumbprint
+            // because we override it at the reverse proxy level with a trusted certificate
+            if (_Options.ExternalUrl == null)
+            {
+                if (value.CertificateThumbprint != null)
+                {
+                    external.CertificateThumbprint = value.CertificateThumbprint;
+                    external.AllowInsecure = false;
+                }
+            }
+            return external;
+        }
+
+        [Route("server/services/lnd-grpc/{cryptoCode}")]
+        public IActionResult LNDGRPCServices(string cryptoCode, ulong? secret)
+        {
+            if (!_Options.InternalLightningByCryptoCode.TryGetValue(cryptoCode.ToUpperInvariant(), out var connectionString))
+                return NotFound();
+            var model = new LNDGRPCServicesViewModel();
+            var external = GetExternalLNDConnectionString(connectionString);
+
+            model.Host = $"{external.BaseUri.DnsSafeHost}:{external.BaseUri.Port}";
+            model.SSL = external.BaseUri.Scheme == "https";
+            if (external.CertificateThumbprint != null)
+            {
+                model.CertificateThumbprint = Encoders.Hex.EncodeData(external.CertificateThumbprint);
+            }
+            if (external.Macaroon != null)
+            {
+                model.Macaroon = Encoders.Hex.EncodeData(external.Macaroon);
+            }
+            if (secret != null)
+            {
+                var lnConfig = _LnConfigProvider.GetConfig(secret.Value);
+                if (lnConfig != null)
+                {
+                    model.QRCodeLink = $"{this.Request.GetAbsoluteRoot().WithTrailingSlash()}lnd-config/{secret.Value}/lnd.config";
+                    model.QRCode = $"config={model.QRCodeLink}";
+                }
+            }
+            return View(model);
+        }
+        [Route("lnd-config/{secret}/lnd.config")]
+        [AllowAnonymous]
+        public IActionResult GetLNDConfig(ulong secret)
+        {
+            var conf = _LnConfigProvider.GetConfig(secret);
+            if (conf == null)
+                return NotFound();
+            return Json(conf);
+        }
+
+        [Route("server/services/lnd-grpc/{cryptoCode}")]
+        [HttpPost]
+        public IActionResult LNDGRPCServicesPOST(string cryptoCode)
+        {
+            if (!_Options.InternalLightningByCryptoCode.TryGetValue(cryptoCode.ToUpperInvariant(), out var connectionString))
+                return NotFound();
+            var external = GetExternalLNDConnectionString(connectionString);
+            LightningConfigurations confs = new LightningConfigurations();
+            LightningConfiguration conf = new LightningConfiguration();
+            conf.Type = "grpc";
+            conf.CryptoCode = cryptoCode;
+            conf.Host = external.BaseUri.DnsSafeHost;
+            conf.Port = external.BaseUri.Port;
+            conf.SSL = external.BaseUri.Scheme == "https";
+            conf.Macaroon = external.Macaroon == null ? null : Encoders.Hex.EncodeData(external.Macaroon);
+            conf.CertificateThumbprint = external.CertificateThumbprint == null ? null : Encoders.Hex.EncodeData(external.CertificateThumbprint);
+            confs.Configurations.Add(conf);
+            var secret = _LnConfigProvider.KeepConfig(confs);
+            return RedirectToAction(nameof(LNDGRPCServices), new { cryptoCode = cryptoCode, secret = secret });
+        }
+
         [Route("server/theme")]
         public async Task<IActionResult> Theme()
         {
@@ -243,7 +373,7 @@ namespace BTCPayServer.Controllers
             {
                 try
                 {
-                    if(!model.Settings.IsComplete())
+                    if (!model.Settings.IsComplete())
                     {
                         model.StatusMessage = "Error: Required fields missing";
                         return View(model);

BTCPayServer/Controllers/StoresController.BTCLike.cs

@@ -195,216 +195,221 @@ namespace BTCPayServer.Controllers
 
             var webSocket = await HttpContext.WebSockets.AcceptWebSocketAsync();
 
-            var hw = new HardwareWalletService(webSocket);
-            object result = null;
-            try
+            using (var normalOperationTimeout = new CancellationTokenSource())
+            using (var signTimeout = new CancellationTokenSource())
             {
-                BTCPayNetwork network = null;
-                if (cryptoCode != null)
+                normalOperationTimeout.CancelAfter(TimeSpan.FromMinutes(30));
+                var hw = new HardwareWalletService(webSocket);
+                object result = null;
+                try
                 {
-                    network = _NetworkProvider.GetNetwork(cryptoCode);
-                    if (network == null)
-                        throw new FormatException("Invalid value for crypto code");
-                }
-
-                BitcoinAddress destinationAddress = null;
-                if (destination != null)
-                {
-                    try
+                    BTCPayNetwork network = null;
+                    if (cryptoCode != null)
                     {
-                        destinationAddress = BitcoinAddress.Create(destination, network.NBitcoinNetwork);
-                    }
-                    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")
-                {
-                    var getxpubResult = await hw.GetExtPubKey(network, account);
-                    result = getxpubResult;
-                }
-                if (command == "getinfo")
-                {
-                    var strategy = GetDirectDerivationStrategy(store, network);
-                    var strategyBase = GetDerivationStrategy(store, network);
-                    if (strategy == null || await hw.GetKeyPath(network, strategy) == null)
-                    {
-                        throw new Exception($"This store is not configured to use this ledger");
+                        network = _NetworkProvider.GetNetwork(cryptoCode);
+                        if (network == null)
+                            throw new FormatException("Invalid value for crypto code");
                     }
 
-                    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 };
-                }
+                    BitcoinAddress destinationAddress = null;
+                    if (destination != null)
+                    {
+                        try
+                        {
+                            destinationAddress = BitcoinAddress.Create(destination, network.NBitcoinNetwork);
+                        }
+                        catch { }
+                        if (destinationAddress == null)
+                            throw new FormatException("Invalid value for destination");
+                    }
 
-                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);
+                    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");
+                    }
 
-                    var unspentCoins = await wallet.GetUnspentCoins(strategyBase);
-                    var changeAddress = await change;
-                    var send = new[] { (
+                    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(normalOperationTimeout.Token);
+                    }
+                    if (command == "getxpub")
+                    {
+                        var getxpubResult = await hw.GetExtPubKey(network, account, normalOperationTimeout.Token);
+                        result = getxpubResult;
+                    }
+                    if (command == "getinfo")
+                    {
+                        var strategy = GetDirectDerivationStrategy(store, network);
+                        var strategyBase = GetDerivationStrategy(store, network);
+                        if (strategy == null || await hw.GetKeyPath(network, strategy, normalOperationTimeout.Token) == null)
+                        {
+                            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 send = new[] { (
                         destination: destinationAddress as IDestination,
                         amount: amountBTC,
                         substractFees: subsctractFeesValue) };
 
-                    foreach (var element in send)
-                    {
-                        if (element.destination == null)
-                            throw new ArgumentNullException(nameof(element.destination));
-                        if (element.amount == null)
-                            throw new ArgumentNullException(nameof(element.amount));
-                        if (element.amount <= Money.Zero)
-                            throw new ArgumentOutOfRangeException(nameof(element.amount), "The amount should be above zero");
-                    }
+                        foreach (var element in send)
+                        {
+                            if (element.destination == null)
+                                throw new ArgumentNullException(nameof(element.destination));
+                            if (element.amount == null)
+                                throw new ArgumentNullException(nameof(element.amount));
+                            if (element.amount <= Money.Zero)
+                                throw new ArgumentOutOfRangeException(nameof(element.amount), "The amount should be above zero");
+                        }
 
-                    var foundKeyPath = await hw.GetKeyPath(network, strategy);
-                    if (foundKeyPath == null)
-                    {
-                        throw new HardwareWalletException($"This store is not configured to use this ledger");
-                    }
+                        var foundKeyPath = await hw.GetKeyPath(network, strategy, normalOperationTimeout.Token);
+                        if (foundKeyPath == null)
+                        {
+                            throw new HardwareWalletException($"This store is not configured to use this ledger");
+                        }
 
-                    TransactionBuilder builder = new TransactionBuilder();
-                    builder.StandardTransactionPolicy.MinRelayTxFee = summary.Status.BitcoinStatus.MinRelayTxFee;
-                    builder.SetConsensusFactory(network.NBitcoinNetwork);
-                    builder.AddCoins(unspentCoins.Select(c => c.Coin).ToArray());
+                        TransactionBuilder builder = new TransactionBuilder();
+                        builder.StandardTransactionPolicy.MinRelayTxFee = summary.Status.BitcoinStatus.MinRelayTxFee;
+                        builder.SetConsensusFactory(network.NBitcoinNetwork);
+                        builder.AddCoins(unspentCoins.Select(c => c.Coin).ToArray());
 
-                    foreach (var element in send)
-                    {
-                        builder.Send(element.destination, element.amount);
-                        if (element.substractFees)
-                            builder.SubtractFees();
-                    }
-                    builder.SetChange(changeAddress.Item1);
+                        foreach (var element in send)
+                        {
+                            builder.Send(element.destination, element.amount);
+                            if (element.substractFees)
+                                builder.SubtractFees();
+                        }
+                        builder.SetChange(changeAddress.Item1);
 
-                    if (network.MinFee == null)
-                    {
-                        builder.SendEstimatedFees(feeRateValue);
-                    }
-                    else
-                    {
-                        var estimatedFee = builder.EstimateFees(feeRateValue);
-                        if (network.MinFee > estimatedFee)
-                            builder.SendFees(network.MinFee);
-                        else
+                        if (network.MinFee == null)
+                        {
                             builder.SendEstimatedFees(feeRateValue);
-                    }
-                    builder.Shuffle();
-                    var unsigned = builder.BuildTransaction(false);
-
-                    var keypaths = new Dictionary<Script, KeyPath>();
-                    foreach (var c in unspentCoins)
-                    {
-                        keypaths.TryAdd(c.Coin.ScriptPubKey, c.KeyPath);
-                    }
-
-                    var hasChange = unsigned.Outputs.Count == 2;
-                    var usedCoins = builder.FindSpentCoins(unsigned);
-
-                    Dictionary<uint256, Transaction> parentTransactions = new Dictionary<uint256, Transaction>();
-
-                    if (!strategy.Segwit)
-                    {
-                        var parentHashes = usedCoins.Select(c => c.Outpoint.Hash).ToHashSet();
-                        var explorer = _ExplorerProvider.GetExplorerClient(network);
-                        var getTransactionAsyncs = parentHashes.Select(h => (Op: explorer.GetTransactionAsync(h), Hash: h)).ToList();
-                        foreach (var getTransactionAsync in getTransactionAsyncs)
-                        {
-                            var tx = (await getTransactionAsync.Op);
-                            if (tx == null)
-                                throw new Exception($"Parent transaction {getTransactionAsync.Hash} not found");
-                            parentTransactions.Add(tx.Transaction.GetHash(), tx.Transaction);
                         }
-                    }
-
-                    var transaction = await hw.SignTransactionAsync(usedCoins.Select(c => new SignatureRequest
-                    {
-                        InputTransaction = parentTransactions.TryGet(c.Outpoint.Hash),
-                        InputCoin = c,
-                        KeyPath = foundKeyPath.Derive(keypaths[c.TxOut.ScriptPubKey]),
-                        PubKey = strategy.Root.Derive(keypaths[c.TxOut.ScriptPubKey]).PubKey
-                    }).ToArray(), unsigned, hasChange ? foundKeyPath.Derive(changeAddress.Item2) : null);
-
-                    try
-                    {
-                        var broadcastResult = await wallet.BroadcastTransactionsAsync(new List<Transaction>() { transaction });
-                        if (!broadcastResult[0].Success)
+                        else
                         {
-                            throw new Exception($"RPC Error while broadcasting: {broadcastResult[0].RPCCode} {broadcastResult[0].RPCCodeMessage} {broadcastResult[0].RPCMessage}");
+                            var estimatedFee = builder.EstimateFees(feeRateValue);
+                            if (network.MinFee > estimatedFee)
+                                builder.SendFees(network.MinFee);
+                            else
+                                builder.SendEstimatedFees(feeRateValue);
                         }
+                        builder.Shuffle();
+                        var unsigned = builder.BuildTransaction(false);
+
+                        var keypaths = new Dictionary<Script, KeyPath>();
+                        foreach (var c in unspentCoins)
+                        {
+                            keypaths.TryAdd(c.Coin.ScriptPubKey, c.KeyPath);
+                        }
+
+                        var hasChange = unsigned.Outputs.Count == 2;
+                        var usedCoins = builder.FindSpentCoins(unsigned);
+
+                        Dictionary<uint256, Transaction> parentTransactions = new Dictionary<uint256, Transaction>();
+
+                        if (!strategy.Segwit)
+                        {
+                            var parentHashes = usedCoins.Select(c => c.Outpoint.Hash).ToHashSet();
+                            var explorer = _ExplorerProvider.GetExplorerClient(network);
+                            var getTransactionAsyncs = parentHashes.Select(h => (Op: explorer.GetTransactionAsync(h), Hash: h)).ToList();
+                            foreach (var getTransactionAsync in getTransactionAsyncs)
+                            {
+                                var tx = (await getTransactionAsync.Op);
+                                if (tx == null)
+                                    throw new Exception($"Parent transaction {getTransactionAsync.Hash} not found");
+                                parentTransactions.Add(tx.Transaction.GetHash(), tx.Transaction);
+                            }
+                        }
+
+
+                        signTimeout.CancelAfter(TimeSpan.FromMinutes(5));
+                        var transaction = await hw.SignTransactionAsync(usedCoins.Select(c => new SignatureRequest
+                        {
+                            InputTransaction = parentTransactions.TryGet(c.Outpoint.Hash),
+                            InputCoin = c,
+                            KeyPath = foundKeyPath.Derive(keypaths[c.TxOut.ScriptPubKey]),
+                            PubKey = strategy.Root.Derive(keypaths[c.TxOut.ScriptPubKey]).PubKey
+                        }).ToArray(), unsigned, hasChange ? foundKeyPath.Derive(changeAddress.Item2) : null, signTimeout.Token);
+                        try
+                        {
+                            var broadcastResult = await wallet.BroadcastTransactionsAsync(new List<Transaction>() { transaction });
+                            if (!broadcastResult[0].Success)
+                            {
+                                throw new Exception($"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 (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 }; }
-            finally { hw.Dispose(); }
-            try
-            {
-                if (result != null)
+                catch (OperationCanceledException)
+                { result = new LedgerTestResult() { Success = false, Error = "Timeout" }; }
+                catch (Exception ex)
+                { result = new LedgerTestResult() { Success = false, Error = ex.Message }; }
+                finally { hw.Dispose(); }
+                try
                 {
-                    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);
+                    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();
                 }
             }
-            catch { }
-            finally
-            {
-                await webSocket.CloseSocket();
-            }
-
             return new EmptyResult();
         }
 

BTCPayServer/HostedServices/MigratorHostedService.cs

@@ -61,18 +61,9 @@ namespace BTCPayServer.HostedServices
             }
         }
 
-        private async Task UnreachableStoreCheck()
+        private Task UnreachableStoreCheck()
         {
-            using (var ctx = _DBContextFactory.CreateContext())
-            {
-                if (!ctx.Database.SupportDropForeignKey())
-                    return;
-                foreach (var store in await ctx.Stores.Where(s => s.UserStores.Where(u => u.Role == StoreRoles.Owner).Count() == 0).ToArrayAsync())
-                {
-                    ctx.Stores.Remove(store);
-                }
-                await ctx.SaveChangesAsync();
-            }
+            return _StoreRepository.CleanUnreachableStores();
         }
 
         private async Task DeprecatedLightningConnectionStringCheck()

BTCPayServer/Hosting/BTCPayServerServices.cs

@@ -92,6 +92,7 @@ namespace BTCPayServer.Hosting
                 return opts.NetworkProvider;
             });
 
+            services.TryAddSingleton<LightningConfigurationProvider>();
             services.TryAddSingleton<LanguageService>();
             services.TryAddSingleton<NBXplorerDashboard>();
             services.TryAddSingleton<StoreRepository>();

BTCPayServer/Models/ServerViewModels/LNDGRPCServicesViewModel.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace BTCPayServer.Models.ServerViewModels
+{
+    public class LNDGRPCServicesViewModel
+    {
+        public string Host { get; set; }
+        public bool SSL { get; set; }
+        public string Macaroon { get; set; }
+        public string CertificateThumbprint { get; set; }
+        public string QRCode { get; set; }
+        public string QRCodeLink { get; set; }
+    }
+}

BTCPayServer/Models/ServerViewModels/ServicesViewModel.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace BTCPayServer.Models.ServerViewModels
+{
+    public class ServicesViewModel
+    {
+        public class LNDServiceViewModel
+        {
+            public string Crypto { get; set; }
+            public string Type { get; set; }
+        }
+        public List<LNDServiceViewModel> LNDServices { get; set; } = new List<LNDServiceViewModel>();
+    }
+}

BTCPayServer/Payments/Lightning/LightningConnectionString.cs

@@ -353,7 +353,7 @@ namespace BTCPayServer.Payments.Lightning
         public LightningConnectionType ConnectionType
         {
             get;
-            private set;
+            set;
         }
         public byte[] Macaroon { get; set; }
         public string MacaroonFilePath { get; set; }

BTCPayServer/Properties/launchSettings.json

@@ -3,16 +3,17 @@
     "Docker-Regtest": {
       "commandName": "Project",
       "launchBrowser": true,
-      "environmentVariables": {
-        "BTCPAY_NETWORK": "regtest",
-        "BTCPAY_LTCEXPLORERURL": "http://127.0.0.1:32838/",
-        "BTCPAY_BTCEXPLORERURL": "http://127.0.0.1:32838/",
-        "ASPNETCORE_ENVIRONMENT": "Development",
-        "BTCPAY_CHAINS": "btc,ltc",
-        "BTCPAY_BTCLIGHTNING": "http://api-token:foiewnccewuify@127.0.0.1:54938/",
-        "BTCPAY_POSTGRES": "User ID=postgres;Host=127.0.0.1;Port=39372;Database=btcpayserver",
-        "BTCPAY_BUNDLEJSCSS": "false"
-      },
+        "environmentVariables": {
+            "BTCPAY_NETWORK": "regtest",
+            "BTCPAY_LTCEXPLORERURL": "http://127.0.0.1:32838/",
+            "BTCPAY_BTCEXPLORERURL": "http://127.0.0.1:32838/",
+            "ASPNETCORE_ENVIRONMENT": "Development",
+            "BTCPAY_CHAINS": "btc,ltc",
+            "BTCPAY_BTCLIGHTNING": "http://api-token:foiewnccewuify@127.0.0.1:54938/",
+            //"BTCPAY_BTCLIGHTNING": "type=lnd-rest;server=https://lnd:lnd@127.0.0.1:53280/;allowinsecure=true",
+            "BTCPAY_POSTGRES": "User ID=postgres;Host=127.0.0.1;Port=39372;Database=btcpayserver",
+            "BTCPAY_BUNDLEJSCSS": "false"
+        },
       "applicationUrl": "http://127.0.0.1:14142/"
     }
   }

BTCPayServer/Services/HardwareWalletService.cs

@@ -34,26 +34,22 @@ namespace BTCPayServer.Services
             }
 
             SemaphoreSlim _Semaphore = new SemaphoreSlim(1, 1);
-            public TimeSpan Timeout { get; set; } = TimeSpan.FromSeconds(10);
-            public async Task<byte[][]> Exchange(byte[][] apdus)
+            public async Task<byte[][]> Exchange(byte[][] apdus, CancellationToken cancellationToken)
             {
                 await _Semaphore.WaitAsync();
                 List<byte[]> responses = new List<byte[]>();
                 try
                 {
-                    using (CancellationTokenSource cts = new CancellationTokenSource(Timeout))
+                    foreach (var apdu in apdus)
                     {
-                        foreach (var apdu in apdus)
-                        {
-                            await this.webSocket.SendAsync(new ArraySegment<byte>(apdu), WebSocketMessageType.Binary, true, cts.Token);
-                        }
-                        foreach (var apdu in apdus)
-                        {
-                            byte[] response = new byte[300];
-                            var result = await this.webSocket.ReceiveAsync(new ArraySegment<byte>(response), cts.Token);
-                            Array.Resize(ref response, result.Count);
-                            responses.Add(response);
-                        }
+                        await this.webSocket.SendAsync(new ArraySegment<byte>(apdu), WebSocketMessageType.Binary, true, cancellationToken);
+                    }
+                    foreach (var apdu in apdus)
+                    {
+                        byte[] response = new byte[300];
+                        var result = await this.webSocket.ReceiveAsync(new ArraySegment<byte>(response), cancellationToken);
+                        Array.Resize(ref response, result.Count);
+                        responses.Add(response);
                     }
                 }
                 finally
@@ -86,20 +82,20 @@ namespace BTCPayServer.Services
             _Ledger = new LedgerClient(_Transport);
         }
 
-        public async Task<LedgerTestResult> Test()
+        public async Task<LedgerTestResult> Test(CancellationToken cancellation)
         {
-            var version = await _Ledger.GetFirmwareVersionAsync();
+            var version = await Ledger.GetFirmwareVersionAsync(cancellation);
             return new LedgerTestResult() { Success = true };
         }
 
-        public async Task<GetXPubResult> GetExtPubKey(BTCPayNetwork network, int account)
+        public async Task<GetXPubResult> GetExtPubKey(BTCPayNetwork network, int account, CancellationToken cancellation)
         {
             if (network == null)
                 throw new ArgumentNullException(nameof(network));
 
             var segwit = network.NBitcoinNetwork.Consensus.SupportSegwit;
             var path = network.GetRootKeyPath().Derive(account, true);
-            var pubkey = await GetExtPubKey(_Ledger, network, path, false);
+            var pubkey = await GetExtPubKey(Ledger, network, path, false, cancellation);
             var derivation = new DerivationStrategyFactory(network.NBitcoinNetwork).CreateDirectDerivationStrategy(pubkey, new DerivationStrategyOptions()
             {
                 P2SH = segwit,
@@ -108,11 +104,11 @@ namespace BTCPayServer.Services
             return new GetXPubResult() { ExtPubKey = derivation.ToString(), KeyPath = path };
         }
 
-        private static async Task<BitcoinExtPubKey> GetExtPubKey(LedgerClient ledger, BTCPayNetwork network, KeyPath account, bool onlyChaincode)
+        private static async Task<BitcoinExtPubKey> GetExtPubKey(LedgerClient ledger, BTCPayNetwork network, KeyPath account, bool onlyChaincode, CancellationToken cancellation)
         {
             try
             {
-                var pubKey = await ledger.GetWalletPubKeyAsync(account);
+                var pubKey = await ledger.GetWalletPubKeyAsync(account, cancellation: cancellation);
                 try
                 {
                     pubKey.GetAddress(network.NBitcoinNetwork);
@@ -122,7 +118,7 @@ namespace BTCPayServer.Services
                     if (network.NBitcoinNetwork.NetworkType == NetworkType.Mainnet)
                         throw new Exception($"The opened ledger app does not seems to support {network.NBitcoinNetwork.Name}.");
                 }
-                var fingerprint = onlyChaincode ? new byte[4] : (await ledger.GetWalletPubKeyAsync(account.Parent)).UncompressedPublicKey.Compress().Hash.ToBytes().Take(4).ToArray();
+                var fingerprint = onlyChaincode ? new byte[4] : (await ledger.GetWalletPubKeyAsync(account.Parent, cancellation: cancellation)).UncompressedPublicKey.Compress().Hash.ToBytes().Take(4).ToArray();
                 var extpubkey = new ExtPubKey(pubKey.UncompressedPublicKey.Compress(), pubKey.ChainCode, (byte)account.Indexes.Length, fingerprint, account.Indexes.Last()).GetWif(network.NBitcoinNetwork);
                 return extpubkey;
             }
@@ -132,7 +128,7 @@ namespace BTCPayServer.Services
             }
         }
 
-        public async Task<KeyPath> GetKeyPath(BTCPayNetwork network, DirectDerivationStrategy directStrategy)
+        public async Task<KeyPath> GetKeyPath(BTCPayNetwork network, DirectDerivationStrategy directStrategy, CancellationToken cancellation)
         {
             List<KeyPath> derivations = new List<KeyPath>();
             if (network.NBitcoinNetwork.Consensus.SupportSegwit)
@@ -146,7 +142,7 @@ namespace BTCPayServer.Services
             {
                 try
                 {
-                    var extpubkey = await GetExtPubKey(_Ledger, network, account, true);
+                    var extpubkey = await GetExtPubKey(Ledger, network, account, true, cancellation);
                     if (directStrategy.Root.PubKey == extpubkey.ExtPubKey.PubKey)
                     {
                         foundKeyPath = account;
@@ -164,15 +160,15 @@ namespace BTCPayServer.Services
 
         public async Task<Transaction> SignTransactionAsync(SignatureRequest[] signatureRequests,
                                                      Transaction unsigned,
-                                                     KeyPath changeKeyPath)
+                                                     KeyPath changeKeyPath,
+                                                     CancellationToken cancellationToken)
         {
-            _Transport.Timeout = TimeSpan.FromMinutes(5);
-            return await Ledger.SignTransactionAsync(signatureRequests, unsigned, changeKeyPath);
+            return await Ledger.SignTransactionAsync(signatureRequests, unsigned, changeKeyPath, cancellationToken);
         }
 
         public void Dispose()
         {
-            if(_Transport != null)
+            if (_Transport != null)
                 _Transport.Dispose();
         }
     }

BTCPayServer/Services/LightningConfigurationProvider.cs

@@ -0,0 +1,55 @@
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using NBitcoin;
+
+namespace BTCPayServer.Services
+{
+    public class LightningConfigurationProvider
+    {
+        ConcurrentDictionary<ulong, (DateTimeOffset expiration, LightningConfigurations config)> _Map = new ConcurrentDictionary<ulong, (DateTimeOffset expiration, LightningConfigurations config)>();
+        public ulong KeepConfig(LightningConfigurations configuration)
+        {
+            CleanExpired();
+            var secret = RandomUtils.GetUInt64();
+            _Map.AddOrReplace(secret, (DateTimeOffset.UtcNow + TimeSpan.FromMinutes(10), configuration));
+            return secret;
+        }
+
+        public LightningConfigurations GetConfig(ulong secret)
+        {
+            CleanExpired();
+            if (!_Map.TryGetValue(secret, out var value))
+                return null;
+            return value.config;
+        }
+
+        private void CleanExpired()
+        {
+            foreach(var item in _Map)
+            {
+                if(item.Value.expiration < DateTimeOffset.UtcNow)
+                {
+                    _Map.TryRemove(item.Key, out var unused);
+                }
+            }
+        }
+    }
+
+    public class LightningConfigurations
+    {
+        public List<LightningConfiguration> Configurations { get; set; } = new List<LightningConfiguration>();
+    }
+    public class LightningConfiguration
+    {
+        public string Type { get; set; }
+        public string CryptoCode { get; set; }
+        public string Host { get; set; }
+        public int Port { get; set; }
+        public bool SSL { get; set; }
+        public string CertificateThumbprint { get; set; }
+        public string Macaroon { get; set; }
+    }
+}

BTCPayServer/Services/Stores/StoreRepository.cs

@@ -112,6 +112,20 @@ namespace BTCPayServer.Services.Stores
             }
         }
 
+        public async Task CleanUnreachableStores()
+        {
+            using (var ctx = _ContextFactory.CreateContext())
+            {
+                if (!ctx.Database.SupportDropForeignKey())
+                    return;
+                foreach (var store in await ctx.Stores.Where(s => s.UserStores.Where(u => u.Role == StoreRoles.Owner).Count() == 0).ToArrayAsync())
+                {
+                    ctx.Stores.Remove(store);
+                }
+                await ctx.SaveChangesAsync();
+            }
+        }
+
         public async Task RemoveStoreUser(string storeId, string userId)
         {
             using (var ctx = _ContextFactory.CreateContext())

BTCPayServer/Views/Server/LNDGRPCServices.cshtml

@@ -0,0 +1,106 @@
+@model BTCPayServer.Models.ServerViewModels.LNDGRPCServicesViewModel
+@{
+    ViewData.SetActivePageAndTitle(ServerNavPages.Services);
+}
+
+
+<h4>GRPC settings</h4>
+<partial name="_StatusMessage" for="@TempData["StatusMessage"]" />
+<div class="row">
+    <div class="col-md-6">
+        <div asp-validation-summary="All" class="text-danger"></div>
+    </div>
+</div>
+
+<div class="row">
+
+    <div class="col-md-8">
+        <div class="form-group">
+            <p>
+                <span>BTCPay exposes gRPC services for outside consumption, you will find connection informaiton here.<br /></span>
+            </p>
+        </div>
+
+        <div class="form-group">
+            <h5>QR Code connection</h5>
+            <p>
+                <span>You can use this QR Code to connect your Zap wallet to your LND instance.<br /></span>
+                <span>This QR Code is only valid for 10 minutes</span>
+            </p>
+        </div>
+        <div class="form-group">
+            @if(Model.QRCode == null)
+            {
+                <div class="form-group">
+                    <form method="post">
+                        <button type="submit" class="btn btn-primary">Show QR Code</button>
+                    </form>
+                </div>
+            }
+            else
+            {
+                <div class="form-group">
+                    <div id="qrCode"></div>
+                    <div id="qrCodeData" data-url="@Html.Raw(Model.QRCode)"></div>
+                </div>
+                <p>See QR Code information by clicking <a href="#detailsQR" data-toggle="collapse">here</a></p>
+                <div id="detailsQR" class="collapse">
+                    <div class="form-group">
+                        <label>QR Code data</label>
+                        <input asp-for="QRCode" readonly class="form-control" />
+                    </div>
+                    <div class="form-group">
+                        Click <a href="@Model.QRCodeLink" target="_blank">here</a> to open the configuration file.
+                    </div>
+                </div>
+            }
+
+
+            <div class="form-group">
+                <h5>More details...</h5>
+                <p>Alternatively, you can see the settings by clicking <a href="#details" data-toggle="collapse">here</a></p>
+            </div>
+            <div id="details" class="collapse">
+                <div class="form-group">
+                    <label asp-for="Host"></label>
+                    <input asp-for="Host" readonly class="form-control" />
+                </div>
+                <div class="form-group">
+                    <label asp-for="SSL"></label>
+                    <input asp-for="SSL" disabled type="checkbox" class="form-check-inline" />
+                </div>
+                @if(Model.Macaroon != null)
+                {
+                    <div class="form-group">
+                        <label asp-for="Macaroon"></label>
+                        <input asp-for="Macaroon" readonly class="form-control" />
+                    </div>
+                }
+                @if(Model.CertificateThumbprint != null)
+                {
+                    <div class="form-group">
+                        <label asp-for="CertificateThumbprint"></label>
+                        <input asp-for="CertificateThumbprint" readonly class="form-control" />
+                    </div>
+                }
+            </div>
+        </div>
+    </div>
+</div>
+
+@section Scripts {
+    @await Html.PartialAsync("_ValidationScriptsPartial")
+
+    @if(Model.QRCode != null)
+    {
+        <script type="text/javascript" src="~/js/qrcode.min.js"></script>
+        <script type="text/javascript">
+        new QRCode(document.getElementById("qrCode"),
+            {
+                text: "@Html.Raw(Model.QRCode)",
+                width: 150,
+                height: 150
+            });
+        </script>
+    }
+}

BTCPayServer/Views/Server/ServerNavPages.cs

@@ -7,6 +7,6 @@ namespace BTCPayServer.Views.Server
 {
     public enum ServerNavPages
     {
-        Index, Users, Rates, Emails, Policies, Theme, Hangfire
+        Index, Users, Rates, Emails, Policies, Theme, Hangfire, Services
     }
 }

BTCPayServer/Views/Server/Services.cshtml

@@ -0,0 +1,53 @@
+@model BTCPayServer.Models.ServerViewModels.ServicesViewModel
+@{
+    ViewData.SetActivePageAndTitle(ServerNavPages.Services);
+}
+
+
+<h4>@ViewData["Title"]</h4>
+<partial name="_StatusMessage" for="@TempData["StatusMessage"]" />
+<div class="row">
+    <div class="col-md-6">
+        <div asp-validation-summary="All" class="text-danger"></div>
+    </div>
+</div>
+
+<div class="row">
+    @if(Model.LNDServices.Count != 0)
+    {
+        <div class="col-md-8">
+            <div class="form-group">
+                <h5>LND nodes</h5>
+                <span>You can get access to internal LND services here. For gRPC, only BTC is supported.</span>
+            </div>
+
+            <div class="form-group">
+                <table class="table table-sm table-responsive-md">
+                    <thead>
+                        <tr>
+                            <th>Crypto</th>
+                            <th>Access Type</th>
+                            <th style="text-align:right">Actions</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        @foreach(var lnd in Model.LNDServices)
+                        {
+                            <tr>
+                                <td>@lnd.Crypto</td>
+                                <td>@lnd.Type</td>
+                                <td style="text-align:right">
+                                    <a asp-action="LNDGRPCServices" asp-route-cryptoCode="@lnd.Crypto">See information</a>
+                                </td>
+                            </tr>
+                        }
+                    </tbody>
+                </table>
+            </div>
+        </div>
+    }
+</div>
+
+@section Scripts {
+    @await Html.PartialAsync("_ValidationScriptsPartial")
+}

BTCPayServer/Views/Server/_Nav.cshtml

@@ -3,6 +3,7 @@
     <a class="nav-link @ViewData.IsActivePage(ServerNavPages.Rates)" asp-action="Rates">Rates</a>
     <a class="nav-link @ViewData.IsActivePage(ServerNavPages.Emails)" asp-action="Emails">Email server</a>
     <a class="nav-link @ViewData.IsActivePage(ServerNavPages.Policies)" asp-action="Policies">Policies</a>
+    <a class="nav-link @ViewData.IsActivePage(ServerNavPages.Services)" asp-action="Services">Services</a>
     <a class="nav-link @ViewData.IsActivePage(ServerNavPages.Theme)" asp-action="Theme">Theme</a>
     <a class="nav-link @ViewData.IsActivePage(ServerNavPages.Hangfire)" href="~/hangfire" target="_blank">Hangfire</a>
 </div>

BTCPayServer/Views/Stores/Wallet.cshtml

@@ -5,7 +5,7 @@
 }
 
 <h4>@ViewData["Title"]</h4>
-<div class="alert alert-danger alert-dismissible" style="display:none;" role="alert">
+<div id="walletAlert" class="alert alert-danger alert-dismissible" style="display:none;" role="alert">
     <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
     <span id="alertMessage"></span>
 </div>

BTCPayServer/wwwroot/js/StoreWallet.js

@@ -6,11 +6,11 @@
     var cryptoCode = $("#cryptoCode").val();
 
     function WriteAlert(type, message) {
-        $(".alert").removeClass("alert-danger");
-        $(".alert").removeClass("alert-warning");
-        $(".alert").removeClass("alert-success");
-        $(".alert").addClass("alert-" + type);
-        $(".alert").css("display", "block");
+        $("#walletAlert").removeClass("alert-danger");
+        $("#walletAlert").removeClass("alert-warning");
+        $("#walletAlert").removeClass("alert-success");
+        $("#walletAlert").addClass("alert-" + type);
+        $("#walletAlert").css("display", "block");
         $("#alertMessage").text(message);
     }
 

README.md

@@ -32,6 +32,7 @@ In addition to Bitcoin, we support the following crypto currencies:
 * Monacoin
 * Polis
 * UFO
+* Viacoin
 
 ## Documentation