Some refactoring improving performance, and better tests for multiple currencies

BTCPayServer.Tests/BTCPayServerTester.cs

@@ -43,6 +43,8 @@ namespace BTCPayServer.Tests
         {
             get; set;
         }
+
+        public Uri LTCNBXplorerUri { get; set; }
         public string CookieFile
         {
             get; set;
@@ -79,7 +81,9 @@ namespace BTCPayServer.Tests
             config.AppendLine($"regtest=1");
             config.AppendLine($"port={Port}");
             config.AppendLine($"explorer.url={NBXplorerUri.AbsoluteUri}");
+            config.AppendLine($"ltc.explorer.url={LTCNBXplorerUri.AbsoluteUri}");
             config.AppendLine($"explorer.cookiefile={CookieFile}");
+            config.AppendLine($"ltc.explorer.cookiefile={CookieFile}");
             config.AppendLine($"hdpubkey={HDPrivateKey.Neuter().ToString(Network.RegTest)}");
             if (Postgres != null)
                 config.AppendLine($"postgres=" + Postgres);

BTCPayServer.Tests/ServerTester.cs

@@ -47,11 +47,17 @@ namespace BTCPayServer.Tests
                 Directory.CreateDirectory(_Directory);
 
 
-            ExplorerNode = new RPCClient(RPCCredentialString.Parse(GetEnvironment("TESTS_RPCCONNECTION", "server=http://127.0.0.1:43782;ceiwHEbqWI83:DwubwWsoo3")), Network);
+            var network = new BTCPayNetworkProvider(Network);
+            ExplorerNode = new RPCClient(RPCCredentialString.Parse(GetEnvironment("TESTS_RPCCONNECTION", "server=http://127.0.0.1:43782;ceiwHEbqWI83:DwubwWsoo3")), network.GetNetwork("BTC").NBitcoinNetwork);
+            LTCExplorerNode = new RPCClient(RPCCredentialString.Parse(GetEnvironment("TESTS_LTCRPCCONNECTION", "server=http://127.0.0.1:43783;ceiwHEbqWI83:DwubwWsoo3")), network.GetNetwork("LTC").NBitcoinNetwork);
+
             ExplorerClient = new ExplorerClient(Network, new Uri(GetEnvironment("TESTS_NBXPLORERURL", "http://127.0.0.1:32838/")));
+            LTCExplorerClient = new ExplorerClient(Network, new Uri(GetEnvironment("TESTS_LTCNBXPLORERURL", "http://127.0.0.1:32839/")));
+
             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")
             };
             PayTester.Port = int.Parse(GetEnvironment("TESTS_PORT", Utils.FreeTcpPort().ToString()));
@@ -107,10 +113,16 @@ namespace BTCPayServer.Tests
             get; set;
         }
 
+        public RPCClient LTCExplorerNode
+        {
+            get; set;
+        }
+
         public ExplorerClient ExplorerClient
         {
             get; set;
         }
+        public ExplorerClient LTCExplorerClient { get; set; }
 
         HttpClient _Http = new HttpClient();
 

BTCPayServer.Tests/TestAccount.cs

@@ -71,6 +71,23 @@ namespace BTCPayServer.Tests
             return store;
         }
 
+        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(),
+            }, "Save");
+        }
+
         public DerivationStrategyBase DerivationScheme { get; set; }
 
         private async Task RegisterAsync()

BTCPayServer.Tests/UnitTest1.cs

@@ -43,7 +43,7 @@ namespace BTCPayServer.Tests
             entity.TxFee = Money.Coins(0.1m);
             entity.Rate = 5000;
 
-            var cryptoData = entity.GetCryptoData("BTC");
+            var cryptoData = entity.GetCryptoData("BTC", null);
             Assert.NotNull(cryptoData); // Should use legacy data to build itself
             entity.Payments = new System.Collections.Generic.List<PaymentEntity>();
             entity.ProductInformation = new ProductInformation() { Price = 5000 };
@@ -92,17 +92,17 @@ namespace BTCPayServer.Tests
                                                            })
             }));
             entity.Payments = new List<PaymentEntity>();
-            cryptoData = entity.GetCryptoData("BTC");
+            cryptoData = entity.GetCryptoData("BTC", null);
             accounting = cryptoData.Calculate();
             Assert.Equal(Money.Coins(5.1m), accounting.Due);
 
-            cryptoData = entity.GetCryptoData("LTC");
+            cryptoData = entity.GetCryptoData("LTC", null);
             accounting = cryptoData.Calculate();
             Assert.Equal(Money.Coins(10.01m), accounting.TotalDue);
 
             entity.Payments.Add(new PaymentEntity() { CryptoCode = "BTC", Output = new TxOut(Money.Coins(1.0m), new Key()), Accounted = true });
 
-            cryptoData = entity.GetCryptoData("BTC");
+            cryptoData = entity.GetCryptoData("BTC", null);
             accounting = cryptoData.Calculate();
             Assert.Equal(Money.Coins(4.2m), accounting.Due);
             Assert.Equal(Money.Coins(1.0m), accounting.CryptoPaid);
@@ -110,7 +110,7 @@ namespace BTCPayServer.Tests
             Assert.Equal(Money.Coins(5.2m), accounting.TotalDue);
             Assert.Equal(2, accounting.TxCount);
 
-            cryptoData = entity.GetCryptoData("LTC");
+            cryptoData = entity.GetCryptoData("LTC", null);
             accounting = cryptoData.Calculate();
             Assert.Equal(Money.Coins(10.01m + 0.1m * 2 - 2.0m /* 8.21m */), accounting.Due);
             Assert.Equal(Money.Coins(0.0m), accounting.CryptoPaid);
@@ -120,7 +120,7 @@ namespace BTCPayServer.Tests
             entity.Payments.Add(new PaymentEntity() { CryptoCode = "LTC", Output = new TxOut(Money.Coins(1.0m), new Key()), Accounted = true });
 
 
-            cryptoData = entity.GetCryptoData("BTC");
+            cryptoData = entity.GetCryptoData("BTC", null);
             accounting = cryptoData.Calculate();
             Assert.Equal(Money.Coins(4.2m - 0.5m + 0.01m / 2), accounting.Due);
             Assert.Equal(Money.Coins(1.0m), accounting.CryptoPaid);
@@ -128,7 +128,7 @@ namespace BTCPayServer.Tests
             Assert.Equal(Money.Coins(5.2m + 0.01m / 2), accounting.TotalDue); // The fee for LTC added
             Assert.Equal(2, accounting.TxCount);
 
-            cryptoData = entity.GetCryptoData("LTC");
+            cryptoData = entity.GetCryptoData("LTC", null);
             accounting = cryptoData.Calculate();
             Assert.Equal(Money.Coins(8.21m - 1.0m + 0.01m), accounting.Due);
             Assert.Equal(Money.Coins(1.0m), accounting.CryptoPaid);
@@ -139,7 +139,7 @@ namespace BTCPayServer.Tests
             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 });
 
-            cryptoData = entity.GetCryptoData("BTC");
+            cryptoData = entity.GetCryptoData("BTC", null);
             accounting = cryptoData.Calculate();
             Assert.Equal(Money.Zero, accounting.Due);
             Assert.Equal(Money.Coins(1.0m) + remaining, accounting.CryptoPaid);
@@ -148,7 +148,7 @@ namespace BTCPayServer.Tests
             Assert.Equal(accounting.Paid, accounting.TotalDue);
             Assert.Equal(2, accounting.TxCount);
 
-            cryptoData = entity.GetCryptoData("LTC");
+            cryptoData = entity.GetCryptoData("LTC", null);
             accounting = cryptoData.Calculate();
             Assert.Equal(Money.Zero, accounting.Due);
             Assert.Equal(Money.Coins(1.0m), accounting.CryptoPaid);
@@ -384,6 +384,93 @@ namespace BTCPayServer.Tests
             }
         }
 
+        [Fact]
+        public void CanPayWithTwoCurrencies()
+        {
+            using (var tester = ServerTester.Create())
+            {
+                tester.Start();
+                var user = tester.NewAccount();
+                user.GrantAccess();
+
+                // First we try payment with a merchant having only BTC
+                var invoice = user.BitPay.CreateInvoice(new Invoice()
+                {
+                    Price = 5000.0,
+                    Currency = "USD",
+                    PosData = "posData",
+                    OrderId = "orderId",
+                    ItemDesc = "Some description",
+                    FullNotifications = true
+                }, Facade.Merchant);
+
+                var cashCow = tester.ExplorerNode;
+                var invoiceAddress = BitcoinAddress.Create(invoice.BitcoinAddress, cashCow.Network);
+                var firstPayment = Money.Coins(0.04m);
+                cashCow.SendToAddress(invoiceAddress, firstPayment);
+                Eventually(() =>
+                {
+                    invoice = user.BitPay.GetInvoice(invoice.Id);
+                    Assert.True(invoice.BtcPaid == firstPayment);
+                });
+
+                Assert.Single(invoice.CryptoInfo); // Only BTC should be presented
+
+                var controller = tester.PayTester.GetController<InvoiceController>(null);
+                var checkout = (Models.InvoicingModels.PaymentModel)((JsonResult)controller.GetStatus(invoice.Id, null).GetAwaiter().GetResult()).Value;
+                Assert.Single(checkout.AvailableCryptos);
+                Assert.Equal("BTC", checkout.CryptoCode);
+
+                //////////////////////
+
+                // Retry now with LTC enabled
+                user.RegisterDerivationScheme("LTC");
+                invoice = user.BitPay.CreateInvoice(new Invoice()
+                {
+                    Price = 5000.0,
+                    Currency = "USD",
+                    PosData = "posData",
+                    OrderId = "orderId",
+                    ItemDesc = "Some description",
+                    FullNotifications = true
+                }, Facade.Merchant);
+
+                cashCow = tester.ExplorerNode;
+                invoiceAddress = BitcoinAddress.Create(invoice.BitcoinAddress, cashCow.Network);
+                firstPayment = Money.Coins(0.04m);
+                cashCow.SendToAddress(invoiceAddress, firstPayment);
+                Eventually(() =>
+                {
+                    invoice = user.BitPay.GetInvoice(invoice.Id);
+                    Assert.True(invoice.BtcPaid == firstPayment);
+                });
+
+                cashCow = tester.LTCExplorerNode;
+                var ltcCryptoInfo = invoice.CryptoInfo.FirstOrDefault(c => c.CryptoCode == "LTC");
+                Assert.NotNull(ltcCryptoInfo);
+                invoiceAddress = BitcoinAddress.Create(ltcCryptoInfo.Address, cashCow.Network);
+                var secondPayment = Money.Coins(decimal.Parse(ltcCryptoInfo.Due));
+                cashCow.Generate(2); // LTC is not worth a lot, so just to make sure we have money...
+                cashCow.SendToAddress(invoiceAddress, secondPayment);
+
+                Eventually(() =>
+                {
+                    invoice = user.BitPay.GetInvoice(invoice.Id);
+                    Assert.Equal(Money.Zero, invoice.BtcDue);
+                    var ltcPaid = invoice.CryptoInfo.First(c => c.CryptoCode == "LTC");
+                    Assert.Equal(Money.Zero, ltcPaid.Due);
+                    Assert.Equal(secondPayment, ltcPaid.CryptoPaid);
+                    Assert.Equal("paid", invoice.Status);
+                    Assert.False((bool)((JValue)invoice.ExceptionStatus).Value);
+                });
+
+                controller = tester.PayTester.GetController<InvoiceController>(null);
+                checkout = (Models.InvoicingModels.PaymentModel)((JsonResult)controller.GetStatus(invoice.Id, "LTC").GetAwaiter().GetResult()).Value;
+                Assert.Equal(2, checkout.AvailableCryptos.Count);
+                Assert.Equal("LTC", checkout.CryptoCode);
+            }
+        }
+
         [Fact]
         public void InvoiceFlowThroughDifferentStatesCorrectly()
         {
@@ -398,8 +485,6 @@ namespace BTCPayServer.Tests
                     Currency = "USD",
                     PosData = "posData",
                     OrderId = "orderId",
-                    //RedirectURL = redirect + "redirect",
-                    //NotificationURL = CallbackUri + "/notification",
                     ItemDesc = "Some description",
                     FullNotifications = true
                 }, Facade.Merchant);

BTCPayServer.Tests/docker-compose.yml

@@ -1,4 +1,4 @@
-version: "3"
+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,
@@ -11,7 +11,8 @@ services:
       dockerfile: BTCPayServer.Tests/Dockerfile
     environment:
       TESTS_RPCCONNECTION: server=http://bitcoind:43782;ceiwHEbqWI83:DwubwWsoo3
-      TESTS_BTCNBXPLORERURL: http://bitcoin-nbxplorer:32838/
+      TESTS_LTCRPCCONNECTION: server=http://litecoind:43782;ceiwHEbqWI83:DwubwWsoo3
+      TESTS_NBXPLORERURL: http://bitcoin-nbxplorer:32838/
       TESTS_LTCNBXPLORERURL: http://litecoin-nbxplorer:32839/
       TESTS_POSTGRES: User ID=postgres;Host=postgres;Port=5432;Database=btcpayserver
       TESTS_PORT: 80

BTCPayServer/BTCPayNetwork.cs

@@ -25,5 +25,9 @@ namespace BTCPayServer
         }
 
         public string CryptoImagePath { get; set; }
+        public override string ToString()
+        {
+            return CryptoCode;
+        }
     }
 }

BTCPayServer/BTCPayServer.csproj

@@ -2,7 +2,7 @@
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>netcoreapp2.0</TargetFramework>
-		<Version>1.0.0.64</Version>
+		<Version>1.0.0.65</Version>
   </PropertyGroup>
   <ItemGroup>
     <Compile Remove="Build\dockerfiles\**" />
@@ -22,7 +22,7 @@
     <PackageReference Include="Hangfire.PostgreSql" Version="1.4.8.1" />
     <PackageReference Include="Microsoft.Extensions.Logging.Filter" Version="1.1.2" />
     <PackageReference Include="NBitcoin" Version="4.0.0.51" />
-    <PackageReference Include="NBitpayClient" Version="1.0.0.14" />	  
+    <PackageReference Include="NBitpayClient" Version="1.0.0.16" />	  
     <PackageReference Include="DBreeze" Version="1.87.0" />
     <PackageReference Include="NBXplorer.Client" Version="1.0.0.28" />
     <PackageReference Include="NicolasDorier.CommandLine" Version="1.0.0.1" />

BTCPayServer/Configuration/BTCPayServerOptions.cs

@@ -46,7 +46,7 @@ namespace BTCPayServer.Configuration
             Logs.Configuration.LogInformation("Network: " + Network);
 
 
-            
+            bool btcHandled = false;
             foreach (var net in new BTCPayNetworkProvider(Network).GetAll())
             {
                 var nbxplorer = NBXplorer.Configuration.NetworkInformation.GetNetworkByName(net.NBitcoinNetwork.Name);
@@ -54,12 +54,16 @@ namespace BTCPayServer.Configuration
                 var cookieFile = conf.GetOrDefault<string>($"{net.CryptoCode}.explorer.cookiefile", nbxplorer.GetDefaultCookieFile());
                 if (explorer != null)
                 {
+#pragma warning disable CS0618
+                    if (net.IsBTC)
+                        btcHandled = true;
+#pragma warning restore CS0618
                     ExplorerFactories.Add(net.CryptoCode, (n) => CreateExplorerClient(n, explorer, cookieFile));
                 }
             }
 
             // Handle legacy explorer.url and explorer.cookiefile
-            if (ExplorerFactories.Count == 0)
+            if (!btcHandled)
             {
                 var nbxplorer = NBXplorer.Configuration.NetworkInformation.GetNetworkByName(Network.Name); // Will get BTC info
                 var explorer = conf.GetOrDefault<Uri>($"explorer.url", new Uri(nbxplorer.GetDefaultExplorerUrl(), UriKind.Absolute));

BTCPayServer/Controllers/InvoiceController.UI.cs

@@ -59,7 +59,7 @@ namespace BTCPayServer.Controllers
                 StatusException = invoice.ExceptionStatus
             };
 
-            foreach (var data in invoice.GetCryptoData())
+            foreach (var data in invoice.GetCryptoData(null))
             {
                 var cryptoInfo = dto.CryptoInfo.First(o => o.CryptoCode.Equals(data.Key, StringComparison.OrdinalIgnoreCase));
                 var accounting = data.Value.Calculate();
@@ -128,7 +128,7 @@ namespace BTCPayServer.Controllers
             var network = _NetworkProvider.GetNetwork(cryptoCode);
             if (invoice == null || network == null || !invoice.Support(network))
                 return null;
-            var cryptoData = invoice.GetCryptoData(network);
+            var cryptoData = invoice.GetCryptoData(network, _NetworkProvider);
 
             var dto = invoice.EntityToDTO(_NetworkProvider);
             var cryptoInfo = dto.CryptoInfo.First(o => o.CryptoCode == network.CryptoCode);
@@ -157,12 +157,15 @@ namespace BTCPayServer.Controllers
                 Status = invoice.Status,
                 CryptoImage = "/" + Url.Content(network.CryptoImagePath),
                 NetworkFeeDescription = $"{accounting.TxCount} transaction{(accounting.TxCount > 1 ? "s" : "")} x {cryptoData.TxFee} {network.CryptoCode}",
-                AvailableCryptos = invoice.GetCryptoData().Select(kv=> new PaymentModel.AvailableCrypto()
+                AvailableCryptos = invoice.GetCryptoData(_NetworkProvider)
-                {
+                                          .Where(i => i.Value.Network != null)
-                    CryptoCode = kv.Key,
+                                          .Select(kv=> new PaymentModel.AvailableCrypto()
-                    CryptoImage = "/" + _NetworkProvider.GetNetwork(kv.Key).CryptoImagePath,
+                                            {
-                    Link = Url.Action(nameof(Checkout), new { invoiceId = invoiceId, cryptoCode = kv.Key })
+                                                CryptoCode = kv.Key,
-                }).ToList()
+                                                CryptoImage = "/" + kv.Value.Network.CryptoImagePath,
+                                                Link = Url.Action(nameof(Checkout), new { invoiceId = invoiceId, cryptoCode = kv.Key })
+                                            }).Where(c => c.CryptoImage != "/")
+                .ToList()
             };
 
             var isMultiCurrency = invoice.GetPayments().Select(p=>p.GetCryptoCode()).Concat(new[] { network.CryptoCode }).Distinct().Count() > 1;

BTCPayServer/Controllers/InvoiceController.cs

@@ -121,7 +121,9 @@ namespace BTCPayServer.Controllers
                                                     Network: derivationStrategy.Network,
                                                     RateProvider: _RateProviders.GetRateProvider(derivationStrategy.Network),
                                                     FeeRateProvider: _FeeProviderFactory.CreateFeeProvider(derivationStrategy.Network)))
-                    .Where(_ => _.Wallet != null && _.FeeRateProvider != null && _.RateProvider != null)
+                    .Where(_ => _.Wallet != null && 
+                                _.FeeRateProvider != null && 
+                                _.RateProvider != null)
                     .Select(_ =>
                     {
                         return new

BTCPayServer/Events/TxOutReceivedEvent.cs

@@ -14,7 +14,7 @@ namespace BTCPayServer.Events
         public override string ToString()
         {
             String address = ScriptPubKey.GetDestinationAddress(Network.NBitcoinNetwork)?.ToString() ?? ScriptPubKey.ToString();
-            return $"{address} received a transaction";
+            return $"{address} received a transaction ({Network.CryptoCode})";
         }
     }
 }

BTCPayServer/Extensions.cs

@@ -37,11 +37,11 @@ namespace BTCPayServer
             return activeProvider != "Microsoft.EntityFrameworkCore.Sqlite";
         }
 
-        public static async Task<Dictionary<uint256, TransactionResult>> GetTransactions(this BTCPayWallet client, BTCPayNetwork network, uint256[] hashes, CancellationToken cts = default(CancellationToken))
+        public static async Task<Dictionary<uint256, TransactionResult>> GetTransactions(this BTCPayWallet client, uint256[] hashes, CancellationToken cts = default(CancellationToken))
         {
             hashes = hashes.Distinct().ToArray();
             var transactions = hashes
-                                        .Select(async o => await client.GetTransactionAsync(network, o, cts))
+                                        .Select(async o => await client.GetTransactionAsync(o, cts))
                                         .ToArray();
             await Task.WhenAll(transactions).ConfigureAwait(false);
             return transactions.Select(t => t.Result).Where(t => t != null).ToDictionary(o => o.Transaction.GetHash());

BTCPayServer/HostedServices/InvoiceWatcher.cs

@@ -150,7 +150,7 @@ namespace BTCPayServer.HostedServices
             }
 
             var derivationStrategies = invoice.GetDerivationStrategies(_NetworkProvider).ToArray();
-            var payments = await GetPaymentsWithTransaction(derivationStrategies, invoice);
+            var payments = await GetPaymentsWithTransaction(null, derivationStrategies, invoice);
             foreach (Task<NetworkCoins> coinsAsync in GetCoinsPerNetwork(context, invoice, derivationStrategies))
             {
                 var coins = await coinsAsync;
@@ -173,11 +173,11 @@ namespace BTCPayServer.HostedServices
                 }
                 if (dirtyAddress)
                 {
-                    payments = await GetPaymentsWithTransaction(derivationStrategies, invoice);
+                    payments = await GetPaymentsWithTransaction(payments, derivationStrategies, invoice);
                 }
                 var network = coins.Wallet.Network;
-                var cryptoData = invoice.GetCryptoData(network);
+                var cryptoData = invoice.GetCryptoData(network, _NetworkProvider);
-                var cryptoDataAll = invoice.GetCryptoData();
+                var cryptoDataAll = invoice.GetCryptoData(_NetworkProvider);
                 var accounting = cryptoData.Calculate();
 
                 if (invoice.Status == "new" || invoice.Status == "expired")
@@ -222,7 +222,7 @@ namespace BTCPayServer.HostedServices
 
                 if (invoice.Status == "paid")
                 {
-                    var transactions = payments;
+                    IEnumerable<AccountedPaymentEntity> transactions = payments;
                     if (invoice.SpeedPolicy == SpeedPolicy.HighSpeed)
                     {
                         transactions = transactions.Where(t => t.Confirmations >= 1 || !t.Transaction.RBF);
@@ -260,7 +260,7 @@ namespace BTCPayServer.HostedServices
 
                 if (invoice.Status == "confirmed")
                 {
-                    var transactions = payments;
+                    IEnumerable<AccountedPaymentEntity> transactions = payments;
                     transactions = transactions.Where(t => t.Confirmations >= 6);
                     var totalConfirmed = transactions.Select(t => t.Payment.GetValue(cryptoDataAll, cryptoData.CryptoCode)).Sum();
                     if (totalConfirmed >= accounting.TotalDue)
@@ -292,21 +292,59 @@ namespace BTCPayServer.HostedServices
                                 .ToArray();
         }
 
-        private async Task<IEnumerable<AccountedPaymentEntity>> GetPaymentsWithTransaction(DerivationStrategy[] derivations, InvoiceEntity invoice)
+
+        class AccountedPaymentEntities : List<AccountedPaymentEntity>
+        {
+            public AccountedPaymentEntities(AccountedPaymentEntities existing)
+            {
+                if (existing != null)
+                    _Transactions = existing._Transactions;
+            }
+
+            Dictionary<uint256, TransactionResult> _Transactions = new Dictionary<uint256, TransactionResult>();
+
+            public void AddToCache(IEnumerable<TransactionResult> transactions)
+            {
+                foreach (var tx in transactions)
+                    _Transactions.TryAdd(tx.Transaction.GetHash(), tx);
+            }
+            public TransactionResult GetTransaction(uint256 txId)
+            {
+                _Transactions.TryGetValue(txId, out TransactionResult result);
+                return result;
+            }
+
+            internal IEnumerable<TransactionResult> GetTransactions()
+            {
+                return _Transactions.Values;
+            }
+        }
+        private async Task<AccountedPaymentEntities> GetPaymentsWithTransaction(AccountedPaymentEntities previous, DerivationStrategy[] derivations, InvoiceEntity invoice)
         {
             List<PaymentEntity> updatedPaymentEntities = new List<PaymentEntity>();
-            List<AccountedPaymentEntity> accountedPayments = new List<AccountedPaymentEntity>();
+            AccountedPaymentEntities accountedPayments = new AccountedPaymentEntities(previous);
             foreach (var network in derivations.Select(d => d.Network))
             {
                 var wallet = _WalletProvider.GetWallet(network);
                 if (wallet == null)
                     continue;
-                var transactions = await wallet.GetTransactions(network, invoice.GetPayments(network).Select(t => t.Outpoint.Hash).ToArray());
+
-                var conflicts = GetConflicts(transactions.Select(t => t.Value));
+                var hashesToFetch = new HashSet<uint256>(invoice
+                    .GetPayments(network)
+                    .Select(t => t.Outpoint.Hash)
+                    .Where(h => accountedPayments?.GetTransaction(h) == null)
+                    .ToList());
+
+
+                if (hashesToFetch.Count > 0)
+                {
+                    accountedPayments.AddToCache((await wallet.GetTransactions(hashesToFetch.ToArray())).Select(t => t.Value));
+                }
+                var conflicts = GetConflicts(accountedPayments.GetTransactions());
                 foreach (var payment in invoice.GetPayments(network))
                 {
-                    TransactionResult tx;
+                    TransactionResult tx = accountedPayments.GetTransaction(payment.Outpoint.Hash);
-                    if (!transactions.TryGetValue(payment.Outpoint.Hash, out tx))
+                    if (tx == null)
                         continue;
 
                     AccountedPaymentEntity accountedPayment = new AccountedPaymentEntity()

BTCPayServer/Models/InvoiceResponse.cs

@@ -37,81 +37,6 @@ namespace BTCPayServer.Models
         }
     }
 
-    public class InvoiceCryptoInfo
-    {
-        [JsonProperty("cryptoCode")]
-        public string CryptoCode { get; set; }
-
-        [JsonProperty("rate")]
-        public decimal Rate { get; set; }
-
-        //"exRates":{"USD":4320.02}
-        [JsonProperty("exRates")]
-        public Dictionary<string, double> ExRates
-        {
-            get; set;
-        }
-
-        //"btcPaid":"0.000000"
-        [JsonProperty("paid")]
-        public string Paid
-        {
-            get; set;
-        }
-
-        //"btcPrice":"0.001157"
-        [JsonProperty("price")]
-        public string Price
-        {
-            get; set;
-        }
-
-        //"btcDue":"0.001160"
-        /// <summary>
-        /// Amount of crypto remaining to pay this invoice
-        /// </summary>
-        [JsonProperty("due")]
-        public string Due
-        {
-            get; set;
-        }
-
-        [JsonProperty("paymentUrls")]
-        public NBitpayClient.InvoicePaymentUrls PaymentUrls
-        {
-            get; set;
-        }
-
-        [JsonProperty("address")]
-        public string Address { get; set; }
-        [JsonProperty("url")]
-        public string Url { get; set; }
-
-        /// <summary>
-        /// Total amount of this invoice
-        /// </summary>
-        [JsonProperty("totalDue")]
-        public string TotalDue { get; set; }
-
-        /// <summary>
-        /// Total amount of network fee to pay to the invoice
-        /// </summary>
-        [JsonProperty("networkFee")]
-        public string NetworkFee { get; set; }
-
-        /// <summary>
-        /// Number of transactions required to pay
-        /// </summary>
-        [JsonProperty("txCount")]
-        public int TxCount { get; set; }
-
-        /// <summary>
-        /// Total amount of the invoice paid in this crypto
-        /// </summary>
-        [JsonProperty("cryptoPaid")]
-        public Money CryptoPaid { get; set; }
-    }
-
     //{"facade":"pos/invoice","data":{,}}
     public class InvoiceResponse
     {
@@ -151,7 +76,7 @@ namespace BTCPayServer.Models
         }
 
         [JsonProperty("cryptoInfo")]
-        public List<InvoiceCryptoInfo> CryptoInfo { get; set; }
+        public List<NBitpayClient.InvoiceCryptoInfo> CryptoInfo { get; set; }
 
         //"price":5
         [JsonProperty("price")]

BTCPayServer/Services/Invoices/InvoiceEntity.cs

@@ -5,7 +5,6 @@ using System;
 using System.Collections.Generic;
 using System.Text;
 using BTCPayServer.Models;
-using NBitpayClient;
 using Newtonsoft.Json.Linq;
 using NBitcoin.DataEncoders;
 using BTCPayServer.Data;
@@ -234,7 +233,7 @@ namespace BTCPayServer.Services.Invoices
         }
         public List<PaymentEntity> GetPayments(string cryptoCode)
         {
-            return Payments.Where(p=>p.CryptoCode == cryptoCode).ToList();
+            return Payments.Where(p => p.CryptoCode == cryptoCode).ToList();
         }
         public List<PaymentEntity> GetPayments(BTCPayNetwork network)
         {
@@ -323,11 +322,11 @@ namespace BTCPayServer.Services.Invoices
                 Flags = new Flags() { Refundable = Refundable }
             };
 
-            dto.CryptoInfo = new List<InvoiceCryptoInfo>();
+            dto.CryptoInfo = new List<NBitpayClient.InvoiceCryptoInfo>();
-            foreach (var info in this.GetCryptoData().Values)
+            foreach (var info in this.GetCryptoData(networkProvider).Values)
             {
                 var accounting = info.Calculate();
-                var cryptoInfo = new InvoiceCryptoInfo();
+                var cryptoInfo = new NBitpayClient.InvoiceCryptoInfo();
                 cryptoInfo.CryptoCode = info.CryptoCode;
                 cryptoInfo.Rate = info.Rate;
                 cryptoInfo.Price = Money.Coins(ProductInformation.Price / cryptoInfo.Rate).ToString();
@@ -337,7 +336,7 @@ namespace BTCPayServer.Services.Invoices
                 cryptoInfo.TotalDue = accounting.TotalDue.ToString();
                 cryptoInfo.NetworkFee = accounting.NetworkFee.ToString();
                 cryptoInfo.TxCount = accounting.TxCount;
-                cryptoInfo.CryptoPaid = accounting.CryptoPaid;
+                cryptoInfo.CryptoPaid = accounting.CryptoPaid.ToString();
 
                 cryptoInfo.Address = info.DepositAddress;
                 cryptoInfo.ExRates = new Dictionary<string, double>
@@ -345,12 +344,12 @@ namespace BTCPayServer.Services.Invoices
                     { ProductInformation.Currency, (double)cryptoInfo.Rate }
                 };
 
-                var scheme = networkProvider.GetNetwork(info.CryptoCode)?.UriScheme ?? "BTC";
+                var scheme = info.Network.UriScheme;
                 var cryptoSuffix = cryptoInfo.CryptoCode == "BTC" ? "" : "/" + cryptoInfo.CryptoCode;
                 cryptoInfo.Url = ServerUrl.WithTrailingSlash() + $"invoice{cryptoSuffix}?id=" + Id;
 
 
-                cryptoInfo.PaymentUrls = new InvoicePaymentUrls()
+                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}")}",
@@ -392,23 +391,23 @@ namespace BTCPayServer.Services.Invoices
 
         internal bool Support(BTCPayNetwork network)
         {
-            var rates = GetCryptoData();
+            var rates = GetCryptoData(null);
             return rates.TryGetValue(network.CryptoCode, out var data);
         }
 
-        public CryptoData GetCryptoData(string cryptoCode)
+        public CryptoData GetCryptoData(string cryptoCode, BTCPayNetworkProvider networkProvider)
         {
-            GetCryptoData().TryGetValue(cryptoCode, out var data);
+            GetCryptoData(networkProvider).TryGetValue(cryptoCode, out var data);
             return data;
         }
 
-        public CryptoData GetCryptoData(BTCPayNetwork network)
+        public CryptoData GetCryptoData(BTCPayNetwork network, BTCPayNetworkProvider networkProvider)
         {
-            GetCryptoData().TryGetValue(network.CryptoCode, out var data);
+            GetCryptoData(networkProvider).TryGetValue(network.CryptoCode, out var data);
             return data;
         }
 
-        public Dictionary<string, CryptoData> GetCryptoData()
+        public Dictionary<string, CryptoData> GetCryptoData(BTCPayNetworkProvider networkProvider)
         {
             Dictionary<string, CryptoData> rates = new Dictionary<string, CryptoData>();
             var serializer = new Serializer(Dummy);
@@ -416,7 +415,8 @@ namespace BTCPayServer.Services.Invoices
             // Legacy
             if (Rate != 0.0m)
             {
-                rates.TryAdd("BTC", new CryptoData() { ParentEntity = this, Rate = Rate, CryptoCode = "BTC", TxFee = TxFee, FeeRate = new FeeRate(TxFee, 100), DepositAddress = DepositAddress });
+                var btcNetwork = networkProvider?.GetNetwork("BTC");
+                rates.TryAdd("BTC", new CryptoData() { ParentEntity = this, Rate = Rate, CryptoCode = "BTC", TxFee = TxFee, FeeRate = new FeeRate(TxFee, 100), DepositAddress = DepositAddress, Network = btcNetwork });
             }
             if (CryptoData != null)
             {
@@ -425,6 +425,7 @@ namespace BTCPayServer.Services.Invoices
                     var r = serializer.ToObject<CryptoData>(prop.Value.ToString());
                     r.CryptoCode = prop.Name;
                     r.ParentEntity = this;
+                    r.Network = networkProvider?.GetNetwork(r.CryptoCode);
                     rates.TryAdd(r.CryptoCode, r);
                 }
             }
@@ -433,6 +434,14 @@ namespace BTCPayServer.Services.Invoices
         }
 
         Network Dummy = Network.Main;
+
+        public void SetCryptoData(CryptoData cryptoData)
+        {
+            var dict = GetCryptoData(null);
+            dict.AddOrReplace(cryptoData.CryptoCode, cryptoData);
+            SetCryptoData(dict);
+        }
+
         public void SetCryptoData(Dictionary<string, CryptoData> cryptoData)
         {
             var obj = new JObject();
@@ -485,6 +494,8 @@ namespace BTCPayServer.Services.Invoices
     {
         [JsonIgnore]
         public InvoiceEntity ParentEntity { get; set; }
+        [JsonIgnore]
+        public BTCPayNetwork Network { get; set; }
         [JsonProperty(PropertyName = "cryptoCode", DefaultValueHandling = DefaultValueHandling.Ignore)]
         public string CryptoCode { get; set; }
         [JsonProperty(PropertyName = "rate")]
@@ -498,7 +509,7 @@ namespace BTCPayServer.Services.Invoices
 
         public CryptoDataAccounting Calculate()
         {
-            var cryptoData = ParentEntity.GetCryptoData();
+            var cryptoData = ParentEntity.GetCryptoData(null);
             var totalDue = Money.Coins(ParentEntity.ProductInformation.Price / Rate);
             var paid = Money.Zero;
             var cryptoPaid = Money.Zero;

BTCPayServer/Services/Invoices/InvoiceRepository.cs

@@ -125,16 +125,15 @@ namespace BTCPayServer.Services.Invoices
                     CustomerEmail = invoice.RefundMail
                 });
 
-                foreach (var cryptoData in invoice.GetCryptoData().Values)
+                foreach (var cryptoData in invoice.GetCryptoData(networkProvider).Values)
                 {
-                    var network = networkProvider.GetNetwork(cryptoData.CryptoCode);
+                    if (cryptoData.Network == null)
-                    if (network == null)
                         throw new InvalidOperationException("CryptoCode unsupported");
                     context.AddressInvoices.Add(new AddressInvoiceData()
                     {
                         InvoiceDataId = invoice.Id,
                         CreatedTime = DateTimeOffset.UtcNow,
-                    }.SetHash(BitcoinAddress.Create(cryptoData.DepositAddress, network.NBitcoinNetwork).ScriptPubKey.Hash, network.CryptoCode));
+                    }.SetHash(BitcoinAddress.Create(cryptoData.DepositAddress, cryptoData.Network.NBitcoinNetwork).ScriptPubKey.Hash, cryptoData.CryptoCode));
                     context.HistoricalAddressInvoices.Add(new HistoricalAddressInvoiceData()
                     {
                         InvoiceDataId = invoice.Id,
@@ -169,8 +168,7 @@ namespace BTCPayServer.Services.Invoices
                     return false;
 
                 var invoiceEntity = ToObject<InvoiceEntity>(invoice.Blob);
-                var cryptoData = invoiceEntity.GetCryptoData();
+                var currencyData = invoiceEntity.GetCryptoData(network, null);
-                var currencyData = cryptoData.Where(c => c.Value.CryptoCode == network.CryptoCode).Select(f => f.Value).FirstOrDefault();
                 if (currencyData == null)
                     return false;
 
@@ -187,7 +185,7 @@ namespace BTCPayServer.Services.Invoices
                     invoiceEntity.DepositAddress = currencyData.DepositAddress;
                 }
 #pragma warning restore CS0618
-                invoiceEntity.SetCryptoData(cryptoData);
+                invoiceEntity.SetCryptoData(currencyData);
                 invoice.Blob = ToBytes(invoiceEntity);
 
                 context.AddressInvoices.Add(new AddressInvoiceData() {
@@ -207,7 +205,7 @@ namespace BTCPayServer.Services.Invoices
 
         private static void MarkUnassigned(string invoiceId, InvoiceEntity entity, ApplicationDbContext context, string cryptoCode)
         {
-            foreach (var address in entity.GetCryptoData())
+            foreach (var address in entity.GetCryptoData(null))
             {
                 if (cryptoCode != null && cryptoCode != address.Value.CryptoCode)
                     continue;

BTCPayServer/Services/Rates/CachedRateProvider.cs

@@ -37,13 +37,7 @@ namespace BTCPayServer.Services.Rates
                 return _Inner.GetRateAsync(currency);
             });
         }
-
+        
-        private bool TryGetFromCache(string key, out object obj)
-        {
-            obj = _MemoryCache.Get(key);
-            return obj != null;
-        }
-
         public Task<ICollection<Rate>> GetRatesAsync()
         {
             return _MemoryCache.GetOrCreateAsync("GLOBAL_RATES", (ICacheEntry entry) =>

BTCPayServer/Services/Wallets/BTCPayWallet.cs

@@ -9,6 +9,7 @@ using System.Threading.Tasks;
 using BTCPayServer.Data;
 using System.Threading;
 using NBXplorer.Models;
+using Microsoft.Extensions.Caching.Memory;
 
 namespace BTCPayServer.Services.Wallets
 {
@@ -51,6 +52,8 @@ namespace BTCPayServer.Services.Wallets
             }
         }
 
+        public TimeSpan CacheSpan { get; private set; } = TimeSpan.FromMinutes(60);
+
         public async Task<BitcoinAddress> ReserveAddressAsync(DerivationStrategyBase derivationStrategy)
         {
             var pathInfo = await _Client.GetUnusedAsync(derivationStrategy, DerivationFeature.Deposit, 0, true).ConfigureAwait(false);
@@ -62,10 +65,8 @@ namespace BTCPayServer.Services.Wallets
             await _Client.TrackAsync(derivationStrategy);
         }
 
-        public Task<TransactionResult> GetTransactionAsync(BTCPayNetwork network, uint256 txId, CancellationToken cancellation = default(CancellationToken))
+        public Task<TransactionResult> GetTransactionAsync(uint256 txId, CancellationToken cancellation = default(CancellationToken))
         {
-            if (network == null)
-                throw new ArgumentNullException(nameof(network));
             if (txId == null)
                 throw new ArgumentNullException(nameof(txId));
             return _Client.GetTransactionAsync(txId, cancellation);

BTCPayServer/Services/Wallets/BTCPayWalletProvider.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
+using Microsoft.Extensions.Caching.Memory;
 
 namespace BTCPayServer.Services.Wallets
 {
@@ -29,7 +30,7 @@ namespace BTCPayServer.Services.Wallets
                 throw new ArgumentNullException(nameof(cryptoCode));
             var network = _NetworkProvider.GetNetwork(cryptoCode);
             var client = _Client.GetExplorerClient(cryptoCode);
-            if (network == null && client == null)
+            if (network == null || client == null)
                 return null;
             return new BTCPayWallet(client, network);
         }