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https://github.com/aljazceru/BTCPayServerPlugins.git
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Kukks
@@ -1,23 +1,8 @@
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using System;
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using System.Collections.Concurrent;
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using System.Linq;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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using BTCPayServer.Abstractions.Contracts;
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using BTCPayServer.Abstractions.Models;
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using BTCPayServer.Abstractions.Services;
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using BTCPayServer.Events;
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using BTCPayServer.Payments;
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using BTCPayServer.Services.Invoices;
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using LNURL;
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using Microsoft.AspNetCore.Http;
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using Microsoft.Extensions.Caching.Memory;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.Hosting;
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using Newtonsoft.Json;
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using NNostr.Client;
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using JsonSerializer = System.Text.Json.JsonSerializer;
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namespace BTCPayServer.Plugins.NIP05
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{
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@@ -43,265 +28,4 @@ namespace BTCPayServer.Plugins.NIP05
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return nameof(Nip05Plugin)+ invoiceid;
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}
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}
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public class Zapper : IHostedService
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{
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record PendingZapEvent(string[] relays, NostrEvent nostrEvent);
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private readonly EventAggregator _eventAggregator;
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private readonly Nip5Controller _nip5Controller;
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private readonly IMemoryCache _memoryCache;
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private IEventAggregatorSubscription _subscription;
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private ConcurrentBag<PendingZapEvent> _pendingZapEvents = new();
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public Zapper(EventAggregator eventAggregator, Nip5Controller nip5Controller, IMemoryCache memoryCache)
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{
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_eventAggregator = eventAggregator;
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_nip5Controller = nip5Controller;
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_memoryCache = memoryCache;
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}
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public Task StartAsync(CancellationToken cancellationToken)
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{
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_subscription = _eventAggregator.SubscribeAsync<InvoiceEvent>(Subscription);
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_ = SendZapReceipts(cancellationToken);
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return Task.CompletedTask;
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}
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private async Task SendZapReceipts(CancellationToken cancellationToken)
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{
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while (!cancellationToken.IsCancellationRequested)
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{
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if (_pendingZapEvents.Any())
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{
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var pendingZaps = _pendingZapEvents.Take(Range.All).ToArray();
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var relaysToConnectTo = pendingZaps.SelectMany(@event => @event.relays).Distinct();
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var relaysToZap =relaysToConnectTo.ToDictionary(s => s, s => pendingZaps.Where(@event => @event.relays.Contains(s)).Select(@event => @event.nostrEvent).ToArray());
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await Task.WhenAll(relaysToZap.Select(async relay =>
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{
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try
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{
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var cts = new CancellationTokenSource();
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cts.CancelAfter(TimeSpan.FromSeconds(30));
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var tcs = new TaskCompletionSource();
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using var c = new NostrClient(new Uri(relay.Key));
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await c.ConnectAndWaitUntilConnected(cts.Token);
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var pendingOksOnIds = relay.Value.Select(a => a.Id).ToHashSet();
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c.OkReceived += (sender, okargs) =>
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{
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pendingOksOnIds.Remove(okargs.eventId);
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if(!pendingOksOnIds.Any())
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tcs.SetResult();
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};
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foreach (var nostrEvent in relay.Value)
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{
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await c.PublishEvent(nostrEvent, cts.Token);
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}
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await tcs.Task.WaitAsync(cts.Token);
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await c.Disconnect();
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}
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catch (Exception e)
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{
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}
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}));
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}
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var waitingToken = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken);
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waitingToken.CancelAfter(TimeSpan.FromMinutes(2));
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while (!waitingToken.IsCancellationRequested)
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{
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if (_pendingZapEvents.Count > 10)
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{
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waitingToken.Cancel();
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}
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else
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{
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await Task.Delay(100, waitingToken.Token);
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}
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}
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}
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}
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private async Task Subscription(InvoiceEvent arg)
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{
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if (arg.EventCode != InvoiceEventCode.Completed)
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return;
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var pm = arg.Invoice.GetPaymentMethod(new PaymentMethodId("BTC", PaymentTypes.LNURLPay));
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if (pm is null)
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{
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return;
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}
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if(!_memoryCache.TryGetValue(Nip05Plugin.GetZapRequestCacheKey(arg.Invoice.Id), out var zapRequestEntry) || zapRequestEntry is not string zapRequest)
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{
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return;
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}
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var pmd = (LNURLPayPaymentMethodDetails) pm.GetPaymentMethodDetails();
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var name = pmd.ConsumedLightningAddress.Split("@")[0];
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var settings = await _nip5Controller.Get(name);
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if (settings.storeId != arg.Invoice.StoreId)
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{
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return;
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}
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if (string.IsNullOrEmpty(settings.settings.PrivateKey))
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{
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return;
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}
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var key = NostrExtensions.ParseKey(settings.settings.PrivateKey);
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var zapRequestEvent = JsonSerializer.Deserialize<NostrEvent>(zapRequest);
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var relays = zapRequestEvent.GetTaggedData("relays");
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var tags = zapRequestEvent.Tags.Where(a => a.TagIdentifier.Length == 1).ToList();
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tags.Add(new()
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{
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TagIdentifier = "bolt11",
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Data = new() {pmd.BOLT11}
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});
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tags.Add(new()
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{
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TagIdentifier = "description",
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Data = new() {zapRequest}
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});
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var zapReceipt = new NostrEvent()
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{
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Kind = 9735,
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CreatedAt = DateTimeOffset.UtcNow,
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PublicKey = settings.settings.PubKey,
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Content = zapRequestEvent.Content,
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Tags = tags
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};
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await zapReceipt.ComputeIdAndSignAsync(key);
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_pendingZapEvents.Add(new PendingZapEvent(relays.Concat(settings.settings.Relays?? Array.Empty<string>()).Distinct().ToArray(), zapReceipt));
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}
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public Task StopAsync(CancellationToken cancellationToken)
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{
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_subscription?.Dispose();
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return Task.CompletedTask;
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}
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}
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public class LnurlFilter : PluginHookFilter<LNURLPayRequest>
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{
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private readonly Nip5Controller _nip5Controller;
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private readonly LightningAddressService _lightningAddressService;
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public override string Hook => "modify-lnurlp-request";
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public LnurlFilter(Nip5Controller nip5Controller, LightningAddressService lightningAddressService)
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{
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_nip5Controller = nip5Controller;
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_lightningAddressService = lightningAddressService;
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}
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public override async Task<LNURLPayRequest> Execute(LNURLPayRequest arg)
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{
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var name = arg.ParsedMetadata.FirstOrDefault(pair => pair.Key == "text/identifier").Value
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?.ToLowerInvariant().Split("@")[0];
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if (string.IsNullOrEmpty(name))
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{
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return arg;
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}
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var lnAddress = await _lightningAddressService.ResolveByAddress(name);
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if (lnAddress is null)
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{
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return arg;
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}
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var nip5 = await _nip5Controller.Get(name);
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if (nip5.storeId != lnAddress.StoreDataId)
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{
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return arg;
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}
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arg.NostrPubkey = nip5.settings.PubKey;
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arg.AllowsNostr = true;
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return arg;
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}
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}
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public class LnurlDescriptionFilter : PluginHookFilter<string>
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{
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private readonly IHttpContextAccessor _httpContextAccessor;
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private readonly Nip5Controller _nip5Controller;
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private readonly LightningAddressService _lightningAddressService;
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private readonly IMemoryCache _memoryCache;
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public LnurlDescriptionFilter(IHttpContextAccessor httpContextAccessor,
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Nip5Controller nip5Controller, LightningAddressService lightningAddressService,
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InvoiceRepository invoiceRepository, IMemoryCache memoryCache)
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{
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_httpContextAccessor = httpContextAccessor;
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_nip5Controller = nip5Controller;
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_lightningAddressService = lightningAddressService;
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_memoryCache = memoryCache;
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}
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public override string Hook => "modify-lnurlp-description";
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public override async Task<string> Execute(string arg)
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{
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try
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{
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if (_httpContextAccessor.HttpContext.Request.Query.TryGetValue("nostr", out var nostr) &&
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_httpContextAccessor.HttpContext.Request.RouteValues.TryGetValue("invoiceId", out var invoiceId))
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{
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var metadata = JsonConvert.DeserializeObject<string[][]>(arg);
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var username = metadata
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.FirstOrDefault(strings => strings.FirstOrDefault()?.Equals("text/identifier") is true)
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?.FirstOrDefault()?.ToLowerInvariant().Split("@")[0];
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if (string.IsNullOrEmpty(username))
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{
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return arg;
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}
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var lnAddress = await _lightningAddressService.ResolveByAddress(username);
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var user = await _nip5Controller.Get(username);
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if (user.storeId is not null)
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{
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if (user.storeId != lnAddress.StoreDataId)
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{
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return arg;
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}
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var parsedNote = System.Text.Json.JsonSerializer.Deserialize<NostrEvent>(nostr);
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if (parsedNote?.Kind != 9734)
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{
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return arg;
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}
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if (!parsedNote.Verify())
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{
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return arg;
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}
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var entry =_memoryCache.CreateEntry(Nip05Plugin.GetZapRequestCacheKey(invoiceId.ToString()));
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entry.AbsoluteExpirationRelativeToNow = TimeSpan.FromMinutes(5);
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entry.SetAbsoluteExpiration(TimeSpan.FromMinutes(5));
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entry.SetValue(nostr);
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return nostr;
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}
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}
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}
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catch (Exception e)
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{
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}
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return arg;
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}
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}
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}
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