more logs

Plugins/BTCPayServer.Plugins.NIP05/LnurlDescriptionFilter.cs

@@ -0,0 +1,94 @@
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+using BTCPayServer.Abstractions.Services;
+using BTCPayServer.Services.Invoices;
+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.Caching.Memory;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
+using NNostr.Client;
+
+namespace BTCPayServer.Plugins.NIP05;
+
+public class LnurlDescriptionFilter : PluginHookFilter<string>
+{
+    private readonly IHttpContextAccessor _httpContextAccessor;
+    private readonly Nip5Controller _nip5Controller;
+    private readonly LightningAddressService _lightningAddressService;
+    private readonly IMemoryCache _memoryCache;
+    private readonly ILogger<LnurlDescriptionFilter> _logger;
+
+    public LnurlDescriptionFilter(IHttpContextAccessor httpContextAccessor,
+        Nip5Controller nip5Controller, LightningAddressService lightningAddressService,
+        InvoiceRepository invoiceRepository, IMemoryCache memoryCache, ILogger<LnurlDescriptionFilter> logger)
+    {
+        _httpContextAccessor = httpContextAccessor;
+        _nip5Controller = nip5Controller;
+        _lightningAddressService = lightningAddressService;
+        _memoryCache = memoryCache;
+        _logger = logger;
+    }
+
+    public override string Hook => "modify-lnurlp-description";
+
+    public override async Task<string> Execute(string arg)
+    {
+        
+            if (_httpContextAccessor.HttpContext.Request.Query.TryGetValue("nostr", out var nostr) &&
+                _httpContextAccessor.HttpContext.Request.RouteValues.TryGetValue("invoiceId", out var invoiceId))
+            {
+                try
+                {
+                    var metadata = JsonConvert.DeserializeObject<string[][]>(arg);
+                    var username = metadata
+                        .FirstOrDefault(strings => strings.FirstOrDefault()?.Equals("text/identifier") is true)
+                        ?.FirstOrDefault()?.ToLowerInvariant().Split("@")[0];
+                    if (string.IsNullOrEmpty(username))
+                    {
+                        return arg;
+                    }
+
+                    var lnAddress = await _lightningAddressService.ResolveByAddress(username);
+                    if (lnAddress is null)
+                    {
+                        return arg;
+                    }
+
+                    var user = await _nip5Controller.Get(username);
+                    if (user.storeId is not null)
+                    {
+                        if (user.storeId != lnAddress.StoreDataId)
+                        {
+                            return arg;
+                        }
+
+                        var parsedNote = System.Text.Json.JsonSerializer.Deserialize<NostrEvent>(nostr);
+                        if (parsedNote?.Kind != 9734)
+                        {
+                            return arg;
+                        }
+
+                        if (!parsedNote.Verify())
+                        {
+                            return arg;
+                        }
+
+                        var entry = _memoryCache.CreateEntry(Nip05Plugin.GetZapRequestCacheKey(invoiceId.ToString()));
+                        entry.AbsoluteExpirationRelativeToNow = TimeSpan.FromMinutes(5);
+                        entry.SetAbsoluteExpiration(TimeSpan.FromMinutes(5));
+                        entry.SetValue(nostr);
+                        return nostr;
+                    }
+                }
+                catch (Exception e)
+                {
+                    _logger.LogError(e, $"Error while processing nostr zap request for invoice  {invoiceId}\n{nostr}");
+                }
+            }
+            
+       
+
+        return arg;
+    }
+}