add nwc and bump nostr

Plugins/BTCPayServer.Plugins.NIP05/NostrClientPool.cs

@@ -0,0 +1,77 @@
+using System;
+using System.Collections.Concurrent;
+using System.Threading;
+using System.Threading.Tasks;
+using NNostr.Client;
+using NNostr.Client.Protocols;
+
+namespace BTCPayServer.Plugins.NIP05;
+
+public class NostrClientPool
+{
+    private static readonly ConcurrentDictionary<string, NostrClientWrapper> _clientPool = new();
+
+    private static readonly Timer _cleanupTimer;
+
+    static NostrClientPool()
+    {
+        _cleanupTimer = new Timer(CleanupExpiredClients, null, TimeSpan.FromMinutes(5), TimeSpan.FromMinutes(5));
+    }
+
+    public static (INostrClient, IDisposable) GetClient(string connstring)
+    {
+        var connParams = NIP47.ParseUri(new Uri(connstring));
+
+        var clientWrapper = _clientPool.GetOrAdd(connstring.ToString(),
+            k => new NostrClientWrapper(new CompositeNostrClient(connParams.relays)));
+
+        clientWrapper.IncrementUsage();
+
+        return (clientWrapper.Client, new UsageDisposable(clientWrapper));
+    }
+    public static async Task<(INostrClient, IDisposable)> GetClientAndConnect(string connstring, CancellationToken token)
+    {
+        var result = GetClient(connstring);
+        
+        await result.Item1.ConnectAndWaitUntilConnected(token, CancellationToken.None);
+        
+        return result;
+    }
+
+    public static void KillClient(string connstring)
+    {
+        if (_clientPool.TryRemove(connstring, out var clientWrapper))
+        {
+            clientWrapper.Dispose();
+        }
+    }
+
+    private static void CleanupExpiredClients(object state)
+    {
+        foreach (var key in _clientPool.Keys)
+        {
+            if (_clientPool[key].IsExpired())
+            {
+                if (_clientPool.TryRemove(key, out var clientWrapper))
+                {
+                    clientWrapper.Dispose();
+                }
+            }
+        }
+    }
+
+    private class UsageDisposable : IDisposable
+    {
+        private readonly NostrClientWrapper _clientWrapper;
+
+        public UsageDisposable(NostrClientWrapper clientWrapper)
+        {
+            _clientWrapper = clientWrapper;
+        }
+
+        public void Dispose()
+        {
+            _clientWrapper.DecrementUsage();
+        }
+    }
+}