Add missing file

BTCPayServer/Services/LightningClientFactoryService.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Http;
+using System.Threading.Tasks;
+using BTCPayServer.Lightning;
+
+namespace BTCPayServer.Services
+{
+    public class LightningClientFactoryService
+    {
+        private readonly IHttpClientFactory _httpClientFactory;
+
+        public LightningClientFactoryService(IHttpClientFactory httpClientFactory)
+        {
+            _httpClientFactory = httpClientFactory;
+        }
+
+        public ILightningClient Create(LightningConnectionString lightningConnectionString, BTCPayNetwork network)
+        {
+            if (lightningConnectionString == null)
+                throw new ArgumentNullException(nameof(lightningConnectionString));
+            if (network == null)
+                throw new ArgumentNullException(nameof(network));
+            return new Lightning.LightningClientFactory(network.NBitcoinNetwork)
+            {
+                HttpClient = _httpClientFactory.CreateClient($"{network.CryptoCode}: Lightning client")
+            }.Create(lightningConnectionString);
+        }
+    }
+}