feat: add ability to use local config file instead of downloading it from internet every time

Author: justdmitry

TonLibDotNet/TonClient.cs

@@ -53,11 +53,11 @@ public TonClient(ILogger<TonClient> logger, Microsoft.Extensions.Options.IOption
         /// <inheritdoc />
         public int SyncStateCurrentSeqno { get; private set; }
 
-		/// <summary>
-		/// Add assembly with additional <see cref="TypeBase"/> classes for LiteServer interaction.
-		/// </summary>
-		/// <param name="assembly">Assembly to add</param>
-		public static void RegisterAssembly(System.Reflection.Assembly assembly)
+        /// <summary>
+        /// Add assembly with additional <see cref="TypeBase"/> classes for LiteServer interaction.
+        /// </summary>
+        /// <param name="assembly">Assembly to add</param>
+        public static void RegisterAssembly(System.Reflection.Assembly assembly)
         {
             TonTypeResolver.AdditionalAsseblies.Add(assembly);
         }
@@ -90,8 +90,20 @@ public static void RegisterAssembly(System.Reflection.Assembly assembly)
                 return null;
             }
 
-            var httpClient = new HttpClient();
-            var fullConfig = await httpClient.GetStringAsync(tonOptions.UseMainnet ? tonOptions.ConfigPathMainnet : tonOptions.ConfigPathTestnet).ConfigureAwait(false);
+            string fullConfig;
+            var localConfigSource = tonOptions.UseMainnet ? tonOptions.ConfigPathLocalMainnet : tonOptions.ConfigPathLocalTestnet;
+            if (!string.IsNullOrEmpty(localConfigSource))
+            {
+                fullConfig = await File.ReadAllTextAsync(localConfigSource);
+                logger.LogDebug("Used local config file: {Name}", localConfigSource);
+            }
+            else
+            {
+                var remoteConfigSource = tonOptions.UseMainnet ? tonOptions.ConfigPathMainnet : tonOptions.ConfigPathTestnet;
+                using var httpClient = new HttpClient();
+                fullConfig = await httpClient.GetStringAsync(remoteConfigSource).ConfigureAwait(false);
+                logger.LogDebug("Used internet config file: {Url}", remoteConfigSource);
+            }
 
             var jdoc = JsonNode.Parse(fullConfig);
             var servers = jdoc["liteservers"].AsArray();

TonLibDotNet/TonOptions.cs

@@ -8,13 +8,35 @@ public class TonOptions
         /// <summary>
         /// Path to JSON config for testnet (default value is from https://ton.org/docs/develop/dapps/apis/adnl).
         /// </summary>
+        /// <remarks>
+        /// Unless <see cref="ConfigPathLocalTestnet"/> is set, this url will be used to obtain config file on every TonClient init.
+        /// </remarks>
         public Uri ConfigPathTestnet { get; set; } = new ("https://ton.org/testnet-global.config.json");
 
         /// <summary>
         /// Path to JSON config for mainnet (default value is from https://ton.org/docs/develop/dapps/apis/adnl).
         /// </summary>
+        /// <remarks>
+        /// Unless <see cref="ConfigPathLocalMainnet"/> is set, this url will be used to obtain config file on every TonClient init.
+        /// </remarks>
         public Uri ConfigPathMainnet { get; set; } = new("https://ton.org/global-config.json");
 
+        /// <summary>
+        /// Path to local file with JSON config for testnet (default value is empty string).
+        /// </summary>
+        /// <remarks>
+        /// Download config file and set this property to prevent downloading config from internet (see <see cref="ConfigPathLocalTestnet"/>) every time.
+        /// </remarks>
+        public string ConfigPathLocalTestnet { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Path to local file with JSON config for mainnet (default value is empty string).
+        /// </summary>
+        /// <remarks>
+        /// Download config file and set this property to prevent downloading config from internet (see <see cref="ConfigPathLocalMainnet"/>) every time.
+        /// </remarks>
+        public string ConfigPathLocalMainnet { get; set; } = string.Empty;
+
         /// <summary>
         /// 'True' by default. Set to 'false' to use testnet config.
         /// </summary>