filter out empty modules (#7897)

Co-authored-by: Ruben Buniatyan <rubo@users.noreply.github.com>

src/Nethermind/Nethermind.Config.Test/SampleJson/SampleJsonConfig.json

@@ -4,7 +4,7 @@
     "Cipher": "test"
   },
   "JsonRpc": {
-    "EnabledModules": "Eth,Debug"
+    "EnabledModules": "Eth,Debug,"
   },
   "Discovery": {
     "Concurrency": "4",
@@ -14,4 +14,4 @@
   {
     "IndexLevelBucketSizes" : [16, 16, 16]
   }
-}
+}

src/Nethermind/Nethermind.JsonRpc.Test/Modules/TestRpcModuleProvider.cs

@@ -53,7 +53,7 @@ private void EnableModule<TOther>() where TOther : IRpcModule
             {
                 if (!_jsonRpcConfig.EnabledModules.Contains(rpcModuleAttribute.ModuleType))
                 {
-                    _jsonRpcConfig.EnabledModules = _jsonRpcConfig.EnabledModules.Union(new[] { rpcModuleAttribute.ModuleType }).ToArray();
+                    _jsonRpcConfig.EnabledModules = _jsonRpcConfig.EnabledModules.Union([rpcModuleAttribute.ModuleType]).ToArray();
                 }
             }
         }

src/Nethermind/Nethermind.JsonRpc/JsonRpcConfig.cs

@@ -11,6 +11,7 @@ public class JsonRpcConfig : IJsonRpcConfig
 {
     public static readonly JsonRpcConfig Default = new();
     private int? _webSocketsPort;
+    private string[] _enabledModules = ModuleType.DefaultModules.ToArray();
     public bool Enabled { get; set; }
     public string Host { get; set; } = "127.0.0.1";
     public int Timeout { get; set; } = 20000;
@@ -29,7 +30,15 @@ public int WebSocketsPort
 
     public string? IpcUnixDomainSocketPath { get; set; } = null;
 
-    public string[] EnabledModules { get; set; } = ModuleType.DefaultModules.ToArray();
+    public string[] EnabledModules
+    {
+        get => _enabledModules;
+        set
+        {
+            _enabledModules = value.Where(m => !string.IsNullOrWhiteSpace(m)).ToArray();
+        }
+    }
+
     public string[] AdditionalRpcUrls { get; set; } = [];
     public long? GasCap { get; set; } = 100000000;
     public int ReportIntervalSeconds { get; set; } = 300;

src/Nethermind/Nethermind.JsonRpc/JsonRpcUrlCollection.cs

@@ -30,8 +30,9 @@ public JsonRpcUrlCollection(ILogManager logManager, IJsonRpcConfig jsonRpcConfig
 
     private void BuildUrls(bool includeWebSockets)
     {
-        bool HasEngineApi = _jsonRpcConfig.EnabledModules.Any(m => m.Equals(ModuleType.Engine, StringComparison.OrdinalIgnoreCase));
-        JsonRpcUrl defaultUrl = new(Uri.UriSchemeHttp, _jsonRpcConfig.Host, _jsonRpcConfig.Port, RpcEndpoint.Http, HasEngineApi, _jsonRpcConfig.EnabledModules, HasEngineApi ? SocketClient<WebSocketMessageStream>.MAX_REQUEST_BODY_SIZE_FOR_ENGINE_API : _jsonRpcConfig.MaxRequestBodySize);
+        bool hasEngineApi = _jsonRpcConfig.EnabledModules.Any(m => m.Equals(ModuleType.Engine, StringComparison.OrdinalIgnoreCase));
+        long? maxRequestBodySize = hasEngineApi ? SocketClient<WebSocketMessageStream>.MAX_REQUEST_BODY_SIZE_FOR_ENGINE_API : _jsonRpcConfig.MaxRequestBodySize;
+        JsonRpcUrl defaultUrl = new(Uri.UriSchemeHttp, _jsonRpcConfig.Host, _jsonRpcConfig.Port, RpcEndpoint.Http, hasEngineApi, _jsonRpcConfig.EnabledModules, maxRequestBodySize);
 
         Add(defaultUrl.Port, defaultUrl);