Feature/protobuf (#243)

Protobuf implementation

CryptoExchange.Net/Converters/SystemTextJson/DecimalConverter.cs

@@ -19,22 +19,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
             if (reader.TokenType == JsonTokenType.String)
             {
                 var value = reader.GetString();
-                if (string.IsNullOrEmpty(value) || string.Equals("null", value, StringComparison.OrdinalIgnoreCase))
-                    return null;
-
-                if (string.Equals("Infinity", value, StringComparison.Ordinal))
-                    // Infinity returned by the server, default to max value
-                    return decimal.MaxValue;
-
-                try
-                {
-                    return decimal.Parse(value, NumberStyles.Float, CultureInfo.InvariantCulture);
-                }
-                catch(OverflowException)
-                {
-                    // Value doesn't fit decimal, default to max value
-                    return decimal.MaxValue;
-                }
+                return ExchangeHelpers.ParseDecimal(value);
             }
 
             try

CryptoExchange.Net/Converters/SystemTextJson/SystemTextJsonMessageAccessor.cs

@@ -24,7 +24,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
         private readonly JsonSerializerOptions? _customSerializerOptions;
 
         /// <inheritdoc />
-        public bool IsJson { get; set; }
+        public bool IsValid { get; set; }
 
         /// <inheritdoc />
         public abstract bool OriginalDataAvailable { get; }
@@ -47,7 +47,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
 #endif
         public CallResult<object> Deserialize(Type type, MessagePath? path = null)
         {
-            if (!IsJson)
+            if (!IsValid)
                 return new CallResult<object>(GetOriginalString());
 
             if (_document == null)
@@ -100,7 +100,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
         /// <inheritdoc />
         public NodeType? GetNodeType()
         {
-            if (!IsJson)
+            if (!IsValid)
                 throw new InvalidOperationException("Can't access json data on non-json message");
 
             if (_document == null)
@@ -117,7 +117,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
         /// <inheritdoc />
         public NodeType? GetNodeType(MessagePath path)
         {
-            if (!IsJson)
+            if (!IsValid)
                 throw new InvalidOperationException("Can't access json data on non-json message");
 
             var node = GetPathNode(path);
@@ -139,7 +139,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
 #endif
         public T? GetValue<T>(MessagePath path)
         {
-            if (!IsJson)
+            if (!IsValid)
                 throw new InvalidOperationException("Can't access json data on non-json message");
 
             var value = GetPathNode(path);
@@ -173,7 +173,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
 #endif
         public T?[]? GetValues<T>(MessagePath path)
         {
-            if (!IsJson)
+            if (!IsValid)
                 throw new InvalidOperationException("Can't access json data on non-json message");
 
             var value = GetPathNode(path);
@@ -188,7 +188,7 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
 
         private JsonElement? GetPathNode(MessagePath path)
         {
-            if (!IsJson)
+            if (!IsValid)
                 throw new InvalidOperationException("Can't access json data on non-json message");
 
             if (_document == null)
@@ -279,13 +279,13 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
             try
             {
                 _document = await JsonDocument.ParseAsync(_stream ?? stream).ConfigureAwait(false);
-                IsJson = true;
+                IsValid = true;
                 return CallResult.SuccessResult;
             }
             catch (Exception ex)
             {
                 // Not a json message
-                IsJson = false;
+                IsValid = false;
                 return new CallResult(new DeserializeError("JsonError: " + ex.Message, ex));
             }
         }
@@ -337,18 +337,18 @@ namespace CryptoExchange.Net.Converters.SystemTextJson
                 if (firstByte != 0x7b && firstByte != 0x5b)
                 {
                     // Value doesn't start with `{` or `[`, prevent deserialization attempt as it's slow
-                    IsJson = false;
+                    IsValid = false;
                     return new CallResult(new ServerError("Not a json value"));
                 }
 
                 _document = JsonDocument.Parse(data);
-                IsJson = true;
+                IsValid = true;
                 return CallResult.SuccessResult;
             }
             catch (Exception ex)
             {
                 // Not a json message
-                IsJson = false;
+                IsValid = false;
                 return new CallResult(new DeserializeError("JsonError: " + ex.Message, ex));
             }
         }

CryptoExchange.Net/Converters/SystemTextJson/SystemTextJsonMessageSerializer.cs

@@ -7,7 +7,7 @@ using System.Text.Json.Serialization.Metadata;
 namespace CryptoExchange.Net.Converters.SystemTextJson
 {
     /// <inheritdoc />
-    public class SystemTextJsonMessageSerializer : IMessageSerializer
+    public class SystemTextJsonMessageSerializer : IStringMessageSerializer
     {
         private readonly JsonSerializerOptions _options;