[RpcClient] RpcApplicationLog not able to deal with auto-claim gas records in ToJson() method

[cloud8little]

Describe the bug
Use RpcClient to call following code.

RpcApplicationLog applicationLog = rpcClient.GetApplicationLogAsync("0x96cb71e07a998ef4de61cffa5ac6966c25d8e45c09154cacc0b3d1fc3f2c6c87").Result;
Console.WriteLine(applicationLog.ToJson());

use rpcserver:

Request:

{
  "jsonrpc": "2.0",
  "method": "getapplicationlog",
  "params": ["0x96cb71e07a998ef4de61cffa5ac6966c25d8e45c09154cacc0b3d1fc3f2c6c87"],
  "id": 1
}

Response:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "txid": "0x96cb71e07a998ef4de61cffa5ac6966c25d8e45c09154cacc0b3d1fc3f2c6c87",
    "trigger": "Application",
    "vmstate": "HALT",
    "gasconsumed": "9007960",
    "stack": [
      {
        "type": "Boolean",
        "value": true
      }
    ],
    "notifications": [
      {
        "contract": "0x668e0c1f9d7b70a99dd9e06eadd4c784d641afbc",
        "eventname": "Transfer",
        "state": {
          "type": "Array",
          "value": [
            {
              "type": "Any"
            },
            {
              "type": "ByteString",
              "value": "sTvq6eLtwtEFXYEWs3q3ccXFRnY="
            },
            {
              "type": "Integer",
              "value": "8500"
            }
          ]
        }
      },
      {
        "contract": "0xde5f57d430d3dece511cf975a8d37848cb9e0525",
        "eventname": "Transfer",
        "state": {
          "type": "Array",
          "value": [
            {
              "type": "ByteString",
              "value": "sTvq6eLtwtEFXYEWs3q3ccXFRnY="
            },
            {
              "type": "ByteString",
              "value": "Wejy6zUhjWo8DyOhafPXyv8r3Sg="
            },
            {
              "type": "Integer",
              "value": "1"
            }
          ]
        }
      }
    ]
  }
}

Expected behavior
RpcApplicationLog should deal with Type: Any correctly.

Screenshots

Platform:

• OS: Windows 10 x64
• Version neo-modules:

Root Cause:

neo-modules/src/RpcClient/Models/RpcApplicationLog.cs

Lines 66 to 72 in fed3f7a

	public static RpcNotifyEventArgs FromJson(JObject json)
	{
	return new RpcNotifyEventArgs
	{
	Contract = json["contract"].ToScriptHash(),
	EventName = json["eventname"].AsString(),
	State = Utility.StackItemFromJson(json["state"])

neo-modules/src/RpcClient/Utility.cs

Lines 203 to 239 in fed3f7a

	public static StackItem StackItemFromJson(JObject json)
	{
	StackItemType type = json["type"].TryGetEnum<StackItemType>();
	switch (type)
	{
	case StackItemType.Boolean:
	return new Boolean(json["value"].AsBoolean());
	case StackItemType.Buffer:
	return new Buffer(Convert.FromBase64String(json["value"].AsString()));
	case StackItemType.ByteString:
	return new ByteString(Convert.FromBase64String(json["value"].AsString()));
	case StackItemType.Integer:
	return new Integer(new BigInteger(json["value"].AsNumber()));
	case StackItemType.Array:
	Array array = new Array();
	foreach (var item in (JArray)json["value"])
	array.Add(StackItemFromJson(item));
	return array;
	case StackItemType.Struct:
	Struct @struct = new Struct();
	foreach (var item in (JArray)json["value"])
	@struct.Add(StackItemFromJson(item));
	return @struct;
	case StackItemType.Map:
	Map map = new Map();
	foreach (var item in (JArray)json["value"])
	{
	PrimitiveType key = (PrimitiveType)StackItemFromJson(item["key"]);
	map[key] = StackItemFromJson(item["value"]);
	}
	return map;
	case StackItemType.Pointer:
	return new Pointer(null, (int)json["value"].AsNumber());
	case StackItemType.InteropInterface:
	return new InteropInterface(new object()); // See https://github.com/neo-project/neo/blob/master/src/neo/VM/Helper.cs#L194
	}
	return null;

There is no logic for type any, so it returns null which lead to the exception.