fis_lib_jsonrpc/lib/exception.dart

/// JSON-RPC exception
class JsonRpcException implements Exception {
  String message;
  int code;
  dynamic data;

  JsonRpcException(this.message, [this.code = 0, this.data]);

  @override
  String toString() {
    return 'JSON-RPC Exception: $code $message';
  }

  Map<String, dynamic> toJson() {
    var map = <String, dynamic>{'code': code, 'message': message};
    if (data != null) {
      map['data'] = data;
    }
    return map;
  }
}

/// JSON-RPC network exception
class JsonRpcNetworkException extends JsonRpcException {
  JsonRpcNetworkException(String message, [code = -32000, data])
      : super(message);
}

/// JSON-RPC Server Error
class JsonRpcServerError extends JsonRpcException {
  JsonRpcServerError(String message, [code = -32000, data])
      : super(message, code, data);
  JsonRpcServerError.fromJson(Map<String, dynamic> e) : super('') {
    if (e.containsKey('message')) {
      message = e['message'];
    }
    if (e.containsKey('code')) {
      code = e['code'];
    }
    if (e.containsKey('data')) {
      data = e['data'];
    }
  }
}