fis_lib_jsonrpc/lib/request.dart

class JsonRpcRequest {
  static const String _serverVersion = '2.0';

  final String method;
  final Object? args;
  final bool notify;

  int? get id => !this.notify ? this.hashCode : null;

  JsonRpcRequest(this.method, this.args, {this.notify = false});

  Map<String, dynamic> toJson() {
    var map = <String, dynamic>{};
    map = {
      'jsonrpc': _serverVersion,
      'method': method,
      'params': (args == null)
          ? []
          : (args is List || args is Map)
              ? args
              : [args]
    };
    if (!notify) map['id'] = id;
    return map;
  }

  @override
  String toString() => 'JsonRpcRequest: ${toJson()}';
}