public function prepareRequest($method, array $params = [])
    {
        $request = [
            'jsonrpc' => '2.0',
            'method'  => $method,
            'id'      => mt_rand()
        ];

        $request['params'] = $params ? $params : [];

        /*$request['params'] = array_merge($request['params'], $this->params);*/
        return $request;
    }