public function create(array $params)
    {
        if (!array_key_exists('amount', $params) ||
            !array_key_exists('currency', $params) ||
            !array_key_exists('description', $params) ||
            !array_key_exists('order_id', $params) ||
            !array_key_exists('payment_options', $params) ||
            !array_key_exists('type', $params)
        ) {
            throw new \InvalidArgumentException('Invalid data provided.');
        }

        return $this->post('/orders', [], $params);
    }