public function getHppPaymentMethodFee($paymentMethod)
    {
        $paymentMethod = str_replace('adyen_hpp_', '', $paymentMethod);

        $paymentFees = $this->getHppPaymentMethodFees();

        if ($paymentFees && is_array($paymentFees) && !empty($paymentFees)) {
            foreach ($paymentFees as $paymentFee) {
                if (isset($paymentFee['code']) && $paymentFee['code'] == $paymentMethod) {
                    if (isset($paymentFee['amount'])) {
                        return $paymentFee['amount'];
                    }
                }
            }
        }

        return null;
    }