trait WorldpayPaymentTrait in Commerce Worldpay 8

trait WorldpayPaymentTrait {

  /**
   * Get the billing address for this order.
   *
   * @param OrderInterface $order
   *   The commerce order object.
   *
   * @throws \Drupal\Core\TypedData\Exception\MissingDataException
   *
   * @return array
   */
  private function getBillingAddress(OrderInterface $order) {

    /** @var \Drupal\address\Plugin\Field\FieldType\AddressItem $address */
    $billingAddress = $order
      ->getBillingProfile()
      ->get('address')
      ->first();
    $country_list = \Drupal::service('address.country_repository')
      ->getList();
    return [
      'email' => $order
        ->get('mail')
        ->first()->value,
      'first_name' => $billingAddress
        ->getGivenName(),
      'surname' => $billingAddress
        ->getFamilyName(),
      'address1' => $billingAddress
        ->getAddressLine1(),
      'address2' => $billingAddress
        ->getAddressLine2(),
      'city' => $billingAddress
        ->getLocality(),
      'postCode' => $billingAddress
        ->getPostalCode(),
      'countryCode' => $billingAddress
        ->getCountryCode(),
      'country' => $country_list[$billingAddress
        ->getCountryCode()],
    ];
  }

  /**
   * Get the shipping address to pass to WorldPay.
   *
   * @param \Drupal\commerce_shipping\Entity\ShipmentInterface $shipment
   *   The commerce shipment entity.
   *
   * @throws \Drupal\Core\TypedData\Exception\MissingDataException
   *
   * @return bool|\array
   *   Return false if no shipping profile. Otherwise return the shipping
   *   customer details.
   */
  protected function getShippingAddress(ShipmentInterface $shipment) {
    if (!($shippingProfile = $shipment
      ->getShippingProfile())) {
      return FALSE;
    }
    $country_list = \Drupal::service('address.country_repository')
      ->getList();

    /** @var \Drupal\address\Plugin\Field\FieldType\AddressItem $address */
    $shippingAddress = $shippingProfile
      ->get('address')
      ->first();
    return [
      'DeliveryFirstname' => $shippingAddress
        ->getGivenName(),
      'DeliverySurname' => $shippingAddress
        ->getFamilyName(),
      'DeliveryAddress1' => $shippingAddress
        ->getAddressLine1(),
      'DeliveryAddress2' => $shippingAddress
        ->getAddressLine2(),
      'DeliveryCity' => $shippingAddress
        ->getLocality(),
      'DeliveryPostCode' => $shippingAddress
        ->getPostalCode(),
      'DeliveryCountry' => $shippingAddress
        ->getCountryCode(),
      'DeliveryCountryString' => $country_list[$shippingAddress
        ->getCountryCode()],
    ];
  }

}