RefundPaymentDataBuilder.php

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

declare(strict_types=1);

namespace Magento\AuthorizenetAcceptjs\Gateway\Request;

use Magento\AuthorizenetAcceptjs\Gateway\SubjectReader;
use Magento\Payment\Gateway\Request\BuilderInterface;
use Magento\Sales\Model\Order\Payment;

/**
 * Adds the basic refund information to the request
 */
class RefundPaymentDataBuilder implements BuilderInterface
{
    /**
     * @var SubjectReader
     */
    private $subjectReader;

    /**
     * @param SubjectReader $subjectReader
     */
    public function __construct(SubjectReader $subjectReader)
    {
        $this->subjectReader = $subjectReader;
    }

    /**
     * @inheritdoc
     * @throws \Exception
     */
    public function build(array $buildSubject): array
    {
        $paymentDO = $this->subjectReader->readPayment($buildSubject);
        $payment = $paymentDO->getPayment();
        $data = [];

        if ($payment instanceof Payment) {
            $data = [
                'transactionRequest' => [
                    'payment' => [
                        'creditCard' => [
                            'cardNumber' => $payment->getAdditionalInformation('ccLast4'),
                            'expirationDate' => 'XXXX'
                        ]
                    ]
                ]
            ];
        }

        return $data;
    }
}