VaultDataBuilder.php

<?php
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 *
 * Adyen Payment module (https://www.adyen.com/)
 *
 * Copyright (c) 2019 Adyen BV (https://www.adyen.com/)
 * See LICENSE.txt for license details.
 *
 * Author: Adyen <magento@adyen.com>
 */

namespace Adyen\Payment\Gateway\Request;

use Magento\Payment\Gateway\Request\BuilderInterface;

class VaultDataBuilder implements BuilderInterface
{
    /**
     * @var \Adyen\Payment\Helper\Requests
     */
    private $adyenRequestsHelper;

    /**
     * VaultDataBuilder constructor.
     *
     * @param \Adyen\Payment\Helper\Requests $adyenRequestsHelper
     */
    public function __construct(\Adyen\Payment\Helper\Requests $adyenRequestsHelper)
    {
        $this->adyenRequestsHelper = $adyenRequestsHelper;
    }

    /**
     * @param array $buildSubject
     * @return array
     */
    public function build(array $buildSubject)
    {
        // vault is enabled and shopper provided consent to store card this logic is triggered
        /** @var \Magento\Payment\Gateway\Data\PaymentDataObject $paymentDataObject */
        $paymentDataObject = \Magento\Payment\Gateway\Helper\SubjectReader::readPayment($buildSubject);
        $payment = $paymentDataObject->getPayment();
        $additionalInformation = $payment->getAdditionalInformation();

        $request['body'] = $this->adyenRequestsHelper->buildVaultData([], $additionalInformation);

        return $request;
    }
}