PaymentDataBuilder.php

<?php
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 *
 * Adyen Payment module (https://www.adyen.com/)
 *
 * Copyright (c) 2015 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;

/**
 * Payment Data Builder
 */
class PaymentDataBuilder implements BuilderInterface
{

    /**
     * @var \Adyen\Payment\Helper\Data
     */
    private $adyenHelper;

    /**
     * PaymentDataBuilder constructor.
     *
     * @param \Adyen\Payment\Helper\Data $adyenHelper
     */
    public function __construct(\Adyen\Payment\Helper\Data $adyenHelper)
    {
        $this->adyenHelper = $adyenHelper;
    }
    
    /**
     * @param array $buildSubject
     * @return array
     */
    public function build(array $buildSubject)
    {
        /** @var \Magento\Payment\Gateway\Data\PaymentDataObject $paymentDataObject */
        $paymentDataObject = \Magento\Payment\Gateway\Helper\SubjectReader::readPayment($buildSubject);

        $order = $paymentDataObject->getOrder();
        $payment = $paymentDataObject->getPayment();
        $fullOrder = $payment->getOrder();

        $currencyCode = $fullOrder->getOrderCurrencyCode();
        $amount = $fullOrder->getGrandTotal();

        $amount = ['currency' => $currencyCode,
            'value' => $this->adyenHelper->formatAmount($amount, $currencyCode)];

        return [
            "amount" => $amount,
            "reference" => $order->getOrderIncrementId(),
            "fraudOffset" => "0"
        ];
    }
}