Magento 2 - Plugin

di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
  <!-- Plugin after/before/around DocBlock method description here -->
  <type name="Magento\Catalog\Model\Product">
    <plugin name="Vendor_Namespace_Plugin_Magento_Catalog_Model_Product"
            type="Vendor\Namespace\Plugin\Magento\Catalog\Model\Product"/>
  </type>
</config>

<!-- Plugin namespace is always unique using your module vendor & namespace as a prefix -->
<!-- Use the path and class-name of the original type as your /Plugin/ path -->
<!-- Just copy the path of your Plugin class en replace all forward slashes with underscores -->
<!-- Copy/paste the class method docblock as your Plugin description -->

Product.php

<?php

declare(strict_types=1);

namespace Vendor\Namespace\Plugin\Magento\Catalog\Model;

use Magento\Catalog\Model\Product as Subject;

/**
 * Class Product
 *
 * @package Vendor\Namespace\Plugin\Magento\Catalog\Model
 */
class Product
{
    public function beforeGetFinalPrice(Subject $subject, $qty = null): array
    {
        return [$qty];
    }

    public function aroundGetFinalprice(Subject $subject, callable $proceed)
    {
        return $proceed(); 
    }

    public function afterGetFinalPrice(Subject $subject, float $result): float
    {
        return $result; 
    }
}