commerce-8.x-2.8/modules/price/src/Resolver/DefaultPriceResolver.php

<?php

namespace Drupal\commerce_price\Resolver;

use Drupal\commerce\Context;
use Drupal\commerce\PurchasableEntityInterface;

/**
 * Returns the price based on the purchasable entity's price field.
 */
class DefaultPriceResolver implements PriceResolverInterface {

  /**
   * {@inheritdoc}
   */
  public function resolve(PurchasableEntityInterface $entity, $quantity, Context $context) {
    return $entity->getPrice();
  }

}