service.php

См. документацию.

<?php
 
namespace Bitrix\Seo\Checkout;

class Service implements IService
{
    public const GROUP = 'checkout';
    public const TYPE_YANDEX = 'yandex';
    public const TYPE_YOOKASSA = 'yookassa';
    public const TYPE_TBANK_BUSINESS = 'tbankbusiness';

    public static function getInstance(): static
    {
        static $instance = null;
        if ($instance === null)
        {
            $instance = new static();
        }
 
        return $instance;
    }

    public static function getEngineCode($type): string
    {
        return static::GROUP . '.' . $type;
    }

    public static function getTypes(): array
    {
        return [
            static::TYPE_YANDEX,
            static::TYPE_YOOKASSA,
            static::TYPE_TBANK_BUSINESS,
        ];
    }

    public static function getAuthAdapter($type): AuthAdapter
    {
        return AuthAdapter::create($type)->setService(static::getInstance());
    }
}