commerce-8.x-2.8/modules/promotion/commerce_promotion.services.yml

services:
  plugin.manager.commerce_promotion_offer:
    class: Drupal\commerce_promotion\PromotionOfferManager
    arguments: ['@container.namespaces', '@cache.discovery', '@module_handler', '@entity_type.manager']

  commerce_promotion.promotion_order_processor:
    class: Drupal\commerce_promotion\PromotionOrderProcessor
    arguments: ['@entity_type.manager']
    tags:
      - { name: commerce_order.order_processor, priority: 100, adjustment_type: promotion }

  commerce_promotion.usage:
    class: Drupal\commerce_promotion\PromotionUsage
    arguments: ['@database']
    tags:
      - { name: backend_overridable }

  commerce_promotion.filter_conditions_subscriber:
    class: Drupal\commerce_promotion\EventSubscriber\FilterConditionsEventSubscriber
    tags:
      - { name: event_subscriber }

  commerce_promotion.order_subscriber:
    class: Drupal\commerce_promotion\EventSubscriber\OrderEventSubscriber
    arguments: ['@entity_type.manager', '@commerce_promotion.usage']
    tags:
      - { name: event_subscriber }

  commerce_promotion.coupon_code_generator:
    class: Drupal\commerce_promotion\CouponCodeGenerator
    arguments: ['@database']