storekit

Implement in-app purchases, subscriptions, and paywalls using StoreKit 2 on iOS 26+. Use only the modern Product, Transaction, StoreView, and SubscriptionStoreView APIs. Never use the deprecated original StoreKit (SKProduct, SKPaymentQueue, SKStoreReviewController).

| Consumable | .consumable | Used once, can be repurchased (gems, coins) | | Non-consumable | .nonConsumable | Purchased once permanently (premium unlock) | | Auto-renewable | .autoRenewable | Recurring billing with automatic renewal | | Non-renewing | .nonRenewing | Time-limited access without automatic renewal |

Define product IDs as constants. Fetch products with Product.products(for:).

使用 StoreKit 2 实施、审查或改进应用内购买和订阅。使用 SubscriptionStoreView 或 ProductView 构建付费墙、使用产品和交易 API 处理交易、验证权利、处理购买流程（消费品、非消费品、自动续订）、实施优惠代码或促销/赢回/介绍性优惠、管理订阅状态和续订状态、使用配置文件设置 StoreKit 测试，或集成家庭共享、询问购买、退款处理和计费时使用重试逻辑。 来源：dpearson2699/swift-ios-skills。