使用 in_app_purchase: ^0.3.5+1 包，我正在尝试验证用户在 iOS 上是否有活动订阅。
我可以得到productIDand transactionDate， with purchaseDetails.productID & purchaseDetails.transactionDate。但我似乎无法获得到期日期或状态。观看他们谈论“状态”堆的苹果视频。我不确定是否有人开始免费的 3 天试用，如果交易日期会知道他们是否取消，所以没有信心将所有事情都基于此交易日期。
我可以得到purchaseDetails.verificationData.localVerificationData，这似乎是一个 ANS1 字符串，这可能有更多信息，但我似乎无法解码它。有谁现在如何为 iOS 解码这个？或者知道另一种获取订阅状态的方法？
我试图不使用像 RevenueCat 这样的平台（因为他们削减了），但他们似乎提供了这样的功能。
下面是 ASN.1 字符串：
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