应用程序购买交易收据数据的存活时间有多长？
有谁知道应用程序购买数据在进行购买后在 transactionReceipt 变量中存在多长时间？我需要多快将其发送到我的 php 服务器来验证收据？
Does anybody know how long in app purchase data live in transactionReceipt variable after making purhcase? How fast i need to send it to my php server to verify the receipt?
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原则上，它永远有效。收据一般不会过期，特别是应用内购买收据永远不会过期。
It is, in principle, valid forever. Receipts don't expire in general, and in app purchase receipts specifically never expire.
IAP 没有任何过期日期，我相信您实际上不需要在服务器上验证收据。
如果您想在服务器上进行收据验证，那么您需要在购买时存储一些有关用户的信息。由于两个原因，它不能是 UDID。
1. UDID 已弃用。
2. 如果用户想在第二台设备上恢复，它将无法工作。
您可以做的是根据从 Apple 获得的收据创建唯一的收据。每张收据都有交易 ID 和日期，您可以从中创建密钥以跨多个设备识别用户。
IAP don't have any expiration date, and I believe you don't really need to verify the receipt on the server.
If you want to go through the receipt validation on server then you need to store some information about user at the time of purchase. which can not be the UDID because of two reason.
1. UDID is deprecated.
2. it will not work if user wants to restore on second device.
What you can do is create a unique from the receipt you get from Apple.Each receipt has transaction id and date you can create key out of it to identify user across multiple devices.