>In auto renewable subscription, what is the significance of purchase_date and original_purchase_date??
From :
https://developer.apple.com/library/content/releasenotes/General/ValidateAppStoreReceipt/Chapters/ReceiptFields.html
The date and time that the item was purchased.
[clip]
In an auto-renewable subscription receipt, this is always the date when the subscription was purchased or renewed, regardless of whether the transaction has been restored.
For a transaction that restores a previous transaction, the date of the original transaction.
[clip]
In an auto-renewable subscription receipt, this indicates the beginning of the subscription period, even if the subscription has been renewed.
-=-
Please be sure to listen to PBK's explanations otherwise - they freqently pick up where Apple leaves off, IMHO 😉
Ken