Receipt Problem

We have some questions regarding the receipt fields:

  1. Our receipt validation refers to this document: Validating Receipts on the Device(https://developer.apple.com/documentation/appstorereceipts/validating_receipts_on_the_device). We would like to know if preorder receipts can also be validated using the methods outlined in the above document. If so, may I ask which ASN.1 Field Type corresponds to the preorder_date_ms?
  2. Additionally, we found other receipt fields in this document: Receipt Fields(https://developer.apple.com/library/archive/releasenotes/General/ValidateAppStoreReceipt/Chapters/ReceiptFields.html#//apple_ref/doc/uid/TP40010573-CH106-SW1). If possible, it would be appreciated if someone could supplement the definitions of each ASN.1 Field Type.
Receipt Problem
 
 
Q