iap

type IAPReceipt_t struct {
	BundleID       string
	BundleIDHex    string
	BundleVersion  string
	OpaqueHex      string
	SHA1Hex        string
	CreationDate   string
	ExpirationData string `json:",omitempty"`
	Receipt        struct {
		Quantity            int
		ProductID           string
		TransactionID       string
		OriginTransactionID string `json:",omitempty"`
		PurchaseData        string
		OriginPurchaseData  string `json:",omitempty"`
	}
}

type ReceiptAttribute_t struct {
	Type    int
	Version int
	Value   []byte
}

type ReceiptFile_t struct {
	SignedData asn1.ObjectIdentifier
	Data       []struct {
		I23   int
		Set26 struct {
		} `asn1:"set,optional"`
		ContentSeq43 struct {
			Pkcs7_data  asn1.ObjectIdentifier
			ReceiptData [][]byte `asn1:"tag:0"`
		}
	} `asn1:"tag:0"` // whole data
}