Remove the fields which are not existing in the raw response from AppStore

appstore/model.go

@@ -5,7 +5,10 @@ type (
 	// The IAPRequest type has the request parameter
 	IAPRequest struct {
 		ReceiptData string `json:"receipt-data"`
+		// Only used for receipts that contain auto-renewable subscriptions.
 		Password string `json:"password,omitempty"`
+		// Only used for iOS7 style app receipts that contain auto-renewable or non-renewing subscriptions.
+		// If value is true, response includes only the latest renewal transaction for any subscriptions.
 		ExcludeOldTransactions bool `json:"exclude-old-transactions"`
 	}
 
@@ -57,16 +60,9 @@ type (
 		ProductID             string `json:"product_id"`
 		TransactionID         string `json:"transaction_id"`
 		OriginalTransactionID string `json:"original_transaction_id"`
-		AppItemID                 string `json:"app_item_id"`
-		VersionExternalIdentifier string `json:"version_external_identifier"`
 		WebOrderLineItemID    string `json:"web_order_line_item_id"`
 
 		IsTrialPeriod string `json:"is_trial_period"`
-		SubscriptionExpirationIntent   string `json:"expiration_intent"`
-		SubscriptionRetryFlag          string `json:"is_in_billing_retry_period"`
-		SubscriptionAutoRenewProductID string `json:"auto_renew_product_id"`
-		SubscriptionAutoRenewStatus    string `json:"auto_renew_status"`
-		SubscriptionPriceConsentStatus string `json:"price_consent_status"`
 		ExpiresDate
 
 		PurchaseDate