This API has a similar usage to the consumeOwnedPurchase API of the IAP client.
When you use this API to confirm orders, the IAP server may have updated the product confirmation status but the IAP client not due to the cache mechanism of the IAP client, that is, the obtainOwnedPurchases API of the IAP client returns confirmed orders. In this case, when this API is used to send a confirmation request to the IAP server, you are advised to record the confirmation result to your server. Before confirming the order returned by the obtainOwnedPurchases API, you can check the confirmation status of the order on your server.