看起来像Firebase最近启用了它.我看到与我自己的自定义事件匹配的"in_app_purchase"事件于5月12日开始. 而且说明已在 https://support.google.com/firebase/answer上进行了更改/6317485?hl = zh_CN .

Looks like Firebase did enable it recently. I'm seeing "in_app_purchase" events matching my own custom event started ~May 12. And description was changed on https://support.google.com/firebase/answer/6317485?hl=en.

当用户完成应用内购买后，包括初始购买 订阅，由iTunes上的App Store或由 Google Play

when a user completes an in-app purchase, including an initial subscription, that is processed by the App Store on iTunes or by Google Play