I've been using Google Wallet for handling our subscriptions for some months now. Everything seemed to work fine but I just found out that Google Wallet does not send subscription cancel confirmations any more when a user cancels the subscription. I still receive subscription success callbacks, but our server simply does not get any subscription cancel events. Now I have a bunch of active subscriptions on our end that are already cancelled in Google Wallet. As there is no way to query the subscription state I am totally lost. Is this is general or a temporary problem or has the wallet API been changed?
It was broken (at least in sandbox for me), but is now working again. You should get a SUBSCRIPTON_CANCELED failure postback if/when a user cancels his/her subscription.
My Sandbox buyer (I cancelled a subscription as a buyer) and got an email:
Here's the failure postback for it (sandbox ):
No, there is currently no way to find out if a subscription has been cancelled without manually looking at each order. See: https://stackoverflow.com/a/20556528/123444
来源：https://stackoverflow.com/questions/20515512/google-wallet-digital-goods-no-subscription-cancelled-callback