Fetches all of the player's unconsumed purchases. The game must fetch the current player's purchases as soon as the client indicates that it is ready to perform payments-related operations, i.e. at game start. The game can then process and consume any purchases that are waiting to be consumed.
It makes an async call to the API, so the result isn't available immediately.
If they are successfully subscribed this plugin will emit the getpurchases
event along
with the purchase data.
If they cannot, i.e. it's not in the list of supported APIs, or the request
was rejected, it will emit a getpurchasesfail
event instead.
This Facebook Instant Games Plugin instance.