FBSDKAppEventParameterNameOrderID is name for event parameter for both FBSDKAppEventNameSubscribe and FBSDKAppEventNameStartTrial events. Official documentation contains the following description for it.
/** Parameter key used to specify the unique ID for all events within a subscription
* in an FBSDKAppEventNameSubscribe or FBSDKAppEventNameStartTrial event. */
FOUNDATION_EXPORT NSString *const FBSDKAppEventParameterNameOrderID;
As for me, there are two meaningful things, which may be put in the subscription events:
- Original Transaction Identifier, which can be used by Facebook Analytics' backend to collapse all reported subscription renewals into a single real subscription.
- Transaction Identifier, which is unique for each new subscription and all its renewals. That is what Facebook Analytics SDK is looking for according to documentation, but less meaningful from a marketing point of view.
So what is the right value for FBSDKAppEventParameterNameOrderID parameter in FBSDKAppEventNameSubscribe/FBSDKAppEventNameStartTrial events?
