Eventing framework

[wooj-stripe]

Summary

Adds an eventing early preview of an eventing framework

Motivation

Analytics access to some events

Testing

Updated existing tests to accmodate for new metrics

Example Integration

Users would need to add @_spi

+ @_spi(MobilePaymentElementEventingBeta) import StripeCore

Add an Observer

+        NotificationCenter.default.addObserver(self,
+                                               selector: #selector(mobilePaymentElementNotification(notification:)),
+                                               name: .mobilePaymentElement, object: nil)

Define a callback function to receive notifications

+    @objc
+    func mobilePaymentElementNotification(notification: NSNotification) {
+        guard let mpeNotification = notification.object as? MobilePaymentElementEvent else {
+            return
+        }
+        print("Notification(eventName): \(mpeNotification.eventName)")
+        print("Notification(metadata): \(mpeNotification.metadata)")
+    }
+

Changelog

Will add when it is time to announce