Update name, ensure product_identifier gets passed

Author: ianrumac

Sources/SuperwallKit/Paywall/View Controller/Web View/Message Handling/PaywallMessage.swift

@@ -67,7 +67,7 @@ enum PaywallMessage: Decodable, Equatable {
 
   case transactionRestore
   case transactionStart
-  case transactionComplete(trialEndDate: Date?)
+  case transactionComplete(trialEndDate: Date?, productIdentifier: String)
   case transactionFail
   case transactionAbandon
   case transactionTimeout

Sources/SuperwallKit/Paywall/View Controller/Web View/Message Handling/PaywallMessageHandler.swift

@@ -122,13 +122,17 @@ final class PaywallMessageHandler: WebEventDelegate {
       Task {
         await self.pass(placement: transactionStart, from: paywall)
       }
-    case .transactionComplete(let trialEndDate):
-      let transactionComplete = SuperwallEventObjc.transactionComplete.description
+    case .transactionComplete(let trialEndDate, let productIdentifier):
+      let freeTrialStart = SuperwallEventObjc.freeTrialStart.description
       Task {
+        var payload: [String: Any] = ["product_identifier": productIdentifier]
+        if let trialEndDate {
+          payload["trial_end_date"] = Int(trialEndDate.timeIntervalSince1970 * 1000)
+        }
         await self.pass(
-          placement: transactionComplete,
+          placement: freeTrialStart,
           from: paywall,
-          payload: trialEndDate.map { ["trial_end_date": Int($0.timeIntervalSince1970 * 1000)] } ?? [:]
+          payload: payload
         )
       }
     case .transactionFail:

Sources/SuperwallKit/StoreKit/Transactions/TransactionManager.swift

@@ -900,7 +900,7 @@ final class TransactionManager {
       paywallInfo = await paywallViewController.info
       eventSource = .internal
       await paywallViewController.webView.messageHandler
-        .handle(.transactionComplete(trialEndDate: trialEndDate))
+        .handle(.transactionComplete(trialEndDate: trialEndDate, productIdentifier: product.productIdentifier))
     case .purchaseFunc,
       .observeFunc:
       paywallInfo = .empty()