Push from command line

AvH Plan.xcodeproj/xcshareddata/xcschemes/AvH Plan.xcscheme

@@ -0,0 +1,111 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1020"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "A961337B2299867300B541D4"
+               BuildableName = "AvH Plan.app"
+               BlueprintName = "AvH Plan"
+               ReferencedContainer = "container:AvH Plan.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+         <TestableReference
+            skipped = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "A96133912299867A00B541D4"
+               BuildableName = "AvH PlanTests.xctest"
+               BlueprintName = "AvH PlanTests"
+               ReferencedContainer = "container:AvH Plan.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "A961339C2299867A00B541D4"
+               BuildableName = "AvH PlanUITests.xctest"
+               BlueprintName = "AvH PlanUITests"
+               ReferencedContainer = "container:AvH Plan.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "A961337B2299867300B541D4"
+            BuildableName = "AvH Plan.app"
+            BlueprintName = "AvH Plan"
+            ReferencedContainer = "container:AvH Plan.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Release"
+      selectedDebuggerIdentifier = ""
+      selectedLauncherIdentifier = "Xcode.IDEFoundation.Launcher.PosixSpawn"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "A961337B2299867300B541D4"
+            BuildableName = "AvH Plan.app"
+            BlueprintName = "AvH Plan"
+            ReferencedContainer = "container:AvH Plan.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "A961337B2299867300B541D4"
+            BuildableName = "AvH Plan.app"
+            BlueprintName = "AvH Plan"
+            ReferencedContainer = "container:AvH Plan.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

AvH Plan/AppDelegate.swift

@@ -19,25 +19,24 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
         
         FirebaseApp.configure()
         
-        if #available(iOS 10.0, *) {
+//        if #available(iOS 10.0, *) {
-            // For iOS 10 display notification (sent via APNS)
+//            // For iOS 10 display notification (sent via APNS)
-            UNUserNotificationCenter.current().delegate = self
+//            UNUserNotificationCenter.current().delegate = self
-            
+//
-            let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
+//            let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
-            UNUserNotificationCenter.current().requestAuthorization(
+//            UNUserNotificationCenter.current().requestAuthorization(
-                options: authOptions,
+//                options: authOptions,
-                completionHandler: {_, _ in })
+//                completionHandler: {_, _ in })
-        } else {
+//        } else {
-            let settings: UIUserNotificationSettings =
+//            let settings: UIUserNotificationSettings =
-                UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
+//                UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
-            application.registerUserNotificationSettings(settings)
+//            application.registerUserNotificationSettings(settings)
-        }
+//        }
+//
+//        application.registerForRemoteNotifications()
         
-        application.registerForRemoteNotifications()
+        Messaging.messaging().subscribe(toTopic: "substitutions-ios")
-        
+        Messaging.messaging().subscribe(toTopic: "substitutions-broadcast")
-        Messaging.messaging().subscribe(toTopic: "substitutions-ios") { error in
-            print("Subscribed to substitutions topic")
-        }
         return true
     }
 
@@ -62,43 +61,5 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
     func applicationWillTerminate(_ application: UIApplication) {
         // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
     }
-    
-    func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any]) {
-        // If you are receiving a notification message while your app is in the background,
-        // this callback will not be fired till the user taps on the notification launching the application.
-        // TODO: Handle data of notification
-        
-        // With swizzling disabled you must let Messaging know about the message, for Analytics
-        // Messaging.messaging().appDidReceiveMessage(userInfo)
-        
-        // Print message ID.
-        if let messageID = userInfo[gcmMessageIDKey] {
-            print("Message ID: \(messageID)")
-        }
-        
-        // Print full message.
-        print(userInfo)
-    }
-    
-    func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any],
-                     fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
-        // If you are receiving a notification message while your app is in the background,
-        // this callback will not be fired till the user taps on the notification launching the application.
-        // TODO: Handle data of notification
-        
-        // With swizzling disabled you must let Messaging know about the message, for Analytics
-        // Messaging.messaging().appDidReceiveMessage(userInfo)
-        
-        // Print message ID.
-        if let messageID = userInfo[gcmMessageIDKey] {
-            print("Message ID: \(messageID)")
-        }
-        
-        // Print full message.
-        print(userInfo)
-        
-        completionHandler(UIBackgroundFetchResult.newData)
-    }
-
 }
 

AvH Plan/ColourPickerView.swift

@@ -0,0 +1,127 @@
+//
+//  ColourPickerView.swift
+//  AvH Plan
+//
+//  Created by Deniz Duezgoeren on 19.07.19.
+//  Copyright © 2019 Deniz Duezgoeren. All rights reserved.
+//
+
+import UIKit
+import MagazineLayout
+
+class ColourPickerView: UIViewController, UICollectionViewDataSource, UICollectionViewDelegateMagazineLayout {
+    
+    let identifier = "colour-cell"
+    var course = ""
+    var currentIndexPath: IndexPath? = nil
+    var internalCourse = ""
+    @IBOutlet weak var toolbar: UINavigationBar!
+    let prefs = UserDefaults.standard
+    let df = DataFetcher.sharedInstance
+    var index = 0
+    var key = ""
+    @IBOutlet weak var collectionView: UICollectionView!
+    var previousSelected: IndexPath? = nil
+    var currentSelected: IndexPath? = nil
+    var selectedNewItem = false
+    
+    @IBAction func done(_ sender: UIBarButtonItem) {
+        prefs.set(currentSelected!.item, forKey: key) // index is used for the colour array in DataFetcher
+        let dict: [String: IndexPath] = ["indexPath": currentIndexPath!]
+        NotificationCenter.default.post(name: NSNotification.Name(rawValue: "load"), object: nil, userInfo: dict)
+        self.dismiss(animated: true, completion: nil)
+    }
+    
+    override func viewWillAppear(_ animated: Bool) {
+        super.viewWillAppear(animated)
+        key = "colour-index-\(internalCourse)"
+        
+        self.collectionView.register(UINib(nibName: "ColourViewCell", bundle: nil), forCellWithReuseIdentifier: identifier)
+    }
+    
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        index = prefs.integer(forKey: key)
+        self.toolbar!.topItem!.title = "\(course)"
+    }
+    
+    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
+        // For remove previously selection
+        if currentSelected != nil {
+            if let cell = collectionView.cellForItem(at: currentSelected!) as? ColourViewCell {
+                cell.imageView.image = UIImage(named: "ic_empty")
+            }
+        }
+        
+        if let cell = collectionView.cellForItem(at: indexPath) as? ColourViewCell {
+            cell.imageView.image = UIImage(named: "checkmark")
+        }
+        
+        currentSelected = indexPath
+        
+//        // For reload the selected cell
+        self.collectionView.reloadItems(at: [currentSelected!])
+    }
+    
+    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeModeForItemAt indexPath: IndexPath) -> MagazineLayoutItemSizeMode {
+        let widthMode = MagazineLayoutItemWidthMode.fullWidth(respectsHorizontalInsets: true)
+        let heightMode = MagazineLayoutItemHeightMode.static(height: 55)
+        return MagazineLayoutItemSizeMode(widthMode: widthMode, heightMode: heightMode)
+    }
+    
+    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, visibilityModeForHeaderInSectionAtIndex index: Int) -> MagazineLayoutHeaderVisibilityMode {
+        return .hidden
+    }
+    
+    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, visibilityModeForFooterInSectionAtIndex index: Int) -> MagazineLayoutFooterVisibilityMode {
+        return .hidden
+    }
+    
+    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, visibilityModeForBackgroundInSectionAtIndex index: Int) -> MagazineLayoutBackgroundVisibilityMode {
+        return .hidden
+    }
+    
+    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, horizontalSpacingForItemsInSectionAtIndex index: Int) -> CGFloat {
+        return 0
+    }
+    
+    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, verticalSpacingForElementsInSectionAtIndex index: Int) -> CGFloat {
+        return 0
+    }
+    
+    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetsForSectionAtIndex index: Int) -> UIEdgeInsets {
+        return UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
+    }
+    
+    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetsForItemsInSectionAtIndex index: Int) -> UIEdgeInsets {
+        return UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
+    }
+    
+    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
+        return self.df.getColourPalette().count
+    }
+    
+    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
+        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: identifier, for: indexPath as IndexPath) as! ColourViewCell
+        cell.label.text = self.df.getColourPaletteNames()[indexPath.item]
+        cell.colorView.layer.cornerRadius = cell.colorView.frame.height / 2
+        cell.colorView.backgroundColor = self.df.getColourPalette()[indexPath.item]
+        cell.backgroundColor = #colorLiteral(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)
+        cell.colorView.layer.borderWidth = 0.4
+        cell.colorView.layer.borderColor = #colorLiteral(red: 0.2549019754, green: 0.2745098174, blue: 0.3019607961, alpha: 1)
+        
+        if currentSelected == indexPath {
+            cell.imageView.image = UIImage(named: "checkmark")
+        } else {
+            cell.imageView.image = UIImage(named: "ic_empty")
+        }
+        
+        if !selectedNewItem, indexPath.item == prefs.integer(forKey: key) {
+            currentSelected = indexPath
+            cell.imageView.image = UIImage(named: "checkmark")
+            selectedNewItem = true
+        }
+        
+        return cell
+    }
+}

Pods/Firebase/CoreOnly/Sources/Firebase.h

@@ -0,0 +1,154 @@
+#import <FirebaseCore/FirebaseCore.h>
+
+#if !defined(__has_include)
+  #error "Firebase.h won't import anything if your compiler doesn't support __has_include. Please \
+          import the headers individually."
+#else
+  #if __has_include(<FirebaseAnalytics/FirebaseAnalytics.h>)
+    #import <FirebaseAnalytics/FirebaseAnalytics.h>
+  #endif
+
+  #if __has_include(<FirebaseAuth/FirebaseAuth.h>)
+    #import <FirebaseAuth/FirebaseAuth.h>
+  #endif
+
+  #if __has_include(<FirebaseDatabase/FirebaseDatabase.h>)
+    #import <FirebaseDatabase/FirebaseDatabase.h>
+  #endif
+
+  #if __has_include(<FirebaseDynamicLinks/FirebaseDynamicLinks.h>)
+    #import <FirebaseDynamicLinks/FirebaseDynamicLinks.h>
+    #if !__has_include(<FirebaseAnalytics/FirebaseAnalytics.h>)
+      #ifndef FIREBASE_ANALYTICS_SUPPRESS_WARNING
+        #warning "FirebaseAnalytics.framework is not included in your target. Please add \
+`Firebase/Analytics` to your Podfile or add FirebaseAnalytics.framework to your project to ensure \
+Firebase Dynamic Links works as intended."
+      #endif // #ifndef FIREBASE_ANALYTICS_SUPPRESS_WARNING
+    #endif
+  #endif
+
+  #if __has_include(<FirebaseFirestore/FirebaseFirestore.h>)
+    #import <FirebaseFirestore/FirebaseFirestore.h>
+  #endif
+
+  #if __has_include(<FirebaseFunctions/FirebaseFunctions.h>)
+    #import <FirebaseFunctions/FirebaseFunctions.h>
+  #endif
+
+  #if __has_include(<FirebaseInAppMessaging/FirebaseInAppMessaging.h>)
+    #import <FirebaseInAppMessaging/FirebaseInAppMessaging.h>
+    #if !__has_include(<FirebaseAnalytics/FirebaseAnalytics.h>)
+      #ifndef FIREBASE_ANALYTICS_SUPPRESS_WARNING
+        #warning "FirebaseAnalytics.framework is not included in your target. Please add \
+`Firebase/Analytics` to your Podfile or add FirebaseAnalytics.framework to your project to ensure \
+Firebase In App Messaging works as intended."
+      #endif // #ifndef FIREBASE_ANALYTICS_SUPPRESS_WARNING
+    #endif
+  #endif
+
+  #if __has_include(<FirebaseInstanceID/FirebaseInstanceID.h>)
+    #import <FirebaseInstanceID/FirebaseInstanceID.h>
+  #endif
+
+  #if __has_include(<FirebaseMessaging/FirebaseMessaging.h>)
+    #import <FirebaseMessaging/FirebaseMessaging.h>
+      #if !__has_include(<FirebaseAnalytics/FirebaseAnalytics.h>)
+      #ifndef FIREBASE_ANALYTICS_SUPPRESS_WARNING
+        #warning "FirebaseAnalytics.framework is not included in your target. Please add \
+`Firebase/Analytics` to your Podfile or add FirebaseAnalytics.framework to your project to ensure \
+Firebase Messaging works as intended."
+      #endif // #ifndef FIREBASE_ANALYTICS_SUPPRESS_WARNING
+    #endif
+#endif
+
+  #if __has_include(<FirebaseMLCommon/FirebaseMLCommon.h>)
+    #import <FirebaseMLCommon/FirebaseMLCommon.h>
+  #endif
+
+  #if __has_include(<FirebaseMLModelInterpreter/FirebaseMLModelInterpreter.h>)
+    #import <FirebaseMLModelInterpreter/FirebaseMLModelInterpreter.h>
+  #endif
+
+  #if __has_include(<FirebaseMLNLLanguageID/FirebaseMLNLLanguageID.h>)
+    #import <FirebaseMLNLLanguageID/FirebaseMLNLLanguageID.h>
+  #endif
+
+  #if __has_include(<FirebaseMLNLSmartReply/FirebaseMLNLSmartReply.h>)
+    #import <FirebaseMLNLSmartReply/FirebaseMLNLSmartReply.h>
+  #endif
+
+  #if __has_include(<FirebaseMLNLTranslate/FirebaseMLNLTranslate.h>)
+    #import <FirebaseMLNLTranslate/FirebaseMLNLTranslate.h>
+  #endif
+
+  #if __has_include(<FirebaseMLNaturalLanguage/FirebaseMLNaturalLanguage.h>)
+    #import <FirebaseMLNaturalLanguage/FirebaseMLNaturalLanguage.h>
+  #endif
+
+  #if __has_include(<FirebaseMLVision/FirebaseMLVision.h>)
+    #import <FirebaseMLVision/FirebaseMLVision.h>
+  #endif
+
+  #if __has_include(<FirebaseMLVisionAutoML/FirebaseMLVisionAutoML.h>)
+    #import <FirebaseMLVisionAutoML/FirebaseMLVisionAutoML.h>
+  #endif
+
+  #if __has_include(<FirebaseMLVisionBarcodeModel/FirebaseMLVisionBarcodeModel.h>)
+    #import <FirebaseMLVisionBarcodeModel/FirebaseMLVisionBarcodeModel.h>
+  #endif
+
+  #if __has_include(<FirebaseMLVisionFaceModel/FirebaseMLVisionFaceModel.h>)
+    #import <FirebaseMLVisionFaceModel/FirebaseMLVisionFaceModel.h>
+  #endif
+
+  #if __has_include(<FirebaseMLVisionLabelModel/FirebaseMLVisionLabelModel.h>)
+    #import <FirebaseMLVisionLabelModel/FirebaseMLVisionLabelModel.h>
+  #endif
+
+  #if __has_include(<FirebaseMLVisionObjectDetection/FirebaseMLVisionObjectDetection.h>)
+    #import <FirebaseMLVisionObjectDetection/FirebaseMLVisionObjectDetection.h>
+  #endif
+
+  #if __has_include(<FirebaseMLVisionTextModel/FirebaseMLVisionTextModel.h>)
+    #import <FirebaseMLVisionTextModel/FirebaseMLVisionTextModel.h>
+  #endif
+
+  #if __has_include(<FirebasePerformance/FirebasePerformance.h>)
+    #import <FirebasePerformance/FirebasePerformance.h>
+    #if !__has_include(<FirebaseAnalytics/FirebaseAnalytics.h>)
+      #ifndef FIREBASE_ANALYTICS_SUPPRESS_WARNING
+        #warning "FirebaseAnalytics.framework is not included in your target. Please add \
+`Firebase/Analytics` to your Podfile or add FirebaseAnalytics.framework to your project to ensure \
+Firebase Performance works as intended."
+      #endif // #ifndef FIREBASE_ANALYTICS_SUPPRESS_WARNING
+    #endif
+  #endif
+
+  #if __has_include(<FirebaseRemoteConfig/FirebaseRemoteConfig.h>)
+    #import <FirebaseRemoteConfig/FirebaseRemoteConfig.h>
+    #if !__has_include(<FirebaseAnalytics/FirebaseAnalytics.h>)
+      #ifndef FIREBASE_ANALYTICS_SUPPRESS_WARNING
+        #warning "FirebaseAnalytics.framework is not included in your target. Please add \
+`Firebase/Analytics` to your Podfile or add FirebaseAnalytics.framework to your project to ensure \
+Firebase Remote Config works as intended."
+      #endif // #ifndef FIREBASE_ANALYTICS_SUPPRESS_WARNING
+    #endif
+  #endif
+
+  #if __has_include(<FirebaseStorage/FirebaseStorage.h>)
+    #import <FirebaseStorage/FirebaseStorage.h>
+  #endif
+
+  #if __has_include(<GoogleMobileAds/GoogleMobileAds.h>)
+    #import <GoogleMobileAds/GoogleMobileAds.h>
+  #endif
+
+  #if __has_include(<Fabric/Fabric.h>)
+    #import <Fabric/Fabric.h>
+  #endif
+
+  #if __has_include(<Crashlytics/Crashlytics.h>)
+    #import <Crashlytics/Crashlytics.h>
+  #endif
+
+#endif  // defined(__has_include)

Pods/Firebase/CoreOnly/Sources/module.modulemap

@@ -0,0 +1,4 @@
+module Firebase {
+  export *
+  header "Firebase.h"
+}

Pods/Firebase/README.md

@@ -0,0 +1,93 @@
+# Firebase APIs for iOS
+
+Simplify your iOS development, grow your user base, and monetize more
+effectively with Firebase services.
+
+Much more information can be found at [https://firebase.google.com](https://firebase.google.com).
+
+## Install a Firebase SDK using CocoaPods
+
+Firebase distributes several iOS specific APIs and SDKs via CocoaPods.
+You can install the CocoaPods tool on OS X by running the following command from
+the terminal. Detailed information is available in the [Getting Started
+guide](https://guides.cocoapods.org/using/getting-started.html#getting-started).
+
+```
+$ sudo gem install cocoapods
+```
+
+## Try out an SDK
+
+You can try any of the SDKs with `pod try`. Run the following command and select
+the SDK you are interested in when prompted:
+
+```
+$ pod try Firebase
+```
+
+Note that some SDKs may require credentials. More information is available in
+the SDK-specific documentation at [https://firebase.google.com/docs/](https://firebase.google.com/docs/).
+
+## Add a Firebase SDK to your iOS app
+
+CocoaPods is used to install and manage dependencies in existing Xcode projects.
+
+1.  Create an Xcode project, and save it to your local machine.
+2.  Create a file named `Podfile` in your project directory. This file defines
+    your project's dependencies, and is commonly referred to as a Podspec.
+3.  Open `Podfile`, and add your dependencies. A simple Podspec is shown here:
+
+    ```
+    platform :ios, '8.0'
+    pod 'Firebase'
+    ```
+
+4.  Save the file.
+
+5.  Open a terminal and `cd` to the directory containing the Podfile.
+
+    ```
+    $ cd <path-to-project>/project/
+    ```
+
+6.  Run the `pod install` command. This will install the SDKs specified in the
+    Podspec, along with any dependencies they may have.
+
+    ```
+    $ pod install
+    ```
+
+7.  Open your app's `.xcworkspace` file to launch Xcode. Use this file for all
+    development on your app.
+
+8.  You can also install other Firebase SDKs by adding the subspecs in the
+    Podfile.
+
+    ```
+    pod 'Firebase/AdMob'
+    pod 'Firebase/Analytics'
+    pod 'Firebase/Auth'
+    pod 'Firebase/Database'
+    pod 'Firebase/DynamicLinks'
+    pod 'Firebase/Firestore'
+    pod 'Firebase/Functions'
+    pod 'Firebase/InAppMessaging'
+    pod 'Firebase/InAppMessagingDisplay'
+    pod 'Firebase/Messaging'
+    pod 'Firebase/MLCommon'
+    pod 'Firebase/MLModelInterpreter'
+    pod 'Firebase/MLNLLanguageID'
+    pod 'Firebase/MLNLSmartReply'
+    pod 'Firebase/MLNLTranslate'
+    pod 'Firebase/MLNaturalLanguage'
+    pod 'Firebase/MLVision'
+    pod 'Firebase/MLVisionAutoML'
+    pod 'Firebase/MLVisionBarcodeModel'
+    pod 'Firebase/MLVisionFaceModel'
+    pod 'Firebase/MLVisionLabelModel'
+    pod 'Firebase/MLVisionObjectDetection'
+    pod 'Firebase/MLVisionTextModel'
+    pod 'Firebase/Performance'
+    pod 'Firebase/RemoteConfig'
+    pod 'Firebase/Storage'
+    ```

Pods/FirebaseAnalyticsInterop/Interop/Analytics/Public/FIRAnalyticsInterop.h

@@ -0,0 +1,60 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+@protocol FIRAnalyticsInteropListener;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/// Connector for bridging communication between Firebase SDKs and FirebaseAnalytics API.
+@protocol FIRAnalyticsInterop
+
+/// Sets user property when trigger event is logged. This API is only available in the SDK.
+- (void)setConditionalUserProperty:(NSDictionary<NSString *, id> *)conditionalUserProperty;
+
+/// Clears user property if set.
+- (void)clearConditionalUserProperty:(NSString *)userPropertyName
+                           forOrigin:(NSString *)origin
+                      clearEventName:(NSString *)clearEventName
+                clearEventParameters:(NSDictionary<NSString *, NSString *> *)clearEventParameters;
+
+/// Returns currently set user properties.
+- (NSArray<NSDictionary<NSString *, NSString *> *> *)conditionalUserProperties:(NSString *)origin
+                                                            propertyNamePrefix:
+                                                                (NSString *)propertyNamePrefix;
+
+/// Returns the maximum number of user properties.
+- (NSInteger)maxUserProperties:(NSString *)origin;
+
+/// Logs events.
+- (void)logEventWithOrigin:(NSString *)origin
+                      name:(NSString *)name
+                parameters:(nullable NSDictionary<NSString *, id> *)parameters;
+
+/// Sets user property.
+- (void)setUserPropertyWithOrigin:(NSString *)origin name:(NSString *)name value:(id)value;
+
+/// Registers an Analytics listener for the given origin.
+- (void)registerAnalyticsListener:(id<FIRAnalyticsInteropListener>)listener
+                       withOrigin:(NSString *)origin;
+
+/// Unregisters an Analytics listener for the given origin.
+- (void)unregisterAnalyticsListenerWithOrigin:(NSString *)origin;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseAnalyticsInterop/Interop/Analytics/Public/FIRAnalyticsInteropListener.h

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/// Handles events and messages from Analytics.
+@protocol FIRAnalyticsInteropListener <NSObject>
+
+/// Triggers when an Analytics event happens for the registered origin with
+/// `FIRAnalyticsInterop`s `registerAnalyticsListener:withOrigin:`.
+- (void)messageTriggered:(NSString *)name parameters:(NSDictionary *)parameters;
+
+@end

Pods/FirebaseAnalyticsInterop/Interop/Analytics/Public/FIRInteropEventNames.h

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/// @file FIRInteropEventNames.h
+
+#import <Foundation/Foundation.h>
+
+/// Notification open event name.
+static NSString *const kFIRIEventNotificationOpen = @"_no";
+
+/// Notification foreground event name.
+static NSString *const kFIRIEventNotificationForeground = @"_nf";
+
+/// Campaign event name.
+static NSString *const kFIRIEventFirebaseCampaign = @"_cmp";

Pods/FirebaseAnalyticsInterop/Interop/Analytics/Public/FIRInteropParameterNames.h

@@ -0,0 +1,73 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+/// @file FIRInteropParameterNames.h
+///
+/// Predefined event parameter names used by Firebase. This file is a subset of the
+/// FirebaseAnalytics FIRParameterNames.h public header.
+///
+/// The origin of your traffic, such as an Ad network (for example, google) or partner (urban
+/// airship). Identify the advertiser, site, publication, etc. that is sending traffic to your
+/// property. Highly recommended (NSString).
+/// <pre>
+///     NSDictionary *params = @{
+///       kFIRParameterSource : @"InMobi",
+///       // ...
+///     };
+/// </pre>
+static NSString *const kFIRIParameterSource NS_SWIFT_NAME(AnalyticsParameterSource) = @"source";
+
+/// The advertising or marketing medium, for example: cpc, banner, email, push. Highly recommended
+/// (NSString).
+/// <pre>
+///     NSDictionary *params = @{
+///       kFIRParameterMedium : @"email",
+///       // ...
+///     };
+/// </pre>
+static NSString *const kFIRIParameterMedium NS_SWIFT_NAME(AnalyticsParameterMedium) = @"medium";
+
+/// The individual campaign name, slogan, promo code, etc. Some networks have pre-defined macro to
+/// capture campaign information, otherwise can be populated by developer. Highly Recommended
+/// (NSString).
+/// <pre>
+///     NSDictionary *params = @{
+///       kFIRParameterCampaign : @"winter_promotion",
+///       // ...
+///     };
+/// </pre>
+static NSString *const kFIRIParameterCampaign NS_SWIFT_NAME(AnalyticsParameterCampaign) =
+    @"campaign";
+
+/// Message identifier.
+static NSString *const kFIRIParameterMessageIdentifier = @"_nmid";
+
+/// Message name.
+static NSString *const kFIRIParameterMessageName = @"_nmn";
+
+/// Message send time.
+static NSString *const kFIRIParameterMessageTime = @"_nmt";
+
+/// Message device time.
+static NSString *const kFIRIParameterMessageDeviceTime = @"_ndt";
+
+/// Topic message.
+static NSString *const kFIRIParameterTopic = @"_nt";
+
+/// Stores the message_id of the last notification opened by the app.
+static NSString *const kFIRIUserPropertyLastNotification = @"_ln";

Pods/FirebaseAnalyticsInterop/LICENSE

@@ -0,0 +1,202 @@
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Pods/FirebaseAnalyticsInterop/README.md

@@ -0,0 +1,223 @@
+# Firebase iOS Open Source Development [![Build Status](https://travis-ci.org/firebase/firebase-ios-sdk.svg?branch=master)](https://travis-ci.org/firebase/firebase-ios-sdk)
+
+This repository contains a subset of the Firebase iOS SDK source. It currently
+includes FirebaseCore, FirebaseAuth, FirebaseDatabase, FirebaseFirestore,
+FirebaseFunctions, FirebaseInstanceID, FirebaseInAppMessaging,
+FirebaseInAppMessagingDisplay, FirebaseMessaging and FirebaseStorage.
+
+The repository also includes GoogleUtilities source. The
+[GoogleUtilities](GoogleUtilities/README.md) pod is
+a set of utilities used by Firebase and other Google products.
+
+Firebase is an app development platform with tools to help you build, grow and
+monetize your app. More information about Firebase can be found at
+[https://firebase.google.com](https://firebase.google.com).
+
+## Installation
+
+See the three subsections for details about three different installation methods.
+1. [Standard pod install](README.md#standard-pod-install)
+1. [Installing from the GitHub repo](README.md#installing-from-github)
+1. [Experimental Carthage](README.md#carthage-ios-only)
+
+### Standard pod install
+
+Go to
+[https://firebase.google.com/docs/ios/setup](https://firebase.google.com/docs/ios/setup).
+
+### Installing from GitHub
+
+For releases starting with 5.0.0, the source for each release is also deployed
+to CocoaPods master and available via standard
+[CocoaPods Podfile syntax](https://guides.cocoapods.org/syntax/podfile.html#pod).
+
+These instructions can be used to access the Firebase repo at other branches,
+tags, or commits.
+
+#### Background
+
+See
+[the Podfile Syntax Reference](https://guides.cocoapods.org/syntax/podfile.html#pod)
+for instructions and options about overriding pod source locations.
+
+#### Accessing Firebase Source Snapshots
+
+All of the official releases are tagged in this repo and available via CocoaPods. To access a local
+source snapshot or unreleased branch, use Podfile directives like the following:
+
+To access FirebaseFirestore via a branch:
+```
+pod 'FirebaseCore', :git => 'https://github.com/firebase/firebase-ios-sdk.git', :branch => 'master'
+pod 'FirebaseFirestore', :git => 'https://github.com/firebase/firebase-ios-sdk.git', :branch => 'master'
+```
+
+To access FirebaseMessaging via a checked out version of the firebase-ios-sdk repo do:
+
+```
+pod 'FirebaseCore', :path => '/path/to/firebase-ios-sdk'
+pod 'FirebaseMessaging', :path => '/path/to/firebase-ios-sdk'
+```
+
+### Carthage (iOS only)
+
+Instructions for the experimental Carthage distribution are at
+[Carthage](Carthage.md).
+
+### Rome
+
+Instructions for installing binary frameworks via
+[Rome](https://github.com/CocoaPods/Rome) are at [Rome](Rome.md).
+
+## Development
+
+To develop Firebase software in this repository, ensure that you have at least
+the following software:
+
+  * Xcode 10.1 (or later)
+  * CocoaPods 1.7.2 (or later)
+
+For the pod that you want to develop:
+
+`pod gen Firebase{name here}.podspec --local-sources=./ --auto-open`
+
+Firestore and Functions have self contained Xcode projects. See
+[Firestore/README.md](Firestore/README.md) and
+[Functions/README.md](Functions/README.md).
+
+### Adding a New Firebase Pod
+
+See [AddNewPod.md](AddNewPod.md).
+
+### Code Formatting
+
+To ensure that the code is formatted consistently, run the script
+[./scripts/style.sh](https://github.com/firebase/firebase-ios-sdk/blob/master/scripts/style.sh)
+before creating a PR.
+
+Travis will verify that any code changes are done in a style compliant way. Install
+`clang-format` and `swiftformat`.
+These commands will get the right versions:
+
+```
+brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/773cb75d360b58f32048f5964038d09825a507c8/Formula/clang-format.rb
+brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/3dfea1004e0736754bbf49673cca8aaed8a94089/Formula/swiftformat.rb
+```
+
+Note: if you already have a newer version of these installed you may need to
+`brew switch` to this version.
+
+### Running Unit Tests
+
+Select a scheme and press Command-u to build a component and run its unit tests.
+
+#### Viewing Code Coverage
+
+First, make sure that [xcov](https://github.com/nakiostudio/xcov) is installed with `gem install xcov`.
+
+After running the `AllUnitTests_iOS` scheme in Xcode, execute
+`xcov --workspace Firebase.xcworkspace --scheme AllUnitTests_iOS --output_directory xcov_output`
+at Example/ in the terminal. This will aggregate the coverage, and you can run `open xcov_output/index.html` to see the results.
+
+### Running Sample Apps
+In order to run the sample apps and integration tests, you'll need valid
+`GoogleService-Info.plist` files for those samples. The Firebase Xcode project contains dummy plist
+files without real values, but can be replaced with real plist files. To get your own
+`GoogleService-Info.plist` files:
+
+1. Go to the [Firebase Console](https://console.firebase.google.com/)
+2. Create a new Firebase project, if you don't already have one
+3. For each sample app you want to test, create a new Firebase app with the sample app's bundle
+identifier (e.g. `com.google.Database-Example`)
+4. Download the resulting `GoogleService-Info.plist` and replace the appropriate dummy plist file
+(e.g. in [Example/Database/App/](Example/Database/App/));
+
+Some sample apps like Firebase Messaging ([Example/Messaging/App](Example/Messaging/App)) require
+special Apple capabilities, and you will have to change the sample app to use a unique bundle
+identifier that you can control in your own Apple Developer account.
+
+## Specific Component Instructions
+See the sections below for any special instructions for those components.
+
+### Firebase Auth
+
+If you're doing specific Firebase Auth development, see
+[the Auth Sample README](Example/Auth/README.md) for instructions about
+building and running the FirebaseAuth pod along with various samples and tests.
+
+### Firebase Database
+
+To run the Database Integration tests, make your database authentication rules
+[public](https://firebase.google.com/docs/database/security/quickstart).
+
+### Firebase Storage
+
+To run the Storage Integration tests, follow the instructions in
+[FIRStorageIntegrationTests.m](Example/Storage/Tests/Integration/FIRStorageIntegrationTests.m).
+
+#### Push Notifications
+
+Push notifications can only be delivered to specially provisioned App IDs in the developer portal.
+In order to actually test receiving push notifications, you will need to:
+
+1. Change the bundle identifier of the sample app to something you own in your Apple Developer
+account, and enable that App ID for push notifications.
+2. You'll also need to
+[upload your APNs Provider Authentication Key or certificate to the Firebase Console](https://firebase.google.com/docs/cloud-messaging/ios/certs)
+at **Project Settings > Cloud Messaging > [Your Firebase App]**.
+3. Ensure your iOS device is added to your Apple Developer portal as a test device.
+
+#### iOS Simulator
+
+The iOS Simulator cannot register for remote notifications, and will not receive push notifications.
+In order to receive push notifications, you'll have to follow the steps above and run the app on a
+physical device.
+
+## Community Supported Efforts
+
+We've seen an amazing amount of interest and contributions to improve the Firebase SDKs, and we are
+very grateful!  We'd like to empower as many developers as we can to be able to use Firebase and
+participate in the Firebase community.
+
+### macOS and tvOS
+Thanks to contributions from the community, FirebaseAuth, FirebaseCore, FirebaseDatabase, FirebaseMessaging,
+FirebaseFirestore, FirebaseFunctions and FirebaseStorage now compile, run unit tests, and work on
+macOS and tvOS.
+
+For tvOS, checkout the [Sample](Example/tvOSSample).
+
+Keep in mind that macOS and tvOS are not officially supported by Firebase, and this repository is
+actively developed primarily for iOS. While we can catch basic unit test issues with Travis, there
+may be some changes where the SDK no longer works as expected on macOS or tvOS. If you encounter
+this, please [file an issue](https://github.com/firebase/firebase-ios-sdk/issues).
+
+Note that the Firebase pod is not available for macOS and tvOS.
+
+To install, add a subset of the following to the Podfile:
+
+```
+pod 'FirebaseAuth'
+pod 'FirebaseCore'
+pod 'FirebaseDatabase'
+pod 'FirebaseFirestore'
+pod 'FirebaseFunctions'
+pod 'FirebaseMessaging'
+pod 'FirebaseStorage'
+```
+
+## Roadmap
+
+See [Roadmap](ROADMAP.md) for more about the Firebase iOS SDK Open Source
+plans and directions.
+
+## Contributing
+
+See [Contributing](CONTRIBUTING.md) for more information on contributing to the Firebase
+iOS SDK.
+
+## License
+
+The contents of this repository is licensed under the
+[Apache License, version 2.0](http://www.apache.org/licenses/LICENSE-2.0).
+
+Your use of Firebase is governed by the
+[Terms of Service for Firebase Services](https://firebase.google.com/terms/).

Pods/FirebaseCore/Firebase/Core/FIRAnalyticsConfiguration.m

@@ -0,0 +1,62 @@
+// Copyright 2017 Google
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import <Foundation/Foundation.h>
+
+#import "Private/FIRAnalyticsConfiguration.h"
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-implementations"
+@implementation FIRAnalyticsConfiguration
+#pragma clang diagnostic pop
+
++ (FIRAnalyticsConfiguration *)sharedInstance {
+  static FIRAnalyticsConfiguration *sharedInstance = nil;
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    sharedInstance = [[FIRAnalyticsConfiguration alloc] init];
+  });
+  return sharedInstance;
+}
+
+- (void)postNotificationName:(NSString *)name value:(id)value {
+  if (!name.length || !value) {
+    return;
+  }
+  [[NSNotificationCenter defaultCenter] postNotificationName:name
+                                                      object:self
+                                                    userInfo:@{name : value}];
+}
+
+- (void)setAnalyticsCollectionEnabled:(BOOL)analyticsCollectionEnabled {
+  [self setAnalyticsCollectionEnabled:analyticsCollectionEnabled persistSetting:YES];
+}
+
+- (void)setAnalyticsCollectionEnabled:(BOOL)analyticsCollectionEnabled
+                       persistSetting:(BOOL)shouldPersist {
+  // Persist the measurementEnabledState. Use FIRAnalyticsEnabledState values instead of YES/NO.
+  FIRAnalyticsEnabledState analyticsEnabledState =
+      analyticsCollectionEnabled ? kFIRAnalyticsEnabledStateSetYes : kFIRAnalyticsEnabledStateSetNo;
+  if (shouldPersist) {
+    NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
+    [userDefaults setObject:@(analyticsEnabledState)
+                     forKey:kFIRAPersistedConfigMeasurementEnabledStateKey];
+    [userDefaults synchronize];
+  }
+
+  [self postNotificationName:kFIRAnalyticsConfigurationSetEnabledNotification
+                       value:@(analyticsCollectionEnabled)];
+}
+
+@end

Pods/FirebaseCore/Firebase/Core/FIRApp.m

@@ -0,0 +1,836 @@
+// Copyright 2017 Google
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <sys/utsname.h>
+
+#if __has_include(<UIKit/UIKit.h>)
+#import <UIKit/UIKit.h>
+#endif
+
+#if __has_include(<AppKit/AppKit.h>)
+#import <AppKit/AppKit.h>
+#endif
+
+#import "FIRApp.h"
+
+#import "Private/FIRAnalyticsConfiguration.h"
+#import "Private/FIRAppInternal.h"
+#import "Private/FIRBundleUtil.h"
+#import "Private/FIRComponentContainerInternal.h"
+#import "Private/FIRConfigurationInternal.h"
+#import "Private/FIRCoreDiagnosticsConnector.h"
+#import "Private/FIRLibrary.h"
+#import "Private/FIRLogger.h"
+#import "Private/FIROptionsInternal.h"
+
+// The kFIRService strings are only here while transitioning CoreDiagnostics from the Analytics
+// pod to a Core dependency. These symbols are not used and should be deleted after the transition.
+NSString *const kFIRServiceAdMob;
+NSString *const kFIRServiceAuth;
+NSString *const kFIRServiceAuthUI;
+NSString *const kFIRServiceCrash;
+NSString *const kFIRServiceDatabase;
+NSString *const kFIRServiceDynamicLinks;
+NSString *const kFIRServiceFirestore;
+NSString *const kFIRServiceFunctions;
+NSString *const kFIRServiceInstanceID;
+NSString *const kFIRServiceInvites;
+NSString *const kFIRServiceMessaging;
+NSString *const kFIRServiceMeasurement;
+NSString *const kFIRServicePerformance;
+NSString *const kFIRServiceRemoteConfig;
+NSString *const kFIRServiceStorage;
+NSString *const kGGLServiceAnalytics;
+NSString *const kGGLServiceSignIn;
+
+NSString *const kFIRDefaultAppName = @"__FIRAPP_DEFAULT";
+NSString *const kFIRAppReadyToConfigureSDKNotification = @"FIRAppReadyToConfigureSDKNotification";
+NSString *const kFIRAppDeleteNotification = @"FIRAppDeleteNotification";
+NSString *const kFIRAppIsDefaultAppKey = @"FIRAppIsDefaultAppKey";
+NSString *const kFIRAppNameKey = @"FIRAppNameKey";
+NSString *const kFIRGoogleAppIDKey = @"FIRGoogleAppIDKey";
+
+NSString *const kFIRGlobalAppDataCollectionEnabledDefaultsKeyFormat =
+    @"/google/firebase/global_data_collection_enabled:%@";
+NSString *const kFIRGlobalAppDataCollectionEnabledPlistKey =
+    @"FirebaseDataCollectionDefaultEnabled";
+
+NSString *const kFIRAppDiagnosticsNotification = @"FIRAppDiagnosticsNotification";
+
+NSString *const kFIRAppDiagnosticsConfigurationTypeKey = @"ConfigType";
+NSString *const kFIRAppDiagnosticsErrorKey = @"Error";
+NSString *const kFIRAppDiagnosticsFIRAppKey = @"FIRApp";
+NSString *const kFIRAppDiagnosticsSDKNameKey = @"SDKName";
+NSString *const kFIRAppDiagnosticsSDKVersionKey = @"SDKVersion";
+
+// Auth internal notification notification and key.
+NSString *const FIRAuthStateDidChangeInternalNotification =
+    @"FIRAuthStateDidChangeInternalNotification";
+NSString *const FIRAuthStateDidChangeInternalNotificationAppKey =
+    @"FIRAuthStateDidChangeInternalNotificationAppKey";
+NSString *const FIRAuthStateDidChangeInternalNotificationTokenKey =
+    @"FIRAuthStateDidChangeInternalNotificationTokenKey";
+NSString *const FIRAuthStateDidChangeInternalNotificationUIDKey =
+    @"FIRAuthStateDidChangeInternalNotificationUIDKey";
+
+/**
+ * The URL to download plist files.
+ */
+static NSString *const kPlistURL = @"https://console.firebase.google.com/";
+
+/**
+ * An array of all classes that registered as `FIRCoreConfigurable` in order to receive lifecycle
+ * events from Core.
+ */
+static NSMutableArray<Class<FIRLibrary>> *sRegisteredAsConfigurable;
+
+@interface FIRApp ()
+
+#ifdef DEBUG
+@property(nonatomic) BOOL alreadyOutputDataCollectionFlag;
+#endif  // DEBUG
+
+@end
+
+@implementation FIRApp
+
+// This is necessary since our custom getter prevents `_options` from being created.
+@synthesize options = _options;
+
+static NSMutableDictionary *sAllApps;
+static FIRApp *sDefaultApp;
+static NSMutableDictionary *sLibraryVersions;
+
++ (void)configure {
+  FIROptions *options = [FIROptions defaultOptions];
+  if (!options) {
+    [NSException raise:kFirebaseCoreErrorDomain
+                format:@"`[FIRApp configure];` (`FirebaseApp.configure()` in Swift) could not find "
+                       @"a valid GoogleService-Info.plist in your project. Please download one "
+                       @"from %@.",
+                       kPlistURL];
+  }
+  [FIRApp configureWithOptions:options];
+#if TARGET_OS_OSX || TARGET_OS_TV
+  FIRLogNotice(kFIRLoggerCore, @"I-COR000028",
+               @"tvOS and macOS SDK support is not part of the official Firebase product. "
+               @"Instead they are community supported. Details at "
+               @"https://github.com/firebase/firebase-ios-sdk/blob/master/README.md.");
+#endif
+}
+
++ (void)configureWithOptions:(FIROptions *)options {
+  if (!options) {
+    [NSException raise:kFirebaseCoreErrorDomain
+                format:@"Options is nil. Please pass a valid options."];
+  }
+  [FIRApp configureWithName:kFIRDefaultAppName options:options];
+}
+
++ (NSCharacterSet *)applicationNameAllowedCharacters {
+  static NSCharacterSet *applicationNameAllowedCharacters;
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    NSMutableCharacterSet *allowedNameCharacters = [NSMutableCharacterSet alphanumericCharacterSet];
+    [allowedNameCharacters addCharactersInString:@"-_"];
+    applicationNameAllowedCharacters = [allowedNameCharacters copy];
+  });
+  return applicationNameAllowedCharacters;
+}
+
++ (void)configureWithName:(NSString *)name options:(FIROptions *)options {
+  if (!name || !options) {
+    [NSException raise:kFirebaseCoreErrorDomain format:@"Neither name nor options can be nil."];
+  }
+  if (name.length == 0) {
+    [NSException raise:kFirebaseCoreErrorDomain format:@"Name cannot be empty."];
+  }
+
+  if ([name isEqualToString:kFIRDefaultAppName]) {
+    if (sDefaultApp) {
+      [NSException raise:kFirebaseCoreErrorDomain
+                  format:@"Default app has already been configured."];
+    }
+
+    FIRLogDebug(kFIRLoggerCore, @"I-COR000001", @"Configuring the default app.");
+  } else {
+    // Validate the app name and ensure it hasn't been configured already.
+    NSCharacterSet *nameCharacters = [NSCharacterSet characterSetWithCharactersInString:name];
+
+    if (![[self applicationNameAllowedCharacters] isSupersetOfSet:nameCharacters]) {
+      [NSException raise:kFirebaseCoreErrorDomain
+                  format:@"App name can only contain alphanumeric, "
+                         @"hyphen (-), and underscore (_) characters"];
+    }
+
+    @synchronized(self) {
+      if (sAllApps && sAllApps[name]) {
+        [NSException raise:kFirebaseCoreErrorDomain
+                    format:@"App named %@ has already been configured.", name];
+      }
+    }
+
+    FIRLogDebug(kFIRLoggerCore, @"I-COR000002", @"Configuring app named %@", name);
+  }
+
+  @synchronized(self) {
+    FIRApp *app = [[FIRApp alloc] initInstanceWithName:name options:options];
+    if (app.isDefaultApp) {
+      sDefaultApp = app;
+    }
+
+    [FIRApp addAppToAppDictionary:app];
+    [FIRApp sendNotificationsToSDKs:app];
+  }
+}
+
++ (FIRApp *)defaultApp {
+  if (sDefaultApp) {
+    return sDefaultApp;
+  }
+  FIRLogError(kFIRLoggerCore, @"I-COR000003",
+              @"The default Firebase app has not yet been "
+              @"configured. Add `[FIRApp configure];` (`FirebaseApp.configure()` in Swift) to your "
+              @"application initialization. Read more: https://goo.gl/ctyzm8.");
+  return nil;
+}
+
++ (FIRApp *)appNamed:(NSString *)name {
+  @synchronized(self) {
+    if (sAllApps) {
+      FIRApp *app = sAllApps[name];
+      if (app) {
+        return app;
+      }
+    }
+    FIRLogError(kFIRLoggerCore, @"I-COR000004", @"App with name %@ does not exist.", name);
+    return nil;
+  }
+}
+
++ (NSDictionary *)allApps {
+  @synchronized(self) {
+    if (!sAllApps) {
+      FIRLogError(kFIRLoggerCore, @"I-COR000005", @"No app has been configured yet.");
+    }
+    return [sAllApps copy];
+  }
+}
+
+// Public only for tests
++ (void)resetApps {
+  @synchronized(self) {
+    sDefaultApp = nil;
+    [sAllApps removeAllObjects];
+    sAllApps = nil;
+    [sLibraryVersions removeAllObjects];
+    sLibraryVersions = nil;
+  }
+}
+
+- (void)deleteApp:(FIRAppVoidBoolCallback)completion {
+  @synchronized([self class]) {
+    if (sAllApps && sAllApps[self.name]) {
+      FIRLogDebug(kFIRLoggerCore, @"I-COR000006", @"Deleting app named %@", self.name);
+
+      // Remove all cached instances from the container before deleting the app.
+      [self.container removeAllCachedInstances];
+
+      [sAllApps removeObjectForKey:self.name];
+      [self clearDataCollectionSwitchFromUserDefaults];
+      if ([self.name isEqualToString:kFIRDefaultAppName]) {
+        sDefaultApp = nil;
+      }
+      NSDictionary *appInfoDict = @{kFIRAppNameKey : self.name};
+      [[NSNotificationCenter defaultCenter] postNotificationName:kFIRAppDeleteNotification
+                                                          object:[self class]
+                                                        userInfo:appInfoDict];
+      completion(YES);
+    } else {
+      FIRLogError(kFIRLoggerCore, @"I-COR000007", @"App does not exist.");
+      completion(NO);
+    }
+  }
+}
+
++ (void)addAppToAppDictionary:(FIRApp *)app {
+  if (!sAllApps) {
+    sAllApps = [NSMutableDictionary dictionary];
+  }
+  if ([app configureCore]) {
+    sAllApps[app.name] = app;
+  } else {
+    [NSException raise:kFirebaseCoreErrorDomain
+                format:@"Configuration fails. It may be caused by an invalid GOOGLE_APP_ID in "
+                       @"GoogleService-Info.plist or set in the customized options."];
+  }
+}
+
+- (instancetype)initInstanceWithName:(NSString *)name options:(FIROptions *)options {
+  self = [super init];
+  if (self) {
+    _name = [name copy];
+    _options = [options copy];
+    _options.editingLocked = YES;
+    _isDefaultApp = [name isEqualToString:kFIRDefaultAppName];
+    _container = [[FIRComponentContainer alloc] initWithApp:self];
+  }
+  return self;
+}
+
+- (void)dealloc {
+  [[NSNotificationCenter defaultCenter] removeObserver:self];
+}
+
+- (BOOL)configureCore {
+  [self checkExpectedBundleID];
+  if (![self isAppIDValid]) {
+    return NO;
+  }
+
+  [self logCoreTelemetryIfEnabled];
+
+#if TARGET_OS_IOS
+  // Initialize the Analytics once there is a valid options under default app. Analytics should
+  // always initialize first by itself before the other SDKs.
+  if ([self.name isEqualToString:kFIRDefaultAppName]) {
+    Class firAnalyticsClass = NSClassFromString(@"FIRAnalytics");
+    if (firAnalyticsClass) {
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wundeclared-selector"
+      SEL startWithConfigurationSelector = @selector(startWithConfiguration:options:);
+#pragma clang diagnostic pop
+      if ([firAnalyticsClass respondsToSelector:startWithConfigurationSelector]) {
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+        [firAnalyticsClass performSelector:startWithConfigurationSelector
+                                withObject:[FIRConfiguration sharedInstance].analyticsConfiguration
+                                withObject:_options];
+#pragma clang diagnostic pop
+      }
+    }
+  }
+#endif
+
+  [self subscribeForAppDidBecomeActiveNotifications];
+
+  return YES;
+}
+
+- (FIROptions *)options {
+  return [_options copy];
+}
+
+- (void)setDataCollectionDefaultEnabled:(BOOL)dataCollectionDefaultEnabled {
+#ifdef DEBUG
+  FIRLogDebug(kFIRLoggerCore, @"I-COR000034", @"Explicitly %@ data collection flag.",
+              dataCollectionDefaultEnabled ? @"enabled" : @"disabled");
+  self.alreadyOutputDataCollectionFlag = YES;
+#endif  // DEBUG
+
+  NSString *key =
+      [NSString stringWithFormat:kFIRGlobalAppDataCollectionEnabledDefaultsKeyFormat, self.name];
+  [[NSUserDefaults standardUserDefaults] setBool:dataCollectionDefaultEnabled forKey:key];
+
+  // Core also controls the FirebaseAnalytics flag, so check if the Analytics flags are set
+  // within FIROptions and change the Analytics value if necessary. Analytics only works with the
+  // default app, so return if this isn't the default app.
+  if (!self.isDefaultApp) {
+    return;
+  }
+
+  // Check if the Analytics flag is explicitly set. If so, no further actions are necessary.
+  if ([self.options isAnalyticsCollectionExpicitlySet]) {
+    return;
+  }
+
+  // The Analytics flag has not been explicitly set, so update with the value being set.
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+  [[FIRAnalyticsConfiguration sharedInstance]
+      setAnalyticsCollectionEnabled:dataCollectionDefaultEnabled
+                     persistSetting:NO];
+#pragma clang diagnostic pop
+}
+
+- (BOOL)isDataCollectionDefaultEnabled {
+  // Check if it's been manually set before in code, and use that as the higher priority value.
+  NSNumber *defaultsObject = [[self class] readDataCollectionSwitchFromUserDefaultsForApp:self];
+  if (defaultsObject != nil) {
+#ifdef DEBUG
+    if (!self.alreadyOutputDataCollectionFlag) {
+      FIRLogDebug(kFIRLoggerCore, @"I-COR000031", @"Data Collection flag is %@ in user defaults.",
+                  [defaultsObject boolValue] ? @"enabled" : @"disabled");
+      self.alreadyOutputDataCollectionFlag = YES;
+    }
+#endif  // DEBUG
+    return [defaultsObject boolValue];
+  }
+
+  // Read the Info.plist to see if the flag is set. If it's not set, it should default to `YES`.
+  // As per the implementation of `readDataCollectionSwitchFromPlist`, it's a cached value and has
+  // no performance impact calling multiple times.
+  NSNumber *collectionEnabledPlistValue = [[self class] readDataCollectionSwitchFromPlist];
+  if (collectionEnabledPlistValue != nil) {
+#ifdef DEBUG
+    if (!self.alreadyOutputDataCollectionFlag) {
+      FIRLogDebug(kFIRLoggerCore, @"I-COR000032", @"Data Collection flag is %@ in plist.",
+                  [collectionEnabledPlistValue boolValue] ? @"enabled" : @"disabled");
+      self.alreadyOutputDataCollectionFlag = YES;
+    }
+#endif  // DEBUG
+    return [collectionEnabledPlistValue boolValue];
+  }
+
+#ifdef DEBUG
+  if (!self.alreadyOutputDataCollectionFlag) {
+    FIRLogDebug(kFIRLoggerCore, @"I-COR000033", @"Data Collection flag is not set.");
+    self.alreadyOutputDataCollectionFlag = YES;
+  }
+#endif  // DEBUG
+  return YES;
+}
+
+#pragma mark - private
+
++ (void)sendNotificationsToSDKs:(FIRApp *)app {
+  // TODO: Remove this notification once all SDKs are registered with `FIRCoreConfigurable`.
+  NSNumber *isDefaultApp = [NSNumber numberWithBool:app.isDefaultApp];
+  NSDictionary *appInfoDict = @{
+    kFIRAppNameKey : app.name,
+    kFIRAppIsDefaultAppKey : isDefaultApp,
+    kFIRGoogleAppIDKey : app.options.googleAppID
+  };
+  [[NSNotificationCenter defaultCenter] postNotificationName:kFIRAppReadyToConfigureSDKNotification
+                                                      object:self
+                                                    userInfo:appInfoDict];
+
+  // This is the new way of sending information to SDKs.
+  // TODO: Do we want this on a background thread, maybe?
+  @synchronized(self) {
+    for (Class<FIRLibrary> library in sRegisteredAsConfigurable) {
+      [library configureWithApp:app];
+    }
+  }
+}
+
++ (NSError *)errorForMissingOptions {
+  NSDictionary *errorDict = @{
+    NSLocalizedDescriptionKey :
+        @"Unable to parse GoogleService-Info.plist in order to configure services.",
+    NSLocalizedRecoverySuggestionErrorKey :
+        @"Check formatting and location of GoogleService-Info.plist."
+  };
+  return [NSError errorWithDomain:kFirebaseCoreErrorDomain
+                             code:FIRErrorCodeInvalidPlistFile
+                         userInfo:errorDict];
+}
+
++ (NSError *)errorForSubspecConfigurationFailureWithDomain:(NSString *)domain
+                                                 errorCode:(FIRErrorCode)code
+                                                   service:(NSString *)service
+                                                    reason:(NSString *)reason {
+  NSString *description =
+      [NSString stringWithFormat:@"Configuration failed for service %@.", service];
+  NSDictionary *errorDict =
+      @{NSLocalizedDescriptionKey : description, NSLocalizedFailureReasonErrorKey : reason};
+  return [NSError errorWithDomain:domain code:code userInfo:errorDict];
+}
+
++ (NSError *)errorForInvalidAppID {
+  NSDictionary *errorDict = @{
+    NSLocalizedDescriptionKey : @"Unable to validate Google App ID",
+    NSLocalizedRecoverySuggestionErrorKey :
+        @"Check formatting and location of GoogleService-Info.plist or GoogleAppID set in the "
+        @"customized options."
+  };
+  return [NSError errorWithDomain:kFirebaseCoreErrorDomain
+                             code:FIRErrorCodeInvalidAppID
+                         userInfo:errorDict];
+}
+
++ (BOOL)isDefaultAppConfigured {
+  return (sDefaultApp != nil);
+}
+
++ (void)registerLibrary:(nonnull NSString *)name withVersion:(nonnull NSString *)version {
+  // Create the set of characters which aren't allowed, only if this feature is used.
+  NSMutableCharacterSet *allowedSet = [NSMutableCharacterSet alphanumericCharacterSet];
+  [allowedSet addCharactersInString:@"-_."];
+  NSCharacterSet *disallowedSet = [allowedSet invertedSet];
+  // Make sure the library name and version strings do not contain unexpected characters, and
+  // add the name/version pair to the dictionary.
+  if ([name rangeOfCharacterFromSet:disallowedSet].location == NSNotFound &&
+      [version rangeOfCharacterFromSet:disallowedSet].location == NSNotFound) {
+    @synchronized(self) {
+      if (!sLibraryVersions) {
+        sLibraryVersions = [[NSMutableDictionary alloc] init];
+      }
+      sLibraryVersions[name] = version;
+    }
+  } else {
+    FIRLogError(kFIRLoggerCore, @"I-COR000027",
+                @"The library name (%@) or version number (%@) contain invalid characters. "
+                @"Only alphanumeric, dash, underscore and period characters are allowed.",
+                name, version);
+  }
+}
+
++ (void)registerInternalLibrary:(nonnull Class<FIRLibrary>)library
+                       withName:(nonnull NSString *)name
+                    withVersion:(nonnull NSString *)version {
+  // This is called at +load time, keep the work to a minimum.
+
+  // Ensure the class given conforms to the proper protocol.
+  if (![(Class)library conformsToProtocol:@protocol(FIRLibrary)] ||
+      ![(Class)library respondsToSelector:@selector(componentsToRegister)]) {
+    [NSException raise:NSInvalidArgumentException
+                format:@"Class %@ attempted to register components, but it does not conform to "
+                       @"`FIRLibrary or provide a `componentsToRegister:` method.",
+                       library];
+  }
+
+  [FIRComponentContainer registerAsComponentRegistrant:library];
+  if ([(Class)library respondsToSelector:@selector(configureWithApp:)]) {
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+      sRegisteredAsConfigurable = [[NSMutableArray alloc] init];
+    });
+    @synchronized(self) {
+      [sRegisteredAsConfigurable addObject:library];
+    }
+  }
+  [self registerLibrary:name withVersion:version];
+}
+
++ (NSString *)firebaseUserAgent {
+  @synchronized(self) {
+    NSMutableArray<NSString *> *libraries =
+        [[NSMutableArray<NSString *> alloc] initWithCapacity:sLibraryVersions.count];
+    for (NSString *libraryName in sLibraryVersions) {
+      [libraries addObject:[NSString stringWithFormat:@"%@/%@", libraryName,
+                                                      sLibraryVersions[libraryName]]];
+    }
+    [libraries sortUsingSelector:@selector(localizedCaseInsensitiveCompare:)];
+    return [libraries componentsJoinedByString:@" "];
+  }
+}
+
+- (void)checkExpectedBundleID {
+  NSArray *bundles = [FIRBundleUtil relevantBundles];
+  NSString *expectedBundleID = [self expectedBundleID];
+  // The checking is only done when the bundle ID is provided in the serviceInfo dictionary for
+  // backward compatibility.
+  if (expectedBundleID != nil && ![FIRBundleUtil hasBundleIdentifierPrefix:expectedBundleID
+                                                                 inBundles:bundles]) {
+    FIRLogError(kFIRLoggerCore, @"I-COR000008",
+                @"The project's Bundle ID is inconsistent with "
+                @"either the Bundle ID in '%@.%@', or the Bundle ID in the options if you are "
+                @"using a customized options. To ensure that everything can be configured "
+                @"correctly, you may need to make the Bundle IDs consistent. To continue with this "
+                @"plist file, you may change your app's bundle identifier to '%@'. Or you can "
+                @"download a new configuration file that matches your bundle identifier from %@ "
+                @"and replace the current one.",
+                kServiceInfoFileName, kServiceInfoFileType, expectedBundleID, kPlistURL);
+  }
+}
+
+#pragma mark - private - App ID Validation
+
+/**
+ * Validates the format and fingerprint of the app ID contained in GOOGLE_APP_ID in the plist file.
+ * This is the main method for validating app ID.
+ *
+ * @return YES if the app ID fulfills the expected format and fingerprint, NO otherwise.
+ */
+- (BOOL)isAppIDValid {
+  NSString *appID = _options.googleAppID;
+  BOOL isValid = [FIRApp validateAppID:appID];
+  if (!isValid) {
+    NSString *expectedBundleID = [self expectedBundleID];
+    FIRLogError(kFIRLoggerCore, @"I-COR000009",
+                @"The GOOGLE_APP_ID either in the plist file "
+                @"'%@.%@' or the one set in the customized options is invalid. If you are using "
+                @"the plist file, use the iOS version of bundle identifier to download the file, "
+                @"and do not manually edit the GOOGLE_APP_ID. You may change your app's bundle "
+                @"identifier to '%@'. Or you can download a new configuration file that matches "
+                @"your bundle identifier from %@ and replace the current one.",
+                kServiceInfoFileName, kServiceInfoFileType, expectedBundleID, kPlistURL);
+  };
+  return isValid;
+}
+
++ (BOOL)validateAppID:(NSString *)appID {
+  // Failing validation only occurs when we are sure we are looking at a V2 app ID and it does not
+  // have a valid fingerprint, otherwise we just warn about the potential issue.
+  if (!appID.length) {
+    return NO;
+  }
+
+  NSScanner *stringScanner = [NSScanner scannerWithString:appID];
+  stringScanner.charactersToBeSkipped = nil;
+
+  NSString *appIDVersion;
+  if (![stringScanner scanCharactersFromSet:[NSCharacterSet decimalDigitCharacterSet]
+                                 intoString:&appIDVersion]) {
+    return NO;
+  }
+
+  if (![stringScanner scanString:@":" intoString:NULL]) {
+    // appIDVersion must be separated by ":"
+    return NO;
+  }
+
+  NSArray *knownVersions = @[ @"1" ];
+  if (![knownVersions containsObject:appIDVersion]) {
+    // Permit unknown yet properly formatted app ID versions.
+    FIRLogInfo(kFIRLoggerCore, @"I-COR000010", @"Unknown GOOGLE_APP_ID version: %@", appIDVersion);
+    return YES;
+  }
+
+  if (![self validateAppIDFormat:appID withVersion:appIDVersion]) {
+    return NO;
+  }
+
+  if (![self validateAppIDFingerprint:appID withVersion:appIDVersion]) {
+    return NO;
+  }
+
+  return YES;
+}
+
++ (NSString *)actualBundleID {
+  return [[NSBundle mainBundle] bundleIdentifier];
+}
+
+/**
+ * Validates that the format of the app ID string is what is expected based on the supplied version.
+ * The version must end in ":".
+ *
+ * For v1 app ids the format is expected to be
+ * '<version #>:<project number>:ios:<fingerprint of bundle id>'.
+ *
+ * This method does not verify that the contents of the app id are correct, just that they fulfill
+ * the expected format.
+ *
+ * @param appID Contents of GOOGLE_APP_ID from the plist file.
+ * @param version Indicates what version of the app id format this string should be.
+ * @return YES if provided string fufills the expected format, NO otherwise.
+ */
++ (BOOL)validateAppIDFormat:(NSString *)appID withVersion:(NSString *)version {
+  if (!appID.length || !version.length) {
+    return NO;
+  }
+
+  NSScanner *stringScanner = [NSScanner scannerWithString:appID];
+  stringScanner.charactersToBeSkipped = nil;
+
+  // Skip version part
+  // '*<version #>*:<project number>:ios:<fingerprint of bundle id>'
+  if (![stringScanner scanString:version intoString:NULL]) {
+    // The version part is missing or mismatched
+    return NO;
+  }
+
+  // Validate version part (see part between '*' symbols below)
+  // '<version #>*:*<project number>:ios:<fingerprint of bundle id>'
+  if (![stringScanner scanString:@":" intoString:NULL]) {
+    // appIDVersion must be separated by ":"
+    return NO;
+  }
+
+  // Validate version part (see part between '*' symbols below)
+  // '<version #>:*<project number>*:ios:<fingerprint of bundle id>'.
+  NSInteger projectNumber = NSNotFound;
+  if (![stringScanner scanInteger:&projectNumber]) {
+    // NO project number found.
+    return NO;
+  }
+
+  // Validate version part (see part between '*' symbols below)
+  // '<version #>:<project number>*:*ios:<fingerprint of bundle id>'.
+  if (![stringScanner scanString:@":" intoString:NULL]) {
+    // The project number must be separated by ":"
+    return NO;
+  }
+
+  // Validate version part (see part between '*' symbols below)
+  // '<version #>:<project number>:*ios*:<fingerprint of bundle id>'.
+  NSString *platform;
+  if (![stringScanner scanUpToString:@":" intoString:&platform]) {
+    return NO;
+  }
+
+  if (![platform isEqualToString:@"ios"]) {
+    // The platform must be @"ios"
+    return NO;
+  }
+
+  // Validate version part (see part between '*' symbols below)
+  // '<version #>:<project number>:ios*:*<fingerprint of bundle id>'.
+  if (![stringScanner scanString:@":" intoString:NULL]) {
+    // The platform must be separated by ":"
+    return NO;
+  }
+
+  // Validate version part (see part between '*' symbols below)
+  // '<version #>:<project number>:ios:*<fingerprint of bundle id>*'.
+  unsigned long long fingerprint = NSNotFound;
+  if (![stringScanner scanHexLongLong:&fingerprint]) {
+    // Fingerprint part is missing
+    return NO;
+  }
+
+  if (!stringScanner.isAtEnd) {
+    // There are not allowed characters in the fingerprint part
+    return NO;
+  }
+
+  return YES;
+}
+
+/**
+ * Validates that the fingerprint of the app ID string is what is expected based on the supplied
+ * version.
+ *
+ * Note that the v1 hash algorithm is not permitted on the client and cannot be fully validated.
+ *
+ * @param appID Contents of GOOGLE_APP_ID from the plist file.
+ * @param version Indicates what version of the app id format this string should be.
+ * @return YES if provided string fufills the expected fingerprint and the version is known, NO
+ *         otherwise.
+ */
++ (BOOL)validateAppIDFingerprint:(NSString *)appID withVersion:(NSString *)version {
+  // Extract the supplied fingerprint from the supplied app ID.
+  // This assumes the app ID format is the same for all known versions below. If the app ID format
+  // changes in future versions, the tokenizing of the app ID format will need to take into account
+  // the version of the app ID.
+  NSArray *components = [appID componentsSeparatedByString:@":"];
+  if (components.count != 4) {
+    return NO;
+  }
+
+  NSString *suppliedFingerprintString = components[3];
+  if (!suppliedFingerprintString.length) {
+    return NO;
+  }
+
+  uint64_t suppliedFingerprint;
+  NSScanner *scanner = [NSScanner scannerWithString:suppliedFingerprintString];
+  if (![scanner scanHexLongLong:&suppliedFingerprint]) {
+    return NO;
+  }
+
+  if ([version isEqual:@"1"]) {
+    // The v1 hash algorithm is not permitted on the client so the actual hash cannot be validated.
+    return YES;
+  }
+
+  // Unknown version.
+  return NO;
+}
+
+- (NSString *)expectedBundleID {
+  return _options.bundleID;
+}
+
+// end App ID validation
+
+#pragma mark - Reading From Plist & User Defaults
+
+/**
+ * Clears the data collection switch from the standard NSUserDefaults for easier testing and
+ * readability.
+ */
+- (void)clearDataCollectionSwitchFromUserDefaults {
+  NSString *key =
+      [NSString stringWithFormat:kFIRGlobalAppDataCollectionEnabledDefaultsKeyFormat, self.name];
+  [[NSUserDefaults standardUserDefaults] removeObjectForKey:key];
+}
+
+/**
+ * Reads the data collection switch from the standard NSUserDefaults for easier testing and
+ * readability.
+ */
++ (nullable NSNumber *)readDataCollectionSwitchFromUserDefaultsForApp:(FIRApp *)app {
+  // Read the object in user defaults, and only return if it's an NSNumber.
+  NSString *key =
+      [NSString stringWithFormat:kFIRGlobalAppDataCollectionEnabledDefaultsKeyFormat, app.name];
+  id collectionEnabledDefaultsObject = [[NSUserDefaults standardUserDefaults] objectForKey:key];
+  if ([collectionEnabledDefaultsObject isKindOfClass:[NSNumber class]]) {
+    return collectionEnabledDefaultsObject;
+  }
+
+  return nil;
+}
+
+/**
+ * Reads the data collection switch from the Info.plist for easier testing and readability. Will
+ * only read once from the plist and return the cached value.
+ */
++ (nullable NSNumber *)readDataCollectionSwitchFromPlist {
+  static NSNumber *collectionEnabledPlistObject;
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    // Read the data from the `Info.plist`, only assign it if it's there and an NSNumber.
+    id plistValue = [[NSBundle mainBundle]
+        objectForInfoDictionaryKey:kFIRGlobalAppDataCollectionEnabledPlistKey];
+    if (plistValue && [plistValue isKindOfClass:[NSNumber class]]) {
+      collectionEnabledPlistObject = (NSNumber *)plistValue;
+    }
+  });
+
+  return collectionEnabledPlistObject;
+}
+
+#pragma mark - Sending Logs
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunused-parameter"
+- (void)sendLogsWithServiceName:(NSString *)serviceName
+                        version:(NSString *)version
+                          error:(NSError *)error {
+  // Do nothing. Please remove calls to this method.
+}
+#pragma clang diagnostic pop
+
+#pragma mark - App Life Cycle
+
+- (void)subscribeForAppDidBecomeActiveNotifications {
+#if TARGET_OS_IOS || TARGET_OS_TV
+  NSNotificationName notificationName = UIApplicationDidBecomeActiveNotification;
+#endif
+
+#if TARGET_OS_OSX
+  NSNotificationName notificationName = NSApplicationDidBecomeActiveNotification;
+#endif
+
+  [[NSNotificationCenter defaultCenter] addObserver:self
+                                           selector:@selector(appDidBecomeActive:)
+                                               name:notificationName
+                                             object:nil];
+}
+
+- (void)appDidBecomeActive:(NSNotification *)notification {
+  [self logCoreTelemetryIfEnabled];
+}
+
+- (void)logCoreTelemetryIfEnabled {
+  if ([self isDataCollectionDefaultEnabled]) {
+    [FIRCoreDiagnosticsConnector logCoreTelemetryWithOptions:_options];
+  }
+}
+
+@end

Pods/FirebaseCore/Firebase/Core/FIRAppAssociationRegistration.m

@@ -0,0 +1,47 @@
+// Copyright 2017 Google
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import "Private/FIRAppAssociationRegistration.h"
+
+#import <objc/runtime.h>
+
+@implementation FIRAppAssociationRegistration
+
++ (nullable id)registeredObjectWithHost:(id)host
+                                    key:(NSString *)key
+                          creationBlock:(id _Nullable (^)(void))creationBlock {
+  @synchronized(self) {
+    SEL dictKey = @selector(registeredObjectWithHost:key:creationBlock:);
+    NSMutableDictionary<NSString *, id> *objectsByKey = objc_getAssociatedObject(host, dictKey);
+    if (!objectsByKey) {
+      objectsByKey = [[NSMutableDictionary alloc] init];
+      objc_setAssociatedObject(host, dictKey, objectsByKey, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+    }
+    id obj = objectsByKey[key];
+    NSValue *creationBlockBeingCalled = [NSValue valueWithPointer:dictKey];
+    if (obj) {
+      if ([creationBlockBeingCalled isEqual:obj]) {
+        [NSException raise:@"Reentering registeredObjectWithHost:key:creationBlock: not allowed"
+                    format:@"host: %@ key: %@", host, key];
+      }
+      return obj;
+    }
+    objectsByKey[key] = creationBlockBeingCalled;
+    obj = creationBlock();
+    objectsByKey[key] = obj;
+    return obj;
+  }
+}
+
+@end

Pods/FirebaseCore/Firebase/Core/FIRBundleUtil.m

@@ -0,0 +1,75 @@
+// Copyright 2017 Google
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import "Private/FIRBundleUtil.h"
+
+#import <GoogleUtilities/GULAppEnvironmentUtil.h>
+
+@implementation FIRBundleUtil
+
++ (NSArray *)relevantBundles {
+  return @[ [NSBundle mainBundle], [NSBundle bundleForClass:[self class]] ];
+}
+
++ (NSString *)optionsDictionaryPathWithResourceName:(NSString *)resourceName
+                                        andFileType:(NSString *)fileType
+                                          inBundles:(NSArray *)bundles {
+  // Loop through all bundles to find the config dict.
+  for (NSBundle *bundle in bundles) {
+    NSString *path = [bundle pathForResource:resourceName ofType:fileType];
+    // Use the first one we find.
+    if (path) {
+      return path;
+    }
+  }
+  return nil;
+}
+
++ (NSArray *)relevantURLSchemes {
+  NSMutableArray *result = [[NSMutableArray alloc] init];
+  for (NSBundle *bundle in [[self class] relevantBundles]) {
+    NSArray *urlTypes = [bundle objectForInfoDictionaryKey:@"CFBundleURLTypes"];
+    for (NSDictionary *urlType in urlTypes) {
+      [result addObjectsFromArray:urlType[@"CFBundleURLSchemes"]];
+    }
+  }
+  return result;
+}
+
++ (BOOL)hasBundleIdentifierPrefix:(NSString *)bundleIdentifier inBundles:(NSArray *)bundles {
+  for (NSBundle *bundle in bundles) {
+    // This allows app extensions that have the app's bundle as their prefix to pass this test.
+    NSString *applicationBundleIdentifier =
+        [GULAppEnvironmentUtil isAppExtension]
+            ? [self bundleIdentifierByRemovingLastPartFrom:bundle.bundleIdentifier]
+            : bundle.bundleIdentifier;
+
+    if ([applicationBundleIdentifier isEqualToString:bundleIdentifier]) {
+      return YES;
+    }
+  }
+  return NO;
+}
+
++ (NSString *)bundleIdentifierByRemovingLastPartFrom:(NSString *)bundleIdentifier {
+  NSString *bundleIDComponentsSeparator = @".";
+
+  NSMutableArray<NSString *> *bundleIDComponents =
+      [[bundleIdentifier componentsSeparatedByString:bundleIDComponentsSeparator] mutableCopy];
+  [bundleIDComponents removeLastObject];
+
+  return [bundleIDComponents componentsJoinedByString:bundleIDComponentsSeparator];
+}
+
+@end

Pods/FirebaseCore/Firebase/Core/FIRComponent.m

@@ -0,0 +1,65 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "Private/FIRComponent.h"
+
+#import "Private/FIRComponentContainer.h"
+#import "Private/FIRDependency.h"
+
+@interface FIRComponent ()
+
+- (instancetype)initWithProtocol:(Protocol *)protocol
+             instantiationTiming:(FIRInstantiationTiming)instantiationTiming
+                    dependencies:(NSArray<FIRDependency *> *)dependencies
+                   creationBlock:(FIRComponentCreationBlock)creationBlock;
+
+@end
+
+@implementation FIRComponent
+
++ (instancetype)componentWithProtocol:(Protocol *)protocol
+                        creationBlock:(FIRComponentCreationBlock)creationBlock {
+  return [[FIRComponent alloc] initWithProtocol:protocol
+                            instantiationTiming:FIRInstantiationTimingLazy
+                                   dependencies:@[]
+                                  creationBlock:creationBlock];
+}
+
++ (instancetype)componentWithProtocol:(Protocol *)protocol
+                  instantiationTiming:(FIRInstantiationTiming)instantiationTiming
+                         dependencies:(NSArray<FIRDependency *> *)dependencies
+                        creationBlock:(FIRComponentCreationBlock)creationBlock {
+  return [[FIRComponent alloc] initWithProtocol:protocol
+                            instantiationTiming:instantiationTiming
+                                   dependencies:dependencies
+                                  creationBlock:creationBlock];
+}
+
+- (instancetype)initWithProtocol:(Protocol *)protocol
+             instantiationTiming:(FIRInstantiationTiming)instantiationTiming
+                    dependencies:(NSArray<FIRDependency *> *)dependencies
+                   creationBlock:(FIRComponentCreationBlock)creationBlock {
+  self = [super init];
+  if (self) {
+    _protocol = protocol;
+    _instantiationTiming = instantiationTiming;
+    _dependencies = [dependencies copy];
+    _creationBlock = creationBlock;
+  }
+  return self;
+}
+
+@end

Pods/FirebaseCore/Firebase/Core/FIRComponentContainer.m

@@ -0,0 +1,176 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "Private/FIRComponentContainer.h"
+
+#import "Private/FIRAppInternal.h"
+#import "Private/FIRComponent.h"
+#import "Private/FIRLibrary.h"
+#import "Private/FIRLogger.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface FIRComponentContainer ()
+
+/// The dictionary of components that are registered for a particular app. The key is an NSString
+/// of the protocol.
+@property(nonatomic, strong) NSMutableDictionary<NSString *, FIRComponentCreationBlock> *components;
+
+/// Cached instances of components that requested to be cached.
+@property(nonatomic, strong) NSMutableDictionary<NSString *, id> *cachedInstances;
+
+@end
+
+@implementation FIRComponentContainer
+
+// Collection of all classes that register to provide components.
+static NSMutableSet<Class> *sFIRComponentRegistrants;
+
+#pragma mark - Public Registration
+
++ (void)registerAsComponentRegistrant:(Class<FIRLibrary>)klass {
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    sFIRComponentRegistrants = [[NSMutableSet<Class> alloc] init];
+  });
+
+  [self registerAsComponentRegistrant:klass inSet:sFIRComponentRegistrants];
+}
+
++ (void)registerAsComponentRegistrant:(Class<FIRLibrary>)klass
+                                inSet:(NSMutableSet<Class> *)allRegistrants {
+  [allRegistrants addObject:klass];
+}
+
+#pragma mark - Internal Initialization
+
+- (instancetype)initWithApp:(FIRApp *)app {
+  return [self initWithApp:app registrants:sFIRComponentRegistrants];
+}
+
+- (instancetype)initWithApp:(FIRApp *)app registrants:(NSMutableSet<Class> *)allRegistrants {
+  self = [super init];
+  if (self) {
+    _app = app;
+    _cachedInstances = [NSMutableDictionary<NSString *, id> dictionary];
+    _components = [NSMutableDictionary<NSString *, FIRComponentCreationBlock> dictionary];
+
+    [self populateComponentsFromRegisteredClasses:allRegistrants forApp:app];
+  }
+  return self;
+}
+
+- (void)populateComponentsFromRegisteredClasses:(NSSet<Class> *)classes forApp:(FIRApp *)app {
+  // Loop through the verified component registrants and populate the components array.
+  for (Class<FIRLibrary> klass in classes) {
+    // Loop through all the components being registered and store them as appropriate.
+    // Classes which do not provide functionality should use a dummy FIRComponentRegistrant
+    // protocol.
+    for (FIRComponent *component in [klass componentsToRegister]) {
+      // Check if the component has been registered before, and error out if so.
+      NSString *protocolName = NSStringFromProtocol(component.protocol);
+      if (self.components[protocolName]) {
+        FIRLogError(kFIRLoggerCore, @"I-COR000029",
+                    @"Attempted to register protocol %@, but it already has an implementation.",
+                    protocolName);
+        continue;
+      }
+
+      // Store the creation block for later usage.
+      self.components[protocolName] = component.creationBlock;
+
+      // Instantiate the
+      BOOL shouldInstantiateEager =
+          (component.instantiationTiming == FIRInstantiationTimingAlwaysEager);
+      BOOL shouldInstantiateDefaultEager =
+          (component.instantiationTiming == FIRInstantiationTimingEagerInDefaultApp &&
+           [app isDefaultApp]);
+      if (shouldInstantiateEager || shouldInstantiateDefaultEager) {
+        [self instantiateInstanceForProtocol:component.protocol withBlock:component.creationBlock];
+      }
+    }
+  }
+}
+
+#pragma mark - Instance Creation
+
+/// Instantiate an instance of a class that conforms to the specified protocol.
+/// This will:
+///   - Call the block to create an instance if possible,
+///   - Validate that the instance returned conforms to the protocol it claims to,
+///   - Cache the instance if the block requests it
+- (nullable id)instantiateInstanceForProtocol:(Protocol *)protocol
+                                    withBlock:(FIRComponentCreationBlock)creationBlock {
+  if (!creationBlock) {
+    return nil;
+  }
+
+  // Create an instance using the creation block.
+  BOOL shouldCache = NO;
+  id instance = creationBlock(self, &shouldCache);
+  if (!instance) {
+    return nil;
+  }
+
+  // An instance was created, validate that it conforms to the protocol it claims to.
+  NSString *protocolName = NSStringFromProtocol(protocol);
+  if (![instance conformsToProtocol:protocol]) {
+    FIRLogError(kFIRLoggerCore, @"I-COR000030",
+                @"An instance conforming to %@ was requested, but the instance provided does not "
+                @"conform to the protocol",
+                protocolName);
+  }
+
+  // The instance is ready to be returned, but check if it should be cached first before returning.
+  if (shouldCache) {
+    self.cachedInstances[protocolName] = instance;
+  }
+
+  return instance;
+}
+
+#pragma mark - Internal Retrieval
+
+- (nullable id)instanceForProtocol:(Protocol *)protocol {
+  // Check if there is a cached instance, and return it if so.
+  NSString *protocolName = NSStringFromProtocol(protocol);
+  id cachedInstance = self.cachedInstances[protocolName];
+  if (cachedInstance) {
+    return cachedInstance;
+  }
+
+  // Use the creation block to instantiate an instance and return it.
+  FIRComponentCreationBlock creationBlock = self.components[protocolName];
+  return [self instantiateInstanceForProtocol:protocol withBlock:creationBlock];
+}
+
+#pragma mark - Lifecycle
+
+- (void)removeAllCachedInstances {
+  // Loop through the cache and notify each instance that is a maintainer to clean up after itself.
+  for (id instance in self.cachedInstances.allValues) {
+    if ([instance conformsToProtocol:@protocol(FIRComponentLifecycleMaintainer)] &&
+        [instance respondsToSelector:@selector(appWillBeDeleted:)]) {
+      [instance appWillBeDeleted:self.app];
+    }
+  }
+
+  [self.cachedInstances removeAllObjects];
+}
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/Firebase/Core/FIRComponentType.m

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "Private/FIRComponentType.h"
+
+#import "Private/FIRComponentContainerInternal.h"
+
+@implementation FIRComponentType
+
++ (id)instanceForProtocol:(Protocol *)protocol inContainer:(FIRComponentContainer *)container {
+  // Forward the call to the container.
+  return [container instanceForProtocol:protocol];
+}
+
+@end

Pods/FirebaseCore/Firebase/Core/FIRConfiguration.m

@@ -0,0 +1,46 @@
+// Copyright 2017 Google
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import "Private/FIRConfigurationInternal.h"
+
+#import "Private/FIRAnalyticsConfiguration.h"
+
+extern void FIRSetLoggerLevel(FIRLoggerLevel loggerLevel);
+
+@implementation FIRConfiguration
+
++ (instancetype)sharedInstance {
+  static FIRConfiguration *sharedInstance = nil;
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    sharedInstance = [[FIRConfiguration alloc] init];
+  });
+  return sharedInstance;
+}
+
+- (instancetype)init {
+  self = [super init];
+  if (self) {
+    _analyticsConfiguration = [FIRAnalyticsConfiguration sharedInstance];
+  }
+  return self;
+}
+
+- (void)setLoggerLevel:(FIRLoggerLevel)loggerLevel {
+  NSAssert(loggerLevel <= FIRLoggerLevelMax && loggerLevel >= FIRLoggerLevelMin,
+           @"Invalid logger level, %ld", (long)loggerLevel);
+  FIRSetLoggerLevel(loggerLevel);
+}
+
+@end

Pods/FirebaseCore/Firebase/Core/FIRCoreDiagnosticsConnector.m

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "Private/FIRCoreDiagnosticsConnector.h"
+
+#import <FirebaseCoreDiagnosticsInterop/FIRCoreDiagnosticsInterop.h>
+
+#import <FirebaseCore/FIROptions.h>
+
+#import "Private/FIRAppInternal.h"
+#import "Private/FIRDiagnosticsData.h"
+#import "Private/FIROptionsInternal.h"
+
+// Define the interop class symbol declared as an extern in FIRCoreDiagnosticsInterop.
+Class<FIRCoreDiagnosticsInterop> FIRCoreDiagnosticsImplementation;
+
+@implementation FIRCoreDiagnosticsConnector
+
++ (void)initialize {
+  if (!FIRCoreDiagnosticsImplementation) {
+    FIRCoreDiagnosticsImplementation = NSClassFromString(@"FIRCoreDiagnostics");
+    if (FIRCoreDiagnosticsImplementation) {
+      NSAssert([FIRCoreDiagnosticsImplementation
+                   conformsToProtocol:@protocol(FIRCoreDiagnosticsInterop)],
+               @"If FIRCoreDiagnostics is implemented, it must conform to the interop protocol.");
+      NSAssert(
+          [FIRCoreDiagnosticsImplementation respondsToSelector:@selector(sendDiagnosticsData:)],
+          @"If FIRCoreDiagnostics is implemented, it must implement +sendDiagnosticsData.");
+    }
+  }
+}
+
++ (void)logCoreTelemetryWithOptions:(FIROptions *)options {
+  if (FIRCoreDiagnosticsImplementation) {
+    FIRDiagnosticsData *diagnosticsData = [[FIRDiagnosticsData alloc] init];
+    [diagnosticsData insertValue:@(YES) forKey:kFIRCDIsDataCollectionDefaultEnabledKey];
+    [diagnosticsData insertValue:[FIRApp firebaseUserAgent] forKey:kFIRCDFirebaseUserAgentKey];
+    [diagnosticsData insertValue:@(FIRConfigTypeCore) forKey:kFIRCDConfigurationTypeKey];
+    [diagnosticsData insertValue:options.googleAppID forKey:kFIRCDGoogleAppIDKey];
+    [diagnosticsData insertValue:options.bundleID forKey:kFIRCDBundleIDKey];
+    [diagnosticsData insertValue:@(options.usingOptionsFromDefaultPlist)
+                          forKey:kFIRCDUsingOptionsFromDefaultPlistKey];
+    [diagnosticsData insertValue:options.libraryVersionID forKey:kFIRCDLibraryVersionIDKey];
+    [FIRCoreDiagnosticsImplementation sendDiagnosticsData:diagnosticsData];
+  }
+}
+
+@end

Pods/FirebaseCore/Firebase/Core/FIRDependency.m

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "Private/FIRDependency.h"
+
+@interface FIRDependency ()
+
+- (instancetype)initWithProtocol:(Protocol *)protocol isRequired:(BOOL)required;
+
+@end
+
+@implementation FIRDependency
+
++ (instancetype)dependencyWithProtocol:(Protocol *)protocol {
+  return [[self alloc] initWithProtocol:protocol isRequired:YES];
+}
+
++ (instancetype)dependencyWithProtocol:(Protocol *)protocol isRequired:(BOOL)required {
+  return [[self alloc] initWithProtocol:protocol isRequired:required];
+}
+
+- (instancetype)initWithProtocol:(Protocol *)protocol isRequired:(BOOL)required {
+  self = [super init];
+  if (self) {
+    _protocol = protocol;
+    _isRequired = required;
+  }
+  return self;
+}
+
+@end

Pods/FirebaseCore/Firebase/Core/FIRDiagnosticsData.m

@@ -0,0 +1,66 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "Private/FIRDiagnosticsData.h"
+
+#import <FirebaseCore/FIRApp.h>
+
+#import "Private/FIRAppInternal.h"
+#import "Private/FIROptionsInternal.h"
+
+@implementation FIRDiagnosticsData {
+  /** Backing ivar for the diagnosticObjects property. */
+  NSMutableDictionary<NSString *, id> *_diagnosticObjects;
+}
+
+- (instancetype)init {
+  self = [super init];
+  if (self) {
+    _diagnosticObjects = [[NSMutableDictionary alloc] init];
+  }
+  return self;
+}
+
+- (void)insertValue:(nullable id)value forKey:(NSString *)key {
+  if (key) {
+    _diagnosticObjects[key] = value;
+  }
+}
+
+#pragma mark - FIRCoreDiagnosticsData
+
+- (NSDictionary<NSString *, id> *)diagnosticObjects {
+  if (!_diagnosticObjects[kFIRCDllAppsCountKey]) {
+    _diagnosticObjects[kFIRCDllAppsCountKey] = @([FIRApp allApps].count);
+  }
+  if (!_diagnosticObjects[kFIRCDIsDataCollectionDefaultEnabledKey]) {
+    _diagnosticObjects[kFIRCDIsDataCollectionDefaultEnabledKey] =
+        @([[FIRApp defaultApp] isDataCollectionDefaultEnabled]);
+  }
+  if (!_diagnosticObjects[kFIRCDFirebaseUserAgentKey]) {
+    _diagnosticObjects[kFIRCDFirebaseUserAgentKey] = [FIRApp firebaseUserAgent];
+  }
+  return _diagnosticObjects;
+}
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunused-parameter"
+- (void)setDiagnosticObjects:(NSDictionary<NSString *, id> *)diagnosticObjects {
+  NSAssert(NO, @"Please use -insertValue:forKey:");
+}
+#pragma clang diagnostic pop
+
+@end

Pods/FirebaseCore/Firebase/Core/FIRErrors.m

@@ -0,0 +1,21 @@
+// Copyright 2017 Google
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import "Private/FIRErrors.h"
+
+NSString *const kFirebaseErrorDomain = @"com.firebase";
+NSString *const kFirebaseConfigErrorDomain = @"com.firebase.config";
+NSString *const kFirebaseCoreErrorDomain = @"com.firebase.core";
+NSString *const kFirebasePerfErrorDomain = @"com.firebase.perf";
+NSString *const kFirebaseStorageErrorDomain = @"com.firebase.storage";

Pods/FirebaseCore/Firebase/Core/FIRLogger.m

@@ -0,0 +1,179 @@
+// Copyright 2017 Google
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import "Private/FIRLogger.h"
+
+#import <FirebaseCore/FIRLoggerLevel.h>
+#import <GoogleUtilities/GULAppEnvironmentUtil.h>
+#import <GoogleUtilities/GULLogger.h>
+
+#import "Private/FIRVersion.h"
+
+FIRLoggerService kFIRLoggerCore = @"[Firebase/Core]";
+
+// All the FIRLoggerService definitions should be migrated to clients. Do not add new ones!
+FIRLoggerService kFIRLoggerABTesting = @"[Firebase/ABTesting]";
+FIRLoggerService kFIRLoggerAdMob = @"[Firebase/AdMob]";
+FIRLoggerService kFIRLoggerAnalytics = @"[Firebase/Analytics]";
+FIRLoggerService kFIRLoggerAuth = @"[Firebase/Auth]";
+FIRLoggerService kFIRLoggerCrash = @"[Firebase/Crash]";
+FIRLoggerService kFIRLoggerMLKit = @"[Firebase/MLKit]";
+FIRLoggerService kFIRLoggerPerf = @"[Firebase/Performance]";
+FIRLoggerService kFIRLoggerRemoteConfig = @"[Firebase/RemoteConfig]";
+
+/// Arguments passed on launch.
+NSString *const kFIRDisableDebugModeApplicationArgument = @"-FIRDebugDisabled";
+NSString *const kFIREnableDebugModeApplicationArgument = @"-FIRDebugEnabled";
+NSString *const kFIRLoggerForceSDTERRApplicationArgument = @"-FIRLoggerForceSTDERR";
+
+/// Key for the debug mode bit in NSUserDefaults.
+NSString *const kFIRPersistedDebugModeKey = @"/google/firebase/debug_mode";
+
+/// NSUserDefaults that should be used to store and read variables. If nil, `standardUserDefaults`
+/// will be used.
+static NSUserDefaults *sFIRLoggerUserDefaults;
+
+static dispatch_once_t sFIRLoggerOnceToken;
+
+// The sFIRAnalyticsDebugMode flag is here to support the -FIRDebugEnabled/-FIRDebugDisabled
+// flags used by Analytics. Users who use those flags expect Analytics to log verbosely,
+// while the rest of Firebase logs at the default level. This flag is introduced to support
+// that behavior.
+static BOOL sFIRAnalyticsDebugMode;
+
+#ifdef DEBUG
+/// The regex pattern for the message code.
+static NSString *const kMessageCodePattern = @"^I-[A-Z]{3}[0-9]{6}$";
+static NSRegularExpression *sMessageCodeRegex;
+#endif
+
+void FIRLoggerInitializeASL() {
+  dispatch_once(&sFIRLoggerOnceToken, ^{
+    // Register Firebase Version with GULLogger.
+    GULLoggerRegisterVersion(FIRVersionString);
+
+    // Override the aslOptions to ASL_OPT_STDERR if the override argument is passed in.
+    NSArray *arguments = [NSProcessInfo processInfo].arguments;
+    BOOL overrideSTDERR = [arguments containsObject:kFIRLoggerForceSDTERRApplicationArgument];
+
+    // Use the standard NSUserDefaults if it hasn't been explicitly set.
+    if (sFIRLoggerUserDefaults == nil) {
+      sFIRLoggerUserDefaults = [NSUserDefaults standardUserDefaults];
+    }
+
+    BOOL forceDebugMode = NO;
+    BOOL debugMode = [sFIRLoggerUserDefaults boolForKey:kFIRPersistedDebugModeKey];
+    if ([arguments containsObject:kFIRDisableDebugModeApplicationArgument]) {  // Default mode
+      [sFIRLoggerUserDefaults removeObjectForKey:kFIRPersistedDebugModeKey];
+    } else if ([arguments containsObject:kFIREnableDebugModeApplicationArgument] ||
+               debugMode) {  // Debug mode
+      [sFIRLoggerUserDefaults setBool:YES forKey:kFIRPersistedDebugModeKey];
+      forceDebugMode = YES;
+    }
+    GULLoggerInitializeASL();
+    if (overrideSTDERR) {
+      GULLoggerEnableSTDERR();
+    }
+    if (forceDebugMode) {
+      GULLoggerForceDebug();
+    }
+  });
+}
+
+__attribute__((no_sanitize("thread"))) void FIRSetAnalyticsDebugMode(BOOL analyticsDebugMode) {
+  sFIRAnalyticsDebugMode = analyticsDebugMode;
+}
+
+void FIRSetLoggerLevel(FIRLoggerLevel loggerLevel) {
+  FIRLoggerInitializeASL();
+  GULSetLoggerLevel((GULLoggerLevel)loggerLevel);
+}
+
+#ifdef DEBUG
+void FIRResetLogger() {
+  extern void GULResetLogger(void);
+  sFIRLoggerOnceToken = 0;
+  [sFIRLoggerUserDefaults removeObjectForKey:kFIRPersistedDebugModeKey];
+  sFIRLoggerUserDefaults = nil;
+  GULResetLogger();
+}
+
+void FIRSetLoggerUserDefaults(NSUserDefaults *defaults) {
+  sFIRLoggerUserDefaults = defaults;
+}
+#endif
+
+/**
+ * Check if the level is high enough to be loggable.
+ *
+ * Analytics can override the log level with an intentional race condition.
+ * Add the attribute to get a clean thread sanitizer run.
+ */
+__attribute__((no_sanitize("thread"))) BOOL FIRIsLoggableLevel(FIRLoggerLevel loggerLevel,
+                                                               BOOL analyticsComponent) {
+  FIRLoggerInitializeASL();
+  if (sFIRAnalyticsDebugMode && analyticsComponent) {
+    return YES;
+  }
+  return GULIsLoggableLevel((GULLoggerLevel)loggerLevel);
+}
+
+void FIRLogBasic(FIRLoggerLevel level,
+                 FIRLoggerService service,
+                 NSString *messageCode,
+                 NSString *message,
+                 va_list args_ptr) {
+  FIRLoggerInitializeASL();
+  GULLogBasic((GULLoggerLevel)level, service,
+              sFIRAnalyticsDebugMode && [kFIRLoggerAnalytics isEqualToString:service], messageCode,
+              message, args_ptr);
+}
+
+/**
+ * Generates the logging functions using macros.
+ *
+ * Calling FIRLogError(kFIRLoggerCore, @"I-COR000001", @"Configure %@ failed.", @"blah") shows:
+ * yyyy-mm-dd hh:mm:ss.SSS sender[PID] <Error> [Firebase/Core][I-COR000001] Configure blah failed.
+ * Calling FIRLogDebug(kFIRLoggerCore, @"I-COR000001", @"Configure succeed.") shows:
+ * yyyy-mm-dd hh:mm:ss.SSS sender[PID] <Debug> [Firebase/Core][I-COR000001] Configure succeed.
+ */
+#define FIR_LOGGING_FUNCTION(level)                                                             \
+  void FIRLog##level(FIRLoggerService service, NSString *messageCode, NSString *message, ...) { \
+    va_list args_ptr;                                                                           \
+    va_start(args_ptr, message);                                                                \
+    FIRLogBasic(FIRLoggerLevel##level, service, messageCode, message, args_ptr);                \
+    va_end(args_ptr);                                                                           \
+  }
+
+FIR_LOGGING_FUNCTION(Error)
+FIR_LOGGING_FUNCTION(Warning)
+FIR_LOGGING_FUNCTION(Notice)
+FIR_LOGGING_FUNCTION(Info)
+FIR_LOGGING_FUNCTION(Debug)
+
+#undef FIR_MAKE_LOGGER
+
+#pragma mark - FIRLoggerWrapper
+
+@implementation FIRLoggerWrapper
+
++ (void)logWithLevel:(FIRLoggerLevel)level
+         withService:(FIRLoggerService)service
+            withCode:(NSString *)messageCode
+         withMessage:(NSString *)message
+            withArgs:(va_list)args {
+  FIRLogBasic(level, service, messageCode, message, args);
+}
+
+@end

Pods/FirebaseCore/Firebase/Core/FIROptions.m

@@ -0,0 +1,454 @@
+// Copyright 2017 Google
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import "Private/FIRAppInternal.h"
+#import "Private/FIRBundleUtil.h"
+#import "Private/FIRErrors.h"
+#import "Private/FIRLogger.h"
+#import "Private/FIROptionsInternal.h"
+#import "Private/FIRVersion.h"
+
+// Keys for the strings in the plist file.
+NSString *const kFIRAPIKey = @"API_KEY";
+NSString *const kFIRTrackingID = @"TRACKING_ID";
+NSString *const kFIRGoogleAppID = @"GOOGLE_APP_ID";
+NSString *const kFIRClientID = @"CLIENT_ID";
+NSString *const kFIRGCMSenderID = @"GCM_SENDER_ID";
+NSString *const kFIRAndroidClientID = @"ANDROID_CLIENT_ID";
+NSString *const kFIRDatabaseURL = @"DATABASE_URL";
+NSString *const kFIRStorageBucket = @"STORAGE_BUCKET";
+// The key to locate the expected bundle identifier in the plist file.
+NSString *const kFIRBundleID = @"BUNDLE_ID";
+// The key to locate the project identifier in the plist file.
+NSString *const kFIRProjectID = @"PROJECT_ID";
+
+NSString *const kFIRIsMeasurementEnabled = @"IS_MEASUREMENT_ENABLED";
+NSString *const kFIRIsAnalyticsCollectionEnabled = @"FIREBASE_ANALYTICS_COLLECTION_ENABLED";
+NSString *const kFIRIsAnalyticsCollectionDeactivated = @"FIREBASE_ANALYTICS_COLLECTION_DEACTIVATED";
+
+NSString *const kFIRIsAnalyticsEnabled = @"IS_ANALYTICS_ENABLED";
+NSString *const kFIRIsSignInEnabled = @"IS_SIGNIN_ENABLED";
+
+// Library version ID formatted like:
+// @"5"     // Major version (one or more digits)
+// @"04"    // Minor version (exactly 2 digits)
+// @"01"    // Build number (exactly 2 digits)
+// @"000";  // Fixed "000"
+NSString *kFIRLibraryVersionID;
+
+// Plist file name.
+NSString *const kServiceInfoFileName = @"GoogleService-Info";
+// Plist file type.
+NSString *const kServiceInfoFileType = @"plist";
+
+// Exception raised from attempting to modify a FIROptions after it's been copied to a FIRApp.
+NSString *const kFIRExceptionBadModification =
+    @"Attempted to modify options after it's set on FIRApp. Please modify all properties before "
+    @"initializing FIRApp.";
+
+@interface FIROptions ()
+
+/**
+ * This property maintains the actual configuration key-value pairs.
+ */
+@property(nonatomic, readwrite) NSMutableDictionary *optionsDictionary;
+
+/**
+ * Calls `analyticsOptionsDictionaryWithInfoDictionary:` using [NSBundle mainBundle].infoDictionary.
+ * It combines analytics options from both the infoDictionary and the GoogleService-Info.plist.
+ * Values which are present in the main plist override values from the GoogleService-Info.plist.
+ */
+@property(nonatomic, readonly) NSDictionary *analyticsOptionsDictionary;
+
+/**
+ * Combination of analytics options from both the infoDictionary and the GoogleService-Info.plist.
+ * Values which are present in the infoDictionary override values from the GoogleService-Info.plist.
+ */
+- (NSDictionary *)analyticsOptionsDictionaryWithInfoDictionary:(NSDictionary *)infoDictionary;
+
+/**
+ * Throw exception if editing is locked when attempting to modify an option.
+ */
+- (void)checkEditingLocked;
+
+@end
+
+@implementation FIROptions {
+  /// Backing variable for self.analyticsOptionsDictionary.
+  NSDictionary *_analyticsOptionsDictionary;
+}
+
+static FIROptions *sDefaultOptions = nil;
+static NSDictionary *sDefaultOptionsDictionary = nil;
+
+#pragma mark - Public only for internal class methods
+
++ (FIROptions *)defaultOptions {
+  if (sDefaultOptions != nil) {
+    return sDefaultOptions;
+  }
+
+  NSDictionary *defaultOptionsDictionary = [self defaultOptionsDictionary];
+  if (defaultOptionsDictionary == nil) {
+    return nil;
+  }
+
+  sDefaultOptions = [[FIROptions alloc] initInternalWithOptionsDictionary:defaultOptionsDictionary];
+  return sDefaultOptions;
+}
+
+#pragma mark - Private class methods
+
++ (void)initialize {
+  // Report FirebaseCore version for useragent string
+  [FIRApp registerLibrary:@"fire-ios"
+              withVersion:[NSString stringWithUTF8String:FIRCoreVersionString]];
+
+  NSDictionary<NSString *, id> *info = [[NSBundle mainBundle] infoDictionary];
+  NSString *xcodeVersion = info[@"DTXcodeBuild"];
+  NSString *sdkVersion = info[@"DTSDKBuild"];
+  if (xcodeVersion) {
+    [FIRApp registerLibrary:@"xcode" withVersion:xcodeVersion];
+  }
+  if (sdkVersion) {
+    [FIRApp registerLibrary:@"apple-sdk" withVersion:sdkVersion];
+  }
+}
+
++ (NSDictionary *)defaultOptionsDictionary {
+  if (sDefaultOptionsDictionary != nil) {
+    return sDefaultOptionsDictionary;
+  }
+  NSString *plistFilePath = [FIROptions plistFilePathWithName:kServiceInfoFileName];
+  if (plistFilePath == nil) {
+    return nil;
+  }
+  sDefaultOptionsDictionary = [NSDictionary dictionaryWithContentsOfFile:plistFilePath];
+  if (sDefaultOptionsDictionary == nil) {
+    FIRLogError(kFIRLoggerCore, @"I-COR000011",
+                @"The configuration file is not a dictionary: "
+                @"'%@.%@'.",
+                kServiceInfoFileName, kServiceInfoFileType);
+  }
+  return sDefaultOptionsDictionary;
+}
+
+// Returns the path of the plist file with a given file name.
++ (NSString *)plistFilePathWithName:(NSString *)fileName {
+  NSArray *bundles = [FIRBundleUtil relevantBundles];
+  NSString *plistFilePath =
+      [FIRBundleUtil optionsDictionaryPathWithResourceName:fileName
+                                               andFileType:kServiceInfoFileType
+                                                 inBundles:bundles];
+  if (plistFilePath == nil) {
+    FIRLogError(kFIRLoggerCore, @"I-COR000012", @"Could not locate configuration file: '%@.%@'.",
+                fileName, kServiceInfoFileType);
+  }
+  return plistFilePath;
+}
+
++ (void)resetDefaultOptions {
+  sDefaultOptions = nil;
+  sDefaultOptionsDictionary = nil;
+}
+
+#pragma mark - Private instance methods
+
+- (instancetype)initInternalWithOptionsDictionary:(NSDictionary *)optionsDictionary {
+  self = [super init];
+  if (self) {
+    _optionsDictionary = [optionsDictionary mutableCopy];
+    _usingOptionsFromDefaultPlist = YES;
+  }
+  return self;
+}
+
+- (id)copyWithZone:(NSZone *)zone {
+  FIROptions *newOptions = [[[self class] allocWithZone:zone] init];
+  if (newOptions) {
+    newOptions.optionsDictionary = self.optionsDictionary;
+    newOptions.deepLinkURLScheme = self.deepLinkURLScheme;
+    newOptions.appGroupID = self.appGroupID;
+    newOptions.editingLocked = self.isEditingLocked;
+    newOptions.usingOptionsFromDefaultPlist = self.usingOptionsFromDefaultPlist;
+  }
+  return newOptions;
+}
+
+#pragma mark - Public instance methods
+
+- (instancetype)initWithContentsOfFile:(NSString *)plistPath {
+  self = [super init];
+  if (self) {
+    if (plistPath == nil) {
+      FIRLogError(kFIRLoggerCore, @"I-COR000013", @"The plist file path is nil.");
+      return nil;
+    }
+    _optionsDictionary = [[NSDictionary dictionaryWithContentsOfFile:plistPath] mutableCopy];
+    if (_optionsDictionary == nil) {
+      FIRLogError(kFIRLoggerCore, @"I-COR000014",
+                  @"The configuration file at %@ does not exist or "
+                  @"is not a well-formed plist file.",
+                  plistPath);
+      return nil;
+    }
+    // TODO: Do we want to validate the dictionary here? It says we do that already in
+    // the public header.
+  }
+  return self;
+}
+
+- (instancetype)initWithGoogleAppID:(NSString *)googleAppID GCMSenderID:(NSString *)GCMSenderID {
+  self = [super init];
+  if (self) {
+    NSMutableDictionary *mutableOptionsDict = [NSMutableDictionary dictionary];
+    [mutableOptionsDict setValue:googleAppID forKey:kFIRGoogleAppID];
+    [mutableOptionsDict setValue:GCMSenderID forKey:kFIRGCMSenderID];
+    [mutableOptionsDict setValue:[[NSBundle mainBundle] bundleIdentifier] forKey:kFIRBundleID];
+    self.optionsDictionary = mutableOptionsDict;
+  }
+  return self;
+}
+
+- (NSString *)APIKey {
+  return self.optionsDictionary[kFIRAPIKey];
+}
+
+- (void)checkEditingLocked {
+  if (self.isEditingLocked) {
+    [NSException raise:kFirebaseCoreErrorDomain format:kFIRExceptionBadModification];
+  }
+}
+
+- (void)setAPIKey:(NSString *)APIKey {
+  [self checkEditingLocked];
+  _optionsDictionary[kFIRAPIKey] = [APIKey copy];
+}
+
+- (NSString *)clientID {
+  return self.optionsDictionary[kFIRClientID];
+}
+
+- (void)setClientID:(NSString *)clientID {
+  [self checkEditingLocked];
+  _optionsDictionary[kFIRClientID] = [clientID copy];
+}
+
+- (NSString *)trackingID {
+  return self.optionsDictionary[kFIRTrackingID];
+}
+
+- (void)setTrackingID:(NSString *)trackingID {
+  [self checkEditingLocked];
+  _optionsDictionary[kFIRTrackingID] = [trackingID copy];
+}
+
+- (NSString *)GCMSenderID {
+  return self.optionsDictionary[kFIRGCMSenderID];
+}
+
+- (void)setGCMSenderID:(NSString *)GCMSenderID {
+  [self checkEditingLocked];
+  _optionsDictionary[kFIRGCMSenderID] = [GCMSenderID copy];
+}
+
+- (NSString *)projectID {
+  return self.optionsDictionary[kFIRProjectID];
+}
+
+- (void)setProjectID:(NSString *)projectID {
+  [self checkEditingLocked];
+  _optionsDictionary[kFIRProjectID] = [projectID copy];
+}
+
+- (NSString *)androidClientID {
+  return self.optionsDictionary[kFIRAndroidClientID];
+}
+
+- (void)setAndroidClientID:(NSString *)androidClientID {
+  [self checkEditingLocked];
+  _optionsDictionary[kFIRAndroidClientID] = [androidClientID copy];
+}
+
+- (NSString *)googleAppID {
+  return self.optionsDictionary[kFIRGoogleAppID];
+}
+
+- (void)setGoogleAppID:(NSString *)googleAppID {
+  [self checkEditingLocked];
+  _optionsDictionary[kFIRGoogleAppID] = [googleAppID copy];
+}
+
+- (NSString *)libraryVersionID {
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    // The unit tests are set up to catch anything that does not properly convert.
+    NSString *version = [NSString stringWithUTF8String:FIRCoreVersionString];
+    NSArray *components = [version componentsSeparatedByString:@"."];
+    NSString *major = [components objectAtIndex:0];
+    NSString *minor = [NSString stringWithFormat:@"%02d", [[components objectAtIndex:1] intValue]];
+    NSString *patch = [NSString stringWithFormat:@"%02d", [[components objectAtIndex:2] intValue]];
+    kFIRLibraryVersionID = [NSString stringWithFormat:@"%@%@%@000", major, minor, patch];
+  });
+  return kFIRLibraryVersionID;
+}
+
+- (void)setLibraryVersionID:(NSString *)libraryVersionID {
+  _optionsDictionary[kFIRLibraryVersionID] = [libraryVersionID copy];
+}
+
+- (NSString *)databaseURL {
+  return self.optionsDictionary[kFIRDatabaseURL];
+}
+
+- (void)setDatabaseURL:(NSString *)databaseURL {
+  [self checkEditingLocked];
+
+  _optionsDictionary[kFIRDatabaseURL] = [databaseURL copy];
+}
+
+- (NSString *)storageBucket {
+  return self.optionsDictionary[kFIRStorageBucket];
+}
+
+- (void)setStorageBucket:(NSString *)storageBucket {
+  [self checkEditingLocked];
+  _optionsDictionary[kFIRStorageBucket] = [storageBucket copy];
+}
+
+- (void)setDeepLinkURLScheme:(NSString *)deepLinkURLScheme {
+  [self checkEditingLocked];
+  _deepLinkURLScheme = [deepLinkURLScheme copy];
+}
+
+- (NSString *)bundleID {
+  return self.optionsDictionary[kFIRBundleID];
+}
+
+- (void)setBundleID:(NSString *)bundleID {
+  [self checkEditingLocked];
+  _optionsDictionary[kFIRBundleID] = [bundleID copy];
+}
+
+- (void)setAppGroupID:(NSString *)appGroupID {
+  [self checkEditingLocked];
+  _appGroupID = [appGroupID copy];
+}
+
+#pragma mark - Internal instance methods
+
+- (NSDictionary *)analyticsOptionsDictionaryWithInfoDictionary:(NSDictionary *)infoDictionary {
+  if (_analyticsOptionsDictionary == nil) {
+    NSMutableDictionary *tempAnalyticsOptions = [[NSMutableDictionary alloc] init];
+    NSArray *measurementKeys = @[
+      kFIRIsMeasurementEnabled, kFIRIsAnalyticsCollectionEnabled,
+      kFIRIsAnalyticsCollectionDeactivated
+    ];
+    for (NSString *key in measurementKeys) {
+      id value = infoDictionary[key] ?: self.optionsDictionary[key] ?: nil;
+      if (!value) {
+        continue;
+      }
+      tempAnalyticsOptions[key] = value;
+    }
+    _analyticsOptionsDictionary = tempAnalyticsOptions;
+  }
+  return _analyticsOptionsDictionary;
+}
+
+- (NSDictionary *)analyticsOptionsDictionary {
+  return [self analyticsOptionsDictionaryWithInfoDictionary:[NSBundle mainBundle].infoDictionary];
+}
+
+/**
+ * Whether or not Measurement was enabled. Measurement is enabled unless explicitly disabled in
+ * GoogleService-Info.plist. This uses the old plist flag IS_MEASUREMENT_ENABLED, which should still
+ * be supported.
+ */
+- (BOOL)isMeasurementEnabled {
+  if (self.isAnalyticsCollectionDeactivated) {
+    return NO;
+  }
+  NSNumber *value = self.analyticsOptionsDictionary[kFIRIsMeasurementEnabled];
+  if (value == nil) {
+    // TODO: This could probably be cleaned up since FIROptions shouldn't know about FIRApp or have
+    //       to check if it's the default app. The FIROptions instance can't be modified after
+    //       `+configure` is called, so it's not a good place to copy it either in case the flag is
+    //       changed at runtime.
+
+    // If no values are set for Analytics, fall back to the global collection switch in FIRApp.
+    // Analytics only supports the default FIRApp, so check that first.
+    if (![FIRApp isDefaultAppConfigured]) {
+      return NO;
+    }
+
+    // Fall back to the default app's collection switch when the key is not in the dictionary.
+    return [FIRApp defaultApp].isDataCollectionDefaultEnabled;
+  }
+  return [value boolValue];
+}
+
+- (BOOL)isAnalyticsCollectionExpicitlySet {
+  // If it's de-activated, it classifies as explicity set. If not, it's not a good enough indication
+  // that the developer wants FirebaseAnalytics enabled so continue checking.
+  if (self.isAnalyticsCollectionDeactivated) {
+    return YES;
+  }
+
+  // Check if the current Analytics flag is set.
+  id collectionEnabledObject = self.analyticsOptionsDictionary[kFIRIsAnalyticsCollectionEnabled];
+  if (collectionEnabledObject && [collectionEnabledObject isKindOfClass:[NSNumber class]]) {
+    // It doesn't matter what the value is, it's explicitly set.
+    return YES;
+  }
+
+  // Check if the old measurement flag is set.
+  id measurementEnabledObject = self.analyticsOptionsDictionary[kFIRIsMeasurementEnabled];
+  if (measurementEnabledObject && [measurementEnabledObject isKindOfClass:[NSNumber class]]) {
+    // It doesn't matter what the value is, it's explicitly set.
+    return YES;
+  }
+
+  // No flags are set to explicitly enable or disable FirebaseAnalytics.
+  return NO;
+}
+
+- (BOOL)isAnalyticsCollectionEnabled {
+  if (self.isAnalyticsCollectionDeactivated) {
+    return NO;
+  }
+  NSNumber *value = self.analyticsOptionsDictionary[kFIRIsAnalyticsCollectionEnabled];
+  if (value == nil) {
+    return self.isMeasurementEnabled;  // Fall back to older plist flag.
+  }
+  return [value boolValue];
+}
+
+- (BOOL)isAnalyticsCollectionDeactivated {
+  NSNumber *value = self.analyticsOptionsDictionary[kFIRIsAnalyticsCollectionDeactivated];
+  if (value == nil) {
+    return NO;  // Analytics Collection is not deactivated when the key is not in the dictionary.
+  }
+  return [value boolValue];
+}
+
+- (BOOL)isAnalyticsEnabled {
+  return [self.optionsDictionary[kFIRIsAnalyticsEnabled] boolValue];
+}
+
+- (BOOL)isSignInEnabled {
+  return [self.optionsDictionary[kFIRIsSignInEnabled] boolValue];
+}
+
+@end

Pods/FirebaseCore/Firebase/Core/FIRVersion.m

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef Firebase_VERSION
+#error "Firebase_VERSION is not defined: add -DFirebase_VERSION=... to the build invocation"
+#endif
+
+#ifndef FIRCore_VERSION
+#error "FIRCore_VERSION is not defined: add -DFIRCore_VERSION=... to the build invocation"
+#endif
+
+// The following two macros supply the incantation so that the C
+// preprocessor does not try to parse the version as a floating
+// point number. See
+// https://www.guyrutenberg.com/2008/12/20/expanding-macros-into-string-constants-in-c/
+#define STR(x) STR_EXPAND(x)
+#define STR_EXPAND(x) #x
+
+const char *const FIRVersionString = (const char *const)STR(Firebase_VERSION);
+const char *const FIRCoreVersionString = (const char *const)STR(FIRCore_VERSION);

Pods/FirebaseCore/Firebase/Core/Private/FIRAnalyticsConfiguration.h

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+/// Values stored in analyticsEnabledState. Never alter these constants since they must match with
+/// values persisted to disk.
+typedef NS_ENUM(int64_t, FIRAnalyticsEnabledState) {
+  // 0 is the default value for keys not found stored in persisted config, so it cannot represent
+  // kFIRAnalyticsEnabledStateSetNo. It must represent kFIRAnalyticsEnabledStateNotSet.
+  kFIRAnalyticsEnabledStateNotSet = 0,
+  kFIRAnalyticsEnabledStateSetYes = 1,
+  kFIRAnalyticsEnabledStateSetNo = 2,
+};
+
+/// The user defaults key for the persisted measurementEnabledState value. FIRAPersistedConfig reads
+/// measurementEnabledState using this same key.
+static NSString *const kFIRAPersistedConfigMeasurementEnabledStateKey =
+    @"/google/measurement/measurement_enabled_state";
+
+static NSString *const kFIRAnalyticsConfigurationSetEnabledNotification =
+    @"FIRAnalyticsConfigurationSetEnabledNotification";
+static NSString *const kFIRAnalyticsConfigurationSetMinimumSessionIntervalNotification =
+    @"FIRAnalyticsConfigurationSetMinimumSessionIntervalNotification";
+static NSString *const kFIRAnalyticsConfigurationSetSessionTimeoutIntervalNotification =
+    @"FIRAnalyticsConfigurationSetSessionTimeoutIntervalNotification";
+
+@interface FIRAnalyticsConfiguration : NSObject
+
+/// Returns the shared instance of FIRAnalyticsConfiguration.
++ (FIRAnalyticsConfiguration *)sharedInstance;
+
+// Sets whether analytics collection is enabled for this app on this device. This setting is
+// persisted across app sessions. By default it is enabled.
+- (void)setAnalyticsCollectionEnabled:(BOOL)analyticsCollectionEnabled;
+
+/// Sets whether analytics collection is enabled for this app on this device, and a flag to persist
+/// the value or not. The setting should not be persisted if being set by the global data collection
+/// flag.
+- (void)setAnalyticsCollectionEnabled:(BOOL)analyticsCollectionEnabled
+                       persistSetting:(BOOL)shouldPersist;
+
+@end

Pods/FirebaseCore/Firebase/Core/Private/FIRAppAssociationRegistration.h

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+//  TODO: Remove this once Auth moves over to Core's instance registration system.
+/** @class FIRAppAssociationRegistration
+    @brief Manages object associations as a singleton-dependent: At most one object is
+        registered for any given host/key pair, and the object shall be created on-the-fly when
+        asked for.
+ */
+@interface FIRAppAssociationRegistration<ObjectType> : NSObject
+
+/** @fn registeredObjectWithHost:key:creationBlock:
+    @brief Retrieves the registered object with a particular host and key.
+    @param host The host object.
+    @param key The key to specify the registered object on the host.
+    @param creationBlock The block to return the object to be registered if not already.
+        The block is executed immediately before this method returns if it is executed at all.
+        It can also be executed multiple times across different method invocations if previous
+        execution of the block returns @c nil.
+    @return The registered object for the host/key pair, or @c nil if no object is registered
+        and @c creationBlock returns @c nil.
+    @remarks The method is thread-safe but non-reentrant in the sense that attempting to call this
+        method again within the @c creationBlock with the same host/key pair raises an exception.
+        The registered object is retained by the host.
+ */
++ (nullable ObjectType)registeredObjectWithHost:(id)host
+                                            key:(NSString *)key
+                                  creationBlock:(ObjectType _Nullable (^)(void))creationBlock;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/Firebase/Core/Private/FIRAppInternal.h

@@ -0,0 +1,162 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <FirebaseCore/FIRApp.h>
+#import <FirebaseCore/FIRErrors.h>
+
+@class FIRComponentContainer;
+@protocol FIRLibrary;
+
+/**
+ * The internal interface to FIRApp. This is meant for first-party integrators, who need to receive
+ * FIRApp notifications, log info about the success or failure of their configuration, and access
+ * other internal functionality of FIRApp.
+ *
+ * TODO(b/28296561): Restructure this header.
+ */
+NS_ASSUME_NONNULL_BEGIN
+
+typedef NS_ENUM(NSInteger, FIRConfigType) {
+  FIRConfigTypeCore = 1,
+  FIRConfigTypeSDK = 2,
+};
+
+extern NSString *const kFIRDefaultAppName;
+extern NSString *const kFIRAppReadyToConfigureSDKNotification;
+extern NSString *const kFIRAppDeleteNotification;
+extern NSString *const kFIRAppIsDefaultAppKey;
+extern NSString *const kFIRAppNameKey;
+extern NSString *const kFIRGoogleAppIDKey;
+
+/**
+ * The format string for the User Defaults key used for storing the data collection enabled flag.
+ * This includes formatting to append the Firebase App's name.
+ */
+extern NSString *const kFIRGlobalAppDataCollectionEnabledDefaultsKeyFormat;
+
+/**
+ * The plist key used for storing the data collection enabled flag.
+ */
+extern NSString *const kFIRGlobalAppDataCollectionEnabledPlistKey;
+
+/**
+ * A notification fired containing diagnostic information when SDK errors occur.
+ */
+extern NSString *const kFIRAppDiagnosticsNotification;
+
+/** @var FIRAuthStateDidChangeInternalNotification
+ @brief The name of the @c NSNotificationCenter notification which is posted when the auth state
+ changes (e.g. a new token has been produced, a user logs in or out). The object parameter of
+ the notification is a dictionary possibly containing the key:
+ @c FIRAuthStateDidChangeInternalNotificationTokenKey (the new access token.) If it does not
+ contain this key it indicates a sign-out event took place.
+ */
+extern NSString *const FIRAuthStateDidChangeInternalNotification;
+
+/** @var FIRAuthStateDidChangeInternalNotificationTokenKey
+ @brief A key present in the dictionary object parameter of the
+ @c FIRAuthStateDidChangeInternalNotification notification. The value associated with this
+ key will contain the new access token.
+ */
+extern NSString *const FIRAuthStateDidChangeInternalNotificationTokenKey;
+
+/** @var FIRAuthStateDidChangeInternalNotificationAppKey
+ @brief A key present in the dictionary object parameter of the
+ @c FIRAuthStateDidChangeInternalNotification notification. The value associated with this
+ key will contain the FIRApp associated with the auth instance.
+ */
+extern NSString *const FIRAuthStateDidChangeInternalNotificationAppKey;
+
+/** @var FIRAuthStateDidChangeInternalNotificationUIDKey
+ @brief A key present in the dictionary object parameter of the
+ @c FIRAuthStateDidChangeInternalNotification notification. The value associated with this
+ key will contain the new user's UID (or nil if there is no longer a user signed in).
+ */
+extern NSString *const FIRAuthStateDidChangeInternalNotificationUIDKey;
+
+@interface FIRApp ()
+
+/**
+ * A flag indicating if this is the default app (has the default app name).
+ */
+@property(nonatomic, readonly) BOOL isDefaultApp;
+
+/*
+ * The container of interop SDKs for this app.
+ */
+@property(nonatomic) FIRComponentContainer *container;
+
+/**
+ * Creates an error for failing to configure a subspec service. This method is called by each
+ * FIRApp notification listener.
+ */
++ (NSError *)errorForSubspecConfigurationFailureWithDomain:(NSString *)domain
+                                                 errorCode:(FIRErrorCode)code
+                                                   service:(NSString *)service
+                                                    reason:(NSString *)reason;
+/**
+ * Checks if the default app is configured without trying to configure it.
+ */
++ (BOOL)isDefaultAppConfigured;
+
+/**
+ * Registers a given third-party library with the given version number to be reported for
+ * analytics.
+ *
+ * @param name Name of the library.
+ * @param version Version of the library.
+ */
++ (void)registerLibrary:(nonnull NSString *)name withVersion:(nonnull NSString *)version;
+
+/**
+ * Registers a given internal library with the given version number to be reported for
+ * analytics.
+ *
+ * @param library Optional parameter for component registration.
+ * @param name Name of the library.
+ * @param version Version of the library.
+ */
++ (void)registerInternalLibrary:(nonnull Class<FIRLibrary>)library
+                       withName:(nonnull NSString *)name
+                    withVersion:(nonnull NSString *)version;
+
+/**
+ * A concatenated string representing all the third-party libraries and version numbers.
+ */
++ (NSString *)firebaseUserAgent;
+
+/**
+ * Used by each SDK to send logs about SDK configuration status to Clearcut.
+ *
+ * @note This API is a no-op, please remove calls to it.
+ */
+- (void)sendLogsWithServiceName:(NSString *)serviceName
+                        version:(NSString *)version
+                          error:(NSError *)error;
+
+/**
+ * Can be used by the unit tests in eack SDK to reset FIRApp. This method is thread unsafe.
+ */
++ (void)resetApps;
+
+/**
+ * Can be used by the unit tests in each SDK to set customized options.
+ */
+- (instancetype)initInstanceWithName:(NSString *)name options:(FIROptions *)options;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/Firebase/Core/Private/FIRBundleUtil.h

@@ -0,0 +1,53 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+/**
+ * This class provides utilities for accessing resources in bundles.
+ */
+@interface FIRBundleUtil : NSObject
+
+/**
+ * Finds all relevant bundles, starting with [NSBundle mainBundle].
+ */
++ (NSArray *)relevantBundles;
+
+/**
+ * Reads the options dictionary from one of the provided bundles.
+ *
+ * @param resourceName The resource name, e.g. @"GoogleService-Info".
+ * @param fileType The file type (extension), e.g. @"plist".
+ * @param bundles The bundles to expect, in priority order. See also
+ * +[FIRBundleUtil relevantBundles].
+ */
++ (NSString *)optionsDictionaryPathWithResourceName:(NSString *)resourceName
+                                        andFileType:(NSString *)fileType
+                                          inBundles:(NSArray *)bundles;
+
+/**
+ * Finds URL schemes defined in all relevant bundles, starting with those from
+ * [NSBundle mainBundle].
+ */
++ (NSArray *)relevantURLSchemes;
+
+/**
+ * Checks if any of the given bundles have a matching bundle identifier prefix (removing extension
+ * suffixes).
+ */
++ (BOOL)hasBundleIdentifierPrefix:(NSString *)bundleIdentifier inBundles:(NSArray *)bundles;
+
+@end

Pods/FirebaseCore/Firebase/Core/Private/FIRComponent.h

@@ -0,0 +1,91 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+@class FIRApp;
+@class FIRComponentContainer;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/// Provides a system to clean up cached instances returned from the component system.
+NS_SWIFT_NAME(ComponentLifecycleMaintainer)
+@protocol FIRComponentLifecycleMaintainer
+/// The associated app will be deleted, clean up any resources as they are about to be deallocated.
+- (void)appWillBeDeleted:(FIRApp *)app;
+@end
+
+typedef _Nullable id (^FIRComponentCreationBlock)(FIRComponentContainer *container,
+                                                  BOOL *isCacheable)
+    NS_SWIFT_NAME(ComponentCreationBlock);
+
+@class FIRDependency;
+
+/// Describes the timing of instantiation. Note: new components should default to lazy unless there
+/// is a strong reason to be eager.
+typedef NS_ENUM(NSInteger, FIRInstantiationTiming) {
+  FIRInstantiationTimingLazy,
+  FIRInstantiationTimingAlwaysEager,
+  FIRInstantiationTimingEagerInDefaultApp
+} NS_SWIFT_NAME(InstantiationTiming);
+
+/// A component that can be used from other Firebase SDKs.
+NS_SWIFT_NAME(Component)
+@interface FIRComponent : NSObject
+
+/// The protocol describing functionality provided from the Component.
+@property(nonatomic, strong, readonly) Protocol *protocol;
+
+/// The timing of instantiation.
+@property(nonatomic, readonly) FIRInstantiationTiming instantiationTiming;
+
+/// An array of dependencies for the component.
+@property(nonatomic, copy, readonly) NSArray<FIRDependency *> *dependencies;
+
+/// A block to instantiate an instance of the component with the appropriate dependencies.
+@property(nonatomic, copy, readonly) FIRComponentCreationBlock creationBlock;
+
+// There's an issue with long NS_SWIFT_NAMES that causes compilation to fail, disable clang-format
+// for the next two methods.
+// clang-format off
+
+/// Creates a component with no dependencies that will be lazily initialized.
++ (instancetype)componentWithProtocol:(Protocol *)protocol
+                        creationBlock:(FIRComponentCreationBlock)creationBlock
+NS_SWIFT_NAME(init(_:creationBlock:));
+
+/// Creates a component to be registered with the component container.
+///
+/// @param protocol - The protocol describing functionality provided by the component.
+/// @param instantiationTiming - When the component should be initialized. Use .lazy unless there's
+///                              a good reason to be instantiated earlier.
+/// @param dependencies - Any dependencies the `implementingClass` has, optional or required.
+/// @param creationBlock - A block to instantiate the component with a container, and if
+/// @return A component that can be registered with the component container.
++ (instancetype)componentWithProtocol:(Protocol *)protocol
+                  instantiationTiming:(FIRInstantiationTiming)instantiationTiming
+                         dependencies:(NSArray<FIRDependency *> *)dependencies
+                        creationBlock:(FIRComponentCreationBlock)creationBlock
+NS_SWIFT_NAME(init(_:instantiationTiming:dependencies:creationBlock:));
+
+// clang-format on
+
+/// Unavailable.
+- (instancetype)init NS_UNAVAILABLE;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/Firebase/Core/Private/FIRComponentContainer.h

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#import <Foundation/Foundation.h>
+
+#import "FIRComponentType.h"
+#import "FIRLibrary.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/// A type-safe macro to retrieve a component from a container. This should be used to retrieve
+/// components instead of using the container directly.
+#define FIR_COMPONENT(type, container) \
+  [FIRComponentType<id<type>> instanceForProtocol:@protocol(type) inContainer:container]
+
+@class FIRApp;
+
+/// A container that holds different components that are registered via the
+/// `registerAsComponentRegistrant:` call. These classes should conform to `FIRComponentRegistrant`
+/// in order to properly register components for Core.
+NS_SWIFT_NAME(FirebaseComponentContainer)
+@interface FIRComponentContainer : NSObject
+
+/// A weak reference to the app that an instance of the container belongs to.
+@property(nonatomic, weak, readonly) FIRApp *app;
+
+/// Unavailable. Use the `container` property on `FIRApp`.
+- (instancetype)init NS_UNAVAILABLE;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/Firebase/Core/Private/FIRComponentContainerInternal.h

@@ -0,0 +1,43 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#import <Foundation/Foundation.h>
+
+#import "FIRComponent.h"
+#import "FIRComponentContainer.h"
+
+@class FIRApp;
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface FIRComponentContainer (Private)
+
+/// Initializes a contain for a given app. This should only be called by the app itself.
+- (instancetype)initWithApp:(FIRApp *)app;
+
+/// Retrieves an instance that conforms to the specified protocol. This will return `nil` if the
+/// protocol wasn't registered, or if the instance couldn't instantiate for the provided app.
+- (nullable id)instanceForProtocol:(Protocol *)protocol NS_SWIFT_NAME(instance(for:));
+
+/// Remove all of the cached instances stored and allow them to clean up after themselves.
+- (void)removeAllCachedInstances;
+
+/// Register a class to provide components for the interoperability system. The class should conform
+/// to `FIRComponentRegistrant` and provide an array of `FIRComponent` objects.
++ (void)registerAsComponentRegistrant:(Class<FIRLibrary>)klass;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/Firebase/Core/Private/FIRComponentType.h

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+@class FIRComponentContainer;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/// Do not use directly. A placeholder type in order to provide a macro that will warn users of
+/// mis-matched protocols.
+NS_SWIFT_NAME(ComponentType)
+@interface FIRComponentType<__covariant T> : NSObject
+
+/// Do not use directly. A factory method to retrieve an instance that provides a specific
+/// functionality.
++ (T)instanceForProtocol:(Protocol *)protocol inContainer:(FIRComponentContainer *)container;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/Firebase/Core/Private/FIRConfigurationInternal.h

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FIRConfiguration.h"
+
+@class FIRAnalyticsConfiguration;
+
+@interface FIRConfiguration ()
+
+/**
+ * The configuration class for Firebase Analytics. This should be removed once the logic for
+ * enabling and disabling Analytics is moved to Analytics.
+ */
+@property(nonatomic, readwrite) FIRAnalyticsConfiguration *analyticsConfiguration;
+
+@end

Pods/FirebaseCore/Firebase/Core/Private/FIRCoreDiagnosticsConnector.h

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+@class FIRDiagnosticsData;
+@class FIROptions;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/** Connects FIRCore with the CoreDiagnostics library. */
+@interface FIRCoreDiagnosticsConnector : NSObject
+
+/** Logs FirebaseCore  related data.
+ *
+ * @param options The options object containing data to log.
+ */
++ (void)logCoreTelemetryWithOptions:(FIROptions *)options;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/Firebase/Core/Private/FIRDependency.h

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/// A dependency on a specific protocol's functionality.
+NS_SWIFT_NAME(Dependency)
+@interface FIRDependency : NSObject
+
+/// The protocol describing functionality being depended on.
+@property(nonatomic, strong, readonly) Protocol *protocol;
+
+/// A flag to specify if the dependency is required or not.
+@property(nonatomic, readonly) BOOL isRequired;
+
+/// Initializes a dependency that is required. Calls `initWithProtocol:isRequired` with `YES` for
+/// the required parameter.
+/// Creates a required dependency on the specified protocol's functionality.
++ (instancetype)dependencyWithProtocol:(Protocol *)protocol;
+
+/// Creates a dependency on the specified protocol's functionality and specify if it's required for
+/// the class's functionality.
++ (instancetype)dependencyWithProtocol:(Protocol *)protocol isRequired:(BOOL)required;
+
+/// Use `dependencyWithProtocol:isRequired:` instead.
+- (instancetype)init NS_UNAVAILABLE;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/Firebase/Core/Private/FIRDiagnosticsData.h

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+#import <FirebaseCoreDiagnosticsInterop/FIRCoreDiagnosticsData.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/** Implements the FIRCoreDiagnosticsData protocol to log diagnostics data. */
+@interface FIRDiagnosticsData : NSObject <FIRCoreDiagnosticsData>
+
+/** Inserts values into the diagnosticObjects dictionary if the value isn't nil.
+ *
+ * @param value The value to insert if it's not nil.
+ * @param key The key to associate it with.
+ */
+- (void)insertValue:(nullable id)value forKey:(NSString *)key;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/Firebase/Core/Private/FIRErrorCode.h

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/** Error codes in Firebase error domain. */
+typedef NS_ENUM(NSInteger, FIRErrorCode) {
+  /**
+   * Unknown error.
+   */
+  FIRErrorCodeUnknown = 0,
+  /**
+   * Loading data from the GoogleService-Info.plist file failed. This is a fatal error and should
+   * not be ignored. Further calls to the API will fail and/or possibly cause crashes.
+   */
+  FIRErrorCodeInvalidPlistFile = -100,
+
+  /**
+   * Validating the Google App ID format failed.
+   */
+  FIRErrorCodeInvalidAppID = -101,
+
+  /**
+   * Error code for failing to configure a specific service.
+   */
+  FIRErrorCodeConfigFailed = -114,
+};

Pods/FirebaseCore/Firebase/Core/Private/FIRErrors.h

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+#include "FIRErrorCode.h"
+
+extern NSString *const kFirebaseErrorDomain;
+extern NSString *const kFirebaseConfigErrorDomain;
+extern NSString *const kFirebaseCoreErrorDomain;
+extern NSString *const kFirebasePerfErrorDomain;

Pods/FirebaseCore/Firebase/Core/Private/FIRLibrary.h

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2018 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef FIRLibrary_h
+#define FIRLibrary_h
+
+#import <Foundation/Foundation.h>
+#import "FIRComponent.h"
+
+@class FIRApp;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/// Provide an interface to register a library for userAgent logging and availability to others.
+NS_SWIFT_NAME(Library)
+@protocol FIRLibrary
+
+/// Returns one or more FIRComponents that will be registered in
+/// FIRApp and participate in dependency resolution and injection.
++ (NSArray<FIRComponent *> *)componentsToRegister;
+
+@optional
+/// Implement this method if the library needs notifications for lifecycle events. This method is
+/// called when the developer calls `FirebaseApp.configure()`.
++ (void)configureWithApp:(FIRApp *)app;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif /* FIRLibrary_h */

Pods/FirebaseCore/Firebase/Core/Private/FIRLogger.h

@@ -0,0 +1,151 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+#import <FirebaseCore/FIRLoggerLevel.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * The Firebase services used in Firebase logger.
+ */
+typedef NSString *const FIRLoggerService;
+
+extern FIRLoggerService kFIRLoggerABTesting;
+extern FIRLoggerService kFIRLoggerAdMob;
+extern FIRLoggerService kFIRLoggerAnalytics;
+extern FIRLoggerService kFIRLoggerAuth;
+extern FIRLoggerService kFIRLoggerCrash;
+extern FIRLoggerService kFIRLoggerCore;
+extern FIRLoggerService kFIRLoggerMLKit;
+extern FIRLoggerService kFIRLoggerPerf;
+extern FIRLoggerService kFIRLoggerRemoteConfig;
+
+/**
+ * The key used to store the logger's error count.
+ */
+extern NSString *const kFIRLoggerErrorCountKey;
+
+/**
+ * The key used to store the logger's warning count.
+ */
+extern NSString *const kFIRLoggerWarningCountKey;
+
+#ifdef __cplusplus
+extern "C" {
+#endif  // __cplusplus
+
+/**
+ * Enables or disables Analytics debug mode.
+ * If set to YES, the logging level for Analytics will be set to FIRLoggerLevelDebug.
+ * Enabling the debug mode has no effect if the app is running from App Store.
+ * (required) analytics debug mode flag.
+ */
+void FIRSetAnalyticsDebugMode(BOOL analyticsDebugMode);
+
+/**
+ * Changes the default logging level of FIRLoggerLevelNotice to a user-specified level.
+ * The default level cannot be set above FIRLoggerLevelNotice if the app is running from App Store.
+ * (required) log level (one of the FIRLoggerLevel enum values).
+ */
+void FIRSetLoggerLevel(FIRLoggerLevel loggerLevel);
+
+/**
+ * Checks if the specified logger level is loggable given the current settings.
+ * (required) log level (one of the FIRLoggerLevel enum values).
+ * (required) whether or not this function is called from the Analytics component.
+ */
+BOOL FIRIsLoggableLevel(FIRLoggerLevel loggerLevel, BOOL analyticsComponent);
+
+/**
+ * Logs a message to the Xcode console and the device log. If running from AppStore, will
+ * not log any messages with a level higher than FIRLoggerLevelNotice to avoid log spamming.
+ * (required) log level (one of the FIRLoggerLevel enum values).
+ * (required) service name of type FIRLoggerService.
+ * (required) message code starting with "I-" which means iOS, followed by a capitalized
+ *            three-character service identifier and a six digit integer message ID that is unique
+ *            within the service.
+ *            An example of the message code is @"I-COR000001".
+ * (required) message string which can be a format string.
+ * (optional) variable arguments list obtained from calling va_start, used when message is a format
+ *            string.
+ */
+extern void FIRLogBasic(FIRLoggerLevel level,
+                        FIRLoggerService service,
+                        NSString *messageCode,
+                        NSString *message,
+// On 64-bit simulators, va_list is not a pointer, so cannot be marked nullable
+// See: http://stackoverflow.com/q/29095469
+#if __LP64__ && TARGET_OS_SIMULATOR || TARGET_OS_OSX
+                        va_list args_ptr
+#else
+                        va_list _Nullable args_ptr
+#endif
+);
+
+/**
+ * The following functions accept the following parameters in order:
+ * (required) service name of type FIRLoggerService.
+ * (required) message code starting from "I-" which means iOS, followed by a capitalized
+ *            three-character service identifier and a six digit integer message ID that is unique
+ *            within the service.
+ *            An example of the message code is @"I-COR000001".
+ *            See go/firebase-log-proposal for details.
+ * (required) message string which can be a format string.
+ * (optional) the list of arguments to substitute into the format string.
+ * Example usage:
+ * FIRLogError(kFIRLoggerCore, @"I-COR000001", @"Configuration of %@ failed.", app.name);
+ */
+extern void FIRLogError(FIRLoggerService service, NSString *messageCode, NSString *message, ...)
+    NS_FORMAT_FUNCTION(3, 4);
+extern void FIRLogWarning(FIRLoggerService service, NSString *messageCode, NSString *message, ...)
+    NS_FORMAT_FUNCTION(3, 4);
+extern void FIRLogNotice(FIRLoggerService service, NSString *messageCode, NSString *message, ...)
+    NS_FORMAT_FUNCTION(3, 4);
+extern void FIRLogInfo(FIRLoggerService service, NSString *messageCode, NSString *message, ...)
+    NS_FORMAT_FUNCTION(3, 4);
+extern void FIRLogDebug(FIRLoggerService service, NSString *messageCode, NSString *message, ...)
+    NS_FORMAT_FUNCTION(3, 4);
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif  // __cplusplus
+
+@interface FIRLoggerWrapper : NSObject
+
+/**
+ * Objective-C wrapper for FIRLogBasic to allow weak linking to FIRLogger
+ * (required) log level (one of the FIRLoggerLevel enum values).
+ * (required) service name of type FIRLoggerService.
+ * (required) message code starting with "I-" which means iOS, followed by a capitalized
+ *            three-character service identifier and a six digit integer message ID that is unique
+ *            within the service.
+ *            An example of the message code is @"I-COR000001".
+ * (required) message string which can be a format string.
+ * (optional) variable arguments list obtained from calling va_start, used when message is a format
+ *            string.
+ */
+
++ (void)logWithLevel:(FIRLoggerLevel)level
+         withService:(FIRLoggerService)service
+            withCode:(NSString *)messageCode
+         withMessage:(NSString *)message
+            withArgs:(va_list)args;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/Firebase/Core/Private/FIROptionsInternal.h

@@ -0,0 +1,114 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <FirebaseCore/FIROptions.h>
+
+/**
+ * Keys for the strings in the plist file.
+ */
+extern NSString *const kFIRAPIKey;
+extern NSString *const kFIRTrackingID;
+extern NSString *const kFIRGoogleAppID;
+extern NSString *const kFIRClientID;
+extern NSString *const kFIRGCMSenderID;
+extern NSString *const kFIRAndroidClientID;
+extern NSString *const kFIRDatabaseURL;
+extern NSString *const kFIRStorageBucket;
+extern NSString *const kFIRBundleID;
+extern NSString *const kFIRProjectID;
+
+/**
+ * Keys for the plist file name
+ */
+extern NSString *const kServiceInfoFileName;
+
+extern NSString *const kServiceInfoFileType;
+
+/**
+ * This header file exposes the initialization of FIROptions to internal use.
+ */
+@interface FIROptions ()
+
+/**
+ * resetDefaultOptions and initInternalWithOptionsDictionary: are exposed only for unit tests.
+ */
++ (void)resetDefaultOptions;
+
+/**
+ * Initializes the options with dictionary. The above strings are the keys of the dictionary.
+ * This is the designated initializer.
+ */
+- (instancetype)initInternalWithOptionsDictionary:(NSDictionary *)serviceInfoDictionary;
+
+/**
+ * defaultOptions and defaultOptionsDictionary are exposed in order to be used in FIRApp and
+ * other first party services.
+ */
++ (FIROptions *)defaultOptions;
+
++ (NSDictionary *)defaultOptionsDictionary;
+
+/**
+ * Indicates whether or not Analytics collection was explicitly enabled via a plist flag or at
+ * runtime.
+ */
+@property(nonatomic, readonly) BOOL isAnalyticsCollectionExpicitlySet;
+
+/**
+ * Whether or not Analytics Collection was enabled. Analytics Collection is enabled unless
+ * explicitly disabled in GoogleService-Info.plist.
+ */
+@property(nonatomic, readonly) BOOL isAnalyticsCollectionEnabled;
+
+/**
+ * Whether or not Analytics Collection was completely disabled. If YES, then
+ * isAnalyticsCollectionEnabled will be NO.
+ */
+@property(nonatomic, readonly) BOOL isAnalyticsCollectionDeactivated;
+
+/**
+ * The version ID of the client library, e.g. @"1100000".
+ */
+@property(nonatomic, readonly, copy) NSString *libraryVersionID;
+
+/**
+ * The flag indicating whether this object was constructed with the values in the default plist
+ * file.
+ */
+@property(nonatomic) BOOL usingOptionsFromDefaultPlist;
+
+/**
+ * Whether or not Measurement was enabled. Measurement is enabled unless explicitly disabled in
+ * GoogleService-Info.plist.
+ */
+@property(nonatomic, readonly) BOOL isMeasurementEnabled;
+
+/**
+ * Whether or not Analytics was enabled in the developer console.
+ */
+@property(nonatomic, readonly) BOOL isAnalyticsEnabled;
+
+/**
+ * Whether or not SignIn was enabled in the developer console.
+ */
+@property(nonatomic, readonly) BOOL isSignInEnabled;
+
+/**
+ * Whether or not editing is locked. This should occur after FIROptions has been set on a FIRApp.
+ */
+@property(nonatomic, getter=isEditingLocked) BOOL editingLocked;
+
+@end

Pods/FirebaseCore/Firebase/Core/Private/FIRVersion.h

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+/** The version of the Firebase SDK. */
+FOUNDATION_EXPORT const char *const FIRVersionString;
+
+/** The version of the FirebaseCore Component. */
+FOUNDATION_EXPORT const char *const FIRCoreVersionString;

Pods/FirebaseCore/Firebase/Core/Public/FIRApp.h

@@ -0,0 +1,127 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+@class FIROptions;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/** A block that takes a BOOL and has no return value. */
+typedef void (^FIRAppVoidBoolCallback)(BOOL success) NS_SWIFT_NAME(FirebaseAppVoidBoolCallback);
+
+/**
+ * The entry point of Firebase SDKs.
+ *
+ * Initialize and configure FIRApp using +[FIRApp configure]
+ * or other customized ways as shown below.
+ *
+ * The logging system has two modes: default mode and debug mode. In default mode, only logs with
+ * log level Notice, Warning and Error will be sent to device. In debug mode, all logs will be sent
+ * to device. The log levels that Firebase uses are consistent with the ASL log levels.
+ *
+ * Enable debug mode by passing the -FIRDebugEnabled argument to the application. You can add this
+ * argument in the application's Xcode scheme. When debug mode is enabled via -FIRDebugEnabled,
+ * further executions of the application will also be in debug mode. In order to return to default
+ * mode, you must explicitly disable the debug mode with the application argument -FIRDebugDisabled.
+ *
+ * It is also possible to change the default logging level in code by calling setLoggerLevel: on
+ * the FIRConfiguration interface.
+ */
+NS_SWIFT_NAME(FirebaseApp)
+@interface FIRApp : NSObject
+
+/**
+ * Configures a default Firebase app. Raises an exception if any configuration step fails. The
+ * default app is named "__FIRAPP_DEFAULT". This method should be called after the app is launched
+ * and before using Firebase services. This method is thread safe and contains synchronous file I/O
+ * (reading GoogleService-Info.plist from disk).
+ */
++ (void)configure;
+
+/**
+ * Configures the default Firebase app with the provided options. The default app is named
+ * "__FIRAPP_DEFAULT". Raises an exception if any configuration step fails. This method is thread
+ * safe.
+ *
+ * @param options The Firebase application options used to configure the service.
+ */
++ (void)configureWithOptions:(FIROptions *)options NS_SWIFT_NAME(configure(options:));
+
+/**
+ * Configures a Firebase app with the given name and options. Raises an exception if any
+ * configuration step fails. This method is thread safe.
+ *
+ * @param name The application's name given by the developer. The name should should only contain
+               Letters, Numbers and Underscore.
+ * @param options The Firebase application options used to configure the services.
+ */
+// clang-format off
++ (void)configureWithName:(NSString *)name
+                  options:(FIROptions *)options NS_SWIFT_NAME(configure(name:options:));
+// clang-format on
+
+/**
+ * Returns the default app, or nil if the default app does not exist.
+ */
++ (nullable FIRApp *)defaultApp NS_SWIFT_NAME(app());
+
+/**
+ * Returns a previously created FIRApp instance with the given name, or nil if no such app exists.
+ * This method is thread safe.
+ */
++ (nullable FIRApp *)appNamed:(NSString *)name NS_SWIFT_NAME(app(name:));
+
+/**
+ * Returns the set of all extant FIRApp instances, or nil if there are no FIRApp instances. This
+ * method is thread safe.
+ */
+@property(class, readonly, nullable) NSDictionary<NSString *, FIRApp *> *allApps;
+
+/**
+ * Cleans up the current FIRApp, freeing associated data and returning its name to the pool for
+ * future use. This method is thread safe.
+ */
+- (void)deleteApp:(FIRAppVoidBoolCallback)completion;
+
+/**
+ * FIRApp instances should not be initialized directly. Call +[FIRApp configure],
+ * +[FIRApp configureWithOptions:], or +[FIRApp configureWithNames:options:] directly.
+ */
+- (instancetype)init NS_UNAVAILABLE;
+
+/**
+ * Gets the name of this app.
+ */
+@property(nonatomic, copy, readonly) NSString *name;
+
+/**
+ * Gets a copy of the options for this app. These are non-modifiable.
+ */
+@property(nonatomic, copy, readonly) FIROptions *options;
+
+/**
+ * Gets or sets whether automatic data collection is enabled for all products. Defaults to `YES`
+ * unless `FirebaseDataCollectionDefaultEnabled` is set to `NO` in your app's Info.plist. This value
+ * is persisted across runs of the app so that it can be set once when users have consented to
+ * collection.
+ */
+@property(nonatomic, readwrite, getter=isDataCollectionDefaultEnabled)
+    BOOL dataCollectionDefaultEnabled;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/Firebase/Core/Public/FIRConfiguration.h

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+#import <FirebaseCore/FIRLoggerLevel.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * This interface provides global level properties that the developer can tweak.
+ */
+NS_SWIFT_NAME(FirebaseConfiguration)
+@interface FIRConfiguration : NSObject
+
+/** Returns the shared configuration object. */
+@property(class, nonatomic, readonly) FIRConfiguration *sharedInstance NS_SWIFT_NAME(shared);
+
+/**
+ * Sets the logging level for internal Firebase logging. Firebase will only log messages
+ * that are logged at or below loggerLevel. The messages are logged both to the Xcode
+ * console and to the device's log. Note that if an app is running from AppStore, it will
+ * never log above FIRLoggerLevelNotice even if loggerLevel is set to a higher (more verbose)
+ * setting.
+ *
+ * @param loggerLevel The maximum logging level. The default level is set to FIRLoggerLevelNotice.
+ */
+- (void)setLoggerLevel:(FIRLoggerLevel)loggerLevel;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/Firebase/Core/Public/FIRLoggerLevel.h

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// Note that importing GULLoggerLevel.h will lead to a non-modular header
+// import error.
+
+/**
+ * The log levels used by internal logging.
+ */
+typedef NS_ENUM(NSInteger, FIRLoggerLevel) {
+  /** Error level, matches ASL_LEVEL_ERR. */
+  FIRLoggerLevelError = 3,
+  /** Warning level, matches ASL_LEVEL_WARNING. */
+  FIRLoggerLevelWarning = 4,
+  /** Notice level, matches ASL_LEVEL_NOTICE. */
+  FIRLoggerLevelNotice = 5,
+  /** Info level, matches ASL_LEVEL_INFO. */
+  FIRLoggerLevelInfo = 6,
+  /** Debug level, matches ASL_LEVEL_DEBUG. */
+  FIRLoggerLevelDebug = 7,
+  /** Minimum log level. */
+  FIRLoggerLevelMin = FIRLoggerLevelError,
+  /** Maximum log level. */
+  FIRLoggerLevelMax = FIRLoggerLevelDebug
+} NS_SWIFT_NAME(FirebaseLoggerLevel);

Pods/FirebaseCore/Firebase/Core/Public/FIROptions.h

@@ -0,0 +1,123 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * This class provides constant fields of Google APIs.
+ */
+NS_SWIFT_NAME(FirebaseOptions)
+@interface FIROptions : NSObject <NSCopying>
+
+/**
+ * Returns the default options. The first time this is called it synchronously reads
+ * GoogleService-Info.plist from disk.
+ */
++ (nullable FIROptions *)defaultOptions NS_SWIFT_NAME(defaultOptions());
+
+/**
+ * An iOS API key used for authenticating requests from your app, e.g.
+ * @"AIzaSyDdVgKwhZl0sTTTLZ7iTmt1r3N2cJLnaDk", used to identify your app to Google servers.
+ */
+@property(nonatomic, copy, nullable) NSString *APIKey NS_SWIFT_NAME(apiKey);
+
+/**
+ * The bundle ID for the application. Defaults to `[[NSBundle mainBundle] bundleID]` when not set
+ * manually or in a plist.
+ */
+@property(nonatomic, copy) NSString *bundleID;
+
+/**
+ * The OAuth2 client ID for iOS application used to authenticate Google users, for example
+ * @"12345.apps.googleusercontent.com", used for signing in with Google.
+ */
+@property(nonatomic, copy, nullable) NSString *clientID;
+
+/**
+ * The tracking ID for Google Analytics, e.g. @"UA-12345678-1", used to configure Google Analytics.
+ */
+@property(nonatomic, copy, nullable) NSString *trackingID;
+
+/**
+ * The Project Number from the Google Developer's console, for example @"012345678901", used to
+ * configure Google Cloud Messaging.
+ */
+@property(nonatomic, copy) NSString *GCMSenderID NS_SWIFT_NAME(gcmSenderID);
+
+/**
+ * The Project ID from the Firebase console, for example @"abc-xyz-123".
+ */
+@property(nonatomic, copy, nullable) NSString *projectID;
+
+/**
+ * The Android client ID used in Google AppInvite when an iOS app has its Android version, for
+ * example @"12345.apps.googleusercontent.com".
+ */
+@property(nonatomic, copy, nullable) NSString *androidClientID;
+
+/**
+ * The Google App ID that is used to uniquely identify an instance of an app.
+ */
+@property(nonatomic, copy) NSString *googleAppID;
+
+/**
+ * The database root URL, e.g. @"http://abc-xyz-123.firebaseio.com".
+ */
+@property(nonatomic, copy, nullable) NSString *databaseURL;
+
+/**
+ * The URL scheme used to set up Durable Deep Link service.
+ */
+@property(nonatomic, copy, nullable) NSString *deepLinkURLScheme;
+
+/**
+ * The Google Cloud Storage bucket name, e.g. @"abc-xyz-123.storage.firebase.com".
+ */
+@property(nonatomic, copy, nullable) NSString *storageBucket;
+
+/**
+ * The App Group identifier to share data between the application and the application extensions.
+ * The App Group must be configured in the application and on the Apple Developer Portal. Default
+ * value `nil`.
+ */
+@property(nonatomic, copy, nullable) NSString *appGroupID;
+
+/**
+ * Initializes a customized instance of FIROptions from the file at the given plist file path. This
+ * will read the file synchronously from disk.
+ * For example,
+ * NSString *filePath =
+ *     [[NSBundle mainBundle] pathForResource:@"GoogleService-Info" ofType:@"plist"];
+ * FIROptions *options = [[FIROptions alloc] initWithContentsOfFile:filePath];
+ * Returns nil if the plist file does not exist or is invalid.
+ */
+- (nullable instancetype)initWithContentsOfFile:(NSString *)plistPath;
+
+/**
+ * Initializes a customized instance of FIROptions with required fields. Use the mutable properties
+ * to modify fields for configuring specific services.
+ */
+// clang-format off
+- (instancetype)initWithGoogleAppID:(NSString *)googleAppID
+                        GCMSenderID:(NSString *)GCMSenderID
+    NS_SWIFT_NAME(init(googleAppID:gcmSenderID:));
+// clang-format on
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCore/Firebase/Core/Public/FirebaseCore.h

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FIRApp.h"
+#import "FIRConfiguration.h"
+#import "FIRLoggerLevel.h"
+#import "FIROptions.h"

Pods/FirebaseCore/LICENSE

@@ -0,0 +1,202 @@
+
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+   limitations under the License.

Pods/FirebaseCore/README.md

@@ -0,0 +1,223 @@
+# Firebase iOS Open Source Development [![Build Status](https://travis-ci.org/firebase/firebase-ios-sdk.svg?branch=master)](https://travis-ci.org/firebase/firebase-ios-sdk)
+
+This repository contains a subset of the Firebase iOS SDK source. It currently
+includes FirebaseCore, FirebaseAuth, FirebaseDatabase, FirebaseFirestore,
+FirebaseFunctions, FirebaseInstanceID, FirebaseInAppMessaging,
+FirebaseInAppMessagingDisplay, FirebaseMessaging and FirebaseStorage.
+
+The repository also includes GoogleUtilities source. The
+[GoogleUtilities](GoogleUtilities/README.md) pod is
+a set of utilities used by Firebase and other Google products.
+
+Firebase is an app development platform with tools to help you build, grow and
+monetize your app. More information about Firebase can be found at
+[https://firebase.google.com](https://firebase.google.com).
+
+## Installation
+
+See the three subsections for details about three different installation methods.
+1. [Standard pod install](README.md#standard-pod-install)
+1. [Installing from the GitHub repo](README.md#installing-from-github)
+1. [Experimental Carthage](README.md#carthage-ios-only)
+
+### Standard pod install
+
+Go to
+[https://firebase.google.com/docs/ios/setup](https://firebase.google.com/docs/ios/setup).
+
+### Installing from GitHub
+
+For releases starting with 5.0.0, the source for each release is also deployed
+to CocoaPods master and available via standard
+[CocoaPods Podfile syntax](https://guides.cocoapods.org/syntax/podfile.html#pod).
+
+These instructions can be used to access the Firebase repo at other branches,
+tags, or commits.
+
+#### Background
+
+See
+[the Podfile Syntax Reference](https://guides.cocoapods.org/syntax/podfile.html#pod)
+for instructions and options about overriding pod source locations.
+
+#### Accessing Firebase Source Snapshots
+
+All of the official releases are tagged in this repo and available via CocoaPods. To access a local
+source snapshot or unreleased branch, use Podfile directives like the following:
+
+To access FirebaseFirestore via a branch:
+```
+pod 'FirebaseCore', :git => 'https://github.com/firebase/firebase-ios-sdk.git', :branch => 'master'
+pod 'FirebaseFirestore', :git => 'https://github.com/firebase/firebase-ios-sdk.git', :branch => 'master'
+```
+
+To access FirebaseMessaging via a checked out version of the firebase-ios-sdk repo do:
+
+```
+pod 'FirebaseCore', :path => '/path/to/firebase-ios-sdk'
+pod 'FirebaseMessaging', :path => '/path/to/firebase-ios-sdk'
+```
+
+### Carthage (iOS only)
+
+Instructions for the experimental Carthage distribution are at
+[Carthage](Carthage.md).
+
+### Rome
+
+Instructions for installing binary frameworks via
+[Rome](https://github.com/CocoaPods/Rome) are at [Rome](Rome.md).
+
+## Development
+
+To develop Firebase software in this repository, ensure that you have at least
+the following software:
+
+  * Xcode 10.1 (or later)
+  * CocoaPods 1.7.2 (or later)
+
+For the pod that you want to develop:
+
+`pod gen Firebase{name here}.podspec --local-sources=./ --auto-open`
+
+Firestore and Functions have self contained Xcode projects. See
+[Firestore/README.md](Firestore/README.md) and
+[Functions/README.md](Functions/README.md).
+
+### Adding a New Firebase Pod
+
+See [AddNewPod.md](AddNewPod.md).
+
+### Code Formatting
+
+To ensure that the code is formatted consistently, run the script
+[./scripts/style.sh](https://github.com/firebase/firebase-ios-sdk/blob/master/scripts/style.sh)
+before creating a PR.
+
+Travis will verify that any code changes are done in a style compliant way. Install
+`clang-format` and `swiftformat`.
+These commands will get the right versions:
+
+```
+brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/773cb75d360b58f32048f5964038d09825a507c8/Formula/clang-format.rb
+brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/3dfea1004e0736754bbf49673cca8aaed8a94089/Formula/swiftformat.rb
+```
+
+Note: if you already have a newer version of these installed you may need to
+`brew switch` to this version.
+
+### Running Unit Tests
+
+Select a scheme and press Command-u to build a component and run its unit tests.
+
+#### Viewing Code Coverage
+
+First, make sure that [xcov](https://github.com/nakiostudio/xcov) is installed with `gem install xcov`.
+
+After running the `AllUnitTests_iOS` scheme in Xcode, execute
+`xcov --workspace Firebase.xcworkspace --scheme AllUnitTests_iOS --output_directory xcov_output`
+at Example/ in the terminal. This will aggregate the coverage, and you can run `open xcov_output/index.html` to see the results.
+
+### Running Sample Apps
+In order to run the sample apps and integration tests, you'll need valid
+`GoogleService-Info.plist` files for those samples. The Firebase Xcode project contains dummy plist
+files without real values, but can be replaced with real plist files. To get your own
+`GoogleService-Info.plist` files:
+
+1. Go to the [Firebase Console](https://console.firebase.google.com/)
+2. Create a new Firebase project, if you don't already have one
+3. For each sample app you want to test, create a new Firebase app with the sample app's bundle
+identifier (e.g. `com.google.Database-Example`)
+4. Download the resulting `GoogleService-Info.plist` and replace the appropriate dummy plist file
+(e.g. in [Example/Database/App/](Example/Database/App/));
+
+Some sample apps like Firebase Messaging ([Example/Messaging/App](Example/Messaging/App)) require
+special Apple capabilities, and you will have to change the sample app to use a unique bundle
+identifier that you can control in your own Apple Developer account.
+
+## Specific Component Instructions
+See the sections below for any special instructions for those components.
+
+### Firebase Auth
+
+If you're doing specific Firebase Auth development, see
+[the Auth Sample README](Example/Auth/README.md) for instructions about
+building and running the FirebaseAuth pod along with various samples and tests.
+
+### Firebase Database
+
+To run the Database Integration tests, make your database authentication rules
+[public](https://firebase.google.com/docs/database/security/quickstart).
+
+### Firebase Storage
+
+To run the Storage Integration tests, follow the instructions in
+[FIRStorageIntegrationTests.m](Example/Storage/Tests/Integration/FIRStorageIntegrationTests.m).
+
+#### Push Notifications
+
+Push notifications can only be delivered to specially provisioned App IDs in the developer portal.
+In order to actually test receiving push notifications, you will need to:
+
+1. Change the bundle identifier of the sample app to something you own in your Apple Developer
+account, and enable that App ID for push notifications.
+2. You'll also need to
+[upload your APNs Provider Authentication Key or certificate to the Firebase Console](https://firebase.google.com/docs/cloud-messaging/ios/certs)
+at **Project Settings > Cloud Messaging > [Your Firebase App]**.
+3. Ensure your iOS device is added to your Apple Developer portal as a test device.
+
+#### iOS Simulator
+
+The iOS Simulator cannot register for remote notifications, and will not receive push notifications.
+In order to receive push notifications, you'll have to follow the steps above and run the app on a
+physical device.
+
+## Community Supported Efforts
+
+We've seen an amazing amount of interest and contributions to improve the Firebase SDKs, and we are
+very grateful!  We'd like to empower as many developers as we can to be able to use Firebase and
+participate in the Firebase community.
+
+### macOS and tvOS
+Thanks to contributions from the community, FirebaseAuth, FirebaseCore, FirebaseDatabase, FirebaseMessaging,
+FirebaseFirestore, FirebaseFunctions and FirebaseStorage now compile, run unit tests, and work on
+macOS and tvOS.
+
+For tvOS, checkout the [Sample](Example/tvOSSample).
+
+Keep in mind that macOS and tvOS are not officially supported by Firebase, and this repository is
+actively developed primarily for iOS. While we can catch basic unit test issues with Travis, there
+may be some changes where the SDK no longer works as expected on macOS or tvOS. If you encounter
+this, please [file an issue](https://github.com/firebase/firebase-ios-sdk/issues).
+
+Note that the Firebase pod is not available for macOS and tvOS.
+
+To install, add a subset of the following to the Podfile:
+
+```
+pod 'FirebaseAuth'
+pod 'FirebaseCore'
+pod 'FirebaseDatabase'
+pod 'FirebaseFirestore'
+pod 'FirebaseFunctions'
+pod 'FirebaseMessaging'
+pod 'FirebaseStorage'
+```
+
+## Roadmap
+
+See [Roadmap](ROADMAP.md) for more about the Firebase iOS SDK Open Source
+plans and directions.
+
+## Contributing
+
+See [Contributing](CONTRIBUTING.md) for more information on contributing to the Firebase
+iOS SDK.
+
+## License
+
+The contents of this repository is licensed under the
+[Apache License, version 2.0](http://www.apache.org/licenses/LICENSE-2.0).
+
+Your use of Firebase is governed by the
+[Terms of Service for Firebase Services](https://firebase.google.com/terms/).

Pods/FirebaseCoreDiagnostics/Firebase/CoreDiagnostics/FIRCDLibrary/FIRCoreDiagnostics.m

@@ -0,0 +1,674 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <objc/runtime.h>
+#include <sys/utsname.h>
+
+#import <GoogleDataTransport/GDTConsoleLogger.h>
+#import <GoogleDataTransport/GDTEvent.h>
+#import <GoogleDataTransport/GDTTargets.h>
+#import <GoogleDataTransport/GDTTransport.h>
+
+#import <GoogleUtilities/GULAppEnvironmentUtil.h>
+#import <GoogleUtilities/GULLogger.h>
+
+#import <FirebaseCoreDiagnosticsInterop/FIRCoreDiagnosticsData.h>
+#import <FirebaseCoreDiagnosticsInterop/FIRCoreDiagnosticsInterop.h>
+
+#import <nanopb/pb.h>
+#import <nanopb/pb_decode.h>
+#import <nanopb/pb_encode.h>
+
+#import "FIRCDLibrary/Protogen/nanopb/firebasecore.nanopb.h"
+
+#import "FIRCDLibrary/FIRCoreDiagnosticsDateFileStorage.h"
+
+/** The logger service string to use when printing to the console. */
+static GULLoggerService kFIRCoreDiagnostics = @"[FirebaseCoreDiagnostics/FIRCoreDiagnostics]";
+
+#ifdef FIREBASE_BUILD_ZIP_FILE
+static BOOL kUsingZipFile = YES;
+#else   // FIREBASE_BUILD_ZIP_FILE
+static BOOL kUsingZipFile = NO;
+#endif  // FIREBASE_BUILD_ZIP_FILE
+
+#ifdef FIREBASE_BUILD_CARTHAGE
+#define kDeploymentType logs_proto_mobilesdk_ios_ICoreConfiguration_DeploymentType_CARTHAGE
+#elif FIREBASE_BUILD_ZIP_FILE
+#define kDeploymentType logs_proto_mobilesdk_ios_ICoreConfiguration_DeploymentType_ZIP_FILE
+#else
+#define kDeploymentType logs_proto_mobilesdk_ios_ICoreConfiguration_DeploymentType_COCOAPODS
+#endif
+
+static NSString *const kFIRServiceMLVisionOnDeviceAutoML = @"MLVisionOnDeviceAutoML";
+static NSString *const kFIRServiceMLVisionOnDeviceFace = @"MLVisionOnDeviceFace";
+static NSString *const kFIRServiceMLVisionOnDeviceBarcode = @"MLVisionOnDeviceBarcode";
+static NSString *const kFIRServiceMLVisionOnDeviceText = @"MLVisionOnDeviceText";
+static NSString *const kFIRServiceMLVisionOnDeviceLabel = @"MLVisionOnDeviceLabel";
+static NSString *const kFIRServiceMLVisionOnDeviceObjectDetection =
+    @"MLVisionOnDeviceObjectDetection";
+static NSString *const kFIRServiceMLModelInterpreter = @"MLModelInterpreter";
+
+static NSString *const kFIRServiceAdMob = @"AdMob";
+static NSString *const kFIRServiceAuth = @"Auth";
+static NSString *const kFIRServiceAuthUI = @"AuthUI";
+static NSString *const kFIRServiceCrash = @"Crash";
+static NSString *const kFIRServiceDatabase = @"Database";
+static NSString *const kFIRServiceDynamicLinks = @"DynamicLinks";
+static NSString *const kFIRServiceFirestore = @"Firestore";
+static NSString *const kFIRServiceFunctions = @"Functions";
+static NSString *const kFIRServiceIAM = @"InAppMessaging";
+static NSString *const kFIRServiceInstanceID = @"InstanceID";
+static NSString *const kFIRServiceInvites = @"Invites";
+static NSString *const kFIRServiceMessaging = @"Messaging";
+static NSString *const kFIRServiceMeasurement = @"Measurement";
+static NSString *const kFIRServicePerformance = @"Performance";
+static NSString *const kFIRServiceRemoteConfig = @"RemoteConfig";
+static NSString *const kFIRServiceStorage = @"Storage";
+static NSString *const kGGLServiceAnalytics = @"Analytics";
+static NSString *const kGGLServiceSignIn = @"SignIn";
+static NSString *const kFIRAppDiagnosticsConfigurationTypeKey =
+    @"FIRAppDiagnosticsConfigurationTypeKey";
+static NSString *const kFIRAppDiagnosticsFIRAppKey = @"FIRAppDiagnosticsFIRAppKey";
+static NSString *const kFIRAppDiagnosticsSDKNameKey = @"FIRAppDiagnosticsSDKNameKey";
+static NSString *const kFIRAppDiagnosticsSDKVersionKey = @"FIRAppDiagnosticsSDKVersionKey";
+
+/**
+ * The file name to the recent heartbeat date.
+ */
+NSString *const kFIRCoreDiagnosticsHeartbeatDateFileName = @"FIREBASE_DIAGNOSTICS_HEARTBEAT_DATE";
+
+/**
+ * @note This should implement the GDTEventDataObject protocol, but can't because of weak-linking.
+ */
+@interface FIRCoreDiagnosticsLog : NSObject
+
+/** The config that will be converted to proto bytes. */
+@property(nonatomic) logs_proto_mobilesdk_ios_ICoreConfiguration config;
+
+@end
+
+@implementation FIRCoreDiagnosticsLog
+
+- (instancetype)initWithConfig:(logs_proto_mobilesdk_ios_ICoreConfiguration)config {
+  self = [super init];
+  if (self) {
+    _config = config;
+  }
+  return self;
+}
+
+// Provided and required by the GDTEventDataObject protocol.
+- (NSData *)transportBytes {
+  pb_ostream_t sizestream = PB_OSTREAM_SIZING;
+
+  // Encode 1 time to determine the size.
+  if (!pb_encode(&sizestream, logs_proto_mobilesdk_ios_ICoreConfiguration_fields, &_config)) {
+    GDTLogError(GDTMCETransportBytesError, @"Error in nanopb encoding for size: %s",
+                PB_GET_ERROR(&sizestream));
+  }
+
+  // Encode a 2nd time to actually get the bytes from it.
+  size_t bufferSize = sizestream.bytes_written;
+  CFMutableDataRef dataRef = CFDataCreateMutable(CFAllocatorGetDefault(), bufferSize);
+  pb_ostream_t ostream = pb_ostream_from_buffer((void *)CFDataGetBytePtr(dataRef), bufferSize);
+  if (!pb_encode(&ostream, logs_proto_mobilesdk_ios_ICoreConfiguration_fields, &_config)) {
+    GDTLogError(GDTMCETransportBytesError, @"Error in nanopb encoding for bytes: %s",
+                PB_GET_ERROR(&ostream));
+  }
+  CFDataSetLength(dataRef, ostream.bytes_written);
+
+  return CFBridgingRelease(dataRef);
+}
+
+- (void)dealloc {
+  pb_release(logs_proto_mobilesdk_ios_ICoreConfiguration_fields, &_config);
+}
+
+@end
+
+NS_ASSUME_NONNULL_BEGIN
+
+/** This class produces a protobuf containing diagnostics and usage data to be logged. */
+@interface FIRCoreDiagnostics : NSObject <FIRCoreDiagnosticsInterop>
+
+/** The queue on which all diagnostics collection will occur. */
+@property(nonatomic, readonly) dispatch_queue_t diagnosticsQueue;
+
+/** The transport object used to send data. */
+@property(nonatomic, readonly) GDTTransport *transport;
+
+/** The storage to store the date of the last sent heartbeat. */
+@property(nonatomic, readonly) FIRCoreDiagnosticsDateFileStorage *heartbeatDateStorage;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+@implementation FIRCoreDiagnostics
+
++ (instancetype)sharedInstance {
+  static FIRCoreDiagnostics *sharedInstance;
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    sharedInstance = [[FIRCoreDiagnostics alloc] init];
+  });
+  return sharedInstance;
+}
+
+- (instancetype)init {
+  GDTTransport *transport = [[GDTTransport alloc] initWithMappingID:@"137"
+                                                       transformers:nil
+                                                             target:kGDTTargetCCT];
+
+  FIRCoreDiagnosticsDateFileStorage *dateStorage = [[FIRCoreDiagnosticsDateFileStorage alloc]
+      initWithFileURL:[[self class] filePathURLWithName:kFIRCoreDiagnosticsHeartbeatDateFileName]];
+
+  return [self initWithTransport:transport heartbeatDateStorage:dateStorage];
+}
+
+/** Initializer for unit tests.
+ *
+ * @param transport A `GDTTransport` instance which that be used to send event.
+ * @param heartbeatDateStorage An instanse of date storage to track heartbeat sending.
+ * @return Returns the initialized `FIRCoreDiagnostics` instance.
+ */
+- (instancetype)initWithTransport:(GDTTransport *)transport
+             heartbeatDateStorage:(FIRCoreDiagnosticsDateFileStorage *)heartbeatDateStorage {
+  self = [super init];
+  if (self) {
+    _diagnosticsQueue =
+        dispatch_queue_create("com.google.FIRCoreDiagnostics", DISPATCH_QUEUE_SERIAL);
+    _transport = transport;
+    _heartbeatDateStorage = heartbeatDateStorage;
+  }
+  return self;
+}
+
+#pragma mark - File path helpers
+
+/** Returns the URL path of the file with name fileName under the Application Support folder for
+ * local logging. Creates the Application Support folder if the folder doesn't exist.
+ *
+ * @return the URL path of the file with the name fileName in Application Support.
+ */
++ (NSURL *)filePathURLWithName:(NSString *)fileName {
+  @synchronized(self) {
+    NSArray<NSString *> *paths =
+        NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES);
+    NSArray<NSString *> *components = @[ paths.lastObject, @"Google/FIRApp" ];
+    NSString *directoryString = [NSString pathWithComponents:components];
+    NSURL *directoryURL = [NSURL fileURLWithPath:directoryString];
+
+    NSError *error;
+    if (![directoryURL checkResourceIsReachableAndReturnError:&error]) {
+      // If fail creating the Application Support directory, return nil.
+      if (![[NSFileManager defaultManager] createDirectoryAtURL:directoryURL
+                                    withIntermediateDirectories:YES
+                                                     attributes:nil
+                                                          error:&error]) {
+        GULLogWarning(kFIRCoreDiagnostics, YES, @"I-COR100001",
+                      @"Unable to create internal state storage: %@", error);
+        return nil;
+      }
+    }
+    return [directoryURL URLByAppendingPathComponent:fileName];
+  }
+}
+
+#pragma mark - Metadata helpers
+
+/** Returns the model of iOS device. Sample platform strings are @"iPhone7,1" for iPhone 6 Plus,
+ * @"iPhone7,2" for iPhone 6, etc. Refer to the Hardware strings at
+ * https://en.wikipedia.org/wiki/List_of_iOS_devices
+ *
+ * @return The device model as an NSString.
+ */
++ (NSString *)deviceModel {
+  static NSString *deviceModel = nil;
+  if (deviceModel == nil) {
+    struct utsname systemInfo;
+    uname(&systemInfo);
+    deviceModel = [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];
+  }
+  return deviceModel;
+}
+
+#pragma mark - nanopb helper functions
+
+/** Mallocs a pb_bytes_array and copies the given NSString's bytes into the bytes array.
+ *
+ * @note Memory needs to be free manually, through pb_free or pb_release.
+ * @param string The string to encode as pb_bytes.
+ */
+pb_bytes_array_t *FIREncodeString(NSString *string) {
+  NSData *stringBytes = [string dataUsingEncoding:NSUTF8StringEncoding];
+  return FIREncodeData(stringBytes);
+}
+
+/** Mallocs a pb_bytes_array and copies the given NSData bytes into the bytes array.
+ *
+ * @note Memory needs to be free manually, through pb_free or pb_release.
+ * @param data The data to copy into the new bytes array.
+ */
+pb_bytes_array_t *FIREncodeData(NSData *data) {
+  pb_bytes_array_t *pbBytes = malloc(PB_BYTES_ARRAY_T_ALLOCSIZE(data.length));
+  memcpy(pbBytes->bytes, [data bytes], data.length);
+  pbBytes->size = (pb_size_t)data.length;
+  return pbBytes;
+}
+
+/** Maps a service string to the representative nanopb enum.
+ *
+ * @param serviceString The SDK service string to convert.
+ * @return The representative nanopb enum.
+ */
+logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType FIRMapFromServiceStringToTypeEnum(
+    NSString *serviceString) {
+  static NSDictionary<NSString *, NSNumber *> *serviceStringToTypeEnum;
+  if (serviceStringToTypeEnum == nil) {
+    serviceStringToTypeEnum = @{
+      kFIRServiceAdMob : @(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ADMOB),
+      kFIRServiceMessaging : @(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_MESSAGING),
+      kFIRServiceMeasurement :
+          @(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_MEASUREMENT),
+      kFIRServiceRemoteConfig :
+          @(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_REMOTE_CONFIG),
+      kFIRServiceDatabase : @(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_DATABASE),
+      kFIRServiceDynamicLinks :
+          @(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_DYNAMIC_LINKS),
+      kFIRServiceAuth : @(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_AUTH),
+      kFIRServiceAuthUI : @(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_AUTH_UI),
+      kFIRServiceFirestore : @(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_FIRESTORE),
+      kFIRServiceFunctions : @(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_FUNCTIONS),
+      kFIRServicePerformance :
+          @(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_PERFORMANCE),
+      kFIRServiceStorage : @(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_STORAGE),
+      kFIRServiceMLVisionOnDeviceAutoML :
+          @(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ML_VISION_ON_DEVICE_AUTOML),
+      kFIRServiceMLVisionOnDeviceFace :
+          @(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ML_VISION_ON_DEVICE_FACE),
+      kFIRServiceMLVisionOnDeviceBarcode :
+          @(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ML_VISION_ON_DEVICE_BARCODE),
+      kFIRServiceMLVisionOnDeviceText :
+          @(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ML_VISION_ON_DEVICE_TEXT),
+      kFIRServiceMLVisionOnDeviceLabel :
+          @(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ML_VISION_ON_DEVICE_LABEL),
+      kFIRServiceMLVisionOnDeviceObjectDetection : @(
+          logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ML_VISION_ON_DEVICE_OBJECT_DETECTION),
+      kFIRServiceMLModelInterpreter :
+          @(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ML_MODEL_INTERPRETER),
+      kGGLServiceAnalytics : @(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ANALYTICS),
+      kGGLServiceSignIn : @(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_SIGN_IN),
+      kFIRServiceIAM : @(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_IN_APP_MESSAGING),
+    };
+  }
+  if (serviceStringToTypeEnum[serviceString] != nil) {
+    return (int32_t)serviceStringToTypeEnum[serviceString].longLongValue;
+  }
+  return logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_UNKNOWN_SDK_SERVICE;
+}
+
+#pragma mark - Proto population functions
+
+/** Populates the given proto with data related to an SDK logDiagnostics call from the
+ * diagnosticObjects dictionary.
+ *
+ * @param config The proto to populate
+ * @param diagnosticObjects The dictionary of diagnostics objects.
+ */
+void FIRPopulateProtoWithInfoFromUserInfoParams(logs_proto_mobilesdk_ios_ICoreConfiguration *config,
+                                                NSDictionary<NSString *, id> *diagnosticObjects) {
+  NSNumber *configurationType = diagnosticObjects[kFIRCDConfigurationTypeKey];
+  if (configurationType != nil) {
+    switch (configurationType.integerValue) {
+      case logs_proto_mobilesdk_ios_ICoreConfiguration_ConfigurationType_CORE:
+        config->configuration_type =
+            logs_proto_mobilesdk_ios_ICoreConfiguration_ConfigurationType_CORE;
+        config->has_configuration_type = 1;
+        break;
+      case logs_proto_mobilesdk_ios_ICoreConfiguration_ConfigurationType_SDK:
+        config->configuration_type =
+            logs_proto_mobilesdk_ios_ICoreConfiguration_ConfigurationType_SDK;
+        config->has_configuration_type = 1;
+        break;
+      default:
+        break;
+    }
+  }
+
+  NSString *sdkName = diagnosticObjects[kFIRCDSdkNameKey];
+  if (sdkName) {
+    config->sdk_name = FIRMapFromServiceStringToTypeEnum(sdkName);
+    config->has_sdk_name = 1;
+  }
+
+  NSString *version = diagnosticObjects[kFIRCDSdkVersionKey];
+  if (version) {
+    config->sdk_version = FIREncodeString(version);
+  }
+}
+
+/** Populates the given proto with data from the calling FIRApp using the given
+ * diagnosticObjects dictionary.
+ *
+ * @param config The proto to populate
+ * @param diagnosticObjects The dictionary of diagnostics objects.
+ */
+void FIRPopulateProtoWithCommonInfoFromApp(logs_proto_mobilesdk_ios_ICoreConfiguration *config,
+                                           NSDictionary<NSString *, id> *diagnosticObjects) {
+  config->pod_name = logs_proto_mobilesdk_ios_ICoreConfiguration_PodName_FIREBASE;
+  config->has_pod_name = 1;
+
+  if (!diagnosticObjects[kFIRCDllAppsCountKey]) {
+    GDTLogError(GDTMCEGeneralError, @"%@", @"App count is a required value in the data dict.");
+  }
+  config->app_count = (int32_t)[diagnosticObjects[kFIRCDllAppsCountKey] integerValue];
+  config->has_app_count = 1;
+
+  NSString *googleAppID = diagnosticObjects[kFIRCDGoogleAppIDKey];
+  if (googleAppID.length) {
+    config->app_id = FIREncodeString(googleAppID);
+  }
+
+  NSString *bundleID = diagnosticObjects[kFIRCDBundleIDKey];
+  if (bundleID.length) {
+    config->bundle_id = FIREncodeString(bundleID);
+  }
+
+  NSString *firebaseUserAgent = diagnosticObjects[kFIRCDFirebaseUserAgentKey];
+  if (firebaseUserAgent.length) {
+    config->platform_info = FIREncodeString(firebaseUserAgent);
+  }
+
+  NSNumber *usingOptionsFromDefaultPlist = diagnosticObjects[kFIRCDUsingOptionsFromDefaultPlistKey];
+  if (usingOptionsFromDefaultPlist != nil) {
+    config->use_default_app = [usingOptionsFromDefaultPlist boolValue];
+    config->has_use_default_app = 1;
+  }
+
+  NSString *libraryVersionID = diagnosticObjects[kFIRCDLibraryVersionIDKey];
+  if (libraryVersionID) {
+    config->icore_version = FIREncodeString(libraryVersionID);
+  }
+
+  NSString *deviceModel = [FIRCoreDiagnostics deviceModel];
+  if (deviceModel.length) {
+    config->device_model = FIREncodeString(deviceModel);
+  }
+
+  NSString *osVersion = [GULAppEnvironmentUtil systemVersion];
+  if (osVersion.length) {
+    config->os_version = FIREncodeString(osVersion);
+  }
+
+  config->using_zip_file = kUsingZipFile;
+  config->has_using_zip_file = 1;
+  config->deployment_type = kDeploymentType;
+  config->has_deployment_type = 1;
+  config->deployed_in_app_store = [GULAppEnvironmentUtil isFromAppStore];
+  config->has_deployed_in_app_store = 1;
+}
+
+/** Populates the given proto with installed services data.
+ *
+ * @param config The proto to populate
+ */
+void FIRPopulateProtoWithInstalledServices(logs_proto_mobilesdk_ios_ICoreConfiguration *config) {
+  NSMutableArray<NSNumber *> *sdkServiceInstalledArray = [NSMutableArray array];
+
+  // AdMob
+  if (NSClassFromString(@"GADBannerView") != nil) {
+    [sdkServiceInstalledArray addObject:@(FIRMapFromServiceStringToTypeEnum(kFIRServiceAdMob))];
+  }
+  // CloudMessaging
+  if (NSClassFromString(@"FIRMessaging") != nil) {
+    [sdkServiceInstalledArray addObject:@(FIRMapFromServiceStringToTypeEnum(kFIRServiceMessaging))];
+  }
+  // RemoteConfig
+  if (NSClassFromString(@"FIRRemoteConfig") != nil) {
+    [sdkServiceInstalledArray
+        addObject:@(FIRMapFromServiceStringToTypeEnum(kFIRServiceRemoteConfig))];
+  }
+  // Measurement/Analtyics
+  if (NSClassFromString(@"FIRAnalytics") != nil) {
+    [sdkServiceInstalledArray
+        addObject:@(FIRMapFromServiceStringToTypeEnum(kFIRServiceMeasurement))];
+  }
+  // ML Vision On Device AutoML.
+  if (NSClassFromString(@"FIRVisionOnDeviceAutoMLImageLabelerOptions") != nil) {
+    [sdkServiceInstalledArray
+        addObject:@(FIRMapFromServiceStringToTypeEnum(kFIRServiceMLVisionOnDeviceAutoML))];
+  }
+  // ML Vision On Device Face.
+  if (NSClassFromString(@"FIRVisionFaceDetector") != nil &&
+      NSClassFromString(@"GMVFaceDetector") != nil) {
+    [sdkServiceInstalledArray
+        addObject:@(FIRMapFromServiceStringToTypeEnum(kFIRServiceMLVisionOnDeviceFace))];
+  }
+  // ML Vision On Device Barcode.
+  if (NSClassFromString(@"FIRVisionBarcodeDetector") != nil &&
+      NSClassFromString(@"GMVBarcodeDetector") != nil) {
+    [sdkServiceInstalledArray
+        addObject:@(FIRMapFromServiceStringToTypeEnum(kFIRServiceMLVisionOnDeviceBarcode))];
+  }
+  // ML Vision On Device Text.
+  if (NSClassFromString(@"FIRVisionTextDetector") != nil &&
+      NSClassFromString(@"GMVTextDetector") != nil) {
+    [sdkServiceInstalledArray
+        addObject:@(FIRMapFromServiceStringToTypeEnum(kFIRServiceMLVisionOnDeviceText))];
+  }
+  // ML Vision On Device Image Label.
+  if (NSClassFromString(@"FIRVisionLabelDetector") != nil &&
+      NSClassFromString(@"GMVLabelDetector") != nil) {
+    [sdkServiceInstalledArray
+        addObject:@(FIRMapFromServiceStringToTypeEnum(kFIRServiceMLVisionOnDeviceLabel))];
+  }
+  // ML Vision On Device Object.
+  if (NSClassFromString(@"FIRVisionObjectDetector") != nil) {
+    [sdkServiceInstalledArray
+        addObject:@(FIRMapFromServiceStringToTypeEnum(kFIRServiceMLVisionOnDeviceObjectDetection))];
+  }
+  // ML Model Interpreter
+  if (NSClassFromString(@"FIRCustomModelInterpreter") != nil) {
+    [sdkServiceInstalledArray
+        addObject:@(FIRMapFromServiceStringToTypeEnum(kFIRServiceMLModelInterpreter))];
+  }
+  // Database
+  if (NSClassFromString(@"FIRDatabase") != nil) {
+    [sdkServiceInstalledArray addObject:@(FIRMapFromServiceStringToTypeEnum(kFIRServiceDatabase))];
+  }
+  // DynamicDeepLink
+  if (NSClassFromString(@"FIRDynamicLinks") != nil) {
+    [sdkServiceInstalledArray
+        addObject:@(FIRMapFromServiceStringToTypeEnum(kFIRServiceDynamicLinks))];
+  }
+  // Auth
+  if (NSClassFromString(@"FIRAuth") != nil) {
+    [sdkServiceInstalledArray addObject:@(FIRMapFromServiceStringToTypeEnum(kFIRServiceAuth))];
+  }
+  // AuthUI
+  if (NSClassFromString(@"FUIAuth") != nil) {
+    [sdkServiceInstalledArray addObject:@(FIRMapFromServiceStringToTypeEnum(kFIRServiceAuthUI))];
+  }
+  // Firestore
+  if (NSClassFromString(@"FIRFirestore") != nil) {
+    [sdkServiceInstalledArray addObject:@(FIRMapFromServiceStringToTypeEnum(kFIRServiceFirestore))];
+  }
+  // Functions
+  if (NSClassFromString(@"FIRFunctions") != nil) {
+    [sdkServiceInstalledArray addObject:@(FIRMapFromServiceStringToTypeEnum(kFIRServiceFunctions))];
+  }
+  // Performance
+  if (NSClassFromString(@"FIRPerformance") != nil) {
+    [sdkServiceInstalledArray
+        addObject:@(FIRMapFromServiceStringToTypeEnum(kFIRServicePerformance))];
+  }
+  // Storage
+  if (NSClassFromString(@"FIRStorage") != nil) {
+    [sdkServiceInstalledArray addObject:@(FIRMapFromServiceStringToTypeEnum(kFIRServiceStorage))];
+  }
+  // SignIn via Google pod
+  if (NSClassFromString(@"GIDSignIn") != nil && NSClassFromString(@"GGLContext") != nil) {
+    [sdkServiceInstalledArray addObject:@(FIRMapFromServiceStringToTypeEnum(kGGLServiceSignIn))];
+  }
+  // Analytics via Google pod
+  if (NSClassFromString(@"GAI") != nil && NSClassFromString(@"GGLContext") != nil) {
+    [sdkServiceInstalledArray addObject:@(FIRMapFromServiceStringToTypeEnum(kGGLServiceAnalytics))];
+  }
+
+  // In-App Messaging
+  if (NSClassFromString(@"FIRInAppMessaging") != nil) {
+    [sdkServiceInstalledArray addObject:@(FIRMapFromServiceStringToTypeEnum(kFIRServiceIAM))];
+  }
+
+  logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType *servicesInstalled =
+      malloc(sizeof(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType) *
+             sdkServiceInstalledArray.count);
+  for (NSUInteger i = 0; i < sdkServiceInstalledArray.count; i++) {
+    NSNumber *typeEnum = sdkServiceInstalledArray[i];
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType serviceType =
+        (int32_t)typeEnum.integerValue;
+    servicesInstalled[i] = serviceType;
+  }
+
+  config->sdk_service_installed = servicesInstalled;
+  config->sdk_service_installed_count = (int32_t)sdkServiceInstalledArray.count;
+}
+
+/** Populates the proto with the number of linked frameworks.
+ *
+ * @param config The proto to populate.
+ */
+void FIRPopulateProtoWithNumberOfLinkedFrameworks(
+    logs_proto_mobilesdk_ios_ICoreConfiguration *config) {
+  int numFrameworks = -1;  // Subtract the app binary itself.
+  unsigned int numImages;
+  const char **imageNames = objc_copyImageNames(&numImages);
+  for (unsigned int i = 0; i < numImages; i++) {
+    NSString *imageName = [NSString stringWithUTF8String:imageNames[i]];
+    if ([imageName rangeOfString:@"System/Library"].length != 0        // Apple .frameworks
+        || [imageName rangeOfString:@"Developer/Library"].length != 0  // Xcode debug .frameworks
+        || [imageName rangeOfString:@"usr/lib"].length != 0) {         // Public .dylibs
+      continue;
+    }
+    numFrameworks++;
+  }
+  free(imageNames);
+  config->dynamic_framework_count = numFrameworks;
+  config->has_dynamic_framework_count = 1;
+}
+
+/** Populates the proto with Info.plist values.
+ *
+ * @param config The proto to populate.
+ */
+void FIRPopulateProtoWithInfoPlistValues(logs_proto_mobilesdk_ios_ICoreConfiguration *config) {
+  NSDictionary<NSString *, id> *info = [[NSBundle mainBundle] infoDictionary];
+
+  NSString *xcodeVersion = info[@"DTXcodeBuild"] ?: @"";
+  NSString *sdkVersion = info[@"DTSDKBuild"] ?: @"";
+  NSString *combinedVersions = [NSString stringWithFormat:@"%@-%@", xcodeVersion, sdkVersion];
+  config->apple_framework_version = FIREncodeString(combinedVersions);
+
+  NSString *minVersion = info[@"MinimumOSVersion"];
+  if (minVersion) {
+    config->min_supported_ios_version = FIREncodeString(minVersion);
+  }
+
+  // Apps can turn off swizzling in the Info.plist, check if they've explicitly set the value and
+  // report it. It's enabled by default.
+  NSNumber *appDelegateSwizzledNum = info[@"FirebaseAppDelegateProxyEnabled"];
+  BOOL appDelegateSwizzled = YES;
+  if ([appDelegateSwizzledNum isKindOfClass:[NSNumber class]]) {
+    appDelegateSwizzled = [appDelegateSwizzledNum boolValue];
+  }
+  config->swizzling_enabled = appDelegateSwizzled;
+  config->has_swizzling_enabled = 1;
+}
+
+#pragma mark - FIRCoreDiagnosticsInterop
+
++ (void)sendDiagnosticsData:(nonnull id<FIRCoreDiagnosticsData>)diagnosticsData {
+  FIRCoreDiagnostics *diagnostics = [FIRCoreDiagnostics sharedInstance];
+  [diagnostics sendDiagnosticsData:diagnosticsData];
+}
+
+- (void)sendDiagnosticsData:(nonnull id<FIRCoreDiagnosticsData>)diagnosticsData {
+  dispatch_async(self.diagnosticsQueue, ^{
+    NSDictionary<NSString *, id> *diagnosticObjects = diagnosticsData.diagnosticObjects;
+    NSNumber *isDataCollectionDefaultEnabled =
+        diagnosticObjects[kFIRCDIsDataCollectionDefaultEnabledKey];
+    if (isDataCollectionDefaultEnabled && ![isDataCollectionDefaultEnabled boolValue]) {
+      return;
+    }
+
+    // Create the proto.
+    logs_proto_mobilesdk_ios_ICoreConfiguration icore_config =
+        logs_proto_mobilesdk_ios_ICoreConfiguration_init_default;
+
+    icore_config.using_gdt = 1;
+    icore_config.has_using_gdt = 1;
+
+    // Populate the proto with information.
+    FIRPopulateProtoWithInfoFromUserInfoParams(&icore_config, diagnosticObjects);
+    FIRPopulateProtoWithCommonInfoFromApp(&icore_config, diagnosticObjects);
+    FIRPopulateProtoWithInstalledServices(&icore_config);
+    FIRPopulateProtoWithNumberOfLinkedFrameworks(&icore_config);
+    FIRPopulateProtoWithInfoPlistValues(&icore_config);
+    [self setHeartbeatFlagIfNeededToConfig:&icore_config];
+
+    // This log object is capable of converting the proto to bytes.
+    FIRCoreDiagnosticsLog *log = [[FIRCoreDiagnosticsLog alloc] initWithConfig:icore_config];
+
+    // Send the log as a telemetry event.
+    GDTEvent *event = [self.transport eventForTransport];
+    event.dataObject = (id<GDTEventDataObject>)log;
+    [self.transport sendTelemetryEvent:event];
+  });
+}
+
+#pragma mark - Heartbeat
+
+- (void)setHeartbeatFlagIfNeededToConfig:(logs_proto_mobilesdk_ios_ICoreConfiguration *)config {
+  // Check if need to send a heartbeat.
+  NSDate *currentDate = [NSDate date];
+  NSDate *lastCheckin = [self.heartbeatDateStorage date];
+  if (lastCheckin) {
+    // Ensure the previous checkin was on a different date in the past.
+    if ([self isDate:currentDate inSameDayOrBeforeThan:lastCheckin]) {
+      return;
+    }
+  }
+
+  // Update heartbeat sent date.
+  NSError *error;
+  if (![self.heartbeatDateStorage setDate:currentDate error:&error]) {
+    GULLogError(kFIRCoreDiagnostics, NO, @"I-COR100004", @"Unable to persist internal state: %@",
+                error);
+  }
+
+  // Set the flag.
+  config->sdk_name = logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ICORE;
+  config->has_sdk_name = 1;
+}
+
+- (BOOL)isDate:(NSDate *)date1 inSameDayOrBeforeThan:(NSDate *)date2 {
+  return [[NSCalendar currentCalendar] isDate:date1 inSameDayAsDate:date2] ||
+         [date1 compare:date2] == NSOrderedAscending;
+}
+
+@end

Pods/FirebaseCoreDiagnostics/Firebase/CoreDiagnostics/FIRCDLibrary/FIRCoreDiagnosticsDateFileStorage.h

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/// Stores a date to a specified file.
+@interface FIRCoreDiagnosticsDateFileStorage : NSObject
+
+- (instancetype)init NS_UNAVAILABLE;
+
+/**
+ * Default initializer.
+ * @param fileURL The URL of the file to store the date. The directory must exist, the file may not
+ * exist, it will be created if needed.
+ */
+- (instancetype)initWithFileURL:(NSURL *)fileURL;
+
+/**
+ * Saves the date to the specified file.
+ * @return YES on success, NO otherwise.
+ */
+- (BOOL)setDate:(nullable NSDate *)date error:(NSError **)outError;
+
+/**
+ * Reads the date to the specified file.
+ * @return Returns date if exists, otherwise `nil`.
+ */
+- (nullable NSDate *)date;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCoreDiagnostics/Firebase/CoreDiagnostics/FIRCDLibrary/FIRCoreDiagnosticsDateFileStorage.m

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FIRCDLibrary/FIRCoreDiagnosticsDateFileStorage.h"
+
+@interface FIRCoreDiagnosticsDateFileStorage ()
+@property(nonatomic, readonly) NSURL *fileURL;
+@end
+
+@implementation FIRCoreDiagnosticsDateFileStorage
+
+- (instancetype)initWithFileURL:(NSURL *)fileURL {
+  if (fileURL == nil) {
+    return nil;
+  }
+
+  self = [super init];
+  if (self) {
+    _fileURL = fileURL;
+  }
+
+  return self;
+}
+
+- (BOOL)setDate:(nullable NSDate *)date error:(NSError **)outError {
+  NSString *stringToSave = @"";
+
+  if (date != nil) {
+    NSTimeInterval timestamp = [date timeIntervalSinceReferenceDate];
+    stringToSave = [NSString stringWithFormat:@"%f", timestamp];
+  }
+
+  return [stringToSave writeToURL:self.fileURL
+                       atomically:YES
+                         encoding:NSUTF8StringEncoding
+                            error:outError];
+}
+
+- (nullable NSDate *)date {
+  NSString *timestampString = [NSString stringWithContentsOfURL:self.fileURL
+                                                       encoding:NSUTF8StringEncoding
+                                                          error:nil];
+  if (timestampString.length == 0) {
+    return nil;
+  }
+
+  NSTimeInterval timestamp = timestampString.doubleValue;
+  return [NSDate dateWithTimeIntervalSinceReferenceDate:timestamp];
+}
+
+@end

Pods/FirebaseCoreDiagnostics/Firebase/CoreDiagnostics/FIRCDLibrary/Protogen/nanopb/firebasecore.nanopb.c

@@ -0,0 +1,72 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* Automatically generated nanopb constant definitions */
+/* Generated by nanopb-0.3.9.2 */
+
+#include "firebasecore.nanopb.h"
+
+/* @@protoc_insertion_point(includes) */
+#if PB_PROTO_HEADER_VERSION != 30
+#error Regenerate this file with the current version of nanopb generator.
+#endif
+
+
+
+const pb_field_t logs_proto_mobilesdk_ios_ICoreConfiguration_fields[34] = {
+    PB_FIELD(  1, UENUM   , OPTIONAL, STATIC  , FIRST, logs_proto_mobilesdk_ios_ICoreConfiguration, configuration_type, configuration_type, 0),
+    PB_FIELD(  2, BYTES   , OPTIONAL, POINTER , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, version_name, configuration_type, 0),
+    PB_FIELD(  3, INT64   , OPTIONAL, STATIC  , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, build_number, version_name, 0),
+    PB_FIELD(  4, UENUM   , OPTIONAL, STATIC  , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, build_type, build_number, 0),
+    PB_FIELD(  5, BYTES   , OPTIONAL, POINTER , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, plist_version, build_type, 0),
+    PB_FIELD(  6, UENUM   , REPEATED, POINTER , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, sdk_service_enabled, plist_version, 0),
+    PB_FIELD(  7, UENUM   , REPEATED, POINTER , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, sdk_service_installed, sdk_service_enabled, 0),
+    PB_FIELD(  9, BYTES   , OPTIONAL, POINTER , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, device_model, sdk_service_installed, 0),
+    PB_FIELD( 10, BYTES   , OPTIONAL, POINTER , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, app_id, device_model, 0),
+    PB_FIELD( 11, INT64   , OPTIONAL, STATIC  , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, project_number, app_id, 0),
+    PB_FIELD( 12, BYTES   , OPTIONAL, POINTER , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, bundle_id, project_number, 0),
+    PB_FIELD( 13, BYTES   , OPTIONAL, POINTER , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, client_id, bundle_id, 0),
+    PB_FIELD( 14, BYTES   , OPTIONAL, POINTER , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, install, client_id, 0),
+    PB_FIELD( 16, UENUM   , OPTIONAL, STATIC  , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, pod_name, install, 0),
+    PB_FIELD( 18, BYTES   , OPTIONAL, POINTER , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, icore_version, pod_name, 0),
+    PB_FIELD( 19, BYTES   , OPTIONAL, POINTER , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, sdk_version, icore_version, 0),
+    PB_FIELD( 20, UENUM   , OPTIONAL, STATIC  , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, sdk_name, sdk_version, 0),
+    PB_FIELD( 21, INT32   , OPTIONAL, STATIC  , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, app_count, sdk_name, 0),
+    PB_FIELD( 22, BYTES   , OPTIONAL, POINTER , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, os_version, app_count, 0),
+    PB_FIELD( 23, BYTES   , OPTIONAL, POINTER , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, itunes_id, os_version, 0),
+    PB_FIELD( 24, BYTES   , OPTIONAL, POINTER , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, min_supported_ios_version, itunes_id, 0),
+    PB_FIELD( 25, BOOL    , OPTIONAL, STATIC  , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, use_default_app, min_supported_ios_version, 0),
+    PB_FIELD( 26, BOOL    , OPTIONAL, STATIC  , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, deployed_in_app_store, use_default_app, 0),
+    PB_FIELD( 27, INT32   , OPTIONAL, STATIC  , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, dynamic_framework_count, deployed_in_app_store, 0),
+    PB_FIELD( 28, BYTES   , OPTIONAL, POINTER , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, apple_framework_version, dynamic_framework_count, 0),
+    PB_FIELD( 29, BOOL    , OPTIONAL, STATIC  , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, using_zip_file, apple_framework_version, 0),
+    PB_FIELD( 30, UENUM   , OPTIONAL, STATIC  , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, deployment_type, using_zip_file, 0),
+    PB_FIELD( 31, BYTES   , OPTIONAL, POINTER , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, platform_info, deployment_type, 0),
+    PB_FIELD( 32, INT64   , OPTIONAL, STATIC  , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, app_extensions, platform_info, 0),
+    PB_FIELD( 33, BOOL    , OPTIONAL, STATIC  , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, swizzling_enabled, app_extensions, 0),
+    PB_FIELD( 34, INT32   , OPTIONAL, STATIC  , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, log_error_count, swizzling_enabled, 0),
+    PB_FIELD( 35, INT32   , OPTIONAL, STATIC  , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, log_warning_count, log_error_count, 0),
+    PB_FIELD( 36, BOOL    , OPTIONAL, STATIC  , OTHER, logs_proto_mobilesdk_ios_ICoreConfiguration, using_gdt, log_warning_count, 0),
+    PB_LAST_FIELD
+};
+
+
+
+
+
+
+
+/* @@protoc_insertion_point(eof) */

Pods/FirebaseCoreDiagnostics/Firebase/CoreDiagnostics/FIRCDLibrary/Protogen/nanopb/firebasecore.nanopb.h

@@ -0,0 +1,224 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* Automatically generated nanopb header */
+/* Generated by nanopb-0.3.9.2 */
+
+#ifndef PB_LOGS_PROTO_MOBILESDK_IOS_FIREBASECORE_NANOPB_H_INCLUDED
+#define PB_LOGS_PROTO_MOBILESDK_IOS_FIREBASECORE_NANOPB_H_INCLUDED
+#include <nanopb/pb.h>
+
+/* @@protoc_insertion_point(includes) */
+#if PB_PROTO_HEADER_VERSION != 30
+#error Regenerate this file with the current version of nanopb generator.
+#endif
+
+
+/* Enum definitions */
+typedef enum _logs_proto_mobilesdk_ios_ICoreConfiguration_ConfigurationType {
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ConfigurationType_UNKNOWN_CONFIGURATION_TYPE = 0,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ConfigurationType_CORE = 1,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ConfigurationType_SDK = 2
+} logs_proto_mobilesdk_ios_ICoreConfiguration_ConfigurationType;
+#define _logs_proto_mobilesdk_ios_ICoreConfiguration_ConfigurationType_MIN logs_proto_mobilesdk_ios_ICoreConfiguration_ConfigurationType_UNKNOWN_CONFIGURATION_TYPE
+#define _logs_proto_mobilesdk_ios_ICoreConfiguration_ConfigurationType_MAX logs_proto_mobilesdk_ios_ICoreConfiguration_ConfigurationType_SDK
+#define _logs_proto_mobilesdk_ios_ICoreConfiguration_ConfigurationType_ARRAYSIZE ((logs_proto_mobilesdk_ios_ICoreConfiguration_ConfigurationType)(logs_proto_mobilesdk_ios_ICoreConfiguration_ConfigurationType_SDK+1))
+
+typedef enum _logs_proto_mobilesdk_ios_ICoreConfiguration_BuildType {
+    logs_proto_mobilesdk_ios_ICoreConfiguration_BuildType_UNKNOWN_BUILD_TYPE = 0,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_BuildType_INTERNAL = 1,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_BuildType_EAP = 2,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_BuildType_PROD = 3
+} logs_proto_mobilesdk_ios_ICoreConfiguration_BuildType;
+#define _logs_proto_mobilesdk_ios_ICoreConfiguration_BuildType_MIN logs_proto_mobilesdk_ios_ICoreConfiguration_BuildType_UNKNOWN_BUILD_TYPE
+#define _logs_proto_mobilesdk_ios_ICoreConfiguration_BuildType_MAX logs_proto_mobilesdk_ios_ICoreConfiguration_BuildType_PROD
+#define _logs_proto_mobilesdk_ios_ICoreConfiguration_BuildType_ARRAYSIZE ((logs_proto_mobilesdk_ios_ICoreConfiguration_BuildType)(logs_proto_mobilesdk_ios_ICoreConfiguration_BuildType_PROD+1))
+
+typedef enum _logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType {
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_UNKNOWN_SDK_SERVICE = 0,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ICORE = 1,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ADMOB = 2,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_APP_INVITE = 3,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_SIGN_IN = 5,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_GCM = 6,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_MAPS = 7,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_SCION = 8,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ANALYTICS = 9,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_APP_INDEXING = 10,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_CONFIG = 11,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_DURABLE_DEEP_LINKS = 12,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_CRASH = 13,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_AUTH = 14,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_DATABASE = 15,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_STORAGE = 16,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_MESSAGING = 17,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_MEASUREMENT = 18,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_REMOTE_CONFIG = 19,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_DYNAMIC_LINKS = 20,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_INVITES = 21,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_AUTH_UI = 22,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_FIRESTORE = 23,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_PERFORMANCE = 24,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ML_VISION_ON_DEVICE_FACE = 26,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ML_VISION_ON_DEVICE_BARCODE = 27,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ML_VISION_ON_DEVICE_TEXT = 28,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ML_VISION_ON_DEVICE_LABEL = 29,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ML_MODEL_INTERPRETER = 30,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_IN_APP_MESSAGING = 31,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_FUNCTIONS = 32,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ML_NATURAL_LANGUAGE = 33,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ML_VISION_ON_DEVICE_AUTOML = 34,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ML_VISION_ON_DEVICE_OBJECT_DETECTION = 35
+} logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType;
+#define _logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_MIN logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_UNKNOWN_SDK_SERVICE
+#define _logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_MAX logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ML_VISION_ON_DEVICE_OBJECT_DETECTION
+#define _logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ARRAYSIZE ((logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType)(logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_ML_VISION_ON_DEVICE_OBJECT_DETECTION+1))
+
+typedef enum _logs_proto_mobilesdk_ios_ICoreConfiguration_PodName {
+    logs_proto_mobilesdk_ios_ICoreConfiguration_PodName_UNKNOWN_POD_NAME = 0,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_PodName_GOOGLE = 1,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_PodName_FIREBASE = 2
+} logs_proto_mobilesdk_ios_ICoreConfiguration_PodName;
+#define _logs_proto_mobilesdk_ios_ICoreConfiguration_PodName_MIN logs_proto_mobilesdk_ios_ICoreConfiguration_PodName_UNKNOWN_POD_NAME
+#define _logs_proto_mobilesdk_ios_ICoreConfiguration_PodName_MAX logs_proto_mobilesdk_ios_ICoreConfiguration_PodName_FIREBASE
+#define _logs_proto_mobilesdk_ios_ICoreConfiguration_PodName_ARRAYSIZE ((logs_proto_mobilesdk_ios_ICoreConfiguration_PodName)(logs_proto_mobilesdk_ios_ICoreConfiguration_PodName_FIREBASE+1))
+
+typedef enum _logs_proto_mobilesdk_ios_ICoreConfiguration_DeploymentType {
+    logs_proto_mobilesdk_ios_ICoreConfiguration_DeploymentType_UNKNOWN = 0,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_DeploymentType_COCOAPODS = 1,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_DeploymentType_ZIP_FILE = 2,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_DeploymentType_CARTHAGE = 3,
+    logs_proto_mobilesdk_ios_ICoreConfiguration_DeploymentType_SPM = 4
+} logs_proto_mobilesdk_ios_ICoreConfiguration_DeploymentType;
+#define _logs_proto_mobilesdk_ios_ICoreConfiguration_DeploymentType_MIN logs_proto_mobilesdk_ios_ICoreConfiguration_DeploymentType_UNKNOWN
+#define _logs_proto_mobilesdk_ios_ICoreConfiguration_DeploymentType_MAX logs_proto_mobilesdk_ios_ICoreConfiguration_DeploymentType_SPM
+#define _logs_proto_mobilesdk_ios_ICoreConfiguration_DeploymentType_ARRAYSIZE ((logs_proto_mobilesdk_ios_ICoreConfiguration_DeploymentType)(logs_proto_mobilesdk_ios_ICoreConfiguration_DeploymentType_SPM+1))
+
+/* Struct definitions */
+typedef struct _logs_proto_mobilesdk_ios_ICoreConfiguration {
+    bool has_configuration_type;
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ConfigurationType configuration_type;
+    pb_bytes_array_t *version_name;
+    bool has_build_number;
+    int64_t build_number;
+    bool has_build_type;
+    logs_proto_mobilesdk_ios_ICoreConfiguration_BuildType build_type;
+    pb_bytes_array_t *plist_version;
+    pb_size_t sdk_service_enabled_count;
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType *sdk_service_enabled;
+    pb_size_t sdk_service_installed_count;
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType *sdk_service_installed;
+    pb_bytes_array_t *device_model;
+    pb_bytes_array_t *app_id;
+    bool has_project_number;
+    int64_t project_number;
+    pb_bytes_array_t *bundle_id;
+    pb_bytes_array_t *client_id;
+    pb_bytes_array_t *install;
+    bool has_pod_name;
+    logs_proto_mobilesdk_ios_ICoreConfiguration_PodName pod_name;
+    pb_bytes_array_t *icore_version;
+    pb_bytes_array_t *sdk_version;
+    bool has_sdk_name;
+    logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType sdk_name;
+    bool has_app_count;
+    int32_t app_count;
+    pb_bytes_array_t *os_version;
+    pb_bytes_array_t *itunes_id;
+    pb_bytes_array_t *min_supported_ios_version;
+    bool has_use_default_app;
+    bool use_default_app;
+    bool has_deployed_in_app_store;
+    bool deployed_in_app_store;
+    bool has_dynamic_framework_count;
+    int32_t dynamic_framework_count;
+    pb_bytes_array_t *apple_framework_version;
+    bool has_using_zip_file;
+    bool using_zip_file;
+    bool has_deployment_type;
+    logs_proto_mobilesdk_ios_ICoreConfiguration_DeploymentType deployment_type;
+    pb_bytes_array_t *platform_info;
+    bool has_app_extensions;
+    int64_t app_extensions;
+    bool has_swizzling_enabled;
+    bool swizzling_enabled;
+    bool has_log_error_count;
+    int32_t log_error_count;
+    bool has_log_warning_count;
+    int32_t log_warning_count;
+    bool has_using_gdt;
+    bool using_gdt;
+/* @@protoc_insertion_point(struct:logs_proto_mobilesdk_ios_ICoreConfiguration) */
+} logs_proto_mobilesdk_ios_ICoreConfiguration;
+
+/* Default values for struct fields */
+
+/* Initializer values for message structs */
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_init_default {false, _logs_proto_mobilesdk_ios_ICoreConfiguration_ConfigurationType_MIN, NULL, false, 0, false, _logs_proto_mobilesdk_ios_ICoreConfiguration_BuildType_MIN, NULL, 0, NULL, 0, NULL, NULL, NULL, false, 0, NULL, NULL, NULL, false, _logs_proto_mobilesdk_ios_ICoreConfiguration_PodName_MIN, NULL, NULL, false, _logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_MIN, false, 0, NULL, NULL, NULL, false, 0, false, 0, false, 0, NULL, false, 0, false, _logs_proto_mobilesdk_ios_ICoreConfiguration_DeploymentType_MIN, NULL, false, 0, false, 0, false, 0, false, 0, false, 0}
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_init_zero {false, _logs_proto_mobilesdk_ios_ICoreConfiguration_ConfigurationType_MIN, NULL, false, 0, false, _logs_proto_mobilesdk_ios_ICoreConfiguration_BuildType_MIN, NULL, 0, NULL, 0, NULL, NULL, NULL, false, 0, NULL, NULL, NULL, false, _logs_proto_mobilesdk_ios_ICoreConfiguration_PodName_MIN, NULL, NULL, false, _logs_proto_mobilesdk_ios_ICoreConfiguration_ServiceType_MIN, false, 0, NULL, NULL, NULL, false, 0, false, 0, false, 0, NULL, false, 0, false, _logs_proto_mobilesdk_ios_ICoreConfiguration_DeploymentType_MIN, NULL, false, 0, false, 0, false, 0, false, 0, false, 0}
+
+/* Field tags (for use in manual encoding/decoding) */
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_pod_name_tag 16
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_configuration_type_tag 1
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_version_name_tag 2
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_icore_version_tag 18
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_sdk_version_tag 19
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_build_number_tag 3
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_build_type_tag 4
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_plist_version_tag 5
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_sdk_service_enabled_tag 6
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_sdk_service_installed_tag 7
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_sdk_name_tag 20
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_device_model_tag 9
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_os_version_tag 22
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_app_id_tag 10
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_project_number_tag 11
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_bundle_id_tag 12
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_client_id_tag 13
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_itunes_id_tag 23
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_min_supported_ios_version_tag 24
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_install_tag 14
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_use_default_app_tag 25
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_app_count_tag 21
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_deployed_in_app_store_tag 26
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_dynamic_framework_count_tag 27
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_apple_framework_version_tag 28
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_using_zip_file_tag 29
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_deployment_type_tag 30
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_platform_info_tag 31
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_app_extensions_tag 32
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_swizzling_enabled_tag 33
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_log_error_count_tag 34
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_log_warning_count_tag 35
+#define logs_proto_mobilesdk_ios_ICoreConfiguration_using_gdt_tag 36
+
+/* Struct field encoding specification for nanopb */
+extern const pb_field_t logs_proto_mobilesdk_ios_ICoreConfiguration_fields[34];
+
+/* Maximum encoded size of messages (where known) */
+/* logs_proto_mobilesdk_ios_ICoreConfiguration_size depends on runtime parameters */
+
+/* Message IDs (where set with "msgid" option) */
+#ifdef PB_MSGID
+
+#define FIREBASECORE_MESSAGES \
+
+
+#endif
+
+/* @@protoc_insertion_point(eof) */
+
+#endif

Pods/FirebaseCoreDiagnostics/LICENSE

@@ -0,0 +1,202 @@
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Pods/FirebaseCoreDiagnostics/README.md

@@ -0,0 +1,223 @@
+# Firebase iOS Open Source Development [![Build Status](https://travis-ci.org/firebase/firebase-ios-sdk.svg?branch=master)](https://travis-ci.org/firebase/firebase-ios-sdk)
+
+This repository contains a subset of the Firebase iOS SDK source. It currently
+includes FirebaseCore, FirebaseAuth, FirebaseDatabase, FirebaseFirestore,
+FirebaseFunctions, FirebaseInstanceID, FirebaseInAppMessaging,
+FirebaseInAppMessagingDisplay, FirebaseMessaging and FirebaseStorage.
+
+The repository also includes GoogleUtilities source. The
+[GoogleUtilities](GoogleUtilities/README.md) pod is
+a set of utilities used by Firebase and other Google products.
+
+Firebase is an app development platform with tools to help you build, grow and
+monetize your app. More information about Firebase can be found at
+[https://firebase.google.com](https://firebase.google.com).
+
+## Installation
+
+See the three subsections for details about three different installation methods.
+1. [Standard pod install](README.md#standard-pod-install)
+1. [Installing from the GitHub repo](README.md#installing-from-github)
+1. [Experimental Carthage](README.md#carthage-ios-only)
+
+### Standard pod install
+
+Go to
+[https://firebase.google.com/docs/ios/setup](https://firebase.google.com/docs/ios/setup).
+
+### Installing from GitHub
+
+For releases starting with 5.0.0, the source for each release is also deployed
+to CocoaPods master and available via standard
+[CocoaPods Podfile syntax](https://guides.cocoapods.org/syntax/podfile.html#pod).
+
+These instructions can be used to access the Firebase repo at other branches,
+tags, or commits.
+
+#### Background
+
+See
+[the Podfile Syntax Reference](https://guides.cocoapods.org/syntax/podfile.html#pod)
+for instructions and options about overriding pod source locations.
+
+#### Accessing Firebase Source Snapshots
+
+All of the official releases are tagged in this repo and available via CocoaPods. To access a local
+source snapshot or unreleased branch, use Podfile directives like the following:
+
+To access FirebaseFirestore via a branch:
+```
+pod 'FirebaseCore', :git => 'https://github.com/firebase/firebase-ios-sdk.git', :branch => 'master'
+pod 'FirebaseFirestore', :git => 'https://github.com/firebase/firebase-ios-sdk.git', :branch => 'master'
+```
+
+To access FirebaseMessaging via a checked out version of the firebase-ios-sdk repo do:
+
+```
+pod 'FirebaseCore', :path => '/path/to/firebase-ios-sdk'
+pod 'FirebaseMessaging', :path => '/path/to/firebase-ios-sdk'
+```
+
+### Carthage (iOS only)
+
+Instructions for the experimental Carthage distribution are at
+[Carthage](Carthage.md).
+
+### Rome
+
+Instructions for installing binary frameworks via
+[Rome](https://github.com/CocoaPods/Rome) are at [Rome](Rome.md).
+
+## Development
+
+To develop Firebase software in this repository, ensure that you have at least
+the following software:
+
+  * Xcode 10.1 (or later)
+  * CocoaPods 1.7.2 (or later)
+
+For the pod that you want to develop:
+
+`pod gen Firebase{name here}.podspec --local-sources=./ --auto-open`
+
+Firestore and Functions have self contained Xcode projects. See
+[Firestore/README.md](Firestore/README.md) and
+[Functions/README.md](Functions/README.md).
+
+### Adding a New Firebase Pod
+
+See [AddNewPod.md](AddNewPod.md).
+
+### Code Formatting
+
+To ensure that the code is formatted consistently, run the script
+[./scripts/style.sh](https://github.com/firebase/firebase-ios-sdk/blob/master/scripts/style.sh)
+before creating a PR.
+
+Travis will verify that any code changes are done in a style compliant way. Install
+`clang-format` and `swiftformat`.
+These commands will get the right versions:
+
+```
+brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/773cb75d360b58f32048f5964038d09825a507c8/Formula/clang-format.rb
+brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/3dfea1004e0736754bbf49673cca8aaed8a94089/Formula/swiftformat.rb
+```
+
+Note: if you already have a newer version of these installed you may need to
+`brew switch` to this version.
+
+### Running Unit Tests
+
+Select a scheme and press Command-u to build a component and run its unit tests.
+
+#### Viewing Code Coverage
+
+First, make sure that [xcov](https://github.com/nakiostudio/xcov) is installed with `gem install xcov`.
+
+After running the `AllUnitTests_iOS` scheme in Xcode, execute
+`xcov --workspace Firebase.xcworkspace --scheme AllUnitTests_iOS --output_directory xcov_output`
+at Example/ in the terminal. This will aggregate the coverage, and you can run `open xcov_output/index.html` to see the results.
+
+### Running Sample Apps
+In order to run the sample apps and integration tests, you'll need valid
+`GoogleService-Info.plist` files for those samples. The Firebase Xcode project contains dummy plist
+files without real values, but can be replaced with real plist files. To get your own
+`GoogleService-Info.plist` files:
+
+1. Go to the [Firebase Console](https://console.firebase.google.com/)
+2. Create a new Firebase project, if you don't already have one
+3. For each sample app you want to test, create a new Firebase app with the sample app's bundle
+identifier (e.g. `com.google.Database-Example`)
+4. Download the resulting `GoogleService-Info.plist` and replace the appropriate dummy plist file
+(e.g. in [Example/Database/App/](Example/Database/App/));
+
+Some sample apps like Firebase Messaging ([Example/Messaging/App](Example/Messaging/App)) require
+special Apple capabilities, and you will have to change the sample app to use a unique bundle
+identifier that you can control in your own Apple Developer account.
+
+## Specific Component Instructions
+See the sections below for any special instructions for those components.
+
+### Firebase Auth
+
+If you're doing specific Firebase Auth development, see
+[the Auth Sample README](Example/Auth/README.md) for instructions about
+building and running the FirebaseAuth pod along with various samples and tests.
+
+### Firebase Database
+
+To run the Database Integration tests, make your database authentication rules
+[public](https://firebase.google.com/docs/database/security/quickstart).
+
+### Firebase Storage
+
+To run the Storage Integration tests, follow the instructions in
+[FIRStorageIntegrationTests.m](Example/Storage/Tests/Integration/FIRStorageIntegrationTests.m).
+
+#### Push Notifications
+
+Push notifications can only be delivered to specially provisioned App IDs in the developer portal.
+In order to actually test receiving push notifications, you will need to:
+
+1. Change the bundle identifier of the sample app to something you own in your Apple Developer
+account, and enable that App ID for push notifications.
+2. You'll also need to
+[upload your APNs Provider Authentication Key or certificate to the Firebase Console](https://firebase.google.com/docs/cloud-messaging/ios/certs)
+at **Project Settings > Cloud Messaging > [Your Firebase App]**.
+3. Ensure your iOS device is added to your Apple Developer portal as a test device.
+
+#### iOS Simulator
+
+The iOS Simulator cannot register for remote notifications, and will not receive push notifications.
+In order to receive push notifications, you'll have to follow the steps above and run the app on a
+physical device.
+
+## Community Supported Efforts
+
+We've seen an amazing amount of interest and contributions to improve the Firebase SDKs, and we are
+very grateful!  We'd like to empower as many developers as we can to be able to use Firebase and
+participate in the Firebase community.
+
+### macOS and tvOS
+Thanks to contributions from the community, FirebaseAuth, FirebaseCore, FirebaseDatabase, FirebaseMessaging,
+FirebaseFirestore, FirebaseFunctions and FirebaseStorage now compile, run unit tests, and work on
+macOS and tvOS.
+
+For tvOS, checkout the [Sample](Example/tvOSSample).
+
+Keep in mind that macOS and tvOS are not officially supported by Firebase, and this repository is
+actively developed primarily for iOS. While we can catch basic unit test issues with Travis, there
+may be some changes where the SDK no longer works as expected on macOS or tvOS. If you encounter
+this, please [file an issue](https://github.com/firebase/firebase-ios-sdk/issues).
+
+Note that the Firebase pod is not available for macOS and tvOS.
+
+To install, add a subset of the following to the Podfile:
+
+```
+pod 'FirebaseAuth'
+pod 'FirebaseCore'
+pod 'FirebaseDatabase'
+pod 'FirebaseFirestore'
+pod 'FirebaseFunctions'
+pod 'FirebaseMessaging'
+pod 'FirebaseStorage'
+```
+
+## Roadmap
+
+See [Roadmap](ROADMAP.md) for more about the Firebase iOS SDK Open Source
+plans and directions.
+
+## Contributing
+
+See [Contributing](CONTRIBUTING.md) for more information on contributing to the Firebase
+iOS SDK.
+
+## License
+
+The contents of this repository is licensed under the
+[Apache License, version 2.0](http://www.apache.org/licenses/LICENSE-2.0).
+
+Your use of Firebase is governed by the
+[Terms of Service for Firebase Services](https://firebase.google.com/terms/).

Pods/FirebaseCoreDiagnosticsInterop/Interop/CoreDiagnostics/Public/FIRCoreDiagnosticsData.h

@@ -0,0 +1,63 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/** If present, is a BOOL wrapped in an NSNumber. */
+static NSString *const kFIRCDIsDataCollectionDefaultEnabledKey =
+    @"FIRCDIsDataCollectionDefaultEnabledKey";
+
+/** If present, is an int32_t wrapped in an NSNumber. */
+static NSString *const kFIRCDConfigurationTypeKey = @"FIRCDConfigurationTypeKey";
+
+/** If present, is an NSString. */
+static NSString *const kFIRCDSdkNameKey = @"FIRCDSdkNameKey";
+
+/** If present, is an NSString. */
+static NSString *const kFIRCDSdkVersionKey = @"FIRCDSdkVersionKey";
+
+/** If present, is an int32_t wrapped in an NSNumber. */
+static NSString *const kFIRCDllAppsCountKey = @"FIRCDllAppsCountKey";
+
+/** If present, is an NSString. */
+static NSString *const kFIRCDGoogleAppIDKey = @"FIRCDGoogleAppIDKey";
+
+/** If present, is an NSString. */
+static NSString *const kFIRCDBundleIDKey = @"FIRCDBundleID";
+
+/** If present, is a BOOL wrapped in an NSNumber. */
+static NSString *const kFIRCDUsingOptionsFromDefaultPlistKey =
+    @"FIRCDUsingOptionsFromDefaultPlistKey";
+
+/** If present, is an NSString. */
+static NSString *const kFIRCDLibraryVersionIDKey = @"FIRCDLibraryVersionIDKey";
+
+/** If present, is an NSString. */
+static NSString *const kFIRCDFirebaseUserAgentKey = @"FIRCDFirebaseUserAgentKey";
+
+/** Defines the interface of a data object needed to log diagnostics data. */
+@protocol FIRCoreDiagnosticsData <NSObject>
+
+@required
+
+/** A dictionary containing data (non-exhaustive) to be logged in diagnostics. */
+@property(nonatomic) NSDictionary<NSString *, id> *diagnosticObjects;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCoreDiagnosticsInterop/Interop/CoreDiagnostics/Public/FIRCoreDiagnosticsInterop.h

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+#import "FIRCoreDiagnosticsData.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/** Allows the interoperation of FirebaseCore and FirebaseCoreDiagnostics. */
+@protocol FIRCoreDiagnosticsInterop <NSObject>
+
+/** Sends the given diagnostics data.
+ *
+ * @param diagnosticsData The diagnostics data object to send.
+ */
++ (void)sendDiagnosticsData:(id<FIRCoreDiagnosticsData>)diagnosticsData;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseCoreDiagnosticsInterop/LICENSE

@@ -0,0 +1,202 @@
+
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+   See the License for the specific language governing permissions and
+   limitations under the License.

Pods/FirebaseCoreDiagnosticsInterop/README.md

@@ -0,0 +1,223 @@
+# Firebase iOS Open Source Development [![Build Status](https://travis-ci.org/firebase/firebase-ios-sdk.svg?branch=master)](https://travis-ci.org/firebase/firebase-ios-sdk)
+
+This repository contains a subset of the Firebase iOS SDK source. It currently
+includes FirebaseCore, FirebaseAuth, FirebaseDatabase, FirebaseFirestore,
+FirebaseFunctions, FirebaseInstanceID, FirebaseInAppMessaging,
+FirebaseInAppMessagingDisplay, FirebaseMessaging and FirebaseStorage.
+
+The repository also includes GoogleUtilities source. The
+[GoogleUtilities](GoogleUtilities/README.md) pod is
+a set of utilities used by Firebase and other Google products.
+
+Firebase is an app development platform with tools to help you build, grow and
+monetize your app. More information about Firebase can be found at
+[https://firebase.google.com](https://firebase.google.com).
+
+## Installation
+
+See the three subsections for details about three different installation methods.
+1. [Standard pod install](README.md#standard-pod-install)
+1. [Installing from the GitHub repo](README.md#installing-from-github)
+1. [Experimental Carthage](README.md#carthage-ios-only)
+
+### Standard pod install
+
+Go to
+[https://firebase.google.com/docs/ios/setup](https://firebase.google.com/docs/ios/setup).
+
+### Installing from GitHub
+
+For releases starting with 5.0.0, the source for each release is also deployed
+to CocoaPods master and available via standard
+[CocoaPods Podfile syntax](https://guides.cocoapods.org/syntax/podfile.html#pod).
+
+These instructions can be used to access the Firebase repo at other branches,
+tags, or commits.
+
+#### Background
+
+See
+[the Podfile Syntax Reference](https://guides.cocoapods.org/syntax/podfile.html#pod)
+for instructions and options about overriding pod source locations.
+
+#### Accessing Firebase Source Snapshots
+
+All of the official releases are tagged in this repo and available via CocoaPods. To access a local
+source snapshot or unreleased branch, use Podfile directives like the following:
+
+To access FirebaseFirestore via a branch:
+```
+pod 'FirebaseCore', :git => 'https://github.com/firebase/firebase-ios-sdk.git', :branch => 'master'
+pod 'FirebaseFirestore', :git => 'https://github.com/firebase/firebase-ios-sdk.git', :branch => 'master'
+```
+
+To access FirebaseMessaging via a checked out version of the firebase-ios-sdk repo do:
+
+```
+pod 'FirebaseCore', :path => '/path/to/firebase-ios-sdk'
+pod 'FirebaseMessaging', :path => '/path/to/firebase-ios-sdk'
+```
+
+### Carthage (iOS only)
+
+Instructions for the experimental Carthage distribution are at
+[Carthage](Carthage.md).
+
+### Rome
+
+Instructions for installing binary frameworks via
+[Rome](https://github.com/CocoaPods/Rome) are at [Rome](Rome.md).
+
+## Development
+
+To develop Firebase software in this repository, ensure that you have at least
+the following software:
+
+  * Xcode 10.1 (or later)
+  * CocoaPods 1.7.2 (or later)
+
+For the pod that you want to develop:
+
+`pod gen Firebase{name here}.podspec --local-sources=./ --auto-open`
+
+Firestore and Functions have self contained Xcode projects. See
+[Firestore/README.md](Firestore/README.md) and
+[Functions/README.md](Functions/README.md).
+
+### Adding a New Firebase Pod
+
+See [AddNewPod.md](AddNewPod.md).
+
+### Code Formatting
+
+To ensure that the code is formatted consistently, run the script
+[./scripts/style.sh](https://github.com/firebase/firebase-ios-sdk/blob/master/scripts/style.sh)
+before creating a PR.
+
+Travis will verify that any code changes are done in a style compliant way. Install
+`clang-format` and `swiftformat`.
+These commands will get the right versions:
+
+```
+brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/773cb75d360b58f32048f5964038d09825a507c8/Formula/clang-format.rb
+brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/3dfea1004e0736754bbf49673cca8aaed8a94089/Formula/swiftformat.rb
+```
+
+Note: if you already have a newer version of these installed you may need to
+`brew switch` to this version.
+
+### Running Unit Tests
+
+Select a scheme and press Command-u to build a component and run its unit tests.
+
+#### Viewing Code Coverage
+
+First, make sure that [xcov](https://github.com/nakiostudio/xcov) is installed with `gem install xcov`.
+
+After running the `AllUnitTests_iOS` scheme in Xcode, execute
+`xcov --workspace Firebase.xcworkspace --scheme AllUnitTests_iOS --output_directory xcov_output`
+at Example/ in the terminal. This will aggregate the coverage, and you can run `open xcov_output/index.html` to see the results.
+
+### Running Sample Apps
+In order to run the sample apps and integration tests, you'll need valid
+`GoogleService-Info.plist` files for those samples. The Firebase Xcode project contains dummy plist
+files without real values, but can be replaced with real plist files. To get your own
+`GoogleService-Info.plist` files:
+
+1. Go to the [Firebase Console](https://console.firebase.google.com/)
+2. Create a new Firebase project, if you don't already have one
+3. For each sample app you want to test, create a new Firebase app with the sample app's bundle
+identifier (e.g. `com.google.Database-Example`)
+4. Download the resulting `GoogleService-Info.plist` and replace the appropriate dummy plist file
+(e.g. in [Example/Database/App/](Example/Database/App/));
+
+Some sample apps like Firebase Messaging ([Example/Messaging/App](Example/Messaging/App)) require
+special Apple capabilities, and you will have to change the sample app to use a unique bundle
+identifier that you can control in your own Apple Developer account.
+
+## Specific Component Instructions
+See the sections below for any special instructions for those components.
+
+### Firebase Auth
+
+If you're doing specific Firebase Auth development, see
+[the Auth Sample README](Example/Auth/README.md) for instructions about
+building and running the FirebaseAuth pod along with various samples and tests.
+
+### Firebase Database
+
+To run the Database Integration tests, make your database authentication rules
+[public](https://firebase.google.com/docs/database/security/quickstart).
+
+### Firebase Storage
+
+To run the Storage Integration tests, follow the instructions in
+[FIRStorageIntegrationTests.m](Example/Storage/Tests/Integration/FIRStorageIntegrationTests.m).
+
+#### Push Notifications
+
+Push notifications can only be delivered to specially provisioned App IDs in the developer portal.
+In order to actually test receiving push notifications, you will need to:
+
+1. Change the bundle identifier of the sample app to something you own in your Apple Developer
+account, and enable that App ID for push notifications.
+2. You'll also need to
+[upload your APNs Provider Authentication Key or certificate to the Firebase Console](https://firebase.google.com/docs/cloud-messaging/ios/certs)
+at **Project Settings > Cloud Messaging > [Your Firebase App]**.
+3. Ensure your iOS device is added to your Apple Developer portal as a test device.
+
+#### iOS Simulator
+
+The iOS Simulator cannot register for remote notifications, and will not receive push notifications.
+In order to receive push notifications, you'll have to follow the steps above and run the app on a
+physical device.
+
+## Community Supported Efforts
+
+We've seen an amazing amount of interest and contributions to improve the Firebase SDKs, and we are
+very grateful!  We'd like to empower as many developers as we can to be able to use Firebase and
+participate in the Firebase community.
+
+### macOS and tvOS
+Thanks to contributions from the community, FirebaseAuth, FirebaseCore, FirebaseDatabase, FirebaseMessaging,
+FirebaseFirestore, FirebaseFunctions and FirebaseStorage now compile, run unit tests, and work on
+macOS and tvOS.
+
+For tvOS, checkout the [Sample](Example/tvOSSample).
+
+Keep in mind that macOS and tvOS are not officially supported by Firebase, and this repository is
+actively developed primarily for iOS. While we can catch basic unit test issues with Travis, there
+may be some changes where the SDK no longer works as expected on macOS or tvOS. If you encounter
+this, please [file an issue](https://github.com/firebase/firebase-ios-sdk/issues).
+
+Note that the Firebase pod is not available for macOS and tvOS.
+
+To install, add a subset of the following to the Podfile:
+
+```
+pod 'FirebaseAuth'
+pod 'FirebaseCore'
+pod 'FirebaseDatabase'
+pod 'FirebaseFirestore'
+pod 'FirebaseFunctions'
+pod 'FirebaseMessaging'
+pod 'FirebaseStorage'
+```
+
+## Roadmap
+
+See [Roadmap](ROADMAP.md) for more about the Firebase iOS SDK Open Source
+plans and directions.
+
+## Contributing
+
+See [Contributing](CONTRIBUTING.md) for more information on contributing to the Firebase
+iOS SDK.
+
+## License
+
+The contents of this repository is licensed under the
+[Apache License, version 2.0](http://www.apache.org/licenses/LICENSE-2.0).
+
+Your use of Firebase is governed by the
+[Terms of Service for Firebase Services](https://firebase.google.com/terms/).

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRIMessageCode.h

@@ -0,0 +1,167 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+// The format of the debug code will show in the log as: e.g.
+// for code 1000, it will show as I-IID001000.
+typedef NS_ENUM(NSInteger, FIRInstanceIDMessageCode) {
+  // DO NOT USE 2000, 2002.
+  kFIRInstanceIDMessageCodeFIRApp000 = 1000,  // I-IID001000
+  kFIRInstanceIDMessageCodeFIRApp001 = 1001,
+  kFIRInstanceIDMessageCodeFIRApp002 = 1002,
+  kFIRInstanceIDMessageCodeInternal001 = 2001,
+  kFIRInstanceIDMessageCodeInternal002 = 2002,
+  // FIRInstanceID.m
+  // DO NOT USE 4000.
+  kFIRInstanceIDMessageCodeInstanceID000 = 3000,
+  kFIRInstanceIDMessageCodeInstanceID001 = 3001,
+  kFIRInstanceIDMessageCodeInstanceID002 = 3002,
+  kFIRInstanceIDMessageCodeInstanceID003 = 3003,
+  kFIRInstanceIDMessageCodeInstanceID004 = 3004,
+  kFIRInstanceIDMessageCodeInstanceID005 = 3005,
+  kFIRInstanceIDMessageCodeInstanceID006 = 3006,
+  kFIRInstanceIDMessageCodeInstanceID007 = 3007,
+  kFIRInstanceIDMessageCodeInstanceID008 = 3008,
+  kFIRInstanceIDMessageCodeInstanceID009 = 3009,
+  kFIRInstanceIDMessageCodeInstanceID010 = 3010,
+  kFIRInstanceIDMessageCodeInstanceID011 = 3011,
+  kFIRInstanceIDMessageCodeInstanceID012 = 3012,
+  kFIRInstanceIDMessageCodeInstanceID013 = 3013,
+  kFIRInstanceIDMessageCodeInstanceID014 = 3014,
+  kFIRInstanceIDMessageCodeInstanceID015 = 3015,
+  kFIRInstanceIDMessageCodeRefetchingTokenForAPNS = 3016,
+  kFIRInstanceIDMessageCodeInstanceID017 = 3017,
+  kFIRInstanceIDMessageCodeInstanceID018 = 3018,
+  // FIRInstanceIDAuthService.m
+  kFIRInstanceIDMessageCodeAuthService000 = 5000,
+  kFIRInstanceIDMessageCodeAuthService001 = 5001,
+  kFIRInstanceIDMessageCodeAuthService002 = 5002,
+  kFIRInstanceIDMessageCodeAuthService003 = 5003,
+  kFIRInstanceIDMessageCodeAuthService004 = 5004,
+  kFIRInstanceIDMessageCodeAuthServiceCheckinInProgress = 5004,
+
+  // FIRInstanceIDBackupExcludedPlist.m
+  kFIRInstanceIDMessageCodeBackupExcludedPlist000 = 6000,
+  kFIRInstanceIDMessageCodeBackupExcludedPlist001 = 6001,
+  kFIRInstanceIDMessageCodeBackupExcludedPlist002 = 6002,
+  kFIRInstanceIDMessageCodeBackupExcludedPlistInvalidPlistEnum = 6003,
+  // FIRInstanceIDCheckinService.m
+  kFIRInstanceIDMessageCodeService000 = 7000,
+  kFIRInstanceIDMessageCodeService001 = 7001,
+  kFIRInstanceIDMessageCodeService002 = 7002,
+  kFIRInstanceIDMessageCodeService003 = 7003,
+  kFIRInstanceIDMessageCodeService004 = 7004,
+  kFIRInstanceIDMessageCodeService005 = 7005,
+  kFIRInstanceIDMessageCodeService006 = 7006,
+  kFIRInstanceIDInvalidNetworkSession = 7007,
+  kFIRInstanceIDInvalidSettingResponse = 7008,
+  // FIRInstanceIDCheckinStore.m
+  // DO NOT USE 8002, 8004 - 8008
+  kFIRInstanceIDMessageCodeCheckinStore000 = 8000,
+  kFIRInstanceIDMessageCodeCheckinStore001 = 8001,
+  kFIRInstanceIDMessageCodeCheckinStore003 = 8003,
+  kFIRInstanceIDMessageCodeCheckinStoreCheckinPlistDeleted = 8009,
+  kFIRInstanceIDMessageCodeCheckinStoreCheckinPlistSaved = 8010,
+  // FIRInstanceIDKeyPair.m
+  // DO NOT USE 9001, 9003
+  kFIRInstanceIDMessageCodeKeyPair000 = 9000,
+  kFIRInstanceIDMessageCodeKeyPair002 = 9002,
+  kFIRInstanceIDMessageCodeKeyPairMigrationError = 9004,
+  kFIRInstanceIDMessageCodeKeyPairMigrationSuccess = 9005,
+  kFIRInstanceIDMessageCodeKeyPairNoLegacyKeyPair = 9006,
+
+  // FIRInstanceIDKeyPairStore.m
+  kFIRInstanceIDMessageCodeKeyPairStore000 = 10000,
+  kFIRInstanceIDMessageCodeKeyPairStore001 = 10001,
+  kFIRInstanceIDMessageCodeKeyPairStore002 = 10002,
+  kFIRInstanceIDMessageCodeKeyPairStore003 = 10003,
+  kFIRInstanceIDMessageCodeKeyPairStore004 = 10004,
+  kFIRInstanceIDMessageCodeKeyPairStore005 = 10005,
+  kFIRInstanceIDMessageCodeKeyPairStore006 = 10006,
+  kFIRInstanceIDMessageCodeKeyPairStore007 = 10007,
+  kFIRInstanceIDMessageCodeKeyPairStore008 = 10008,
+  kFIRInstanceIDMessageCodeKeyPairStoreCouldNotLoadKeyPair = 10009,
+  // FIRInstanceIDKeyPairUtilities.m
+  kFIRInstanceIDMessageCodeKeyPairUtilities000 = 11000,
+  kFIRInstanceIDMessageCodeKeyPairUtilities001 = 11001,
+  kFIRInstanceIDMessageCodeKeyPairUtilitiesFirstConcatenateParamNil = 11002,
+
+  // DO NOT USE 12000 - 12014
+
+  // FIRInstanceIDStore.m
+  // DO NOT USE 13004, 13005, 13007, 13008, 13010, 13011, 13013, 13014
+  kFIRInstanceIDMessageCodeStore000 = 13000,
+  kFIRInstanceIDMessageCodeStore001 = 13001,
+  kFIRInstanceIDMessageCodeStore002 = 13002,
+  kFIRInstanceIDMessageCodeStore003 = 13003,
+  kFIRInstanceIDMessageCodeStore006 = 13006,
+  kFIRInstanceIDMessageCodeStore009 = 13009,
+  kFIRInstanceIDMessageCodeStore012 = 13012,
+  // FIRInstanceIDTokenManager.m
+  // DO NOT USE 14002, 14005
+  kFIRInstanceIDMessageCodeTokenManager000 = 14000,
+  kFIRInstanceIDMessageCodeTokenManager001 = 14001,
+  kFIRInstanceIDMessageCodeTokenManager003 = 14003,
+  kFIRInstanceIDMessageCodeTokenManager004 = 14004,
+  kFIRInstanceIDMessageCodeTokenManagerErrorDeletingFCMTokensOnAppReset = 14006,
+  kFIRInstanceIDMessageCodeTokenManagerDeletedFCMTokensOnAppReset = 14007,
+  kFIRInstanceIDMessageCodeTokenManagerSavedAppVersion = 14008,
+  kFIRInstanceIDMessageCodeTokenManagerErrorInvalidatingAllTokens = 14009,
+  kFIRInstanceIDMessageCodeTokenManagerAPNSChanged = 14010,
+  kFIRInstanceIDMessageCodeTokenManagerAPNSChangedTokenInvalidated = 14011,
+  kFIRInstanceIDMessageCodeTokenManagerInvalidateStaleToken = 14012,
+  // FIRInstanceIDTokenStore.m
+  // DO NOT USE 15002 - 15013
+  kFIRInstanceIDMessageCodeTokenStore000 = 15000,
+  kFIRInstanceIDMessageCodeTokenStore001 = 15001,
+  kFIRInstanceIDMessageCodeTokenStoreExceptionUnarchivingTokenInfo = 15015,
+
+  // DO NOT USE 16000, 18004
+
+  // FIRInstanceIDUtilities.m
+  kFIRInstanceIDMessageCodeUtilitiesMissingBundleIdentifier = 18000,
+  kFIRInstanceIDMessageCodeUtilitiesAppEnvironmentUtilNotAvailable = 18001,
+  kFIRInstanceIDMessageCodeUtilitiesCannotGetHardwareModel = 18002,
+  kFIRInstanceIDMessageCodeUtilitiesCannotGetSystemVersion = 18003,
+  // FIRInstanceIDTokenOperation.m
+  kFIRInstanceIDMessageCodeTokenOperationFailedToSignParams = 19000,
+  // FIRInstanceIDTokenFetchOperation.m
+  // DO NOT USE 20004, 20005
+  kFIRInstanceIDMessageCodeTokenFetchOperationFetchRequest = 20000,
+  kFIRInstanceIDMessageCodeTokenFetchOperationRequestError = 20001,
+  kFIRInstanceIDMessageCodeTokenFetchOperationBadResponse = 20002,
+  kFIRInstanceIDMessageCodeTokenFetchOperationBadTokenStructure = 20003,
+  // FIRInstanceIDTokenDeleteOperation.m
+  kFIRInstanceIDMessageCodeTokenDeleteOperationFetchRequest = 21000,
+  kFIRInstanceIDMessageCodeTokenDeleteOperationRequestError = 21001,
+  kFIRInstanceIDMessageCodeTokenDeleteOperationBadResponse = 21002,
+  // FIRInstanceIDTokenInfo.m
+  kFIRInstanceIDMessageCodeTokenInfoBadAPNSInfo = 22000,
+  kFIRInstanceIDMessageCodeTokenInfoFirebaseAppIDChanged = 22001,
+  kFIRInstanceIDMessageCodeTokenInfoLocaleChanged = 22002,
+  // FIRInstanceIDKeychain.m
+  kFIRInstanceIDKeychainReadItemError = 23000,
+  kFIRInstanceIDKeychainAddItemError = 23001,
+  kFIRInstanceIDKeychainDeleteItemError = 23002,
+  kFIRInstanceIDKeychainCreateKeyPairError = 23003,
+  kFIRInstanceIDKeychainUpdateItemError = 23004,
+
+  // FIRInstanceIDStringEncoding.m
+  kFIRInstanceIDStringEncodingBufferUnderflow = 24000,
+  kFIRInstanceIDStringEncodingBufferOverflow = 24001,
+
+};

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceID+Private.h

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FIRInstanceID.h"
+
+#import "FIRInstanceIDCheckinService.h"
+
+/**
+ * Internal API used by Firebase SDK teams by calling in reflection or internal teams.
+ */
+// TODO(chliangGoogle) Rename this to Internal.
+@interface FIRInstanceID (Private)
+
+/**
+ *  Fetches checkin info for the app. If the app has valid cached checkin preferences
+ *  they are returned instead of making a network request.
+ *
+ *  @param handler The completion handler to invoke once the request has completed.
+ */
+- (void)fetchCheckinInfoWithHandler:(nullable FIRInstanceIDDeviceCheckinCompletion)handler;
+
+/**
+ *  Get the InstanceID for the app. If an ID was created before and cached
+ *  successfully we will return that ID. If no cached ID exists we create
+ *  a new ID, cache it and return that.
+ *
+ *  This is a blocking call and should not really be called on the main thread.
+ *
+ *  @param error The error object that represents the error while trying to
+ *               retrieve the instance id.
+ *
+ *  @return The InstanceID for the app.
+ */
+- (nullable NSString *)appInstanceID:(NSError *_Nullable *_Nullable)error;
+
+@end

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceID+Private.m

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FIRInstanceID+Private.h"
+
+#import "FIRInstanceIDAuthService.h"
+#import "FIRInstanceIDKeyPairStore.h"
+#import "FIRInstanceIDTokenManager.h"
+
+@interface FIRInstanceID ()
+
+@property(nonatomic, readonly, strong) FIRInstanceIDTokenManager *tokenManager;
+@property(nonatomic, readonly, strong) FIRInstanceIDKeyPairStore *keyPairStore;
+
+@end
+
+@implementation FIRInstanceID (Private)
+
+// This method just wraps our pre-configured auth service to make the request.
+// This method is only needed by first-party users, like Remote Config.
+- (void)fetchCheckinInfoWithHandler:(FIRInstanceIDDeviceCheckinCompletion)handler {
+  [self.tokenManager.authService fetchCheckinInfoWithHandler:handler];
+}
+
+- (NSString *)appInstanceID:(NSError **)error {
+  return [self.keyPairStore appIdentityWithError:error];
+}
+
+@end

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDAPNSInfo.h

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ *  Represents an APNS device token and whether its environment is for sandbox.
+ *  It can read from and write to an NSDictionary for simple serialization.
+ */
+@interface FIRInstanceIDAPNSInfo : NSObject <NSCoding>
+
+/// The APNs device token, provided by the OS to the application delegate
+@property(nonatomic, readonly, strong) NSData *deviceToken;
+/// Represents whether or not this is deviceToken is for the sandbox
+/// environment, or production.
+@property(nonatomic, readonly, getter=isSandbox) BOOL sandbox;
+
+/**
+ *  Initializes the receiver with an APNs device token, and boolean
+ *  representing whether that token is for the sandbox environment.
+ *
+ *  @param deviceToken The APNs device token typically provided by the
+ *         operating system.
+ *  @param isSandbox   YES if the APNs device token is for the sandbox
+ *                     environment, or NO if it is for production.
+ *  @return An instance of FIRInstanceIDAPNSInfo.
+ */
+- (instancetype)initWithDeviceToken:(NSData *)deviceToken isSandbox:(BOOL)isSandbox;
+
+/**
+ *  Initializes the receiver from a token options dictionary containing data
+ *  within the `kFIRInstanceIDTokenOptionsAPNSKey` and
+ *  `kFIRInstanceIDTokenOptionsAPNSIsSandboxKey` keys. The token should be an
+ *  NSData blob, and the sandbox value should be an NSNumber
+ *  representing a boolean value.
+ *
+ *  @param dictionary A dictionary containing values under the keys
+ *          `kFIRInstanceIDTokenOptionsAPNSKey` and
+ *          `kFIRInstanceIDTokenOptionsAPNSIsSandboxKey`.
+ *  @return An instance of FIRInstanceIDAPNSInfo, or nil if the
+ *          dictionary data was invalid or missing.
+ */
+- (nullable instancetype)initWithTokenOptionsDictionary:(NSDictionary *)dictionary;
+
+- (BOOL)isEqualToAPNSInfo:(FIRInstanceIDAPNSInfo *)otherInfo;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDAPNSInfo.m

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FIRInstanceIDAPNSInfo.h"
+
+#import "FIRInstanceIDConstants.h"
+
+/// The key used to find the APNs device token in an archive.
+NSString *const kFIRInstanceIDAPNSInfoTokenKey = @"device_token";
+/// The key used to find the sandbox value in an archive.
+NSString *const kFIRInstanceIDAPNSInfoSandboxKey = @"sandbox";
+
+@implementation FIRInstanceIDAPNSInfo
+
+- (instancetype)initWithDeviceToken:(NSData *)deviceToken isSandbox:(BOOL)isSandbox {
+  self = [super init];
+  if (self) {
+    _deviceToken = [deviceToken copy];
+    _sandbox = isSandbox;
+  }
+  return self;
+}
+
+- (instancetype)initWithTokenOptionsDictionary:(NSDictionary *)dictionary {
+  id deviceToken = dictionary[kFIRInstanceIDTokenOptionsAPNSKey];
+  if (![deviceToken isKindOfClass:[NSData class]]) {
+    return nil;
+  }
+
+  id isSandbox = dictionary[kFIRInstanceIDTokenOptionsAPNSIsSandboxKey];
+  if (![isSandbox isKindOfClass:[NSNumber class]]) {
+    return nil;
+  }
+  self = [super init];
+  if (self) {
+    _deviceToken = (NSData *)deviceToken;
+    _sandbox = ((NSNumber *)isSandbox).boolValue;
+  }
+  return self;
+}
+
+#pragma mark - NSCoding
+
+- (nullable instancetype)initWithCoder:(NSCoder *)aDecoder {
+  id deviceToken = [aDecoder decodeObjectForKey:kFIRInstanceIDAPNSInfoTokenKey];
+  if (![deviceToken isKindOfClass:[NSData class]]) {
+    return nil;
+  }
+  BOOL isSandbox = [aDecoder decodeBoolForKey:kFIRInstanceIDAPNSInfoSandboxKey];
+  return [self initWithDeviceToken:(NSData *)deviceToken isSandbox:isSandbox];
+}
+
+- (void)encodeWithCoder:(NSCoder *)aCoder {
+  [aCoder encodeObject:self.deviceToken forKey:kFIRInstanceIDAPNSInfoTokenKey];
+  [aCoder encodeBool:self.sandbox forKey:kFIRInstanceIDAPNSInfoSandboxKey];
+}
+
+- (BOOL)isEqualToAPNSInfo:(FIRInstanceIDAPNSInfo *)otherInfo {
+  if ([super isEqual:otherInfo]) {
+    return YES;
+  }
+  return ([self.deviceToken isEqualToData:otherInfo.deviceToken] &&
+          self.isSandbox == otherInfo.isSandbox);
+}
+
+@end

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDAuthKeyChain.h

@@ -0,0 +1,98 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+extern NSString *__nonnull const kFIRInstanceIDKeychainWildcardIdentifier;
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ *  Wrapper around storing FCM auth data in iOS keychain.
+ */
+@interface FIRInstanceIDAuthKeychain : NSObject
+
+/**
+ *  Designated Initializer. Init a generic `SecClassGenericPassword` keychain with `identifier`
+ *  as the `kSecAttrGeneric`.
+ *
+ *  @param identifier The generic attribute to be used by the keychain.
+ *
+ *  @return A Keychain object with `kSecAttrGeneric` attribute set to identifier.
+ */
+- (instancetype)initWithIdentifier:(NSString *)identifier;
+
+/**
+ *  Get keychain items matching the given service and account. The service and/or account
+ *  can be a wildcard (`kFIRInstanceIDKeychainWildcardIdentifier`), which case the query
+ *  will include all items matching any services and/or accounts.
+ *
+ *  @param service The kSecAttrService used to save the password. Can be wildcard.
+ *  @param account The kSecAttrAccount used to save the password. Can be wildcard.
+ *
+ *  @return An array of |NSData|s matching the provided inputs.
+ */
+- (NSArray<NSData *> *)itemsMatchingService:(NSString *)service account:(NSString *)account;
+
+/**
+ *  Get keychain item for a given service and account.
+ *
+ *  @param service The kSecAttrService used to save the password.
+ *  @param account The kSecAttrAccount used to save the password.
+ *
+ *  @return A cached keychain item for a given account and service, or nil if it was not
+ *          found or could not be retrieved.
+ */
+- (NSData *)dataForService:(NSString *)service account:(NSString *)account;
+
+/**
+ *  Remove the cached items from the keychain matching the service, account and access group.
+ *  In case the items do not exist, YES is returned but with a valid error object with code
+ *  `errSecItemNotFound`.
+ *
+ *  @param service The kSecAttrService used to save the password.
+ *  @param account The kSecAttrAccount used to save the password.
+ *  @param handler The callback handler which is invoked when the remove operation is complete, with
+ *                 an error if there is any.
+ */
+- (void)removeItemsMatchingService:(NSString *)service
+                           account:(NSString *)account
+                           handler:(nullable void (^)(NSError *error))handler;
+
+/**
+ *  Set the data for a given service and account with a specific accessibility. If
+ *  accessibility is NULL we use `kSecAttrAccessibleAlwaysThisDeviceOnly` which
+ *  prevents backup and restore to iCloud, and works for app extension that can
+ *  execute right after a device is restarted (and not unlocked).
+ *
+ *  @param data          The data to save.
+ *  @param service       The `kSecAttrService` used to save the password.
+ *  @param accessibility The `kSecAttrAccessibility` used to save the password. If NULL
+ *                       set this to `kSecAttrAccessibleAlwaysThisDeviceOnly`.
+ *  @param account       The `kSecAttrAccount` used to save the password.
+ *  @param handler       The callback handler which is invoked when the add operation is complete,
+ *                       with an error if there is any.
+ *
+ */
+- (void)setData:(NSData *)data
+       forService:(NSString *)service
+    accessibility:(nullable CFTypeRef)accessibility
+          account:(NSString *)account
+          handler:(nullable void (^)(NSError *))handler;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDAuthKeyChain.m

@@ -0,0 +1,223 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FIRInstanceIDAuthKeyChain.h"
+#import "FIRInstanceIDKeychain.h"
+#import "FIRInstanceIDLogger.h"
+
+/**
+ *  The error type representing why we couldn't read data from the keychain.
+ */
+typedef NS_ENUM(int, FIRInstanceIDKeychainErrorType) {
+  kFIRInstanceIDKeychainErrorBadArguments = -1301,
+};
+
+NSString *const kFIRInstanceIDKeychainWildcardIdentifier = @"*";
+
+@interface FIRInstanceIDAuthKeychain ()
+
+@property(nonatomic, copy) NSString *generic;
+// cachedKeychainData is keyed by service and account, the value is an array of NSData.
+// It is used to cache the tokens per service, per account, as well as checkin data per service,
+// per account inside the keychain.
+@property(nonatomic)
+    NSMutableDictionary<NSString *, NSMutableDictionary<NSString *, NSArray<NSData *> *> *>
+        *cachedKeychainData;
+
+@end
+
+@implementation FIRInstanceIDAuthKeychain
+
+- (instancetype)initWithIdentifier:(NSString *)identifier {
+  self = [super init];
+  if (self) {
+    _generic = [identifier copy];
+    _cachedKeychainData = [[NSMutableDictionary alloc] init];
+  }
+  return self;
+}
+
++ (NSMutableDictionary *)keychainQueryForService:(NSString *)service
+                                         account:(NSString *)account
+                                         generic:(NSString *)generic {
+  NSDictionary *query = @{(__bridge id)kSecClass : (__bridge id)kSecClassGenericPassword};
+
+  NSMutableDictionary *finalQuery = [NSMutableDictionary dictionaryWithDictionary:query];
+  if ([generic length] && ![kFIRInstanceIDKeychainWildcardIdentifier isEqualToString:generic]) {
+    finalQuery[(__bridge NSString *)kSecAttrGeneric] = generic;
+  }
+  if ([account length] && ![kFIRInstanceIDKeychainWildcardIdentifier isEqualToString:account]) {
+    finalQuery[(__bridge NSString *)kSecAttrAccount] = account;
+  }
+  if ([service length] && ![kFIRInstanceIDKeychainWildcardIdentifier isEqualToString:service]) {
+    finalQuery[(__bridge NSString *)kSecAttrService] = service;
+  }
+  return finalQuery;
+}
+
+- (NSMutableDictionary *)keychainQueryForService:(NSString *)service account:(NSString *)account {
+  return [[self class] keychainQueryForService:service account:account generic:self.generic];
+}
+
+- (NSArray<NSData *> *)itemsMatchingService:(NSString *)service account:(NSString *)account {
+  // If query wildcard service, it asks for all the results, which always query from keychain.
+  if (![service isEqualToString:kFIRInstanceIDKeychainWildcardIdentifier] &&
+      ![account isEqualToString:kFIRInstanceIDKeychainWildcardIdentifier] &&
+      _cachedKeychainData[service][account]) {
+    // As long as service, account array exist, even it's empty, it means we've queried it before,
+    // returns the cache value.
+    return _cachedKeychainData[service][account];
+  }
+
+  NSMutableDictionary *keychainQuery = [self keychainQueryForService:service account:account];
+  NSMutableArray<NSData *> *results;
+  keychainQuery[(__bridge id)kSecReturnData] = (__bridge id)kCFBooleanTrue;
+#if TARGET_OS_IOS || TARGET_OS_TV
+  keychainQuery[(__bridge id)kSecReturnAttributes] = (__bridge id)kCFBooleanTrue;
+  keychainQuery[(__bridge id)kSecMatchLimit] = (__bridge id)kSecMatchLimitAll;
+  // FIRInstanceIDKeychain should only take a query and return a result, will handle the query here.
+  NSArray *passwordInfos =
+      CFBridgingRelease([[FIRInstanceIDKeychain sharedInstance] itemWithQuery:keychainQuery]);
+#elif TARGET_OS_OSX
+  keychainQuery[(__bridge id)kSecMatchLimit] = (__bridge id)kSecMatchLimitOne;
+  NSData *passwordInfos =
+      CFBridgingRelease([[FIRInstanceIDKeychain sharedInstance] itemWithQuery:keychainQuery]);
+#endif
+
+  if (!passwordInfos) {
+    // Nothing was found, simply return from this sync block.
+    // Make sure to label the cache entry empty, signaling that we've queried this entry.
+    if ([service isEqualToString:kFIRInstanceIDKeychainWildcardIdentifier] ||
+        [account isEqualToString:kFIRInstanceIDKeychainWildcardIdentifier]) {
+      // Do not update cache if it's wildcard query.
+      return @[];
+    } else if (_cachedKeychainData[service]) {
+      [_cachedKeychainData[service] setObject:@[] forKey:account];
+    } else {
+      [_cachedKeychainData setObject:[@{account : @[]} mutableCopy] forKey:service];
+    }
+    return @[];
+  }
+  results = [[NSMutableArray alloc] init];
+#if TARGET_OS_IOS || TARGET_OS_TV
+  NSInteger numPasswords = passwordInfos.count;
+  for (NSUInteger i = 0; i < numPasswords; i++) {
+    NSDictionary *passwordInfo = [passwordInfos objectAtIndex:i];
+    if (passwordInfo[(__bridge id)kSecValueData]) {
+      [results addObject:passwordInfo[(__bridge id)kSecValueData]];
+    }
+  }
+#elif TARGET_OS_OSX
+  [results addObject:passwordInfos];
+#endif
+  // We query the keychain because it didn't exist in cache, now query is done, update the result in
+  // the cache.
+  if ([service isEqualToString:kFIRInstanceIDKeychainWildcardIdentifier] ||
+      [account isEqualToString:kFIRInstanceIDKeychainWildcardIdentifier]) {
+    // Do not update cache if it's wildcard query.
+    return [results copy];
+  } else if (_cachedKeychainData[service]) {
+    [_cachedKeychainData[service] setObject:[results copy] forKey:account];
+  } else {
+    NSMutableDictionary *entry = [@{account : [results copy]} mutableCopy];
+    [_cachedKeychainData setObject:entry forKey:service];
+  }
+  return [results copy];
+}
+
+- (NSData *)dataForService:(NSString *)service account:(NSString *)account {
+  NSArray<NSData *> *items = [self itemsMatchingService:service account:account];
+  // If items is nil or empty, nil will be returned.
+  return items.firstObject;
+}
+
+- (void)removeItemsMatchingService:(NSString *)service
+                           account:(NSString *)account
+                           handler:(void (^)(NSError *error))handler {
+  if ([service isEqualToString:kFIRInstanceIDKeychainWildcardIdentifier]) {
+    // Delete all keychain items.
+    _cachedKeychainData = [[NSMutableDictionary alloc] init];
+  } else if ([account isEqualToString:kFIRInstanceIDKeychainWildcardIdentifier]) {
+    // Delete all entries under service,
+    if (_cachedKeychainData[service]) {
+      _cachedKeychainData[service] = [[NSMutableDictionary alloc] init];
+    }
+  } else if (_cachedKeychainData[service]) {
+    // We should keep the service/account entry instead of nil so we know
+    // it's "empty entry" instead of "not query from keychain yet".
+    [_cachedKeychainData[service] setObject:@[] forKey:account];
+  } else {
+    [_cachedKeychainData setObject:[@{account : @[]} mutableCopy] forKey:service];
+  }
+  NSMutableDictionary *keychainQuery = [self keychainQueryForService:service account:account];
+  [[FIRInstanceIDKeychain sharedInstance] removeItemWithQuery:keychainQuery handler:handler];
+}
+
+- (void)setData:(NSData *)data
+       forService:(NSString *)service
+    accessibility:(CFTypeRef)accessibility
+          account:(NSString *)account
+          handler:(void (^)(NSError *))handler {
+  if ([service isEqualToString:kFIRInstanceIDKeychainWildcardIdentifier] ||
+      [account isEqualToString:kFIRInstanceIDKeychainWildcardIdentifier]) {
+    if (handler) {
+      handler([NSError errorWithDomain:kFIRInstanceIDKeychainErrorDomain
+                                  code:kFIRInstanceIDKeychainErrorBadArguments
+                              userInfo:nil]);
+    }
+    return;
+  }
+  [self removeItemsMatchingService:service
+                           account:account
+                           handler:^(NSError *error) {
+                             if (error) {
+                               if (handler) {
+                                 handler(error);
+                               }
+                               return;
+                             }
+                             if (data.length > 0) {
+                               NSMutableDictionary *keychainQuery =
+                                   [self keychainQueryForService:service account:account];
+                               keychainQuery[(__bridge id)kSecValueData] = data;
+
+                               if (accessibility != NULL) {
+                                 keychainQuery[(__bridge id)kSecAttrAccessible] =
+                                     (__bridge id)accessibility;
+                               } else {
+                                 // Defaults to No backup
+                                 keychainQuery[(__bridge id)kSecAttrAccessible] =
+                                     (__bridge id)kSecAttrAccessibleAlwaysThisDeviceOnly;
+                               }
+                               [[FIRInstanceIDKeychain sharedInstance]
+                                   addItemWithQuery:keychainQuery
+                                            handler:handler];
+                             }
+                           }];
+  // Set the cache value. This must happen after removeItemsMatchingService:account:handler was
+  // called, so the cache value was reset before setting a new value.
+  if (_cachedKeychainData[service]) {
+    if (_cachedKeychainData[service][account]) {
+      _cachedKeychainData[service][account] = @[ data ];
+    } else {
+      [_cachedKeychainData[service] setObject:@[ data ] forKey:account];
+    }
+  } else {
+    [_cachedKeychainData setObject:[@{account : @[ data ]} mutableCopy] forKey:service];
+  }
+}
+
+@end

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDAuthService.h

@@ -0,0 +1,91 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+#import "FIRInstanceIDCheckinService.h"
+
+@class FIRInstanceIDCheckinPreferences;
+@class FIRInstanceIDStore;
+
+/**
+ *  FIRInstanceIDAuthService is responsible for retrieving, caching, and supplying checkin info
+ *  for the rest of Instance ID. A checkin can be scheduled, meaning that it will keep retrying the
+ *  checkin request until it is successful. A checkin can also be requested directly, with a
+ *  completion handler.
+ */
+@interface FIRInstanceIDAuthService : NSObject
+
+/**
+ *  Used only for testing. In addition to taking a store (for locally caching the checkin info), it
+ *  also takes a checkinService.
+ */
+- (instancetype)initWithCheckinService:(FIRInstanceIDCheckinService *)checkinService
+                                 store:(FIRInstanceIDStore *)store;
+
+/**
+ *  Initializes the auth service given a store (which provides the local caching of checkin info).
+ *  This initializer will create its own instance of FIRInstanceIDCheckinService.
+ */
+- (instancetype)initWithStore:(FIRInstanceIDStore *)store;
+
+#pragma mark - Checkin Service
+
+/**
+ *  Checks if the current deviceID and secret are valid or not.
+ *
+ *  @return YES if the checkin credentials are valid else NO.
+ */
+- (BOOL)hasValidCheckinInfo;
+
+/**
+ *  Fetch checkin info from the server. This would usually refresh the existing
+ *  checkin credentials for the current app.
+ *
+ *  @param handler The completion handler to invoke once the checkin info has been
+ *                 refreshed.
+ */
+- (void)fetchCheckinInfoWithHandler:(FIRInstanceIDDeviceCheckinCompletion)handler;
+
+/**
+ *  Schedule checkin. Will hit the network only if the currently loaded checkin
+ *  preferences are stale.
+ *
+ *  @param immediately YES if we want it to be scheduled immediately else NO.
+ */
+- (void)scheduleCheckin:(BOOL)immediately;
+
+/**
+ *  Returns the checkin preferences currently loaded in memory. The Checkin preferences
+ *  can be either valid or invalid.
+ *
+ *  @return The checkin preferences loaded in memory.
+ */
+- (FIRInstanceIDCheckinPreferences *)checkinPreferences;
+
+/**
+ *  Cancels any ongoing checkin fetch, if any.
+ */
+- (void)stopCheckinRequest;
+
+/**
+ *  Resets the checkin information.
+ *
+ *  @param handler       The callback handler which is invoked when checkin reset is complete,
+ *                       with an error if there is any.
+ */
+- (void)resetCheckinWithHandler:(void (^)(NSError *error))handler;
+
+@end

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDAuthService.m

@@ -0,0 +1,302 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FIRInstanceIDAuthService.h"
+
+#import "FIRInstanceIDCheckinPreferences+Internal.h"
+#import "FIRInstanceIDCheckinPreferences.h"
+#import "FIRInstanceIDCheckinPreferences_Private.h"
+#import "FIRInstanceIDConstants.h"
+#import "FIRInstanceIDDefines.h"
+#import "FIRInstanceIDLogger.h"
+#import "FIRInstanceIDStore.h"
+#import "NSError+FIRInstanceID.h"
+
+// Max time interval between checkin retry in seconds.
+static const int64_t kMaxCheckinRetryIntervalInSeconds = 1 << 5;
+
+@interface FIRInstanceIDAuthService ()
+
+// Used to retrieve and cache the checkin info to disk and Keychain.
+@property(nonatomic, readwrite, strong) FIRInstanceIDStore *store;
+// Used to perform single checkin fetches.
+@property(nonatomic, readwrite, strong) FIRInstanceIDCheckinService *checkinService;
+// The current checkin info. It will be compared to what is retrieved to determine whether it is
+// different than what is in the cache.
+@property(nonatomic, readwrite, strong) FIRInstanceIDCheckinPreferences *checkinPreferences;
+
+// This array will track multiple handlers waiting for checkin to be performed. When a checkin
+// request completes, all the handlers will be notified.
+// Changes to the checkinHandlers array should happen in a thread-safe manner.
+@property(nonatomic, readonly, strong)
+    NSMutableArray<FIRInstanceIDDeviceCheckinCompletion> *checkinHandlers;
+
+// This is set to true if there is a checkin request in-flight.
+@property(atomic, readwrite, assign) BOOL isCheckinInProgress;
+// This timer is used a perform checkin retries. It is cancellable.
+@property(atomic, readwrite, strong) NSTimer *scheduledCheckinTimer;
+// The number of times checkin has been retried during a scheduled checkin.
+@property(atomic, readwrite, assign) int checkinRetryCount;
+
+@end
+
+@implementation FIRInstanceIDAuthService
+
+- (instancetype)initWithCheckinService:(FIRInstanceIDCheckinService *)checkinService
+                                 store:(FIRInstanceIDStore *)store {
+  self = [super init];
+  if (self) {
+    _store = store;
+    _checkinPreferences = [_store cachedCheckinPreferences];
+    _checkinService = checkinService;
+    _checkinHandlers = [NSMutableArray array];
+  }
+  return self;
+}
+
+- (void)dealloc {
+  [_scheduledCheckinTimer invalidate];
+}
+
+- (instancetype)initWithStore:(FIRInstanceIDStore *)store {
+  FIRInstanceIDCheckinService *checkinService = [[FIRInstanceIDCheckinService alloc] init];
+  return [self initWithCheckinService:checkinService store:store];
+}
+
+#pragma mark - Schedule Checkin
+
+- (void)scheduleCheckin:(BOOL)immediately {
+  // Checkin is still valid, so a remote checkin is not required.
+  if ([self.checkinPreferences hasValidCheckinInfo]) {
+    return;
+  }
+
+  // Checkin is already scheduled, so this (non-immediate) request can be ignored.
+  if (!immediately && [self.scheduledCheckinTimer isValid]) {
+    FIRInstanceIDLoggerDebug(kFIRInstanceIDMessageCodeAuthService000,
+                             @"Checkin sync already scheduled. Will not schedule.");
+    return;
+  }
+
+  if (immediately) {
+    [self performScheduledCheckin];
+  } else {
+    int64_t checkinRetryDuration = [self calculateNextCheckinRetryIntervalInSeconds];
+    [self startCheckinTimerWithDuration:(NSTimeInterval)checkinRetryDuration];
+  }
+}
+
+- (void)startCheckinTimerWithDuration:(NSTimeInterval)timerDuration {
+  self.scheduledCheckinTimer =
+      [NSTimer scheduledTimerWithTimeInterval:timerDuration
+                                       target:self
+                                     selector:@selector(onScheduledCheckinTimerFired:)
+                                     userInfo:nil
+                                      repeats:NO];
+  // Add some tolerance to the timer, to allow iOS to be more flexible with this timer
+  self.scheduledCheckinTimer.tolerance = 0.5;
+}
+
+- (void)clearScheduledCheckinTimer {
+  [self.scheduledCheckinTimer invalidate];
+  self.scheduledCheckinTimer = nil;
+}
+
+- (void)onScheduledCheckinTimerFired:(NSTimer *)timer {
+  [self performScheduledCheckin];
+}
+
+- (void)performScheduledCheckin {
+  // No checkin scheduled as of now.
+  [self clearScheduledCheckinTimer];
+
+  // Checkin is still valid, so a remote checkin is not required.
+  if ([self.checkinPreferences hasValidCheckinInfo]) {
+    return;
+  }
+
+  FIRInstanceID_WEAKIFY(self);
+  [self
+      fetchCheckinInfoWithHandler:^(FIRInstanceIDCheckinPreferences *preferences, NSError *error) {
+        FIRInstanceID_STRONGIFY(self);
+        self.checkinRetryCount++;
+
+        if (error) {
+          FIRInstanceIDLoggerDebug(kFIRInstanceIDMessageCodeAuthService001, @"Checkin error %@.",
+                                   error);
+
+          dispatch_async(dispatch_get_main_queue(), ^{
+            // Schedule another checkin
+            [self scheduleCheckin:NO];
+          });
+
+        } else {
+          FIRInstanceIDLoggerDebug(kFIRInstanceIDMessageCodeAuthService002, @"Checkin success.");
+        }
+      }];
+}
+
+- (int64_t)calculateNextCheckinRetryIntervalInSeconds {
+  // persistent failures can lead to overflow prevent that.
+  if (self.checkinRetryCount >= 10) {
+    return kMaxCheckinRetryIntervalInSeconds;
+  }
+  return MIN(1 << self.checkinRetryCount, kMaxCheckinRetryIntervalInSeconds);
+}
+
+#pragma mark - Checkin Service
+
+- (BOOL)hasValidCheckinInfo {
+  return [self.checkinPreferences hasValidCheckinInfo];
+}
+
+- (void)fetchCheckinInfoWithHandler:(nonnull FIRInstanceIDDeviceCheckinCompletion)handler {
+  // Perform any changes to self.checkinHandlers and _isCheckinInProgress in a thread-safe way.
+  @synchronized(self) {
+    [self.checkinHandlers addObject:handler];
+
+    if (_isCheckinInProgress) {
+      // Nothing more to do until our checkin request is done
+      FIRInstanceIDLoggerDebug(kFIRInstanceIDMessageCodeAuthServiceCheckinInProgress,
+                               @"Checkin is in progress\n");
+      return;
+    }
+  }
+
+  // Checkin is still valid, so a remote checkin is not required.
+  if ([self.checkinPreferences hasValidCheckinInfo]) {
+    [self notifyCheckinHandlersWithCheckin:self.checkinPreferences error:nil];
+    return;
+  }
+
+  @synchronized(self) {
+    _isCheckinInProgress = YES;
+  }
+  [self.checkinService
+      checkinWithExistingCheckin:self.checkinPreferences
+                      completion:^(FIRInstanceIDCheckinPreferences *checkinPreferences,
+                                   NSError *error) {
+                        @synchronized(self) {
+                          self->_isCheckinInProgress = NO;
+                        }
+                        if (error) {
+                          FIRInstanceIDLoggerDebug(kFIRInstanceIDMessageCodeAuthService003,
+                                                   @"Failed to checkin device %@", error);
+                          [self notifyCheckinHandlersWithCheckin:nil error:error];
+                          return;
+                        }
+
+                        FIRInstanceIDLoggerDebug(kFIRInstanceIDMessageCodeAuthService004,
+                                                 @"Successfully got checkin credentials");
+                        BOOL hasSameCachedPreferences =
+                            [self cachedCheckinMatchesCheckin:checkinPreferences];
+                        checkinPreferences.hasPreCachedAuthCredentials = hasSameCachedPreferences;
+
+                        // Update to the most recent checkin preferences
+                        self.checkinPreferences = checkinPreferences;
+
+                        // Save the checkin info to disk
+                        // Keychain might not be accessible, so confirm that checkin preferences can
+                        // be saved
+                        [self.store
+                            saveCheckinPreferences:checkinPreferences
+                                           handler:^(NSError *checkinSaveError) {
+                                             if (checkinSaveError && !hasSameCachedPreferences) {
+                                               // The checkin info was new, but it couldn't be
+                                               // written to the Keychain. Delete any stuff that was
+                                               // cached in memory. This doesn't delete any
+                                               // previously persisted preferences.
+                                               FIRInstanceIDLoggerError(
+                                                   kFIRInstanceIDMessageCodeService004,
+                                                   @"Unable to save checkin info, resetting "
+                                                   @"checkin preferences "
+                                                    "in memory.");
+                                               [checkinPreferences reset];
+                                               [self
+                                                   notifyCheckinHandlersWithCheckin:nil
+                                                                              error:
+                                                                                  checkinSaveError];
+                                             } else {
+                                               // The checkin is either new, or it was the same (and
+                                               // it couldn't be saved). Either way, report that the
+                                               // checkin preferences were received successfully.
+                                               [self notifyCheckinHandlersWithCheckin:
+                                                         checkinPreferences
+                                                                                error:nil];
+                                               if (!hasSameCachedPreferences) {
+                                                 // Checkin is new.
+                                                 // Notify any listeners that might be waiting for
+                                                 // checkin to be fetched, such as Firebase
+                                                 // Messaging (for its MCS connection).
+                                                 dispatch_async(dispatch_get_main_queue(), ^{
+                                                   [[NSNotificationCenter defaultCenter]
+                                                       postNotificationName:
+                                                           kFIRInstanceIDCheckinFetchedNotification
+                                                                     object:nil];
+                                                 });
+                                               }
+                                             }
+                                           }];
+                      }];
+}
+
+- (FIRInstanceIDCheckinPreferences *)checkinPreferences {
+  return _checkinPreferences;
+}
+
+- (void)stopCheckinRequest {
+  [self.checkinService stopFetching];
+}
+
+- (void)resetCheckinWithHandler:(void (^)(NSError *error))handler {
+  [self.store removeCheckinPreferencesWithHandler:^(NSError *error) {
+    if (!error) {
+      self.checkinPreferences = nil;
+    }
+    if (handler) {
+      handler(error);
+    }
+  }];
+}
+
+#pragma mark - Private
+
+/**
+ *  Goes through the current list of checkin handlers and fires them with the same checkin and/or
+ *  error info. The checkin handlers will get cleared after.
+ */
+- (void)notifyCheckinHandlersWithCheckin:(nullable FIRInstanceIDCheckinPreferences *)checkin
+                                   error:(nullable NSError *)error {
+  @synchronized(self) {
+    for (FIRInstanceIDDeviceCheckinCompletion handler in self.checkinHandlers) {
+      handler(checkin, error);
+    }
+    [self.checkinHandlers removeAllObjects];
+  }
+}
+
+/**
+ *  Given a |checkin|, it will compare it to the current checkinPreferences to see if the
+ *  deviceID and secretToken are the same.
+ */
+- (BOOL)cachedCheckinMatchesCheckin:(FIRInstanceIDCheckinPreferences *)checkin {
+  if (self.checkinPreferences && checkin) {
+    return ([self.checkinPreferences.deviceID isEqualToString:checkin.deviceID] &&
+            [self.checkinPreferences.secretToken isEqualToString:checkin.secretToken]);
+  }
+  return NO;
+}
+@end

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDBackupExcludedPlist.h

@@ -0,0 +1,81 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+@interface FIRInstanceIDBackupExcludedPlist : NSObject
+
+/**
+ *  Caches the plist contents in memory so we don't hit the disk each time we want
+ *  to query something in the plist. This is loaded lazily i.e. if you write to the
+ *  plist the contents you want to write will be stored here if the write was
+ *  successful. The other case where it is loaded is if you read the plist contents
+ *  by calling `contentAsDictionary`.
+ *
+ *  In case you write to the plist and then try to read the file using
+ *  `contentAsDictionary` we would just return the cachedPlistContents since it would
+ *  represent the disk contents.
+ */
+@property(nonatomic, readonly, strong) NSDictionary *cachedPlistContents;
+
+/**
+ *  Init a backup excluded plist file.
+ *
+ *  @param fileName                       The filename for the plist file.
+ *  @param subDirectory The subdirectory in Application Support to save the plist.
+ *
+ *  @return Helper which allows to read write data to a backup excluded plist.
+ */
+- (instancetype)initWithFileName:(NSString *)fileName subDirectory:(NSString *)subDirectory;
+
+/**
+ *  Write dictionary data to the backup excluded plist file. If the file does not exist
+ *  it would be created before writing to it.
+ *
+ *  @param dict  The data to be written to the plist.
+ *  @param error The error object if any while writing the data.
+ *
+ *  @return YES if the write was successful else NO.
+ */
+- (BOOL)writeDictionary:(NSDictionary *)dict error:(NSError **)error;
+
+/**
+ *  Delete the backup excluded plist created with the above filename.
+ *
+ *  @param error The error object if any while deleting the file.
+ *
+ *  @return YES If the delete was successful else NO.
+ */
+- (BOOL)deleteFile:(NSError **)error;
+
+/**
+ *  The contents of the plist file. We also store the contents of the file in-memory.
+ *  If the in-memory contents are valid we return the in-memory contents else we read
+ *  the file from disk.
+ *
+ *  @return A dictionary object that contains the contents of the plist file if the file
+ *          exists else nil.
+ */
+- (NSDictionary *)contentAsDictionary;
+
+/**
+ *  Check if the plist exists on the disk or not.
+ *
+ *  @return YES if the file exists on the disk else NO.
+ */
+- (BOOL)doesFileExist;
+
+@end

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDBackupExcludedPlist.m

@@ -0,0 +1,202 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FIRInstanceIDBackupExcludedPlist.h"
+
+#import "FIRInstanceIDLogger.h"
+
+typedef enum : NSUInteger {
+  FIRInstanceIDPlistDirectoryUnknown,
+  FIRInstanceIDPlistDirectoryDocuments,
+  FIRInstanceIDPlistDirectoryApplicationSupport,
+} FIRInstanceIDPlistDirectory;
+
+@interface FIRInstanceIDBackupExcludedPlist ()
+
+@property(nonatomic, readwrite, copy) NSString *fileName;
+@property(nonatomic, readwrite, copy) NSString *subDirectoryName;
+@property(nonatomic, readwrite, assign) BOOL fileInStandardDirectory;
+
+@property(nonatomic, readwrite, strong) NSDictionary *cachedPlistContents;
+
+@end
+
+@implementation FIRInstanceIDBackupExcludedPlist
+
+- (instancetype)initWithFileName:(NSString *)fileName subDirectory:(NSString *)subDirectory {
+  self = [super init];
+  if (self) {
+    _fileName = [fileName copy];
+    _subDirectoryName = [subDirectory copy];
+#if TARGET_OS_IOS
+    _fileInStandardDirectory = [self moveToApplicationSupportSubDirectory:subDirectory];
+#else
+    // For tvOS and macOS, we never store the content in document folder, so
+    // the migration is unnecessary.
+    _fileInStandardDirectory = YES;
+#endif
+  }
+  return self;
+}
+
+- (BOOL)writeDictionary:(NSDictionary *)dict error:(NSError **)error {
+  NSString *path = [self plistPathInDirectory:[self plistDirectory]];
+  if (![dict writeToFile:path atomically:YES]) {
+    FIRInstanceIDLoggerError(kFIRInstanceIDMessageCodeBackupExcludedPlist000,
+                             @"Failed to write to %@.plist", self.fileName);
+    return NO;
+  }
+
+  // Successfully wrote contents -- change the in-memory contents
+  self.cachedPlistContents = [dict copy];
+
+  NSURL *URL = [NSURL fileURLWithPath:path];
+  if (error) {
+    *error = nil;
+  }
+
+  NSDictionary *preferences = [URL resourceValuesForKeys:@[ NSURLIsExcludedFromBackupKey ]
+                                                   error:error];
+  if ([preferences[NSURLIsExcludedFromBackupKey] boolValue]) {
+    return YES;
+  }
+
+  BOOL success = [URL setResourceValue:@(YES) forKey:NSURLIsExcludedFromBackupKey error:error];
+  if (!success) {
+    FIRInstanceIDLoggerError(kFIRInstanceIDMessageCodeBackupExcludedPlist001,
+                             @"Error excluding %@ from backup, %@", [URL lastPathComponent],
+                             error ? *error : @"");
+  }
+  return success;
+}
+
+- (BOOL)deleteFile:(NSError **)error {
+  BOOL success = YES;
+  NSString *path = [self plistPathInDirectory:[self plistDirectory]];
+  if ([[NSFileManager defaultManager] fileExistsAtPath:path]) {
+    success = [[NSFileManager defaultManager] removeItemAtPath:path error:error];
+  }
+  // remove the in-memory contents
+  self.cachedPlistContents = nil;
+  return success;
+}
+
+- (NSDictionary *)contentAsDictionary {
+  if (!self.cachedPlistContents) {
+    NSString *path = [self plistPathInDirectory:[self plistDirectory]];
+    if ([[NSFileManager defaultManager] fileExistsAtPath:path]) {
+      self.cachedPlistContents = [[NSDictionary alloc] initWithContentsOfFile:path];
+    }
+  }
+  return self.cachedPlistContents;
+}
+
+- (BOOL)moveToApplicationSupportSubDirectory:(NSString *)subDirectoryName {
+  NSArray *directoryPaths =
+      NSSearchPathForDirectoriesInDomains([self supportedDirectory], NSUserDomainMask, YES);
+  // This only going to happen inside iOS so it is an applicationSupportDirectory.
+  NSString *applicationSupportDirPath = directoryPaths.lastObject;
+  NSArray *components = @[ applicationSupportDirPath, subDirectoryName ];
+  NSString *subDirectoryPath = [NSString pathWithComponents:components];
+  BOOL hasSubDirectory;
+  if (![[NSFileManager defaultManager] fileExistsAtPath:subDirectoryPath
+                                            isDirectory:&hasSubDirectory]) {
+    // Cannot move to non-existent directory
+    return NO;
+  }
+
+  if ([self doesFileExistInDirectory:FIRInstanceIDPlistDirectoryDocuments]) {
+    NSString *oldPlistPath = [self plistPathInDirectory:FIRInstanceIDPlistDirectoryDocuments];
+    NSString *newPlistPath =
+        [self plistPathInDirectory:FIRInstanceIDPlistDirectoryApplicationSupport];
+    if ([self doesFileExistInDirectory:FIRInstanceIDPlistDirectoryApplicationSupport]) {
+      // File exists in both Documents and ApplicationSupport
+      return NO;
+    }
+    NSError *moveError;
+    if (![[NSFileManager defaultManager] moveItemAtPath:oldPlistPath
+                                                 toPath:newPlistPath
+                                                  error:&moveError]) {
+      FIRInstanceIDLoggerError(kFIRInstanceIDMessageCodeBackupExcludedPlist002,
+                               @"Failed to move file %@ from %@ to %@. Error: %@", self.fileName,
+                               oldPlistPath, newPlistPath, moveError);
+      return NO;
+    }
+  }
+  // We moved the file if it existed, otherwise we didn't need to do anything
+  return YES;
+}
+
+- (BOOL)doesFileExist {
+  return [self doesFileExistInDirectory:[self plistDirectory]];
+}
+
+#pragma mark - Private
+
+- (FIRInstanceIDPlistDirectory)plistDirectory {
+  if (_fileInStandardDirectory) {
+    return FIRInstanceIDPlistDirectoryApplicationSupport;
+  } else {
+    return FIRInstanceIDPlistDirectoryDocuments;
+  };
+}
+
+- (NSString *)plistPathInDirectory:(FIRInstanceIDPlistDirectory)directory {
+  return [self pathWithName:self.fileName inDirectory:directory];
+}
+
+- (NSString *)pathWithName:(NSString *)plistName
+               inDirectory:(FIRInstanceIDPlistDirectory)directory {
+  NSArray *directoryPaths;
+  NSArray *components = @[];
+  NSString *plistNameWithExtension = [NSString stringWithFormat:@"%@.plist", plistName];
+  switch (directory) {
+    case FIRInstanceIDPlistDirectoryDocuments:
+      directoryPaths =
+          NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
+      components = @[ directoryPaths.lastObject, plistNameWithExtension ];
+      break;
+
+    case FIRInstanceIDPlistDirectoryApplicationSupport:
+      directoryPaths =
+          NSSearchPathForDirectoriesInDomains([self supportedDirectory], NSUserDomainMask, YES);
+      components = @[ directoryPaths.lastObject, _subDirectoryName, plistNameWithExtension ];
+      break;
+
+    default:
+      FIRInstanceIDLoggerError(kFIRInstanceIDMessageCodeBackupExcludedPlistInvalidPlistEnum,
+                               @"Invalid plist directory type: %lu", (unsigned long)directory);
+      NSAssert(NO, @"Invalid plist directory type: %lu", (unsigned long)directory);
+      break;
+  }
+
+  return [NSString pathWithComponents:components];
+}
+
+- (BOOL)doesFileExistInDirectory:(FIRInstanceIDPlistDirectory)directory {
+  NSString *path = [self plistPathInDirectory:directory];
+  return [[NSFileManager defaultManager] fileExistsAtPath:path];
+}
+
+- (NSSearchPathDirectory)supportedDirectory {
+#if TARGET_OS_TV
+  return NSCachesDirectory;
+#else
+  return NSApplicationSupportDirectory;
+#endif
+}
+
+@end

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDCheckinPreferences+Internal.h

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FIRInstanceIDCheckinPreferences.h"
+
+@interface FIRInstanceIDCheckinPreferences (Internal)
+
+/**
+ *  Parse the checkin auth credentials saved in the Keychain to initialize checkin
+ *  preferences.
+ *
+ *  @param keychainContent The checkin auth credentials saved in the Keychain.
+ *
+ *  @return A valid checkin preferences object if the checkin auth credentials in the
+ *          keychain can be parsed successfully else nil.
+ */
++ (FIRInstanceIDCheckinPreferences *)preferencesFromKeychainContents:(NSString *)keychainContent;
+
+/**
+ *  Default initializer for InstanceID checkin preferences.
+ *
+ *  @param deviceID    The deviceID for the app.
+ *  @param secretToken The secret token the app uses to authenticate with the server.
+ *
+ *  @return A checkin preferences object with given deviceID and secretToken.
+ */
+- (instancetype)initWithDeviceID:(NSString *)deviceID secretToken:(NSString *)secretToken;
+
+/**
+ *  Update checkin preferences from the preferences dict persisted as a plist. The dict contains
+ *  all the checkin preferences retrieved from the server except the deviceID and secret which
+ *  are stored in the Keychain.
+ *
+ *  @param checkinPlistContent The checkin preferences saved in a plist on the disk.
+ */
+- (void)updateWithCheckinPlistContents:(NSDictionary *)checkinPlistContent;
+
+/**
+ *  Reset the current checkin preferences object.
+ */
+- (void)reset;
+
+/**
+ *  The string that contains the checkin auth credentials i.e. deviceID and secret. This
+ *  needs to be stored in the Keychain.
+ *
+ *  @return The checkin auth credential string containing the deviceID and secret.
+ */
+- (NSString *)checkinKeychainContent;
+
+@end

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDCheckinPreferences+Internal.m

@@ -0,0 +1,112 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FIRInstanceIDCheckinPreferences+Internal.h"
+
+#import "FIRInstanceIDCheckinService.h"
+#import "FIRInstanceIDUtilities.h"
+
+static NSString *const kCheckinKeychainContentSeparatorString = @"|";
+
+@interface FIRInstanceIDCheckinPreferences ()
+
+@property(nonatomic, readwrite, copy) NSString *deviceID;
+@property(nonatomic, readwrite, copy) NSString *secretToken;
+@property(nonatomic, readwrite, copy) NSString *digest;
+@property(nonatomic, readwrite, copy) NSString *versionInfo;
+@property(nonatomic, readwrite, copy) NSString *deviceDataVersion;
+
+@property(nonatomic, readwrite, strong) NSMutableDictionary *gServicesData;
+@property(nonatomic, readwrite, assign) int64_t lastCheckinTimestampMillis;
+
+@end
+
+@implementation FIRInstanceIDCheckinPreferences (Internal)
+
++ (FIRInstanceIDCheckinPreferences *)preferencesFromKeychainContents:(NSString *)keychainContent {
+  NSString *deviceID = [self checkinDeviceIDFromKeychainContent:keychainContent];
+  NSString *secret = [self checkinSecretFromKeychainContent:keychainContent];
+  if ([deviceID length] && [secret length]) {
+    return [[FIRInstanceIDCheckinPreferences alloc] initWithDeviceID:deviceID secretToken:secret];
+  } else {
+    return nil;
+  }
+}
+
+- (instancetype)initWithDeviceID:(NSString *)deviceID secretToken:(NSString *)secretToken {
+  self = [super init];
+  if (self) {
+    self.deviceID = [deviceID copy];
+    self.secretToken = [secretToken copy];
+  }
+  return self;
+}
+
+- (void)reset {
+  self.deviceID = nil;
+  self.secretToken = nil;
+  self.digest = nil;
+  self.versionInfo = nil;
+  self.gServicesData = nil;
+  self.deviceDataVersion = nil;
+  self.lastCheckinTimestampMillis = 0;
+}
+
+- (void)updateWithCheckinPlistContents:(NSDictionary *)checkinPlistContent {
+  for (NSString *key in checkinPlistContent) {
+    if ([kFIRInstanceIDDigestStringKey isEqualToString:key]) {
+      self.digest = [checkinPlistContent[key] copy];
+    } else if ([kFIRInstanceIDVersionInfoStringKey isEqualToString:key]) {
+      self.versionInfo = [checkinPlistContent[key] copy];
+    } else if ([kFIRInstanceIDLastCheckinTimeKey isEqualToString:key]) {
+      self.lastCheckinTimestampMillis = [checkinPlistContent[key] longLongValue];
+    } else if ([kFIRInstanceIDGServicesDictionaryKey isEqualToString:key]) {
+      self.gServicesData = [checkinPlistContent[key] mutableCopy];
+    } else if ([kFIRInstanceIDDeviceDataVersionKey isEqualToString:key]) {
+      self.deviceDataVersion = [checkinPlistContent[key] copy];
+    }
+    // Otherwise we have some keys we don't care about
+  }
+}
+
+- (NSString *)checkinKeychainContent {
+  if ([self.deviceID length] && [self.secretToken length]) {
+    return [NSString stringWithFormat:@"%@%@%@", self.deviceID,
+                                      kCheckinKeychainContentSeparatorString, self.secretToken];
+  } else {
+    return nil;
+  }
+}
+
++ (NSString *)checkinDeviceIDFromKeychainContent:(NSString *)keychainContent {
+  return [self checkinKeychainContent:keychainContent forIndex:0];
+}
+
++ (NSString *)checkinSecretFromKeychainContent:(NSString *)keychainContent {
+  return [self checkinKeychainContent:keychainContent forIndex:1];
+}
+
++ (NSString *)checkinKeychainContent:(NSString *)keychainContent forIndex:(int)index {
+  NSArray *keychainComponents =
+      [keychainContent componentsSeparatedByString:kCheckinKeychainContentSeparatorString];
+  if (index >= 0 && index < 2 && [keychainComponents count] == 2) {
+    return keychainComponents[index];
+  } else {
+    return nil;
+  }
+}
+
+@end

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDCheckinPreferences.h

@@ -0,0 +1,62 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+/**
+ *  The preferences InstanceID loads from checkin server. The deviceID and secret that checkin
+ *  provides is used to authenticate all future requests to the server. Besides the deviceID
+ *  and secret the other information that checkin provides is stored in a plist on the device.
+ *  The deviceID and secret are persisted in the device keychain.
+ */
+@interface FIRInstanceIDCheckinPreferences : NSObject
+
+/**
+ *  DeviceID and secretToken are the checkin auth credentials and are stored in the Keychain.
+ */
+@property(nonatomic, readonly, copy) NSString *deviceID;
+@property(nonatomic, readonly, copy) NSString *secretToken;
+
+/**
+ *  All the other checkin preferences other than deviceID and secret are stored in a plist.
+ */
+@property(nonatomic, readonly, copy) NSString *deviceDataVersion;
+@property(nonatomic, readonly, copy) NSString *digest;
+@property(nonatomic, readonly, copy) NSString *versionInfo;
+@property(nonatomic, readonly, assign) int64_t lastCheckinTimestampMillis;
+
+/**
+ *  The content retrieved from checkin server that should be persisted in a plist. This
+ *  doesn't contain the deviceID and secret which are stored in the Keychain since they
+ *  should be more private.
+ *
+ *  @return The checkin preferences that should be persisted in a plist.
+ */
+- (NSDictionary *)checkinPlistContents;
+
+/**
+ *  Return whether checkin info exists, valid or not.
+ */
+- (BOOL)hasCheckinInfo;
+
+/**
+ *  Verify if checkin preferences are valid or not.
+ *
+ *  @return YES if valid checkin preferences else NO.
+ */
+- (BOOL)hasValidCheckinInfo;
+
+@end

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDCheckinPreferences.m

@@ -0,0 +1,95 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FIRInstanceIDCheckinPreferences.h"
+
+#import <GoogleUtilities/GULUserDefaults.h>
+#import "FIRInstanceIDCheckinService.h"
+#import "FIRInstanceIDUtilities.h"
+
+const NSTimeInterval kFIRInstanceIDDefaultCheckinInterval = 7 * 24 * 60 * 60;  // 7 days.
+
+@interface FIRInstanceIDCheckinPreferences ()
+
+@property(nonatomic, readwrite, copy) NSString *deviceID;
+@property(nonatomic, readwrite, copy) NSString *secretToken;
+@property(nonatomic, readwrite, copy) NSString *digest;
+@property(nonatomic, readwrite, copy) NSString *versionInfo;
+@property(nonatomic, readwrite, copy) NSString *deviceDataVersion;
+
+@property(nonatomic, readwrite, strong) NSMutableDictionary *gServicesData;
+@property(nonatomic, readwrite, assign) int64_t lastCheckinTimestampMillis;
+
+// This flag indicates that we have already saved the above deviceID and secret
+// to our keychain and hence we don't need to save again. This is helpful since
+// on checkin refresh we can avoid writing to the Keychain which can sometimes
+// be very buggy. For info check this https://forums.developer.apple.com/thread/4743
+@property(nonatomic, readwrite, assign) BOOL hasPreCachedAuthCredentials;
+
+@end
+
+@implementation FIRInstanceIDCheckinPreferences
+
+- (NSDictionary *)checkinPlistContents {
+  NSMutableDictionary *checkinPlistContents = [NSMutableDictionary dictionary];
+  checkinPlistContents[kFIRInstanceIDDigestStringKey] = self.digest ?: @"";
+  checkinPlistContents[kFIRInstanceIDVersionInfoStringKey] = self.versionInfo ?: @"";
+  checkinPlistContents[kFIRInstanceIDDeviceDataVersionKey] = self.deviceDataVersion ?: @"";
+  checkinPlistContents[kFIRInstanceIDLastCheckinTimeKey] = @(self.lastCheckinTimestampMillis);
+  checkinPlistContents[kFIRInstanceIDGServicesDictionaryKey] =
+      [self.gServicesData count] ? self.gServicesData : @{};
+  return checkinPlistContents;
+}
+
+- (BOOL)hasCheckinInfo {
+  return (self.deviceID.length && self.secretToken.length);
+}
+
+- (BOOL)hasValidCheckinInfo {
+  int64_t currentTimestampInMillis = FIRInstanceIDCurrentTimestampInMilliseconds();
+  int64_t timeSinceLastCheckinInMillis = currentTimestampInMillis - self.lastCheckinTimestampMillis;
+
+  BOOL hasCheckinInfo = [self hasCheckinInfo];
+  NSString *lastLocale =
+      [[GULUserDefaults standardUserDefaults] stringForKey:kFIRInstanceIDUserDefaultsKeyLocale];
+  // If it's app's first time open and checkin is already fetched and no locale information is
+  // stored, then checkin info is valid. We should not checkin again because locale is considered
+  // "changed".
+  if (hasCheckinInfo && !lastLocale) {
+    NSString *currentLocale = FIRInstanceIDCurrentLocale();
+    [[GULUserDefaults standardUserDefaults] setObject:currentLocale
+                                               forKey:kFIRInstanceIDUserDefaultsKeyLocale];
+    return YES;
+  }
+
+  // If locale has changed, checkin info is no longer valid.
+  // Also update locale information if changed. (Only do it here not in token refresh)
+  if (FIRInstanceIDHasLocaleChanged()) {
+    NSString *currentLocale = FIRInstanceIDCurrentLocale();
+    [[GULUserDefaults standardUserDefaults] setObject:currentLocale
+                                               forKey:kFIRInstanceIDUserDefaultsKeyLocale];
+    return NO;
+  }
+
+  return (hasCheckinInfo &&
+          (timeSinceLastCheckinInMillis / 1000.0 < kFIRInstanceIDDefaultCheckinInterval));
+}
+
+- (void)setHasPreCachedAuthCredentials:(BOOL)hasPreCachedAuthCredentials {
+  _hasPreCachedAuthCredentials = hasPreCachedAuthCredentials;
+}
+
+@end

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDCheckinPreferences_Private.h

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FIRInstanceIDCheckinPreferences.h"
+
+/** Checkin refresh interval. **/
+FOUNDATION_EXPORT const NSTimeInterval kFIRInstanceIDDefaultCheckinInterval;
+
+@interface FIRInstanceIDCheckinPreferences ()
+
+- (BOOL)hasPreCachedAuthCredentials;
+- (void)setHasPreCachedAuthCredentials:(BOOL)hasPreCachedAuthCredentials;
+
+@end

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDCheckinService.h

@@ -0,0 +1,81 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+#import "FIRInstanceIDUtilities.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+// keys in Checkin preferences
+FOUNDATION_EXPORT NSString *const kFIRInstanceIDDeviceAuthIdKey;
+FOUNDATION_EXPORT NSString *const kFIRInstanceIDSecretTokenKey;
+FOUNDATION_EXPORT NSString *const kFIRInstanceIDDigestStringKey;
+FOUNDATION_EXPORT NSString *const kFIRInstanceIDLastCheckinTimeKey;
+FOUNDATION_EXPORT NSString *const kFIRInstanceIDVersionInfoStringKey;
+FOUNDATION_EXPORT NSString *const kFIRInstanceIDGServicesDictionaryKey;
+FOUNDATION_EXPORT NSString *const kFIRInstanceIDDeviceDataVersionKey;
+
+@class FIRInstanceIDCheckinPreferences;
+
+/**
+ *  @related FIRInstanceIDCheckinService
+ *
+ *  The completion handler invoked once the fetch from Checkin server finishes.
+ *  For successful fetches we returned checkin information by the checkin service
+ *  and `nil` error, else we return the appropriate error object as reported by the
+ *  Checkin Service.
+ *
+ *  @param checkinPreferences The checkin preferences as fetched from the server.
+ *  @param error              The error object which fetching GServices data.
+ */
+typedef void (^FIRInstanceIDDeviceCheckinCompletion)(
+    FIRInstanceIDCheckinPreferences *_Nullable checkinPreferences, NSError *_Nullable error);
+
+/**
+ *  Register the device with Checkin Service and get back the `authID`, `secret
+ *  token` etc. for the client. Checkin results are cached in the
+ *  `FIRInstanceIDCache` and periodically refreshed to prevent them from being stale.
+ *  Each client needs to register with checkin before registering with InstanceID.
+ */
+@interface FIRInstanceIDCheckinService : NSObject
+
+/**
+ *  Execute a device checkin request to obtain an deviceID, secret token,
+ *  gService data.
+ *
+ *  @param existingCheckin An existing checkin preference object, if available.
+ *  @param completion Completion hander called on success or failure of device checkin.
+ */
+- (void)checkinWithExistingCheckin:(nullable FIRInstanceIDCheckinPreferences *)existingCheckin
+                        completion:(FIRInstanceIDDeviceCheckinCompletion)completion;
+
+/**
+ *  This would stop any request that the service made to the checkin backend and also
+ *  release any callback handlers that it holds.
+ */
+- (void)stopFetching;
+
+/**
+ *  Set test block for mock testing network requests.
+ *
+ *  @param block The block to invoke as a mock response from the network.
+ */
++ (void)setCheckinTestBlock:(nullable FIRInstanceIDURLRequestTestBlock)block;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDCheckinService.m

@@ -0,0 +1,244 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FIRInstanceIDCheckinService.h"
+
+#import "FIRInstanceIDCheckinPreferences+Internal.h"
+#import "FIRInstanceIDCheckinPreferences_Private.h"
+#import "FIRInstanceIDDefines.h"
+#import "FIRInstanceIDLogger.h"
+#import "FIRInstanceIDStore.h"
+#import "FIRInstanceIDUtilities.h"
+#import "NSError+FIRInstanceID.h"
+
+static NSString *const kDeviceCheckinURL = @"https://device-provisioning.googleapis.com/checkin";
+
+// keys in Checkin preferences
+NSString *const kFIRInstanceIDDeviceAuthIdKey = @"GMSInstanceIDDeviceAuthIdKey";
+NSString *const kFIRInstanceIDSecretTokenKey = @"GMSInstanceIDSecretTokenKey";
+NSString *const kFIRInstanceIDDigestStringKey = @"GMSInstanceIDDigestKey";
+NSString *const kFIRInstanceIDLastCheckinTimeKey = @"GMSInstanceIDLastCheckinTimestampKey";
+NSString *const kFIRInstanceIDVersionInfoStringKey = @"GMSInstanceIDVersionInfo";
+NSString *const kFIRInstanceIDGServicesDictionaryKey = @"GMSInstanceIDGServicesData";
+NSString *const kFIRInstanceIDDeviceDataVersionKey = @"GMSInstanceIDDeviceDataVersion";
+
+static NSUInteger const kCheckinType = 2;  // DeviceType IOS in l/w/a/_checkin.proto
+static NSUInteger const kCheckinVersion = 2;
+static NSUInteger const kFragment = 0;
+
+static FIRInstanceIDURLRequestTestBlock testBlock;
+
+@interface FIRInstanceIDCheckinService ()
+
+@property(nonatomic, readwrite, strong) NSURLSession *session;
+
+@end
+
+@implementation FIRInstanceIDCheckinService
+;
+
+- (instancetype)init {
+  self = [super init];
+  if (self) {
+    // Create an URLSession once, even though checkin should happen about once a day
+    NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration];
+    config.timeoutIntervalForResource = 60.0f;  // 1 minute
+    config.allowsCellularAccess = YES;
+    _session = [NSURLSession sessionWithConfiguration:config];
+    _session.sessionDescription = @"com.google.iid-checkin";
+  }
+  return self;
+}
+
+- (void)dealloc {
+  testBlock = nil;
+  [self.session invalidateAndCancel];
+}
+
+- (void)checkinWithExistingCheckin:(FIRInstanceIDCheckinPreferences *)existingCheckin
+                        completion:(FIRInstanceIDDeviceCheckinCompletion)completion {
+  if (self.session == nil) {
+    FIRInstanceIDLoggerError(kFIRInstanceIDInvalidNetworkSession,
+                             @"Inconsistent state: NSURLSession has been invalidated");
+    NSError *error =
+        [NSError errorWithFIRInstanceIDErrorCode:kFIRInstanceIDErrorCodeRegistrarFailedToCheckIn];
+    if (completion) {
+      completion(nil, error);
+    }
+    return;
+  }
+
+  NSURL *url = [NSURL URLWithString:kDeviceCheckinURL];
+  NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
+  [request setValue:@"application/json" forHTTPHeaderField:@"content-type"];
+  NSDictionary *checkinParameters = [self checkinParametersWithExistingCheckin:existingCheckin];
+  NSData *checkinData = [NSJSONSerialization dataWithJSONObject:checkinParameters
+                                                        options:0
+                                                          error:nil];
+  request.HTTPMethod = @"POST";
+  request.HTTPBody = checkinData;
+
+  void (^handler)(NSData *, NSURLResponse *, NSError *) =
+      ^(NSData *data, NSURLResponse *response, NSError *error) {
+        if (error) {
+          FIRInstanceIDLoggerDebug(kFIRInstanceIDMessageCodeService000,
+                                   @"Device checkin HTTP fetch error. Error Code: %ld",
+                                   (long)error.code);
+          if (completion) {
+            completion(nil, error);
+          }
+          return;
+        }
+
+        NSError *serializationError;
+        NSDictionary *dataResponse = [NSJSONSerialization JSONObjectWithData:data
+                                                                     options:0
+                                                                       error:&serializationError];
+        if (serializationError) {
+          FIRInstanceIDLoggerDebug(kFIRInstanceIDMessageCodeService001,
+                                   @"Error serializing json object. Error Code: %ld",
+                                   _FIRInstanceID_L(serializationError.code));
+          if (completion) {
+            completion(nil, serializationError);
+          }
+          return;
+        }
+
+        NSString *deviceAuthID = [dataResponse[@"android_id"] stringValue];
+        NSString *secretToken = [dataResponse[@"security_token"] stringValue];
+        if ([deviceAuthID length] == 0) {
+          NSError *error =
+              [NSError errorWithFIRInstanceIDErrorCode:kFIRInstanceIDErrorCodeInvalidRequest];
+          if (completion) {
+            completion(nil, error);
+          }
+          return;
+        }
+
+        int64_t lastCheckinTimestampMillis = [dataResponse[@"time_msec"] longLongValue];
+        int64_t currentTimestampMillis = FIRInstanceIDCurrentTimestampInMilliseconds();
+        // Somehow the server clock gets out of sync with the device clock.
+        // Reset the last checkin timestamp in case this happens.
+        if (lastCheckinTimestampMillis > currentTimestampMillis) {
+          FIRInstanceIDLoggerDebug(
+              kFIRInstanceIDMessageCodeService002, @"Invalid last checkin timestamp %@ in future.",
+              [NSDate dateWithTimeIntervalSince1970:lastCheckinTimestampMillis / 1000.0]);
+          lastCheckinTimestampMillis = currentTimestampMillis;
+        }
+
+        NSString *deviceDataVersionInfo = dataResponse[@"device_data_version_info"] ?: @"";
+        NSString *digest = dataResponse[@"digest"] ?: @"";
+
+        FIRInstanceIDLoggerDebug(kFIRInstanceIDMessageCodeService003,
+                                 @"Checkin successful with authId: %@, "
+                                 @"digest: %@, "
+                                 @"lastCheckinTimestamp: %lld",
+                                 deviceAuthID, digest, lastCheckinTimestampMillis);
+
+        NSString *versionInfo = dataResponse[@"version_info"] ?: @"";
+        NSMutableDictionary *gservicesData = [NSMutableDictionary dictionary];
+
+        // Read gServices data.
+        NSArray *flatSettings = dataResponse[@"setting"];
+        for (NSDictionary *dict in flatSettings) {
+          if (dict[@"name"] && dict[@"value"]) {
+            gservicesData[dict[@"name"]] = dict[@"value"];
+          } else {
+            FIRInstanceIDLoggerDebug(kFIRInstanceIDInvalidSettingResponse,
+                                     @"Invalid setting in checkin response: (%@: %@)",
+                                     dict[@"name"], dict[@"value"]);
+          }
+        }
+
+        FIRInstanceIDCheckinPreferences *checkinPreferences =
+            [[FIRInstanceIDCheckinPreferences alloc] initWithDeviceID:deviceAuthID
+                                                          secretToken:secretToken];
+        NSDictionary *preferences = @{
+          kFIRInstanceIDDigestStringKey : digest,
+          kFIRInstanceIDVersionInfoStringKey : versionInfo,
+          kFIRInstanceIDLastCheckinTimeKey : @(lastCheckinTimestampMillis),
+          kFIRInstanceIDGServicesDictionaryKey : gservicesData,
+          kFIRInstanceIDDeviceDataVersionKey : deviceDataVersionInfo,
+        };
+        [checkinPreferences updateWithCheckinPlistContents:preferences];
+        if (completion) {
+          completion(checkinPreferences, nil);
+        }
+      };
+  // Test block
+  if (testBlock) {
+    FIRInstanceIDLoggerDebug(kFIRInstanceIDMessageCodeService005,
+                             @"Test block set, will not hit the server");
+    testBlock(request, handler);
+    return;
+  }
+
+  NSURLSessionDataTask *task = [self.session dataTaskWithRequest:request completionHandler:handler];
+  [task resume];
+}
+
+- (void)stopFetching {
+  [self.session invalidateAndCancel];
+  // The session cannot be reused after invalidation. Dispose it to prevent accident reusing.
+  self.session = nil;
+}
+
+#pragma mark - Private
+
+- (NSDictionary *)checkinParametersWithExistingCheckin:
+    (nullable FIRInstanceIDCheckinPreferences *)checkinPreferences {
+  NSString *deviceModel = FIRInstanceIDDeviceModel();
+  NSString *systemVersion = FIRInstanceIDOperatingSystemVersion();
+  NSString *osVersion = [NSString stringWithFormat:@"IOS_%@", systemVersion];
+
+  // Get locale from GCM if GCM exists else use system API.
+  NSString *locale = FIRInstanceIDCurrentLocale();
+
+  NSInteger userNumber = 0;        // Multi Profile may change this.
+  NSInteger userSerialNumber = 0;  // Multi Profile may change this
+
+  uint32_t loggingID = arc4random();
+  NSString *timeZone = [NSTimeZone localTimeZone].name;
+  int64_t lastCheckingTimestampMillis = checkinPreferences.lastCheckinTimestampMillis;
+
+  NSDictionary *checkinParameters = @{
+    @"checkin" : @{
+      @"iosbuild" : @{@"model" : deviceModel, @"os_version" : osVersion},
+      @"type" : @(kCheckinType),
+      @"user_number" : @(userNumber),
+      @"last_checkin_msec" : @(lastCheckingTimestampMillis),
+    },
+    @"fragment" : @(kFragment),
+    @"logging_id" : @(loggingID),
+    @"locale" : locale,
+    @"version" : @(kCheckinVersion),
+    @"digest" : checkinPreferences.digest ?: @"",
+    @"time_zone" : timeZone,
+    @"user_serial_number" : @(userSerialNumber),
+    @"id" : @([checkinPreferences.deviceID longLongValue]),
+    @"security_token" : @([checkinPreferences.secretToken longLongValue]),
+  };
+
+  FIRInstanceIDLoggerDebug(kFIRInstanceIDMessageCodeService006, @"Checkin parameters: %@",
+                           checkinParameters);
+  return checkinParameters;
+}
+
++ (void)setCheckinTestBlock:(FIRInstanceIDURLRequestTestBlock)block {
+  testBlock = [block copy];
+}
+
+@end

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDCheckinStore.h

@@ -0,0 +1,108 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+@class FIRInstanceIDAuthKeychain;
+@class FIRInstanceIDBackupExcludedPlist;
+@class FIRInstanceIDCheckinPreferences;
+
+// These values exposed for testing
+extern NSString *const kFIRInstanceIDCheckinKeychainService;
+extern NSString *const kFIRInstanceIDLegacyCheckinKeychainAccount;
+extern NSString *const kFIRInstanceIDLegacyCheckinKeychainService;
+
+/**
+ *  Checkin preferences backing store.
+ */
+@interface FIRInstanceIDCheckinStore : NSObject
+
+/**
+ *  Designated Initializer. Initialize a checkin store with the given backup excluded
+ *  plist filename.
+ *
+ *  @param checkinFilename                The backup excluded plist filename to persist checkin
+ *                                        preferences.
+ *
+ *  @param subDirectoryName               Sub-directory in standard directory where we write
+ *                                        InstanceID plist.
+ *
+ *  @return Store to persist checkin preferences.
+ */
+- (instancetype)initWithCheckinPlistFileName:(NSString *)checkinFilename
+                            subDirectoryName:(NSString *)subDirectoryName;
+
+/**
+ *  Initialize a checkin store with the given backup excluded  plist and keychain.
+ *
+ *  @param plist        The backup excluded plist to persist checkin preferences.
+ *  @param keychain     The keychain used to persist checkin auth preferences.
+ *
+ *  @return Store to persist checkin preferences.
+ */
+- (instancetype)initWithCheckinPlist:(FIRInstanceIDBackupExcludedPlist *)plist
+                            keychain:(FIRInstanceIDAuthKeychain *)keychain;
+
+/**
+ *  Checks whether the backup excluded checkin preferences are present on the disk or not.
+ *
+ *  @return YES if the backup excluded checkin plist exists on the disks else NO.
+ */
+- (BOOL)hasCheckinPlist;
+
+#pragma mark - Save
+
+/**
+ *  Save the checkin preferences to backing store.
+ *
+ *  @param preferences   Checkin preferences to save.
+ *  @param handler       The callback handler which is invoked when the operation is complete,
+ *                       with an error if there is any.
+ */
+- (void)saveCheckinPreferences:(FIRInstanceIDCheckinPreferences *)preferences
+                       handler:(void (^)(NSError *error))handler;
+
+#pragma mark - Delete
+
+/**
+ *  Remove the cached checkin preferences.
+ *
+ *  @param handler       The callback handler which is invoked when the operation is complete,
+ *                       with an error if there is any.
+ */
+- (void)removeCheckinPreferencesWithHandler:(void (^)(NSError *error))handler;
+
+#pragma mark - Get
+
+/**
+ *  Get the cached device secret. If we cannot access it for some reason we
+ *  return the appropriate error object.
+ *
+ *  @return The cached checkin preferences if present else nil.
+ */
+- (FIRInstanceIDCheckinPreferences *)cachedCheckinPreferences;
+
+/**
+ * Migrate the checkin item from old service/account to the new one.
+ * The new account is dynamic as it uses bundle ID.
+ * This is to ensure checkin is not shared across apps, but still the same
+ * if app has used GCM before.
+ * This call should only happen once.
+ *
+ */
+- (void)migrateCheckinItemIfNeeded;
+
+@end

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDCheckinStore.m

@@ -0,0 +1,238 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FIRInstanceIDCheckinStore.h"
+
+#import "FIRInstanceIDAuthKeyChain.h"
+#import "FIRInstanceIDBackupExcludedPlist.h"
+#import "FIRInstanceIDCheckinPreferences+Internal.h"
+#import "FIRInstanceIDCheckinPreferences_Private.h"
+#import "FIRInstanceIDCheckinService.h"
+#import "FIRInstanceIDLogger.h"
+#import "FIRInstanceIDUtilities.h"
+#import "FIRInstanceIDVersionUtilities.h"
+#import "NSError+FIRInstanceID.h"
+
+static NSString *const kFIRInstanceIDCheckinKeychainGeneric = @"com.google.iid";
+
+NSString *const kFIRInstanceIDCheckinKeychainService = @"com.google.iid.checkin";
+NSString *const kFIRInstanceIDLegacyCheckinKeychainAccount = @"com.google.iid.checkin-account";
+NSString *const kFIRInstanceIDLegacyCheckinKeychainService = @"com.google.iid.checkin-service";
+
+// Checkin plist used to have the deviceID and secret stored in them and that's why they
+// had 6 items in it. Since the deviceID and secret have been moved to the keychain
+// there would only be 4 items.
+static const NSInteger kOldCheckinPlistCount = 6;
+
+@interface FIRInstanceIDCheckinStore ()
+
+@property(nonatomic, readwrite, strong) FIRInstanceIDBackupExcludedPlist *plist;
+@property(nonatomic, readwrite, strong) FIRInstanceIDAuthKeychain *keychain;
+// Checkin will store items under
+// Keychain account: <app bundle id>,
+// Keychain service: |kFIRInstanceIDCheckinKeychainService|
+@property(nonatomic, readonly) NSString *bundleIdentifierForKeychainAccount;
+
+@end
+
+@implementation FIRInstanceIDCheckinStore
+
+- (instancetype)initWithCheckinPlistFileName:(NSString *)checkinFilename
+                            subDirectoryName:(NSString *)subDirectoryName {
+  FIRInstanceIDBackupExcludedPlist *plist =
+      [[FIRInstanceIDBackupExcludedPlist alloc] initWithFileName:checkinFilename
+                                                    subDirectory:subDirectoryName];
+
+  FIRInstanceIDAuthKeychain *keychain =
+      [[FIRInstanceIDAuthKeychain alloc] initWithIdentifier:kFIRInstanceIDCheckinKeychainGeneric];
+  return [self initWithCheckinPlist:plist keychain:keychain];
+}
+
+- (instancetype)initWithCheckinPlist:(FIRInstanceIDBackupExcludedPlist *)plist
+                            keychain:(FIRInstanceIDAuthKeychain *)keychain {
+  self = [super init];
+  if (self) {
+    _plist = plist;
+    _keychain = keychain;
+  }
+  return self;
+}
+
+- (BOOL)hasCheckinPlist {
+  return [self.plist doesFileExist];
+}
+
+- (NSString *)bundleIdentifierForKeychainAccount {
+  static NSString *bundleIdentifier;
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    bundleIdentifier = FIRInstanceIDAppIdentifier();
+  });
+  return bundleIdentifier;
+}
+
+- (void)saveCheckinPreferences:(FIRInstanceIDCheckinPreferences *)preferences
+                       handler:(void (^)(NSError *error))handler {
+  NSDictionary *checkinPlistContents = [preferences checkinPlistContents];
+  NSString *checkinKeychainContent = [preferences checkinKeychainContent];
+
+  if (![checkinKeychainContent length]) {
+    FIRInstanceIDLoggerDebug(kFIRInstanceIDMessageCodeCheckinStore000,
+                             @"Failed to get checkin keychain content from memory.");
+    if (handler) {
+      handler([NSError
+          errorWithFIRInstanceIDErrorCode:kFIRInstanceIDErrorCodeRegistrarFailedToCheckIn]);
+    }
+    return;
+  }
+  if (![checkinPlistContents count]) {
+    FIRInstanceIDLoggerDebug(kFIRInstanceIDMessageCodeCheckinStore001,
+                             @"Failed to get checkin plist contents from memory.");
+    if (handler) {
+      handler([NSError
+          errorWithFIRInstanceIDErrorCode:kFIRInstanceIDErrorCodeRegistrarFailedToCheckIn]);
+    }
+    return;
+  }
+
+  // Save all other checkin preferences in a plist
+  NSError *error;
+  if (![self.plist writeDictionary:checkinPlistContents error:&error]) {
+    FIRInstanceIDLoggerDebug(kFIRInstanceIDMessageCodeCheckinStore003,
+                             @"Failed to save checkin plist contents."
+                             @"Will delete auth credentials");
+    [self.keychain removeItemsMatchingService:kFIRInstanceIDCheckinKeychainService
+                                      account:self.bundleIdentifierForKeychainAccount
+                                      handler:nil];
+    if (handler) {
+      handler(error);
+    }
+    return;
+  }
+  FIRInstanceIDLoggerDebug(kFIRInstanceIDMessageCodeCheckinStoreCheckinPlistSaved,
+                           @"Checkin plist file is saved");
+
+  // Save the deviceID and secret in the Keychain
+  if (!preferences.hasPreCachedAuthCredentials) {
+    NSData *data = [checkinKeychainContent dataUsingEncoding:NSUTF8StringEncoding];
+    [self.keychain setData:data
+                forService:kFIRInstanceIDCheckinKeychainService
+             accessibility:nil
+                   account:self.bundleIdentifierForKeychainAccount
+                   handler:^(NSError *error) {
+                     if (error) {
+                       if (handler) {
+                         handler(error);
+                       }
+                       return;
+                     }
+                     if (handler) {
+                       handler(nil);
+                     }
+                   }];
+  } else {
+    handler(nil);
+  }
+}
+
+- (void)removeCheckinPreferencesWithHandler:(void (^)(NSError *error))handler {
+  // Delete the checkin preferences plist first to avoid delay.
+  NSError *deletePlistError;
+  if (![self.plist deleteFile:&deletePlistError]) {
+    handler(deletePlistError);
+    return;
+  }
+  FIRInstanceIDLoggerDebug(kFIRInstanceIDMessageCodeCheckinStoreCheckinPlistDeleted,
+                           @"Deleted checkin plist file.");
+  // Remove deviceID and secret from Keychain
+  [self.keychain
+      removeItemsMatchingService:kFIRInstanceIDCheckinKeychainService
+                         account:self.bundleIdentifierForKeychainAccount
+                         handler:^(NSError *error) {
+                           // Try to remove from old location as well because migration
+                           // is no longer needed. Consider this is either a fresh install
+                           // or an identity wipe.
+                           [self.keychain
+                               removeItemsMatchingService:kFIRInstanceIDLegacyCheckinKeychainService
+                                                  account:kFIRInstanceIDLegacyCheckinKeychainAccount
+                                                  handler:nil];
+                           handler(error);
+                         }];
+}
+
+- (FIRInstanceIDCheckinPreferences *)cachedCheckinPreferences {
+  // Query the keychain for deviceID and secret
+  NSData *item = [self.keychain dataForService:kFIRInstanceIDCheckinKeychainService
+                                       account:self.bundleIdentifierForKeychainAccount];
+
+  // Check info found in keychain
+  NSString *checkinKeychainContent = [[NSString alloc] initWithData:item
+                                                           encoding:NSUTF8StringEncoding];
+  FIRInstanceIDCheckinPreferences *checkinPreferences =
+      [FIRInstanceIDCheckinPreferences preferencesFromKeychainContents:checkinKeychainContent];
+
+  NSDictionary *checkinPlistContents = [self.plist contentAsDictionary];
+
+  NSString *plistDeviceAuthID = checkinPlistContents[kFIRInstanceIDDeviceAuthIdKey];
+  NSString *plistSecretToken = checkinPlistContents[kFIRInstanceIDSecretTokenKey];
+
+  // If deviceID and secret not found in the keychain verify that we don't have them in the
+  // checkin preferences plist.
+  if (![checkinPreferences.deviceID length] && ![checkinPreferences.secretToken length]) {
+    if ([plistDeviceAuthID length] && [plistSecretToken length]) {
+      // Couldn't find checkin credentials in keychain but found them in the plist.
+      checkinPreferences =
+          [[FIRInstanceIDCheckinPreferences alloc] initWithDeviceID:plistDeviceAuthID
+                                                        secretToken:plistSecretToken];
+    } else {
+      // Couldn't find checkin credentials in keychain nor plist
+      return nil;
+    }
+  } else if (kOldCheckinPlistCount == checkinPlistContents.count) {
+    // same check as above but just to be extra sure that we cover all upgrade cases properly.
+    // TODO(chliangGoogle): Remove this case, after verifying it's not needed
+    if ([plistDeviceAuthID length] && [plistSecretToken length]) {
+      checkinPreferences =
+          [[FIRInstanceIDCheckinPreferences alloc] initWithDeviceID:plistDeviceAuthID
+                                                        secretToken:plistSecretToken];
+    }
+  }
+
+  [checkinPreferences updateWithCheckinPlistContents:checkinPlistContents];
+  return checkinPreferences;
+}
+
+- (void)migrateCheckinItemIfNeeded {
+  // Check for checkin in the old location, using the legacy keys
+  // Query the keychain for deviceID and secret
+  NSData *dataInOldLocation =
+      [self.keychain dataForService:kFIRInstanceIDLegacyCheckinKeychainService
+                            account:kFIRInstanceIDLegacyCheckinKeychainAccount];
+  if (dataInOldLocation) {
+    // Save to new location
+    [self.keychain setData:dataInOldLocation
+                forService:kFIRInstanceIDCheckinKeychainService
+             accessibility:NULL
+                   account:self.bundleIdentifierForKeychainAccount
+                   handler:nil];
+    // Remove from old location
+    [self.keychain removeItemsMatchingService:kFIRInstanceIDLegacyCheckinKeychainService
+                                      account:kFIRInstanceIDLegacyCheckinKeychainAccount
+                                      handler:nil];
+  }
+}
+
+@end

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDCombinedHandler.h

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * A generic class to combine several handler blocks into a single block in a thread-safe manner
+ */
+@interface FIRInstanceIDCombinedHandler<ResultType> : NSObject
+
+- (void)addHandler:(void (^)(ResultType _Nullable result, NSError* _Nullable error))handler;
+- (void (^)(ResultType _Nullable result, NSError* _Nullable error))combinedHandler;
+
+@end
+
+NS_ASSUME_NONNULL_END

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDCombinedHandler.m

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FIRInstanceIDCombinedHandler.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+typedef void (^FIRInstanseIDHandler)(id _Nullable result, NSError *_Nullable error);
+
+@interface FIRInstanceIDCombinedHandler <ResultType>()
+@property(atomic, readonly, strong) NSMutableArray<FIRInstanseIDHandler> *handlers;
+@end
+
+NS_ASSUME_NONNULL_END
+
+@implementation FIRInstanceIDCombinedHandler
+
+- (instancetype)init {
+  self = [super init];
+  if (self) {
+    _handlers = [NSMutableArray array];
+  }
+  return self;
+}
+
+- (void)addHandler:(FIRInstanseIDHandler)handler {
+  if (!handler) {
+    return;
+  }
+
+  @synchronized(self) {
+    [self.handlers addObject:handler];
+  }
+}
+
+- (FIRInstanseIDHandler)combinedHandler {
+  FIRInstanseIDHandler combinedHandler = nil;
+
+  @synchronized(self) {
+    NSArray<FIRInstanseIDHandler> *handlers = [self.handlers copy];
+    combinedHandler = ^(id result, NSError *error) {
+      for (FIRInstanseIDHandler handler in handlers) {
+        handler(result, error);
+      }
+    };
+  }
+
+  return combinedHandler;
+}
+
+@end

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDConstants.h

@@ -0,0 +1,63 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+#pragma mark - Commands
+
+/**
+ *  Value included in a structured response or GCM message from IID, indicating
+ *  an identity reset.
+ */
+FOUNDATION_EXPORT NSString *const kFIRInstanceID_CMD_RST;
+
+#pragma mark - Notifications
+
+/// Notification used to deliver GCM messages for InstanceID.
+FOUNDATION_EXPORT NSString *const kFIRInstanceIDCheckinFetchedNotification;
+FOUNDATION_EXPORT NSString *const kFIRInstanceIDAPNSTokenNotification;
+FOUNDATION_EXPORT NSString *const kFIRInstanceIDDefaultGCMTokenNotification;
+FOUNDATION_EXPORT NSString *const kFIRInstanceIDDefaultGCMTokenFailNotification;
+
+FOUNDATION_EXPORT NSString *const kFIRInstanceIDIdentityInvalidatedNotification;
+
+#pragma mark - Miscellaneous
+
+/// The scope used to save the IID "*" scope token. This is used for saving the
+/// IID auth token that we receive from the server. This feature was never
+/// implemented on the server side.
+FOUNDATION_EXPORT NSString *const kFIRInstanceIDAllScopeIdentifier;
+/// The scope used to save the IID "*" scope token.
+FOUNDATION_EXPORT NSString *const kFIRInstanceIDDefaultTokenScope;
+
+/// Subdirectory in search path directory to store InstanceID preferences.
+FOUNDATION_EXPORT NSString *const kFIRInstanceIDSubDirectoryName;
+
+/// The key for APNS token in options dictionary.
+FOUNDATION_EXPORT NSString *const kFIRInstanceIDTokenOptionsAPNSKey;
+
+/// The key for APNS token environment type in options dictionary.
+FOUNDATION_EXPORT NSString *const kFIRInstanceIDTokenOptionsAPNSIsSandboxKey;
+
+/// The key for GMP AppID sent in registration requests.
+FOUNDATION_EXPORT NSString *const kFIRInstanceIDTokenOptionsFirebaseAppIDKey;
+
+/// The key to enable auto-register by swizzling AppDelegate's methods.
+FOUNDATION_EXPORT NSString *const kFIRInstanceIDAppDelegateProxyEnabledInfoPlistKey;
+
+/// Error code for missing entitlements in Keychain. iOS Keychain error
+/// https://forums.developer.apple.com/thread/4743
+FOUNDATION_EXPORT const int kFIRInstanceIDSecMissingEntitlementErrorCode;

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDConstants.m

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FIRInstanceIDConstants.h"
+
+// Commands
+NSString *const kFIRInstanceID_CMD_RST = @"RST";
+
+// NOTIFICATIONS
+NSString *const kFIRInstanceIDCheckinFetchedNotification = @"com.google.gcm.notif-checkin-fetched";
+NSString *const kFIRInstanceIDAPNSTokenNotification = @"com.firebase.iid.notif.apns-token";
+NSString *const kFIRInstanceIDDefaultGCMTokenNotification = @"com.firebase.iid.notif.fcm-token";
+NSString *const kFIRInstanceIDDefaultGCMTokenFailNotification =
+    @"com.firebase.iid.notif.fcm-token-fail";
+
+NSString *const kFIRInstanceIDIdentityInvalidatedNotification = @"com.google.iid.identity-invalid";
+
+// Miscellaneous
+NSString *const kFIRInstanceIDAllScopeIdentifier = @"iid-all";
+NSString *const kFIRInstanceIDDefaultTokenScope = @"*";
+NSString *const kFIRInstanceIDSubDirectoryName = @"Google/FirebaseInstanceID";
+
+// Registration Options
+NSString *const kFIRInstanceIDTokenOptionsAPNSKey = @"apns_token";
+NSString *const kFIRInstanceIDTokenOptionsAPNSIsSandboxKey = @"apns_sandbox";
+NSString *const kFIRInstanceIDTokenOptionsFirebaseAppIDKey = @"gmp_app_id";
+
+NSString *const kFIRInstanceIDAppDelegateProxyEnabledInfoPlistKey =
+    @"FirebaseAppDelegateProxyEnabled";
+
+// iOS Keychain error https://forums.developer.apple.com/thread/4743
+// An undocumented error code hence need to be redeclared.
+const int kFIRInstanceIDSecMissingEntitlementErrorCode = -34018;

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDDefines.h

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef FIRInstanceIDLib_FIRInstanceIDDefines_h
+#define FIRInstanceIDLib_FIRInstanceIDDefines_h
+
+#define _FIRInstanceID_VERBOSE_LOGGING 1
+
+// Verbose Logging
+#if (_FIRInstanceID_VERBOSE_LOGGING)
+#define FIRInstanceID_DEV_VERBOSE_LOG(...) NSLog(__VA_ARGS__)
+#else
+#define FIRInstanceID_DEV_VERBOSE_LOG(...) \
+  do {                                     \
+  } while (0)
+#endif  // VERBOSE_LOGGING
+
+// WEAKIFY & STRONGIFY
+// Helper macro.
+#define _FIRInstanceID_WEAKNAME(VAR) VAR##_weak_
+
+#define FIRInstanceID_WEAKIFY(VAR) __weak __typeof__(VAR) _FIRInstanceID_WEAKNAME(VAR) = (VAR);
+
+#define FIRInstanceID_STRONGIFY(VAR)                                                \
+  _Pragma("clang diagnostic push") _Pragma("clang diagnostic ignored \"-Wshadow\"") \
+      __strong __typeof__(VAR) VAR = _FIRInstanceID_WEAKNAME(VAR);                  \
+  _Pragma("clang diagnostic pop")
+
+// Type Conversions (used for NSInteger etc)
+#ifndef _FIRInstanceID_L
+#define _FIRInstanceID_L(v) (long)(v)
+#endif
+
+#endif

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDKeyPair.h

@@ -0,0 +1,78 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+@interface FIRInstanceIDKeyPair : NSObject
+
+- (instancetype)init __attribute__((
+    unavailable("Use -initWithPrivateKey:publicKey:publicKeyData:privateKeyData: instead.")));
+;
+
+/**
+ *  Initialize a new 2048 bit RSA keypair. This also stores the keypair in the Keychain
+ *  Preferences.
+ *
+ *  @param publicKey      The publicKey stored in Keychain.
+ *  @param privateKey     The privateKey stored in Keychain.
+ *  @param publicKeyData  The publicKey in NSData format.
+ *  @param privateKeyData The privateKey in NSData format.
+ *
+ *  @return A new KeyPair instance with the generated public and private key.
+ */
+- (instancetype)initWithPrivateKey:(SecKeyRef)privateKey
+                         publicKey:(SecKeyRef)publicKey
+                     publicKeyData:(NSData *)publicKeyData
+                    privateKeyData:(NSData *)privateKeyData NS_DESIGNATED_INITIALIZER;
+
+/**
+ *  The public key in the RSA 20148 bit generated KeyPair.
+ *
+ *  @return The 2048 bit RSA KeyPair's public key.
+ */
+@property(nonatomic, readonly, strong) NSData *publicKeyData;
+
+/**
+ *  The private key in the RSA 20148 bit generated KeyPair.
+ *
+ *  @return The 2048 bit RSA KeyPair's private key.
+ */
+@property(nonatomic, readonly, strong) NSData *privateKeyData;
+
+#pragma mark - Info
+
+/**
+ *  Checks if the private and public keyPair are valid or not.
+ *
+ *  @return YES if keypair is valid else NO.
+ */
+- (BOOL)isValid;
+
+/**
+ *  The public key in the RSA 2048 bit generated KeyPair.
+ *
+ *  @return The 2048 bit RSA KeyPair's public key.
+ */
+- (SecKeyRef)publicKey;
+
+/**
+ *  The private key in the RSA 2048 bit generated KeyPair.
+ *
+ *  @return The 2048 bit RSA KeyPair's private key.
+ */
+- (SecKeyRef)privateKey;
+
+@end

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDKeyPair.m

@@ -0,0 +1,73 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FIRInstanceIDKeyPair.h"
+
+#import <Security/Security.h>
+
+#import "FIRInstanceIDKeyPairUtilities.h"
+#import "FIRInstanceIDKeychain.h"
+#import "FIRInstanceIDLogger.h"
+#import "NSError+FIRInstanceID.h"
+
+@interface FIRInstanceIDKeyPair () {
+  SecKeyRef _privateKey;
+  SecKeyRef _publicKey;
+}
+
+@property(nonatomic, readwrite, strong) NSData *publicKeyData;
+@property(nonatomic, readwrite, strong) NSData *privateKeyData;
+@end
+
+@implementation FIRInstanceIDKeyPair
+- (instancetype)initWithPrivateKey:(SecKeyRef)privateKey
+                         publicKey:(SecKeyRef)publicKey
+                     publicKeyData:(NSData *)publicKeyData
+                    privateKeyData:(NSData *)privateKeyData {
+  self = [super init];
+  if (self) {
+    _privateKey = privateKey;
+    _publicKey = publicKey;
+    _publicKeyData = publicKeyData;
+    _privateKeyData = privateKeyData;
+  }
+  return self;
+}
+
+- (void)dealloc {
+  if (_privateKey) {
+    CFRelease(_privateKey);
+  }
+  if (_publicKey) {
+    CFRelease(_publicKey);
+  }
+}
+
+#pragma mark - Info
+
+- (BOOL)isValid {
+  return _privateKey != NULL && _publicKey != NULL;
+}
+
+- (SecKeyRef)publicKey {
+  return _publicKey;
+}
+
+- (SecKeyRef)privateKey {
+  return _privateKey;
+}
+
+@end

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDKeyPairStore.h

@@ -0,0 +1,85 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+@class FIRInstanceIDKeyPair;
+
+extern NSString *const kFIRInstanceIDKeyPairSubType;
+
+@class FIRInstanceIDKeyPairStore;
+
+@interface FIRInstanceIDKeyPairStore : NSObject
+
+/**
+ *  Invalidates the cached keypairs in the Keychain, if needed. The keypair metadata plist is
+ *  checked for existence. If the plist file does not exist, it is a signal of a new installation,
+ *  and therefore the key pairs are not valid.
+ *
+ *  Returns YES if keypair has been invalidated.
+ */
+- (BOOL)invalidateKeyPairsIfNeeded;
+
+/**
+ *  Delete the cached RSA keypair from Keychain with the given subtype.
+ *
+ *  @param subtype       The subtype used to cache the RSA keypair in Keychain.
+ *  @param handler       The callback handler which is invoked when the keypair deletion is
+ *                       complete, with an error if there is any.
+ */
+- (void)deleteSavedKeyPairWithSubtype:(NSString *)subtype handler:(void (^)(NSError *))handler;
+
+/**
+ *  Delete the plist that caches KeyPair generation timestamps.
+ *
+ *  @param error The error if any while deleting the plist else nil.
+ *
+ *  @return YES if the delete was successful else NO.
+ */
+- (BOOL)removeKeyPairCreationTimePlistWithError:(NSError **)error;
+
+/**
+ *  Loads a cached KeyPair if it exists in the Keychain else generate a new
+ *  one. If a keyPair already exists in memory this will just return that. This should
+ *  not be called from the main thread since it could potentially lead to creating a new
+ *  RSA-2048 bit keyPair which is an expensive operation.
+ *
+ *  @param error The error, if any, while accessing the Keychain.
+ *
+ *  @return A valid 2048 bit RSA key pair.
+ */
+- (FIRInstanceIDKeyPair *)loadKeyPairWithError:(NSError **)error;
+
+/**
+ *  Check if the Keychain has any cached keypairs or not.
+ *
+ *  @return YES if the Keychain has cached RSA KeyPairs else NO.
+ */
+- (BOOL)hasCachedKeyPairs;
+
+/**
+ *  Return an identifier for the app instance. The result is a short identifier that can
+ *  be used as a key when storing information about the app. This method will return the same
+ *  ID as long as the application identity remains active. If the identity has been revoked or
+ *  expired the method will generate and return a new identifier.
+ *
+ *  @param error The error if any while loading the RSA KeyPair.
+ *
+ * @return The identifier, as url safe string.
+ */
+- (NSString *)appIdentityWithError:(NSError *__autoreleasing *)error;
+
+@end

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDKeyPairStore.m

@@ -0,0 +1,525 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FIRInstanceIDKeyPairStore.h"
+
+#import "FIRInstanceIDBackupExcludedPlist.h"
+#import "FIRInstanceIDConstants.h"
+#import "FIRInstanceIDKeyPair.h"
+#import "FIRInstanceIDKeyPairUtilities.h"
+#import "FIRInstanceIDKeychain.h"
+#import "FIRInstanceIDLogger.h"
+#import "FIRInstanceIDUtilities.h"
+#import "NSError+FIRInstanceID.h"
+
+// NOTE: These values should be in sync with what InstanceID saves in as.
+static NSString *const kFIRInstanceIDKeyPairStoreFileName = @"com.google.iid-keypair";
+
+static NSString *const kFIRInstanceIDStoreKeyGenerationTime = @"cre";
+
+static NSString *const kFIRInstanceIDStoreKeyPrefix = @"com.google.iid-";
+static NSString *const kFIRInstanceIDStoreKeyPublic = @"|P|";
+static NSString *const kFIRInstanceIDStoreKeyPrivate = @"|K|";
+static NSString *const kFIRInstanceIDStoreKeySubtype = @"|S|";
+
+static NSString *const kFIRInstanceIDKeyPairPublicTagPrefix = @"com.google.iid.keypair.public-";
+static NSString *const kFIRInstanceIDKeyPairPrivateTagPrefix = @"com.google.iid.keypair.private-";
+
+static const int kMaxMissingEntitlementErrorCount = 3;
+
+NSString *const kFIRInstanceIDKeyPairSubType = @"";
+
+// Query the key with NSData format
+NSData *FIRInstanceIDKeyDataWithTag(NSString *tag) {
+  if (![tag length]) {
+    return NULL;
+  }
+  NSDictionary *queryKey = FIRInstanceIDKeyPairQuery(tag, YES, YES);
+  CFTypeRef result = [[FIRInstanceIDKeychain sharedInstance] itemWithQuery:queryKey];
+  if (!result) {
+    return NULL;
+  }
+  return (__bridge NSData *)result;
+}
+
+// Query the key given a tag
+SecKeyRef FIRInstanceIDCachedKeyRefWithTag(NSString *tag) {
+  if (!tag.length) {
+    return NULL;
+  }
+  NSDictionary *queryKey = FIRInstanceIDKeyPairQuery(tag, YES, NO);
+  CFTypeRef result = [[FIRInstanceIDKeychain sharedInstance] itemWithQuery:queryKey];
+  return (SecKeyRef)result;
+}
+
+// Check if keypair has been migrated from the legacy to the new version
+BOOL FIRInstanceIDHasMigratedKeyPair(NSString *legacyPublicKeyTag, NSString *newPublicKeyTag) {
+  NSData *oldPublicKeyData = FIRInstanceIDKeyDataWithTag(legacyPublicKeyTag);
+  NSData *newPublicKeyData = FIRInstanceIDKeyDataWithTag(newPublicKeyTag);
+  return [oldPublicKeyData isEqualToData:newPublicKeyData];
+}
+
+// The legacy value is hardcoded to be the same key. This is a potential problem in shared keychain
+// environments.
+NSString *FIRInstanceIDLegacyPublicTagWithSubtype(NSString *subtype) {
+  NSString *prefix = kFIRInstanceIDStoreKeyPrefix;
+  return [NSString stringWithFormat:@"%@%@%@", prefix, subtype, kFIRInstanceIDStoreKeyPublic];
+}
+
+// The legacy value is hardcoded to be the same key. This is a potential problem in shared keychain
+// environments.
+NSString *FIRInstanceIDLegacyPrivateTagWithSubtype(NSString *subtype) {
+  NSString *prefix = kFIRInstanceIDStoreKeyPrefix;
+  return [NSString stringWithFormat:@"%@%@%@", prefix, subtype, kFIRInstanceIDStoreKeyPrivate];
+}
+
+NSString *FIRInstanceIDPublicTagWithSubtype(NSString *subtype) {
+  static NSString *publicTag;
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    NSString *mainAppBundleID = FIRInstanceIDAppIdentifier();
+    publicTag =
+        [NSString stringWithFormat:@"%@%@", kFIRInstanceIDKeyPairPublicTagPrefix, mainAppBundleID];
+  });
+  return publicTag;
+}
+
+NSString *FIRInstanceIDPrivateTagWithSubtype(NSString *subtype) {
+  static NSString *privateTag;
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    NSString *mainAppBundleID = FIRInstanceIDAppIdentifier();
+    privateTag =
+        [NSString stringWithFormat:@"%@%@", kFIRInstanceIDKeyPairPrivateTagPrefix, mainAppBundleID];
+  });
+  return privateTag;
+}
+
+NSString *FIRInstanceIDCreationTimeKeyWithSubtype(NSString *subtype) {
+  return [NSString stringWithFormat:@"%@%@%@", subtype, kFIRInstanceIDStoreKeySubtype,
+                                    kFIRInstanceIDStoreKeyGenerationTime];
+}
+
+@interface FIRInstanceIDKeyPairStore ()
+
+@property(nonatomic, readwrite, strong) FIRInstanceIDBackupExcludedPlist *plist;
+@property(atomic, readwrite, strong) FIRInstanceIDKeyPair *keyPair;
+@property(nonatomic, readwrite, assign) NSInteger keychainEntitlementsErrorCount;
+
+@end
+
+@implementation FIRInstanceIDKeyPairStore
+
+- (instancetype)init {
+  self = [super init];
+  if (self) {
+    NSString *fileName = [[self class] keyStoreFileName];
+    _plist =
+        [[FIRInstanceIDBackupExcludedPlist alloc] initWithFileName:fileName
+                                                      subDirectory:kFIRInstanceIDSubDirectoryName];
+  }
+  return self;
+}
+
+- (BOOL)invalidateKeyPairsIfNeeded {
+  // Currently keypairs are always invalidated if self.plist is missing. This normally indicates
+  // a fresh install (or an uninstall/reinstall). In those situations the key pairs should be
+  // deleted.
+  // NOTE: Although this class refers to multiple key pairs, with different subtypes, in practice
+  // only a single subtype is currently supported. (b/64906549)
+  if (![self.plist doesFileExist]) {
+    // A fresh install, clear all the key pairs in the key chain. Do not perform migration as all
+    // key pairs are gone.
+    [self deleteSavedKeyPairWithSubtype:kFIRInstanceIDKeyPairSubType handler:nil];
+    return YES;
+  }
+  // Not a fresh install, perform migration at early state.
+  [self migrateKeyPairCacheIfNeededWithHandler:nil];
+  return NO;
+}
+
+- (BOOL)hasCachedKeyPairs {
+  NSError *error;
+  if ([self cachedKeyPairWithSubtype:kFIRInstanceIDKeyPairSubType error:&error] == nil) {
+    if (error) {
+      FIRInstanceIDLoggerDebug(kFIRInstanceIDMessageCodeKeyPairStore000,
+                               @"Failed to get the cached keyPair %@", error);
+    }
+    error = nil;
+    [self removeKeyPairCreationTimePlistWithError:&error];
+    if (error) {
+      FIRInstanceIDLoggerDebug(kFIRInstanceIDMessageCodeKeyPairStore001,
+                               @"Failed to remove keyPair creationTime plist %@", error);
+    }
+    return NO;
+  }
+  return YES;
+}
+
+- (NSString *)appIdentityWithError:(NSError *__autoreleasing *)error {
+  // Load the keyPair from Keychain (or generate a key pair, if this is the first run of the app).
+  FIRInstanceIDKeyPair *keyPair = [self loadKeyPairWithError:error];
+  if (!keyPair) {
+    FIRInstanceIDLoggerError(kFIRInstanceIDMessageCodeKeyPairStoreCouldNotLoadKeyPair,
+                             @"Keypair could not be loaded from Keychain. Error: %@", (*error));
+    return nil;
+  }
+
+  if (error) {
+    *error = nil;
+  }
+  NSString *appIdentity = FIRInstanceIDAppIdentity(keyPair);
+  if (!appIdentity.length) {
+    if (error) {
+      *error = [NSError errorWithFIRInstanceIDErrorCode:kFIRInstanceIDErrorCodeUnknown];
+    }
+  }
+  return appIdentity;
+}
+
+- (FIRInstanceIDKeyPair *)loadKeyPairWithError:(NSError **)error {
+  // In case we call this from different threads we don't want to generate or fetch the
+  // keyPair multiple times. Once we have a keyPair in the cache it would mostly be used
+  // from there.
+  @synchronized(self) {
+    if ([self.keyPair isValid]) {
+      return self.keyPair;
+    }
+
+    if (self.keychainEntitlementsErrorCount >= kMaxMissingEntitlementErrorCount) {
+      FIRInstanceIDLoggerDebug(kFIRInstanceIDMessageCodeKeyPairStore002,
+                               @"Keychain not accessible, Entitlements missing error (-34018). "
+                               @"Will not check token in cache.");
+      return nil;
+    }
+
+    if (!self.keyPair) {
+      self.keyPair = [self validCachedKeyPairWithSubtype:kFIRInstanceIDKeyPairSubType error:error];
+    }
+
+    if ((*error).code == kFIRInstanceIDSecMissingEntitlementErrorCode) {
+      self.keychainEntitlementsErrorCount++;
+    }
+
+    if (!self.keyPair) {
+      self.keyPair = [self generateAndSaveKeyWithSubtype:kFIRInstanceIDKeyPairSubType
+                                            creationTime:FIRInstanceIDCurrentTimestampInSeconds()
+                                                   error:error];
+    }
+  }
+  return self.keyPair;
+}
+
+// TODO(chliangGoogle: Remove subtype support, as it's not being used.
+- (FIRInstanceIDKeyPair *)generateAndSaveKeyWithSubtype:(NSString *)subtype
+                                           creationTime:(int64_t)creationTime
+                                                  error:(NSError **)error {
+  NSString *publicKeyTag = FIRInstanceIDPublicTagWithSubtype(subtype);
+  NSString *privateKeyTag = FIRInstanceIDPrivateTagWithSubtype(subtype);
+  FIRInstanceIDKeyPair *keyPair =
+      [[FIRInstanceIDKeychain sharedInstance] generateKeyPairWithPrivateTag:privateKeyTag
+                                                                  publicTag:publicKeyTag];
+
+  if (![keyPair isValid]) {
+    FIRInstanceIDLoggerError(kFIRInstanceIDMessageCodeKeyPairStore003,
+                             @"Unable to generate keypair.");
+    return nil;
+  }
+
+  NSString *creationTimeKey = FIRInstanceIDCreationTimeKeyWithSubtype(subtype);
+  NSDictionary *keyPairData = @{creationTimeKey : @(creationTime)};
+
+  if (error) {
+    *error = nil;
+  }
+  NSMutableDictionary *allKeyPairs = [[self.plist contentAsDictionary] mutableCopy];
+  if (allKeyPairs.count) {
+    [allKeyPairs addEntriesFromDictionary:keyPairData];
+  } else {
+    allKeyPairs = [keyPairData mutableCopy];
+  }
+  if (![self.plist writeDictionary:allKeyPairs error:error]) {
+    [FIRInstanceIDKeyPairStore deleteKeyPairWithPrivateTag:privateKeyTag
+                                                 publicTag:publicKeyTag
+                                                   handler:nil];
+    FIRInstanceIDLoggerError(kFIRInstanceIDMessageCodeKeyPairStore004,
+                             @"Failed to save keypair data to plist %@", error ? *error : @"");
+    return nil;
+  }
+
+  return keyPair;
+}
+
+- (FIRInstanceIDKeyPair *)validCachedKeyPairWithSubtype:(NSString *)subtype
+                                                  error:(NSError **)error {
+  // On a new install (or if the ID was deleted), the plist will be missing, which should trigger
+  // a reset of the key pairs in Keychain (if they exist).
+  NSDictionary *allKeyPairs = [self.plist contentAsDictionary];
+  NSString *creationTimeKey = FIRInstanceIDCreationTimeKeyWithSubtype(subtype);
+
+  if (allKeyPairs[creationTimeKey] > 0) {
+    return [self cachedKeyPairWithSubtype:subtype error:error];
+  } else {
+    // There is no need to reset keypair again here as FIRInstanceID init call is always
+    // going to be ahead of this call, which already trigger keypair reset if it's new install
+    FIRInstanceIDErrorCode code = kFIRInstanceIDErrorCodeInvalidKeyPairCreationTime;
+    if (error) {
+      *error = [NSError errorWithFIRInstanceIDErrorCode:code];
+    }
+    return nil;
+  }
+}
+
+- (FIRInstanceIDKeyPair *)cachedKeyPairWithSubtype:(NSString *)subtype
+                                             error:(NSError *__autoreleasing *)error {
+  // base64 encoded keys
+  NSString *publicKeyTag = FIRInstanceIDPublicTagWithSubtype(subtype);
+  NSString *privateKeyTag = FIRInstanceIDPrivateTagWithSubtype(subtype);
+  return [FIRInstanceIDKeyPairStore keyPairForPrivateKeyTag:privateKeyTag
+                                               publicKeyTag:publicKeyTag
+                                                      error:error];
+}
+
++ (FIRInstanceIDKeyPair *)keyPairForPrivateKeyTag:(NSString *)privateKeyTag
+                                     publicKeyTag:(NSString *)publicKeyTag
+                                            error:(NSError *__autoreleasing *)error {
+  if (![privateKeyTag length] || ![publicKeyTag length]) {
+    if (error) {
+      *error = [NSError errorWithFIRInstanceIDErrorCode:kFIRInstanceIDErrorCodeInvalidKeyPairTags];
+    }
+    return nil;
+  }
+
+  SecKeyRef privateKeyRef = FIRInstanceIDCachedKeyRefWithTag(privateKeyTag);
+  SecKeyRef publicKeyRef = FIRInstanceIDCachedKeyRefWithTag(publicKeyTag);
+
+  if (!privateKeyRef || !publicKeyRef) {
+    if (error) {
+      *error = [NSError errorWithFIRInstanceIDErrorCode:kFIRInstanceIDErrorCodeMissingKeyPair];
+    }
+    FIRInstanceIDLoggerDebug(kFIRInstanceIDMessageCodeKeyPair000,
+                             @"No keypair info is found with tag %@", privateKeyTag);
+    return nil;
+  }
+
+  NSData *publicKeyData = FIRInstanceIDKeyDataWithTag(publicKeyTag);
+  NSData *privateKeyData = FIRInstanceIDKeyDataWithTag(privateKeyTag);
+
+  FIRInstanceIDKeyPair *keyPair = [[FIRInstanceIDKeyPair alloc] initWithPrivateKey:privateKeyRef
+                                                                         publicKey:publicKeyRef
+                                                                     publicKeyData:publicKeyData
+                                                                    privateKeyData:privateKeyData];
+  return keyPair;
+}
+
+// Migrates from keypair saved under legacy keys (hardcoded value) to dynamic keys (stable, but
+// unique for the app's bundle id
+- (void)migrateKeyPairCacheIfNeededWithHandler:(void (^)(NSError *error))handler {
+  // Attempt to load keypair using legacy keys
+  NSString *legacyPublicKeyTag =
+      FIRInstanceIDLegacyPublicTagWithSubtype(kFIRInstanceIDKeyPairSubType);
+  NSString *legacyPrivateKeyTag =
+      FIRInstanceIDLegacyPrivateTagWithSubtype(kFIRInstanceIDKeyPairSubType);
+  NSError *error;
+  FIRInstanceIDKeyPair *keyPair =
+      [FIRInstanceIDKeyPairStore keyPairForPrivateKeyTag:legacyPrivateKeyTag
+                                            publicKeyTag:legacyPublicKeyTag
+                                                   error:&error];
+  if (![keyPair isValid]) {
+    FIRInstanceIDLoggerDebug(kFIRInstanceIDMessageCodeKeyPairNoLegacyKeyPair,
+                             @"There's no legacy keypair so no need to do migration.");
+    if (handler) {
+      handler(nil);
+    }
+    return;
+  }
+
+  // Check whether migration already done.
+  NSString *publicKeyTag = FIRInstanceIDPublicTagWithSubtype(kFIRInstanceIDKeyPairSubType);
+  if (FIRInstanceIDHasMigratedKeyPair(legacyPublicKeyTag, publicKeyTag)) {
+    if (handler) {
+      handler(nil);
+    }
+    return;
+  }
+
+  // Also cache locally since we are sure to use the migrated key pair.
+  self.keyPair = keyPair;
+
+  // Either new key pair doesn't exist or it's different than legacy key pair, start the migration.
+  __block NSError *updateKeyRefError;
+
+  NSString *privateKeyTag = FIRInstanceIDPrivateTagWithSubtype(kFIRInstanceIDKeyPairSubType);
+  [self updateKeyRef:keyPair.publicKey
+             withTag:publicKeyTag
+             handler:^(NSError *error) {
+               if (error) {
+                 FIRInstanceIDLoggerError(kFIRInstanceIDMessageCodeKeyPairMigrationError,
+                                          @"Unable to migrate key pair from legacy ones.");
+                 updateKeyRefError = error;
+               }
+             }];
+
+  [self updateKeyRef:keyPair.privateKey
+             withTag:privateKeyTag
+             handler:^(NSError *error) {
+               if (error) {
+                 FIRInstanceIDLoggerError(kFIRInstanceIDMessageCodeKeyPairMigrationError,
+                                          @"Unable to migrate key pair from legacy ones.");
+                 updateKeyRefError = error;
+               }
+
+               if (handler) {
+                 handler(updateKeyRefError);
+               }
+             }];
+}
+
+// Used for migrating from legacy tags to updated tags. The legacy keychain is not deleted for
+// backward compatibility.
+// TODO(chliangGoogle) Delete the legacy keychain when GCM is fully deprecated.
+- (void)updateKeyRef:(SecKeyRef)keyRef
+             withTag:(NSString *)tag
+             handler:(void (^)(NSError *error))handler {
+  NSData *updatedTagData = [tag dataUsingEncoding:NSUTF8StringEncoding];
+
+  __block NSError *keychainError;
+
+  // Always delete the old keychain before adding a new one to avoid conflicts.
+  NSDictionary *deleteQuery = @{
+    (__bridge id)kSecAttrApplicationTag : updatedTagData,
+    (__bridge id)kSecClass : (__bridge id)kSecClassKey,
+    (__bridge id)kSecAttrKeyType : (__bridge id)kSecAttrKeyTypeRSA,
+    (__bridge id)kSecReturnRef : @(YES),
+  };
+  [[FIRInstanceIDKeychain sharedInstance] removeItemWithQuery:deleteQuery
+                                                      handler:^(NSError *error) {
+                                                        if (error) {
+                                                          keychainError = error;
+                                                        }
+                                                      }];
+
+  NSDictionary *addQuery = @{
+    (__bridge id)kSecAttrApplicationTag : updatedTagData,
+    (__bridge id)kSecClass : (__bridge id)kSecClassKey,
+    (__bridge id)kSecValueRef : (__bridge id)keyRef,
+    (__bridge id)kSecAttrAccessible : (__bridge id)kSecAttrAccessibleAlwaysThisDeviceOnly,
+  };
+  [[FIRInstanceIDKeychain sharedInstance] addItemWithQuery:addQuery
+                                                   handler:^(NSError *addError) {
+                                                     if (addError) {
+                                                       keychainError = addError;
+                                                     }
+
+                                                     if (handler) {
+                                                       handler(keychainError);
+                                                     }
+                                                   }];
+}
+
+- (void)deleteSavedKeyPairWithSubtype:(NSString *)subtype
+                              handler:(void (^)(NSError *error))handler {
+  NSDictionary *allKeyPairs = [self.plist contentAsDictionary];
+
+  NSString *publicKeyTag = FIRInstanceIDPublicTagWithSubtype(subtype);
+  NSString *privateKeyTag = FIRInstanceIDPrivateTagWithSubtype(subtype);
+  NSString *creationTimeKey = FIRInstanceIDCreationTimeKeyWithSubtype(subtype);
+
+  // remove the creation time
+  if (allKeyPairs[creationTimeKey] > 0) {
+    NSMutableDictionary *newKeyPairs = [NSMutableDictionary dictionaryWithDictionary:allKeyPairs];
+    [newKeyPairs removeObjectForKey:creationTimeKey];
+
+    NSError *plistError;
+    if (![self.plist writeDictionary:newKeyPairs error:&plistError]) {
+      FIRInstanceIDLoggerError(kFIRInstanceIDMessageCodeKeyPairStore006,
+                               @"Unable to remove keypair creation time from plist %@", plistError);
+    }
+  }
+
+  self.keyPair = nil;
+
+  [FIRInstanceIDKeyPairStore
+      deleteKeyPairWithPrivateTag:privateKeyTag
+                        publicTag:publicKeyTag
+                          handler:^(NSError *error) {
+                            // Delete legacy key pairs from GCM/FCM If they exist. All key pairs
+                            // should be deleted when app is newly installed.
+                            NSString *legacyPublicKeyTag =
+                                FIRInstanceIDLegacyPublicTagWithSubtype(subtype);
+                            NSString *legacyPrivateKeyTag =
+                                FIRInstanceIDLegacyPrivateTagWithSubtype(subtype);
+                            [FIRInstanceIDKeyPairStore
+                                deleteKeyPairWithPrivateTag:legacyPrivateKeyTag
+                                                  publicTag:legacyPublicKeyTag
+                                                    handler:nil];
+                            if (error) {
+                              FIRInstanceIDLoggerError(kFIRInstanceIDMessageCodeKeyPairStore007,
+                                                       @"Unable to remove RSA keypair, error: %@",
+                                                       error);
+                              if (handler) {
+                                handler(error);
+                              }
+                            } else {
+                              if (handler) {
+                                handler(nil);
+                              }
+                            }
+                          }];
+}
+
++ (void)deleteKeyPairWithPrivateTag:(NSString *)privateTag
+                          publicTag:(NSString *)publicTag
+                            handler:(void (^)(NSError *))handler {
+  NSDictionary *queryPublicKey = FIRInstanceIDKeyPairQuery(publicTag, NO, NO);
+  NSDictionary *queryPrivateKey = FIRInstanceIDKeyPairQuery(privateTag, NO, NO);
+
+  __block NSError *keychainError;
+
+  // Always remove public key first because it is the key we generate IID.
+  [[FIRInstanceIDKeychain sharedInstance] removeItemWithQuery:queryPublicKey
+                                                      handler:^(NSError *error) {
+                                                        if (error) {
+                                                          keychainError = error;
+                                                        }
+                                                      }];
+
+  [[FIRInstanceIDKeychain sharedInstance] removeItemWithQuery:queryPrivateKey
+                                                      handler:^(NSError *error) {
+                                                        if (error) {
+                                                          keychainError = error;
+                                                        }
+
+                                                        if (handler) {
+                                                          handler(keychainError);
+                                                        }
+                                                      }];
+}
+
+- (BOOL)removeKeyPairCreationTimePlistWithError:(NSError *__autoreleasing *)error {
+  if (![self.plist deleteFile:error]) {
+    FIRInstanceIDLoggerError(kFIRInstanceIDMessageCodeKeyPairStore008,
+                             @"Unable to delete keypair creation times plist");
+    return NO;
+  }
+  return YES;
+}
+
++ (NSString *)keyStoreFileName {
+  return kFIRInstanceIDKeyPairStoreFileName;
+}
+
+@end

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDKeyPairUtilities.h

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+@class FIRInstanceIDKeyPair;
+
+/**
+ *  A web-safe base64 encoded string with no padding.
+ *
+ *  @param data The data to encode.
+ *
+ *  @return A web-safe base 64 encoded string with no padding.
+ */
+FOUNDATION_EXPORT NSString *FIRInstanceIDWebSafeBase64(NSData *data);
+
+FOUNDATION_EXPORT NSData *FIRInstanceIDSHA1(NSData *data);
+
+FOUNDATION_EXPORT NSDictionary *FIRInstanceIDKeyPairQuery(NSString *tag,
+                                                          BOOL addReturnAttr,
+                                                          BOOL returnData);
+
+FOUNDATION_EXPORT NSString *FIRInstanceIDAppIdentity(FIRInstanceIDKeyPair *keyPair);

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDKeyPairUtilities.m

@@ -0,0 +1,83 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FIRInstanceIDKeyPairUtilities.h"
+
+#import <CommonCrypto/CommonDigest.h>
+
+#import "FIRInstanceIDKeyPair.h"
+#import "FIRInstanceIDLogger.h"
+#import "FIRInstanceIDStringEncoding.h"
+
+NSString *FIRInstanceIDWebSafeBase64(NSData *data) {
+  // Websafe encoding with no padding.
+  FIRInstanceIDStringEncoding *encoding =
+      [FIRInstanceIDStringEncoding rfc4648Base64WebsafeStringEncoding];
+  [encoding setDoPad:NO];
+  return [encoding encode:data];
+}
+
+NSData *FIRInstanceIDSHA1(NSData *data) {
+  unsigned int outputLength = CC_SHA1_DIGEST_LENGTH;
+  unsigned char output[outputLength];
+  unsigned int length = (unsigned int)[data length];
+
+  CC_SHA1(data.bytes, length, output);
+  return [NSMutableData dataWithBytes:output length:outputLength];
+}
+
+NSDictionary *FIRInstanceIDKeyPairQuery(NSString *tag, BOOL addReturnAttr, BOOL returnData) {
+  NSMutableDictionary *queryKey = [NSMutableDictionary dictionary];
+  NSData *tagData = [tag dataUsingEncoding:NSUTF8StringEncoding];
+
+  queryKey[(__bridge id)kSecClass] = (__bridge id)kSecClassKey;
+  queryKey[(__bridge id)kSecAttrApplicationTag] = tagData;
+  queryKey[(__bridge id)kSecAttrKeyType] = (__bridge id)kSecAttrKeyTypeRSA;
+  if (addReturnAttr) {
+    if (returnData) {
+      queryKey[(__bridge id)kSecReturnData] = @(YES);
+    } else {
+      queryKey[(__bridge id)kSecReturnRef] = @(YES);
+    }
+  }
+  return queryKey;
+}
+
+NSString *FIRInstanceIDAppIdentity(FIRInstanceIDKeyPair *keyPair) {
+  // An Instance-ID is a 64 bit (8 byte) integer with a fixed 4-bit header of 0111 (=^ 0x7).
+  // The variable 60 bits are obtained by truncating the SHA1 of the app-instance's public key.
+  SecKeyRef publicKeyRef = [keyPair publicKey];
+  if (!publicKeyRef) {
+    FIRInstanceIDLoggerError(kFIRInstanceIDMessageCodeKeyPair002,
+                             @"Unable to create a valid asymmetric crypto key");
+    return nil;
+  }
+  NSData *publicKeyData = keyPair.publicKeyData;
+  NSData *publicKeySHA1 = FIRInstanceIDSHA1(publicKeyData);
+
+  const uint8_t *bytes = publicKeySHA1.bytes;
+  NSMutableData *identityData = [NSMutableData dataWithData:publicKeySHA1];
+
+  uint8_t b0 = bytes[0];
+  // Take the first byte and make the initial four 7 by initially making the initial 4 bits 0
+  // and then adding 0x70 to it.
+  b0 = 0x70 + (0xF & b0);
+  // failsafe should give you back b0 itself
+  b0 = (b0 & 0xFF);
+  [identityData replaceBytesInRange:NSMakeRange(0, 1) withBytes:&b0];
+  NSData *data = [identityData subdataWithRange:NSMakeRange(0, 8 * sizeof(Byte))];
+  return FIRInstanceIDWebSafeBase64(data);
+}

Pods/FirebaseInstanceID/Firebase/InstanceID/FIRInstanceIDKeychain.h

@@ -0,0 +1,76 @@
+/*
+ * Copyright 2019 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <Foundation/Foundation.h>
+
+/* The Keychain error domain */
+extern NSString *const kFIRInstanceIDKeychainErrorDomain;
+
+@class FIRInstanceIDKeyPair;
+
+/*
+ * Wrapping the keychain operations in a serialize queue. This is to avoid keychain operation
+ * blocking main queue.
+ */
+@interface FIRInstanceIDKeychain : NSObject
+
+/**
+ *  FIRInstanceIDKeychain.
+ *
+ *  @return A shared instance of FIRInstanceIDKeychain.
+ */
++ (instancetype)sharedInstance;
+
+/**
+ *  Get keychain items matching the given a query.
+ *
+ *  @param keychainQuery    The keychain query.
+ *
+ *  @return                 An CFTypeRef result matching the provided inputs.
+ */
+- (CFTypeRef)itemWithQuery:(NSDictionary *)keychainQuery;
+
+/**
+ *  Remove the cached items from the keychain matching the query.
+ *
+ *  @param keychainQuery    The keychain query.
+ *  @param handler          The callback handler which is invoked when the remove operation is
+ *                          complete, with an error if there is any.
+ */
+- (void)removeItemWithQuery:(NSDictionary *)keychainQuery handler:(void (^)(NSError *error))handler;
+
+/**
+ *  Add the item with a given query.
+ *
+ *  @param keychainQuery    The keychain query.
+ *  @param handler          The callback handler which is invoked when the add operation is
+ *                          complete, with an error if there is any.
+ */
+- (void)addItemWithQuery:(NSDictionary *)keychainQuery handler:(void (^)(NSError *))handler;
+
+#pragma mark - Keypair
+/**
+ *  Generate a public/private key pair given their tags.
+ *
+ *  @param privateTag        The private tag associated with the private key.
+ *  @param publicTag         The public tag associated with the public key.
+ *
+ *  @return                  A new FIRInstanceIDKeyPair object.
+ */
+- (FIRInstanceIDKeyPair *)generateKeyPairWithPrivateTag:(NSString *)privateTag
+                                              publicTag:(NSString *)publicTag;
+
+@end