--- /dev/null
+/*
+ * 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 "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 kFIRLoggerCore;
+extern FIRLoggerService kFIRLoggerCrash;
+extern FIRLoggerService kFIRLoggerDatabase;
+extern FIRLoggerService kFIRLoggerDynamicLinks;
+extern FIRLoggerService kFIRLoggerFirestore;
+extern FIRLoggerService kFIRLoggerInstanceID;
+extern FIRLoggerService kFIRLoggerInvites;
+extern FIRLoggerService kFIRLoggerMLKit;
+extern FIRLoggerService kFIRLoggerMessaging;
+extern FIRLoggerService kFIRLoggerPerf;
+extern FIRLoggerService kFIRLoggerRemoteConfig;
+extern FIRLoggerService kFIRLoggerStorage;
+extern FIRLoggerService kFIRLoggerSwizzler;
+
+/**
+ * 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