add missing nullability macros

Author: michaelkirk

AxolotlKit/Classes/Prekeys/PreKeyBundle.h

@@ -1,13 +1,11 @@
 //
-//  AxolotlKeyFetch.h
-//  AxolotlKit
-//
-//  Created by Frederic Jacobs on 21/07/14.
-//  Copyright (c) 2014 Frederic Jacobs. All rights reserved.
+//  Copyright (c) 2019 Open Whisper Systems. All rights reserved.
 //
 
 #import <Foundation/Foundation.h>
 
+NS_ASSUME_NONNULL_BEGIN
+
 @interface PreKeyBundle : NSObject <NSSecureCoding>
 
 @property (nonatomic, readonly) NSData   *identityKey;
@@ -29,3 +27,5 @@
                                     identityKey:(NSData *)identityKey;
 
 @end
+
+NS_ASSUME_NONNULL_END

AxolotlKit/Classes/Prekeys/PreKeyBundle.m

@@ -1,13 +1,10 @@
 //
-//  AxolotlKeyFetch.m
-//  AxolotlKit
-//
-//  Created by Frederic Jacobs on 21/07/14.
-//  Copyright (c) 2014 Frederic Jacobs. All rights reserved.
+//  Copyright (c) 2019 Open Whisper Systems. All rights reserved.
 //
 
 #import "PreKeyBundle.h"
 
+NS_ASSUME_NONNULL_BEGIN
 
 static NSString* const kCoderPKBIdentityKey           = @"kCoderPKBIdentityKey";
 static NSString* const kCoderPKBregistrationId        = @"kCoderPKBregistrationId";
@@ -62,7 +59,8 @@ - (nullable instancetype)initWithRegistrationId:(int)registrationId
     return self;
 }
 
-- (id)initWithCoder:(NSCoder *)aDecoder{
+- (nullable instancetype)initWithCoder:(NSCoder *)aDecoder
+{
     int registrationId            = [aDecoder decodeIntForKey:kCoderPKBregistrationId];
     int deviceId                  = [aDecoder decodeIntForKey:kCoderPKBdeviceId];
     int preKeyId                  = [aDecoder decodeIntForKey:kCoderPKBpreKeyId];
@@ -103,3 +101,5 @@ +(BOOL)supportsSecureCoding{
 }
 
 @end
+
+NS_ASSUME_NONNULL_END

AxolotlKit/Classes/Utility/NSData+keyVersionByte.h

@@ -1,9 +1,11 @@
 //
-//  Copyright (c) 2018 Open Whisper Systems. All rights reserved.
+//  Copyright (c) 2019 Open Whisper Systems. All rights reserved.
 //
 
 #import <Foundation/Foundation.h>
 
+NS_ASSUME_NONNULL_BEGIN
+
 @interface NSData (keyVersionByte)
 
 - (instancetype)prependKeyType;
@@ -12,3 +14,5 @@
 - (nullable instancetype)removeKeyTypeAndReturnError:(NSError **)outError;
 
 @end
+
+NS_ASSUME_NONNULL_END

AxolotlKit/Classes/Utility/NSData+keyVersionByte.m

@@ -1,11 +1,13 @@
 //
-//  Copyright (c) 2018 Open Whisper Systems. All rights reserved.
+//  Copyright (c) 2019 Open Whisper Systems. All rights reserved.
 //
 
 #import "NSData+keyVersionByte.h"
 #import "AxolotlExceptions.h"
 #import <SignalCoreKit/SCKExceptionWrapper.h>
 
+NS_ASSUME_NONNULL_BEGIN
+
 @implementation NSData (keyVersionByte)
 
 const Byte DJB_TYPE = 0x05;
@@ -46,3 +48,5 @@ - (instancetype)throws_removeKeyType
 }
 
 @end
+
+NS_ASSUME_NONNULL_END