Add and honor the “CallKit Privacy” setting.

// FREEBIE

src/Storage/AxolotlStore/TSStorageManager+Calling.h

@@ -0,0 +1,20 @@
+//
+//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
+//
+
+#import "TSStorageManager.h"
+
+@interface TSStorageManager (Calling)
+
+// phoneNumber is an e164 formatted phone number.
+//
+// callKitId is expected to have CallKitCallManager.kAnonymousCallHandlePrefix.
+- (void)setPhoneNumber:(NSString *)phoneNumber forCallKitId:(NSString *)callKitId;
+
+// returns an e164 formatted phone number or nil if no
+// record can be found.
+//
+// callKitId is expected to have CallKitCallManager.kAnonymousCallHandlePrefix.
+- (NSString *)phoneNumberForCallKitId:(NSString *)callKitId;
+
+@end

src/Storage/AxolotlStore/TSStorageManager+Calling.m

@@ -0,0 +1,26 @@
+//
+//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
+//
+
+#import "TSStorageManager+Calling.h"
+
+#define TSStorageManagerCallKitIdToPhoneNumberCollection @"TSStorageManagerCallKitIdToPhoneNumberCollection"
+
+@implementation TSStorageManager (Calling)
+
+- (void)setPhoneNumber:(NSString *)phoneNumber forCallKitId:(NSString *)callKitId
+{
+    OWSAssert(phoneNumber.length > 0);
+    OWSAssert(callKitId.length > 0);
+
+    [self setObject:phoneNumber forKey:callKitId inCollection:TSStorageManagerCallKitIdToPhoneNumberCollection];
+}
+
+- (NSString *)phoneNumberForCallKitId:(NSString *)callKitId
+{
+    OWSAssert(callKitId.length > 0);
+
+    return [self objectForKey:callKitId inCollection:TSStorageManagerCallKitIdToPhoneNumberCollection];
+}
+
+@end