always specify default when accessing bool preference

SignalServiceKit/src/Messages/OWSReadReceiptManager.m

@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2018 Open Whisper Systems. All rights reserved.
+//  Copyright (c) 2019 Open Whisper Systems. All rights reserved.
 //
 
 #import "OWSReadReceiptManager.h"
@@ -524,22 +524,9 @@ NSString *const OWSReadReceiptManagerAreReadReceiptsEnabled = @"areReadReceiptsE
 {
     // We don't need to worry about races around this cached value.
     if (!self.areReadReceiptsEnabledCached) {
-        // Default to NO.
         self.areReadReceiptsEnabledCached = @([self.dbConnection boolForKey:OWSReadReceiptManagerAreReadReceiptsEnabled
-                                                               inCollection:OWSReadReceiptManagerCollection]);
-    }
-
-    return [self.areReadReceiptsEnabledCached boolValue];
-}
-
-- (BOOL)areReadReceiptsEnabledWithTransaction:(YapDatabaseReadTransaction *)transaction
-{
-    if (!self.areReadReceiptsEnabledCached) {
-        [self.dbConnection readWithBlock:^(YapDatabaseReadTransaction *_Nonnull transaction) {
-            // Default to NO.
-            self.areReadReceiptsEnabledCached = [transaction objectForKey:OWSReadReceiptManagerAreReadReceiptsEnabled
-                                                             inCollection:OWSReadReceiptManagerCollection];
-        }];
+                                                               inCollection:OWSReadReceiptManagerCollection
+                                                               defaultValue:NO]);
     }
 
     return [self.areReadReceiptsEnabledCached boolValue];

SignalServiceKit/src/Network/OWSSignalService.m

@@ -104,7 +104,8 @@ NSString *const kNSNotificationName_IsCensorshipCircumventionActiveDidChange =
 {
     return
         [[OWSPrimaryStorage dbReadConnection] boolForKey:kOWSPrimaryStorage_isCensorshipCircumventionManuallyActivated
-                                            inCollection:kOWSPrimaryStorage_OWSSignalService];
+                                            inCollection:kOWSPrimaryStorage_OWSSignalService
+                                            defaultValue:NO];
 }
 
 - (void)setIsCensorshipCircumventionManuallyActivated:(BOOL)value
@@ -119,7 +120,8 @@ NSString *const kNSNotificationName_IsCensorshipCircumventionActiveDidChange =
 - (BOOL)isCensorshipCircumventionManuallyDisabled
 {
     return [[OWSPrimaryStorage dbReadConnection] boolForKey:kOWSPrimaryStorage_isCensorshipCircumventionManuallyDisabled
-                                               inCollection:kOWSPrimaryStorage_OWSSignalService];
+                                               inCollection:kOWSPrimaryStorage_OWSSignalService
+                                               defaultValue:NO];
 }
 
 - (void)setIsCensorshipCircumventionManuallyDisabled:(BOOL)value

SignalServiceKit/src/Storage/YapDatabaseConnection+OWS.h

@@ -1,5 +1,5 @@
 //
-//  Copyright (c) 2018 Open Whisper Systems. All rights reserved.
+//  Copyright (c) 2019 Open Whisper Systems. All rights reserved.
 //
 
 #import <YapDatabase/YapDatabaseConnection.h>
@@ -13,7 +13,6 @@ NS_ASSUME_NONNULL_BEGIN
 @interface YapDatabaseConnection (OWS)
 
 - (BOOL)hasObjectForKey:(NSString *)key inCollection:(NSString *)collection;
-- (BOOL)boolForKey:(NSString *)key inCollection:(NSString *)collection;
 - (BOOL)boolForKey:(NSString *)key inCollection:(NSString *)collection defaultValue:(BOOL)defaultValue;
 - (double)doubleForKey:(NSString *)key inCollection:(NSString *)collection defaultValue:(double)defaultValue;
 - (int)intForKey:(NSString *)key inCollection:(NSString *)collection;

SignalServiceKit/src/Storage/YapDatabaseConnection+OWS.m

@@ -51,11 +51,6 @@ NS_ASSUME_NONNULL_BEGIN
     return [self objectForKey:key inCollection:collection ofExpectedType:[NSString class]];
 }
 
-- (BOOL)boolForKey:(NSString *)key inCollection:(NSString *)collection
-{
-    return [self boolForKey:key inCollection:collection defaultValue:NO];
-}
-
 - (BOOL)boolForKey:(NSString *)key inCollection:(NSString *)collection defaultValue:(BOOL)defaultValue
 {
     NSNumber *_Nullable value = [self objectForKey:key inCollection:collection ofExpectedType:[NSNumber class]];

SignalServiceKit/src/Storage/YapDatabaseTransaction+OWS.h

@@ -12,7 +12,6 @@ NS_ASSUME_NONNULL_BEGIN
 
 @interface YapDatabaseReadTransaction (OWS)
 
-- (BOOL)boolForKey:(NSString *)key inCollection:(NSString *)collection;
 - (BOOL)boolForKey:(NSString *)key inCollection:(NSString *)collection defaultValue:(BOOL)defaultValue;
 - (int)intForKey:(NSString *)key inCollection:(NSString *)collection;
 - (nullable NSDate *)dateForKey:(NSString *)key inCollection:(NSString *)collection;

SignalServiceKit/src/Storage/YapDatabaseTransaction+OWS.m

@@ -36,14 +36,6 @@ NS_ASSUME_NONNULL_BEGIN
     return [self objectForKey:key inCollection:collection ofExpectedType:[NSString class]];
 }
 
-- (BOOL)boolForKey:(NSString *)key inCollection:(NSString *)collection
-{
-    OWSAssertDebug(key.length > 0);
-    OWSAssertDebug(collection.length > 0);
-
-    return [self boolForKey:key inCollection:collection defaultValue:NO];
-}
-
 - (BOOL)boolForKey:(NSString *)key inCollection:(NSString *)collection defaultValue:(BOOL)defaultValue
 {
     OWSAssertDebug(key.length > 0);