Track and persist 'is de-registered' state.

Signal/src/ViewControllers/HomeView/HomeViewController.m

@@ -25,6 +25,7 @@
 #import <SignalServiceKit/OWSBlockingManager.h>
 #import <SignalServiceKit/OWSMessageSender.h>
 #import <SignalServiceKit/OWSMessageUtils.h>
+#import <SignalServiceKit/TSAccountManager.h>
 #import <SignalServiceKit/TSOutgoingMessage.h>
 #import <SignalServiceKit/Threading.h>
 #import <YapDatabase/YapDatabase.h>
@@ -159,6 +160,10 @@ NSString *const kArchivedConversationsReuseIdentifier = @"kArchivedConversations
                                              selector:@selector(yapDatabaseModifiedExternally:)
                                                  name:YapDatabaseModifiedExternallyNotification
                                                object:nil];
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(deregistrationStateDidChange:)
+                                                 name:DeregistrationStateDidChangeNotification
+                                               object:nil];
 }
 
 - (void)dealloc
@@ -184,6 +189,13 @@ NSString *const kArchivedConversationsReuseIdentifier = @"kArchivedConversations
     [self reloadTableViewData];
 }
 
+- (void)deregistrationStateDidChange:(id)notification
+{
+    OWSAssertIsOnMainThread();
+
+    [self reloadTableViewData];
+}
+
 #pragma mark - View Life Cycle
 
 - (void)loadView

SignalServiceKit/src/Account/TSAccountManager.m

@@ -16,6 +16,7 @@
 #import "TSPreKeyManager.h"
 #import "TSVerifyCodeRequest.h"
 #import "YapDatabaseConnection+OWS.h"
+#import "YapDatabaseTransaction+OWS.h"
 #import <YapDatabase/YapDatabase.h>
 
 NS_ASSUME_NONNULL_BEGIN
@@ -541,27 +542,26 @@ NSString *const TSAccountManager_ServerSignalingKey = @"TSStorageServerSignaling
                                                            inCollection:TSAccountManager_UserAccountCollection
                                                            defaultValue:NO]);
         }
-    }
 
         OWSAssert(self.cachedIsDeregistered);
         return self.cachedIsDeregistered.boolValue;
     }
+}
 
 - (void)setIsDeregistered:(BOOL)isDeregistered
 {
     @synchronized(self) {
-        if (self.cachedIsDeregistered && self.cachedIsDeregistered.boolValue == isDeregistered))
-            {
+        if (self.cachedIsDeregistered && self.cachedIsDeregistered.boolValue == isDeregistered) {
             return;
         }
 
         DDLogWarn(@"%@ isDeregistered: %d", self.logTag, isDeregistered);
 
-        self.cachedIsDeregistered == @(isDeregistered);
+        self.cachedIsDeregistered = @(isDeregistered);
     }
 
     [self.dbConnection asyncReadWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction) {
-        [transaction setValue:@(isDeregistered)
+        [transaction setObject:@(isDeregistered)
                         forKey:TSAccountManager_IsDeregisteredKey
                   inCollection:TSAccountManager_UserAccountCollection];
     }];