Timer info messages *before* the message which changed the timer

// FREEBIE

SignalServiceKit/src/Messages/Interactions/OWSDisappearingConfigurationUpdateInfoMessage.m

@@ -49,6 +49,13 @@ NS_ASSUME_NONNULL_BEGIN
     return self;
 }
 
+- (BOOL)shouldUseReceiptDateForSorting
+{
+    // Use the timestamp, not the "received at" timestamp to sort,
+    // since we're creating these interactions after the fact and back-dating them.
+    return NO;
+}
+
 - (NSString *)description
 {
     if (self.createdByRemoteName) {

SignalServiceKit/src/Messages/OWSDisappearingMessagesJob.m

@@ -254,16 +254,17 @@ void AssertIsOnDisappearingMessagesQueue()
         NSString *contactName = [contactsManager displayNameForPhoneIdentifier:incomingMessage.messageAuthorId];
         
         // We want the info message to appear _before_ the message.
-        [[[OWSDisappearingConfigurationUpdateInfoMessage alloc] initWithTimestamp:message.timestamp - 1
+        [[[OWSDisappearingConfigurationUpdateInfoMessage alloc] initWithTimestamp:message.timestampForSorting - 1
                                                                            thread:message.thread
                                                                     configuration:disappearingMessagesConfiguration
-                                                              createdByRemoteName:contactName] saveWithTransaction:transaction];
+                                                              createdByRemoteName:contactName]
+            saveWithTransaction:transaction];
     } else {
         // We want the info message to appear _before_ the message.
-        [[[OWSDisappearingConfigurationUpdateInfoMessage alloc] initWithTimestamp:message.timestamp - 1
+        [[[OWSDisappearingConfigurationUpdateInfoMessage alloc] initWithTimestamp:message.timestampForSorting - 1
                                                                            thread:message.thread
                                                                     configuration:disappearingMessagesConfiguration]
-         saveWithTransaction:transaction];
+            saveWithTransaction:transaction];
     }
     
     backgroundTask = nil;