Ignore any friend requests that were made before we restored our device.

Signal/src/Loki/Onboarding/SeedVC.swift

@@ -407,6 +407,9 @@ final class SeedVC : OnboardingBaseViewController, DeviceLinkingModalDelegate, O
                 self.setUserInteractionEnabled(true)
             }
         } else {
+            if (mode == .restore) {
+                OWSPrimaryStorage.shared().setRestorationTime(Date().timeIntervalSince1970)
+            }
             onboardingController.pushDisplayNameVC(from: self)
         }
     }

SignalServiceKit/src/Loki/Database/OWSPrimaryStorage+Loki.h

@@ -36,6 +36,11 @@ NS_ASSUME_NONNULL_BEGIN
 - (void)setIDForMessageWithServerID:(NSUInteger)serverID to:(NSString *)messageID in:(YapDatabaseReadWriteTransaction *)transaction;
 - (NSString *_Nullable)getIDForMessageWithServerID:(NSUInteger)serverID in:(YapDatabaseReadTransaction *)transaction;
 
+# pragma mark - Restoration
+
+- (void)setRestorationTime:(NSTimeInterval)time;
+- (NSTimeInterval)getRestorationTime;
+
 @end
 
 NS_ASSUME_NONNULL_END

SignalServiceKit/src/Loki/Database/OWSPrimaryStorage+Loki.m

@@ -175,4 +175,16 @@
     return [transaction objectForKey:key inCollection:LKMessageIDCollection];
 }
 
+# pragma mark - Restoration
+
+#define LKGeneralCollection @"Loki"
+
+- (void)setRestorationTime:(NSTimeInterval)time {
+    [self.dbReadWriteConnection setDouble:time forKey:@"restoration_time" inCollection:LKGeneralCollection];
+}
+
+- (NSTimeInterval)getRestorationTime {
+    return [self.dbReadConnection doubleForKey:@"restoration_time" inCollection:LKGeneralCollection defaultValue:0];
+}
+
 @end

SignalServiceKit/src/Messages/OWSMessageReceiver.m

@@ -10,7 +10,7 @@
 #import "OWSBackgroundTask.h"
 #import "OWSBatchMessageProcessor.h"
 #import "OWSMessageDecrypter.h"
-#import "OWSPrimaryStorage.h"
+#import "OWSPrimaryStorage+Loki.h"
 #import "OWSQueues.h"
 #import "OWSStorage.h"
 #import "OWSIdentityManager.h"
@@ -404,6 +404,16 @@ NSString *const OWSMessageDecryptJobFinderExtensionGroup = @"OWSMessageProcessin
         return;
     }
     
+    // Loki: Ignore any friend requests that we got before restoration
+    uint64_t restorationTime = [NSNumber numberWithDouble:[OWSPrimaryStorage.sharedManager getRestorationTime]].unsignedLongLongValue;
+    if (envelope.type == SSKProtoEnvelopeTypeFriendRequest && envelope.timestamp < restorationTime * 1000) {
+        OWSLogDebug(@"Ignoring friend request that was received before restoration.");
+        dispatch_async(self.serialQueue, ^{
+            completion(YES);
+        });
+        return;
+    }
+    
     // We use the original envelope for this check;
     // the decryption process might rewrite the envelope.
     BOOL wasReceivedByUD = [self wasReceivedByUD:envelope];