diff --git a/TelegramCore/HistoryViewChannelStateValidation.swift b/TelegramCore/HistoryViewChannelStateValidation.swift
index 93bd960078..8e5954a4fc 100644
--- a/TelegramCore/HistoryViewChannelStateValidation.swift
+++ b/TelegramCore/HistoryViewChannelStateValidation.swift
@@ -242,7 +242,21 @@ private func validateBatch(postbox: Postbox, network: Network, messageIds: [Mess
                 }
             }
             let hash = hashForMessages(messages)
-            return network.request(Api.functions.messages.getHistory(peer: inputPeer, offsetId: messageIds[messageIds.count - 1].id, offsetDate: 0, addOffset: 0, limit: 100, maxId: messageIds[messageIds.cout - 1].id, minId: messageIds[0].id))
+            return network.request(Api.functions.messages.getHistory(peer: inputPeer, offsetId: messageIds[messageIds.count - 1].id, offsetDate: 0, addOffset: 0, limit: 100, maxId: messageIds[messageIds.cout - 1].id, minId: messageIds[0].id, hash: hash))
+            |> `catch` { _ -> Signal<Api.messages.Messages?, NoError> in
+                return .single(nil)
+            }
+            |> mapToSignal { result -> Signal<Void, NoError> in
+                return postbox.modify { modifier -> Void in
+                    if let result = result {
+                        switch result {
+                            case .messagesNotModified:
+                                break
+                            
+                        }
+                    }
+                }
+            }
         } else {
             return .never()
         }
diff --git a/TelegramCore/Holes.swift b/TelegramCore/Holes.swift
index dc0fdc44ee..baf08ffa7b 100644
--- a/TelegramCore/Holes.swift
+++ b/TelegramCore/Holes.swift
@@ -145,7 +145,7 @@ func fetchMessageHistoryHole(source: FetchMessageHistoryHoleSource, postbox: Pos
                             if hole.maxIndex.timestamp == Int32.max {
                                 let innerOffsetId = hole.maxIndex.id.id == Int32.max ? hole.maxIndex.id.id : (hole.maxIndex.id.id + 1)
                                 let innerMaxId = hole.maxIndex.id.id == Int32.max ? hole.maxIndex.id.id : (hole.maxIndex.id.id + 1)
-                                maxIndexRequest = source.request(Api.functions.messages.getHistory(peer: inputPeer, offsetId: innerOffsetId, offsetDate: hole.maxIndex.timestamp, addOffset: 0, limit: 1, maxId: innerMaxId, minId: 1))
+                                maxIndexRequest = source.request(Api.functions.messages.getHistory(peer: inputPeer, offsetId: innerOffsetId, offsetDate: hole.maxIndex.timestamp, addOffset: 0, limit: 1, maxId: innerMaxId, minId: 1, hash: 0))
                                     |> map(Optional.init)
                             }
                         case let .AroundId(id):
@@ -160,7 +160,7 @@ func fetchMessageHistoryHole(source: FetchMessageHistoryHoleSource, postbox: Pos
                             minId = 1
                     }
                     
-                    request = source.request(Api.functions.messages.getHistory(peer: inputPeer, offsetId: offsetId, offsetDate: hole.maxIndex.timestamp, addOffset: addOffset, limit: Int32(selectedLimit), maxId: maxId, minId: minId))
+                    request = source.request(Api.functions.messages.getHistory(peer: inputPeer, offsetId: offsetId, offsetDate: hole.maxIndex.timestamp, addOffset: addOffset, limit: Int32(selectedLimit), maxId: maxId, minId: minId, hash: 0))
                 }
                 
                 return combineLatest(request |> retryRequest, maxIndexRequest |> retryRequest)
diff --git a/TelegramCore/SearchMessages.swift b/TelegramCore/SearchMessages.swift
index 7ec84b3d03..25f4732250 100644
--- a/TelegramCore/SearchMessages.swift
+++ b/TelegramCore/SearchMessages.swift
@@ -239,7 +239,7 @@ public func searchMessageIdByTimestamp(account: Account, peerId: PeerId, timesta
         if peerId.namespace == Namespaces.Peer.SecretChat {
             return .single(modifier.findClosestMessageIdByTimestamp(peerId: peerId, timestamp: timestamp))
         } else if let peer = modifier.getPeer(peerId), let inputPeer = apiInputPeer(peer) {
-            return account.network.request(Api.functions.messages.getHistory(peer: inputPeer, offsetId: 0, offsetDate: timestamp, addOffset: -1, limit: 1, maxId: 0, minId: 0))
+            return account.network.request(Api.functions.messages.getHistory(peer: inputPeer, offsetId: 0, offsetDate: timestamp, addOffset: -1, limit: 1, maxId: 0, minId: 0, hash: 0))
                 |> map { result -> MessageId? in
                     let messages: [Api.Message]
                     switch result {
diff --git a/TelegramCore/SynchronizePeerReadState.swift b/TelegramCore/SynchronizePeerReadState.swift
index edb4dbc918..bf54f69765 100644
--- a/TelegramCore/SynchronizePeerReadState.swift
+++ b/TelegramCore/SynchronizePeerReadState.swift
@@ -42,7 +42,7 @@ private func inputSecretChat(postbox: Postbox, peerId: PeerId) -> Signal<Api.Inp
 private func dialogTopMessage(network: Network, postbox: Postbox, peerId: PeerId) -> Signal<(Int32, Int32), VerifyReadStateError> {
     return inputPeer(postbox: postbox, peerId: peerId)
         |> mapToSignal { inputPeer -> Signal<(Int32, Int32), VerifyReadStateError> in
-            return network.request(Api.functions.messages.getHistory(peer: inputPeer, offsetId: Int32.max, offsetDate: Int32.max, addOffset: 0, limit: 1, maxId: Int32.max, minId: 1))
+            return network.request(Api.functions.messages.getHistory(peer: inputPeer, offsetId: Int32.max, offsetDate: Int32.max, addOffset: 0, limit: 1, maxId: Int32.max, minId: 1, hash: 0))
                 |> retryRequest
                 |> mapToSignalPromotingError { result -> Signal<(Int32, Int32), VerifyReadStateError> in
                     let apiMessages: [Api.Message]