diff --git a/build.gradle b/build.gradle
index 096269325..60ef46d63 100644
--- a/build.gradle
+++ b/build.gradle
@@ -36,7 +36,7 @@ ext {
 }
 
 //String versionEra = "4.11.08-${git.head().abbreviatedId}"
-String versionEra = "6.3.02"
+String versionEra = "6.4.01"
 archivesBaseName = 'Erachain'
 group 'org.erachain'
 //version versionEra
diff --git a/src/main/java/org/erachain/controller/Controller.java b/src/main/java/org/erachain/controller/Controller.java
index 564d89ced..f76d4d273 100644
--- a/src/main/java/org/erachain/controller/Controller.java
+++ b/src/main/java/org/erachain/controller/Controller.java
@@ -101,8 +101,8 @@
  */
 public class Controller extends Observable {
 
-    public static String version = "6.3.02";
-    public static String buildTime = "2023-03-25 12:00:00 UTC";
+    public static String version = "6.4.01";
+    public static String buildTime = "2023-11-25 12:00:00 UTC";
 
     public static final char DECIMAL_SEPARATOR = '.';
     public static final char GROUPING_SEPARATOR = '`';
diff --git a/src/main/java/org/erachain/network/message/MessageFactory.java b/src/main/java/org/erachain/network/message/MessageFactory.java
index a45777034..16d5004b0 100644
--- a/src/main/java/org/erachain/network/message/MessageFactory.java
+++ b/src/main/java/org/erachain/network/message/MessageFactory.java
@@ -2,7 +2,6 @@
 
 import com.google.common.primitives.Ints;
 import org.erachain.core.block.Block;
-import org.erachain.core.crypto.Crypto;
 import org.erachain.core.transaction.Transaction;
 import org.erachain.lang.Lang;
 import org.erachain.network.Peer;
@@ -12,7 +11,6 @@
 
 import java.io.DataInputStream;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.List;
 
 public class MessageFactory {
@@ -90,20 +88,6 @@ public Message createTelegramGetAnswerMessage(ArrayList<String> addresses) {
         return new TelegramAnswerMessage(addresses);
     }
 
-    protected void checkSun(byte[] checksum, byte[] data) throws Exception {
-
-        byte[] digest = Crypto.getInstance().digest(data);
-
-        //TAKE FOR FIRST BYTES
-        digest = Arrays.copyOfRange(digest, 0, Message.CHECKSUM_LENGTH);
-
-        //CHECK IF CHECKSUM MATCHES
-        if (!Arrays.equals(checksum, digest)) {
-            throw new Exception(Lang.T("Invalid data checksum length="));
-        }
-
-    }
-
     public Message parse(Peer sender, DataInputStream inputStream) throws Exception {
         //READ MESSAGE TYPE
         byte[] typeBytes = new byte[Message.TYPE_LENGTH];