fixed comments

src/main/java/com/limechain/network/protocol/grandpa/messages/consensus/GrandpaConsensusMessage.java

@@ -8,7 +8,7 @@
 
 @Data
 public class GrandpaConsensusMessage {
-    private long bestFinalizedBlock;
+    private BigInteger delayStartBlockNumber;
     private List<Authority> authorities;
     private BigInteger disabledAuthority;
     private long delay;

src/main/java/com/limechain/network/protocol/grandpa/messages/consensus/GrandpaConsensusMessageReader.java

@@ -7,6 +7,7 @@
 import io.emeraldpay.polkaj.scale.reader.ListReader;
 import io.emeraldpay.polkaj.scale.reader.UInt64Reader;
 
+import java.math.BigInteger;
 import java.util.List;
 
 public class GrandpaConsensusMessageReader implements ScaleReader<GrandpaConsensusMessage> {
@@ -24,10 +25,10 @@ public GrandpaConsensusMessage read(ScaleCodecReader reader) {
                 grandpaConsensusMessage.setDelay(delay);
             }
             case GRANDPA_FORCED_CHANGE -> {
-                long bestFinalizedBlock = reader.readUint32();
+                long delayStartBlockNumber = reader.readUint32();
                 List<Authority> authorities = reader.read(new ListReader<>(new AuthorityReader()));
                 long delay = reader.readUint32();
-                grandpaConsensusMessage.setBestFinalizedBlock(bestFinalizedBlock);
+                grandpaConsensusMessage.setDelayStartBlockNumber(BigInteger.valueOf(delayStartBlockNumber));
                 grandpaConsensusMessage.setAuthorities(authorities);
                 grandpaConsensusMessage.setDelay(delay);
             }

src/test/java/com/limechain/network/protocol/grandpa/messages/consensus/GrandpaConsensusMessageReaderTest.java

@@ -32,7 +32,7 @@ void testForcedChangeInput() {
         GrandpaConsensusMessage message = reader.read(new ScaleCodecReader(input));
         assertNotNull(message);
         assertEquals(GrandpaConsensusMessageFormat.GRANDPA_FORCED_CHANGE, message.getFormat());
-        assertEquals(3, message.getBestFinalizedBlock());
+        assertEquals(BigInteger.valueOf(3), message.getDelayStartBlockNumber());
         assertNotNull(message.getAuthorities());
 
         assertEquals(1, message.getAuthorities().size());