add code hash check to fast sync CodeNodeDataRequest to ensure code is not only present, but matches the expected hash (#3793)

Signed-off-by: garyschulte <garyschulte@gmail.com>

Co-authored-by: Sally MacFarlane <sally.macfarlane@consensys.net>

ethereum/eth/src/main/java/org/hyperledger/besu/ethereum/eth/sync/fastsync/worldstate/CodeNodeDataRequest.java

@@ -46,7 +46,9 @@ class CodeNodeDataRequest extends NodeDataRequest {
 
   @Override
   public Optional<Bytes> getExistingData(final WorldStateStorage worldStateStorage) {
-    return worldStateStorage.getCode(getHash(), accountHash.orElse(Hash.EMPTY));
+    return worldStateStorage
+        .getCode(getHash(), accountHash.orElse(Hash.EMPTY))
+        .filter(codeBytes -> Hash.hash(codeBytes).equals(getHash()));
   }
 
   public Optional<Hash> getAccountHash() {