@Override
  public boolean validate(final BlockHeader header, final BlockHeader parent) {
    return validateExtraData(header.getExtraData());
  }
Responsible for ensuring the extra data fields in the header contain the appropriate number of
bytes.
ethereum/core/src/main/java/org/hyperledger/besu/ethereum/mainnet/headervalidationrules/ExtraDataMaxLengthValidationRule.java