private static Bytes decodeValue(final String enrValue) {
      try {
        return Bytes.wrap(Base64.getUrlDecoder().decode(enrValue));
      } catch (IllegalArgumentException iae) {
        LOG.debug("enr value `{}` is not properly base64url encoded", enrValue);
        return null;
      }
    }
Create an ENRNode with the given attributes.

@param attrs the attributes of the node
@return created ENRNode
ethereum/p2p/src/main/java/org/hyperledger/besu/ethereum/p2p/discovery/dns/DNSEntry.java