private static List<TransactionAnnouncement> decodeForEth68(final RLPInput input) {
    input.enterList();

    final List<TransactionType> types = new ArrayList<>();
    final byte[] bytes = input.readBytes().toArray();
    for (final byte b : bytes) {
      types.add(b == 0 ? TransactionType.FRONTIER : TransactionType.of(b));
    }

    List<Long> sizes =
        input.readList(
            in -> {
              // for backward compatibility with previous Besu implementation be lenient and support
              // also unsigned int with leading zeros.
              // ToDo: this could be replaced with the simpler `RLPInput::readUnsignedIntScalar`
              // after some months it has been released, since most of the Besus
              // will be using the new implementation.
              final Bytes intBytes = in.readBytes();
              if (intBytes.size() > 4) {
                throw new RLPException(
                    "Expected max 4 bytes for unsigned int, but got " + intBytes.size() + " bytes");
              }
              return intBytes.toLong();
            });

    final List<Hash> hashes = input.readList(rlp -> Hash.wrap(rlp.readBytes32()));
    input.leaveList();
    if (!(types.size() == hashes.size() && hashes.size() == sizes.size())) {
      throw new RLPException("Hashes, sizes and types must have the same number of elements");
    }
    return TransactionAnnouncement.create(types, sizes, hashes);
  }
Decode the list of transactions in the NewPooledTransactionHashesMessage

@param input input used to decode the NewPooledTransactionHashesMessage after Eth/68
    <p>format: [[type_0: B_1, type_1: B_1, ...], [size_0: P, size_1: P, ...], ...]
@return the list of TransactionAnnouncement decoded from the message with size, type and hash
ethereum/eth/src/main/java/org/hyperledger/besu/ethereum/eth/encoding/TransactionAnnouncementDecoder.java