bitcoinj obtener bloque sin formato

He encontrado una solución temporal:

BlockStore blockStore = new MyCustomBlockStore(NETWORK_PARAMETERS);
blockStore.getChainHead();

blockChain = new BlockChain(NETWORK_PARAMETERS, blockStore);

PeerGroup peerGroup = new PeerGroup(NETWORK_PARAMETERS, blockChain);
peerGroup.setDownloadTxDependencies(1000);
peerGroup.setBloomFilteringEnabled(false);
peerGroup.addPeerDiscovery(new PeerDiscovery() {
    private final PeerDiscovery normalPeerDiscovery = new DnsDiscovery(NETWORK_PARAMETERS);

    @Override
    public InetSocketAddress[] getPeers(long services, long timeoutValue, TimeUnit timeoutUnit) throws PeerDiscoveryException {
        final List<InetSocketAddress> peers = new LinkedList<InetSocketAddress>();
            peers.addAll(Arrays.asList(normalPeerDiscovery.getPeers(services, timeoutValue, timeoutUnit)));
            InetSocketAddress[] isas = new InetSocketAddress[0];
            return peers.toArray(isas);
        }

    @Override
    public void shutdown() {
        normalPeerDiscovery.shutdown();
    }
});

peerGroup.startAsync();
peerGroup.startBlockChainDownload(new PeerDataEventListener() {
    public void onBlocksDownloaded(Peer peer, Block block, @Nullable FilteredBlock filteredBlock, int i) {

        List<Transaction> transactionsList = block.getTransactions();
        int transactions = transactionsList == null ? 0 : transactionsList.size();

        long height = peer.getBestHeight() - i;
        //If the block contains transactions, it is likely to be complete.
        Log.e(TAG, "Downloaded block " + height + " with " + transactions + " transactions");
        blockUpdate(block);
    }

    private void blockUpdate(Block fBlock) throws IOException {
        //TODO: Update blockchain database with the full block.
    }

    public void onChainDownloadStarted(Peer peer, int i) {
        Log.i(TAG, "Started to download chain on peer " + peer);
    }

    @Nullable
    public List<Message> getData(Peer peer, GetDataMessage getDataMessage) {
        //Log.i(TAG, "getData from " + peer);
        return null;
    }

    public Message onPreMessageReceived(Peer peer, Message message) {
        //Log.i(TAG, "onPreMessageReceived (" + message.getClass().getSimpleName() + ") from " + peer);
        return message;
    }
});

En mi caso creé un BlockStore que almacena los bloques en una base de datos SQLite3. Cuando obtengo el bloque completo, sobrescribo el registro del bloque con la información completa (transacciones, bloque sin procesar, etc...)

En su configuración predeterminada, bitcoinj solo descarga bloques filtrados y conserva solo aquellas transacciones que son relevantes para la(s) billetera(s) conectada(s).