@Override
 public void onBlocksDownloaded(
     Peer peer, Block block, @Nullable FilteredBlock filteredBlock, int blocksLeft) {
   super.onBlocksDownloaded(peer, block, filteredBlock, blocksLeft);
   double pct = 100.0 - (100.0 * (blocksLeft / (double) originalBlocksLeft));
   if ((int) pct != lastPercent) {
     log.info("SnitcoinDownloadProgressTracker " + lastPercent + " " + blocksLeft);
     lastPercent = (int) pct;
   }
 }
  @Override
  public void onChainDownloadStarted(Peer peer, int blocksLeft) {
    super.onChainDownloadStarted(peer, blocksLeft);
    start = System.currentTimeMillis();

    Log.i(TAG, "onChainDownloadStarted blocksLeft=" + blocksLeft);

    if (originalBlocksLeft == -1) originalBlocksLeft = blocksLeft;
    /*if(blocksLeft==0)
    doneDownload();*/
  }
  @Override
  public void onBlocksDownloaded(
      Peer peer, Block block, FilteredBlock filteredBlock, int blocksLeft) {
    super.onBlocksDownloaded(peer, block, filteredBlock, blocksLeft);
    // Log.i(TAG, "onBlocksDownloaded");

    size += block.getMessageSize();

    double pct = 100.0 - (100.0 * (blocksLeft / (double) originalBlocksLeft));
    if ((int) pct != lastPercent) {
      lastPercent = (int) pct;
      walletObservable.setPercSync(lastPercent);
      walletObservable.notifyObservers();
    }
  }
 @Override
 public void onChainDownloadStarted(Peer peer, int blocksLeft) {
   super.onChainDownloadStarted(peer, blocksLeft);
   log.info("SnitcoinDownloadProgressTracker - Starting blockchain download " + blocksLeft);
 }
  public static void main(String[] args) throws Exception {
    NetworkParameters params = TestNet3Params.get();

    // Bitcoinj supports hierarchical deterministic wallets (or "HD Wallets"):
    // https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki
    // HD wallets allow you to restore your wallet simply from a root seed. This seed can be
    // represented using a short mnemonic sentence as described in BIP 39:
    // https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki

    // Here we restore our wallet from a seed with no passphrase. Also have a look at the
    // BackupToMnemonicSeed.java example that shows how to backup a wallet by creating a mnemonic
    // sentence.
    String seedCode =
        "yard impulse luxury drive today throw farm pepper survey wreck glass federal";
    String passphrase = "";
    Long creationtime = 1409478661L;

    DeterministicSeed seed = new DeterministicSeed(seedCode, null, passphrase, creationtime);

    // The wallet class provides a easy fromSeed() function that loads a new wallet from a given
    // seed.
    Wallet wallet = Wallet.fromSeed(params, seed);

    // Because we are importing an existing wallet which might already have transactions we must
    // re-download the blockchain to make the wallet picks up these transactions
    // You can find some information about this in the guides:
    // https://bitcoinj.github.io/working-with-the-wallet#setup
    // To do this we clear the transactions of the wallet and delete a possible existing blockchain
    // file before we download the blockchain again further down.
    System.out.println(wallet.toString());
    wallet.clearTransactions(0);
    File chainFile = new File("restore-from-seed.spvchain");
    if (chainFile.exists()) {
      chainFile.delete();
    }

    // Setting up the BlochChain, the BlocksStore and connecting to the network.
    SPVBlockStore chainStore = new SPVBlockStore(params, chainFile);
    BlockChain chain = new BlockChain(params, chainStore);
    PeerGroup peers = new PeerGroup(params, chain);
    peers.addPeerDiscovery(new DnsDiscovery(params));

    // Now we need to hook the wallet up to the blockchain and the peers. This registers event
    // listeners that notify our wallet about new transactions.
    chain.addWallet(wallet);
    peers.addWallet(wallet);

    DownloadProgressTracker bListener =
        new DownloadProgressTracker() {
          @Override
          public void doneDownload() {
            System.out.println("blockchain downloaded");
          }
        };

    // Now we re-download the blockchain. This replays the chain into the wallet. Once this is
    // completed our wallet should know of all its transactions and print the correct balance.
    peers.start();
    peers.startBlockChainDownload(bListener);

    bListener.await();

    // Print a debug message with the details about the wallet. The correct balance should now be
    // displayed.
    System.out.println(wallet.toString());

    // shutting down again
    peers.stop();
  }
 @Override
 protected void startDownload(int blocks) {
   super.startDownload(blocks);
   start = System.currentTimeMillis();
 }