/** * Synchronize a list of {@code Wallet} against the BlockChain. * * @param params the NetworkParameters to use * @param wallets the list of Wallet * @param chainFile the chain file to use * @param listener the listener to inform for status changes */ public static void syncBlockChain(UniquidNodeConfiguration configuration, final List<Wallet> wallets, final File chainFile, final DownloadProgressTracker listener, final NativePeerEventListener peerListener) { try { NetworkParameters params = configuration.getNetworkParameters(); BlockStore chainStore = new SPVBlockStore(params, chainFile); for (Wallet wallet : wallets) { if ((wallet.getLastBlockSeenHeight() < 1) && (openStream(params) != null)) { try { CheckpointManager.checkpoint(params, openStream(params), chainStore, configuration.getCreationTime()); StoredBlock head = chainStore.getChainHead(); LOGGER.info("Skipped to checkpoint " + head.getHeight() + " at " + Utils.dateTimeFormat(head.getHeader().getTimeSeconds() * 1000)); } catch (Throwable t) { LOGGER.warn("Problem using checkpoints", t); } break; } } BlockChain chain = new BlockChain(params, wallets, chainStore); final PeerGroup peerGroup = new PeerGroup(params, chain); peerGroup.setUserAgent("UNIQUID", "0.1"); peerGroup.setMaxPeersToDiscoverCount(3); peerGroup.setMaxConnections(2); if (params.getDnsSeeds() != null && params.getDnsSeeds().length > 0) { peerGroup.addPeerDiscovery(new DnsDiscovery(params)); } else if (params.getAddrSeeds() != null && params.getAddrSeeds().length > 0) { peerGroup.addPeerDiscovery(new SeedPeers(params.getAddrSeeds(), params)); } else { throw new Exception("Problem with Peers discovery!"); } LOGGER.info("BLOCKCHAIN Preparing to download blockchain..."); peerGroup.addConnectedEventListener(peerListener); peerGroup.addDisconnectedEventListener(peerListener); peerGroup.addDiscoveredEventListener(peerListener); peerGroup.start(); peerGroup.startBlockChainDownload(listener); listener.await(); peerGroup.stop(); chainStore.close(); LOGGER.info("BLOCKCHAIN downloaded."); } catch (Exception ex) { LOGGER.error("Exception catched ", ex); } }
public DownloadProgressTracker progressBarUpdater() { return model.getDownloadProgressTracker(); }
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(); }
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 peerGroup = new PeerGroup(params, chain); peerGroup.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); peerGroup.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. peerGroup.start(); peerGroup.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 peerGroup.stop(); }
/** * Synchronize a single of {@code Wallet} against the BlockChain. * * @param params the NetworkParameters to use * @param wallet the Wallet to synchronize * @param chainFile the chain file to use * @param listener the listener to inform for status changes */ public static void syncBlockChain(UniquidNodeConfiguration configuration, final Wallet wallet, final File chainFile, final DownloadProgressTracker listener, final NativePeerEventListener peerListener) { syncBlockChain(configuration, Arrays.asList(new Wallet[] { wallet }), chainFile, listener, peerListener); }
public DownloadProgressTracker getDownloadProgressTracker() { return syncProgressUpdater; }
