Examples with UTXO org.bitcoinj.core.UTXO used on opensource projects

Example 1 with UTXO

use of org.bitcoinj.core.UTXO in project bitcoin-wallet by bitcoin-wallet.

the class SweepWalletFragment method requestWalletBalance.

private void requestWalletBalance() {
    ProgressDialogFragment.showProgress(fragmentManager, getString(R.string.sweep_wallet_fragment_request_wallet_balance_progress));
    final RequestWalletBalanceTask.ResultCallback callback = new RequestWalletBalanceTask.ResultCallback() {

        @Override
        public void onResult(final Set<UTXO> utxos) {
            ProgressDialogFragment.dismissProgress(fragmentManager);
            // Filter UTXOs we've already spent and sort the rest.
            final Set<Transaction> walletTxns = application.getWallet().getTransactions(false);
            final Set<UTXO> sortedUtxos = new TreeSet<>(UTXO_COMPARATOR);
            for (final UTXO utxo : utxos) if (!utxoSpentBy(walletTxns, utxo))
                sortedUtxos.add(utxo);
            // Fake transaction funding the wallet to sweep.
            final Map<Sha256Hash, Transaction> fakeTxns = new HashMap<>();
            for (final UTXO utxo : sortedUtxos) {
                Transaction fakeTx = fakeTxns.get(utxo.getHash());
                if (fakeTx == null) {
                    fakeTx = new FakeTransaction(Constants.NETWORK_PARAMETERS, utxo.getHash());
                    fakeTx.getConfidence().setConfidenceType(ConfidenceType.BUILDING);
                    fakeTxns.put(fakeTx.getHash(), fakeTx);
                }
                final TransactionOutput fakeOutput = new TransactionOutput(Constants.NETWORK_PARAMETERS, fakeTx, utxo.getValue(), utxo.getScript().getProgram());
                // Fill with output dummies as needed.
                while (fakeTx.getOutputs().size() < utxo.getIndex()) fakeTx.addOutput(new TransactionOutput(Constants.NETWORK_PARAMETERS, fakeTx, Coin.NEGATIVE_SATOSHI, new byte[] {}));
                // Add the actual output we will spend later.
                fakeTx.addOutput(fakeOutput);
            }
            walletToSweep.clearTransactions(0);
            for (final Transaction tx : fakeTxns.values()) walletToSweep.addWalletTransaction(new WalletTransaction(WalletTransaction.Pool.UNSPENT, tx));
            log.info("built wallet to sweep:\n{}", walletToSweep.toString(false, true, false, null));
            updateView();
        }

        private boolean utxoSpentBy(final Set<Transaction> transactions, final UTXO utxo) {
            for (final Transaction tx : transactions) {
                for (final TransactionInput input : tx.getInputs()) {
                    final TransactionOutPoint outpoint = input.getOutpoint();
                    if (outpoint.getHash().equals(utxo.getHash()) && outpoint.getIndex() == utxo.getIndex())
                        return true;
                }
            }
            return false;
        }

        @Override
        public void onFail(final int messageResId, final Object... messageArgs) {
            ProgressDialogFragment.dismissProgress(fragmentManager);
            final DialogBuilder dialog = DialogBuilder.warn(activity, R.string.sweep_wallet_fragment_request_wallet_balance_failed_title);
            dialog.setMessage(getString(messageResId, messageArgs));
            dialog.setPositiveButton(R.string.button_retry, new DialogInterface.OnClickListener() {

                @Override
                public void onClick(final DialogInterface dialog, final int which) {
                    requestWalletBalance();
                }
            });
            dialog.setNegativeButton(R.string.button_dismiss, null);
            dialog.show();
        }
    };
    final Address address = walletToSweep.getImportedKeys().iterator().next().toAddress(Constants.NETWORK_PARAMETERS);
    new RequestWalletBalanceTask(backgroundHandler, callback).requestWalletBalance(activity.getAssets(), address);
}

Example 2 with UTXO

use of org.bitcoinj.core.UTXO in project bitcoin-wallet by bitcoin-wallet.

the class RequestWalletBalanceTask method requestWalletBalance.

public void requestWalletBalance(final AssetManager assets, final Address address) {
    backgroundHandler.post(new Runnable() {

        @Override
        public void run() {
            org.bitcoinj.core.Context.propagate(Constants.CONTEXT);
            try {
                final List<ElectrumServer> servers = loadElectrumServers(assets.open(Constants.Files.ELECTRUM_SERVERS_FILENAME));
                final ElectrumServer server = servers.get(new Random().nextInt(servers.size()));
                log.info("trying to request wallet balance from {}: {}", server.socketAddress, address);
                final Socket socket;
                if (server.type == ElectrumServer.Type.TLS) {
                    final SocketFactory sf = sslTrustAllCertificates();
                    socket = sf.createSocket(server.socketAddress.getHostName(), server.socketAddress.getPort());
                    final SSLSession sslSession = ((SSLSocket) socket).getSession();
                    final Certificate certificate = sslSession.getPeerCertificates()[0];
                    final String certificateFingerprint = sslCertificateFingerprint(certificate);
                    if (server.certificateFingerprint == null) {
                        // signed by CA
                        if (!HttpsURLConnection.getDefaultHostnameVerifier().verify(server.socketAddress.getHostName(), sslSession))
                            throw new SSLHandshakeException("Expected " + server.socketAddress.getHostName() + ", got " + sslSession.getPeerPrincipal());
                    } else {
                        // self-signed
                        if (!certificateFingerprint.equals(server.certificateFingerprint))
                            throw new SSLHandshakeException("Expected " + server.certificateFingerprint + ", got " + certificateFingerprint);
                    }
                } else if (server.type == ElectrumServer.Type.TCP) {
                    socket = new Socket();
                    socket.connect(server.socketAddress, 5000);
                } else {
                    throw new IllegalStateException("Cannot handle: " + server.type);
                }
                final BufferedSink sink = Okio.buffer(Okio.sink(socket));
                sink.timeout().timeout(5000, TimeUnit.MILLISECONDS);
                final BufferedSource source = Okio.buffer(Okio.source(socket));
                source.timeout().timeout(5000, TimeUnit.MILLISECONDS);
                final Moshi moshi = new Moshi.Builder().build();
                final JsonAdapter<JsonRpcRequest> requestAdapter = moshi.adapter(JsonRpcRequest.class);
                final JsonRpcRequest request = new JsonRpcRequest("blockchain.address.listunspent", new String[] { address.toBase58() });
                requestAdapter.toJson(sink, request);
                sink.writeUtf8("\n").flush();
                final JsonAdapter<JsonRpcResponse> responseAdapter = moshi.adapter(JsonRpcResponse.class);
                final JsonRpcResponse response = responseAdapter.fromJson(source);
                if (response.id == request.id) {
                    if (response.result == null)
                        throw new JsonDataException("empty response");
                    final Set<UTXO> utxos = new HashSet<>();
                    for (final JsonRpcResponse.Utxo responseUtxo : response.result) {
                        final Sha256Hash utxoHash = Sha256Hash.wrap(responseUtxo.tx_hash);
                        final int utxoIndex = responseUtxo.tx_pos;
                        final Coin utxoValue = Coin.valueOf(responseUtxo.value);
                        final Script script = ScriptBuilder.createOutputScript(address);
                        final UTXO utxo = new UTXO(utxoHash, utxoIndex, utxoValue, responseUtxo.height, false, script);
                        utxos.add(utxo);
                    }
                    log.info("fetched {} unspent outputs from {}", response.result.length, server.socketAddress);
                    onResult(utxos);
                } else {
                    log.info("id mismatch response:{} vs request:{}", response.id, request.id);
                    onFail(R.string.error_parse, server.socketAddress.toString());
                }
            } catch (final JsonDataException x) {
                log.info("problem parsing json", x);
                onFail(R.string.error_parse, x.getMessage());
            } catch (final IOException x) {
                log.info("problem querying unspent outputs", x);
                onFail(R.string.error_io, x.getMessage());
            }
        }
    });
}