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Improvements to the toy wallet example. Now shows received transactions in a list. Uses auto save. Testnet3. Uses the new event to refresh the wallet tx list. Lets you copy the address to the clipboard with one click. Smaller and simpler than before!

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This commit is contained in:
Mike Hearn 2012-10-04 00:05:34 +02:00
parent f2d9a6162d
commit 8a4c34edd0
1 changed files with 95 additions and 116 deletions
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211
examples/src/main/java/com/google/bitcoin/examples/toywallet/ToyWallet.java
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@ -18,27 +18,31 @@ package com.google.bitcoin.examples.toywallet;
import com.google.bitcoin.core.*;
import com.google.bitcoin.discovery.DnsDiscovery;
import com.google.bitcoin.discovery.IrcDiscovery;
import com.google.bitcoin.store.BoundedOverheadBlockStore;
import com.google.bitcoin.utils.BriefLogFormatter;
import com.google.common.collect.Lists;
import org.spongycastle.util.encoders.Hex;
import javax.swing.*;
import javax.swing.table.AbstractTableModel;
import java.awt.*;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.StringSelection;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.File;
import java.io.IOException;
import java.math.BigInteger;
import java.net.InetAddress;
import java.util.ArrayList;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
/**
* A GUI demo that lets you watch received transactions as they accumulate confidence.
*/
public class ToyWallet {
private final TxListModel txListModel = new TxListModel();
private JList txList;
private NetworkParameters params;
private Wallet wallet;
private PeerGroup peerGroup;
@ -46,16 +50,70 @@ public class ToyWallet {
private JLabel networkStats;
private File walletFile;
private JScrollPane txScrollPane;
private JTable txTable;
private TransactionTableModel txTableModel;
public static void main(String[] args) throws Exception {
BriefLogFormatter.init();
new ToyWallet(false, args);
new ToyWallet(true, args);
}
// Converts the contents of the wallet to a table for the GUI.
public class TransactionTableModel extends AbstractTableModel {
private List<Transaction> transactions = Lists.newLinkedList();
public int getRowCount() {
return transactions.size();
}
@Override
public String getColumnName(int i) {
switch (i) {
case 0: return "Confidence";
case 1: return "Description";
case 2: return "Value";
default: throw new RuntimeException("Unreachable");
}
}
public int getColumnCount() {
// Column 1: confidence
// Column 2: description
// Column 3: balance adjustment (+ve or -ve)
return 3;
}
public Object getValueAt(int row, int col) {
Transaction tx = transactions.get(row);
switch (col) {
case 0:
TransactionConfidence conf = tx.getConfidence();
return conf.toString();
case 1:
return String.format("TX with %d inputs and %d outputs",
tx.getInputs().size(), tx.getOutputs().size());
case 2:
try {
BigInteger val = tx.getValue(wallet);
return Utils.bitcoinValueToFriendlyString(val);
} catch (ScriptException e) {
throw new RuntimeException(e);
}
default:
throw new RuntimeException("Unreachable");
}
}
public void setTransactions(List<Transaction> txns) {
transactions = txns;
fireTableDataChanged();
}
}
public ToyWallet(boolean testnet, String[] args) throws Exception {
// Set up a Bitcoin connection + empty wallet. TODO: Simplify the setup for this use case.
if (testnet) {
params = NetworkParameters.testNet();
params = NetworkParameters.testNet3();
} else {
params = NetworkParameters.prodNet();
}
@ -88,7 +146,7 @@ public class ToyWallet {
} else {
key = new ECKey(); // Generate a fresh key.
}
wallet.keychain.add(key);
wallet.addKey(key);
wallet.saveToFile(walletFile);
freshWallet = true;
@ -96,6 +154,8 @@ public class ToyWallet {
System.out.println("Send to: " + wallet.keychain.get(0).toAddress(params));
System.out.println(wallet);
wallet.autosaveToFile(walletFile, 500, TimeUnit.MILLISECONDS, null);
File blockChainFile = new File("toy.blockchain");
if (!blockChainFile.exists() && !freshWallet) {
// No block chain, but we had a wallet. So empty out the transactions in the wallet so when we rescan
@ -107,13 +167,11 @@ public class ToyWallet {
peerGroup = new PeerGroup(params, chain);
peerGroup.setUserAgent("ToyWallet", "1.0");
if (testnet) {
peerGroup.addAddress(new PeerAddress(InetAddress.getByName("plan99.net"), 18333));
peerGroup.addAddress(new PeerAddress(InetAddress.getByName("localhost"), 18333));
peerGroup.addPeerDiscovery(new IrcDiscovery("#bitcoinTEST3"));
} else {
peerGroup.addPeerDiscovery(new DnsDiscovery(params));
}
peerGroup.addWallet(wallet);
peerGroup.setFastCatchupTimeSecs(wallet.getEarliestKeyCreationTime());
// Watch for peers coming and going so we can update the UI.
peerGroup.addEventListener(new AbstractPeerEventListener() {
@ -133,31 +191,19 @@ public class ToyWallet {
public void onBlocksDownloaded(Peer peer, Block block, int blocksLeft) {
super.onBlocksDownloaded(peer, block, blocksLeft);
triggerNetworkStatsUpdate();
handleNewBlock();
}
});
wallet.addEventListener(new AbstractWalletEventListener() {
@Override
public void onCoinsReceived(Wallet wallet, Transaction tx, BigInteger prevBalance, BigInteger newBalance) {
super.onCoinsReceived(wallet, tx, prevBalance, newBalance);
handleNewTransaction(tx);
}
@Override
public void onCoinsSent(Wallet wallet, Transaction tx, BigInteger prevBalance, BigInteger newBalance) {
super.onCoinsSent(wallet, tx, prevBalance, newBalance);
handleNewTransaction(tx);
}
@Override
public void onChange() {
try {
System.out.println("Wallet changed");
wallet.saveToFile(walletFile);
} catch (IOException e) {
throw new RuntimeException(e);
}
public void onWalletChanged(Wallet wallet) {
// This is running in some arbitrary bitcoinj provided thread with the wallet locked.
final List<Transaction> txns = wallet.getTransactionsByTime();
SwingUtilities.invokeLater(new Runnable() {
public void run() {
txTableModel.setTransactions(txns);
}
});
}
});
@ -168,16 +214,7 @@ public class ToyWallet {
window.pack();
window.setSize(640, 480);
// Put the transactions stored in the wallet, into the GUI.
final Set<Transaction> walletTransactions = wallet.getTransactions(true, true);
SwingUtilities.invokeAndWait(new Runnable() {
public void run() {
for (final Transaction tx : walletTransactions) {
txListModel.monitorTx(tx);
}
}
});
txTableModel.setTransactions(wallet.getTransactionsByTime());
// Go!
window.setVisible(true);
@ -185,100 +222,42 @@ public class ToyWallet {
peerGroup.downloadBlockChain();
}
private void handleNewBlock() {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
txListModel.newBlock();
}
});
}
private void handleNewTransaction(final Transaction t) {
// Running on a peer thread, switch to Swing thread before adding and updating the UI.
SwingUtilities.invokeLater(new Runnable() {
public void run() {
txListModel.monitorTx(t);
}
});
}
private void triggerNetworkStatsUpdate() {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
int numPeers = peerGroup.numConnectedPeers();
StoredBlock chainHead = chain.getChainHead();
String date = chainHead.getHeader().getTime().toString();
String plural = numPeers > 1 ? "peers" : "peer";
String status = String.format("%d %s connected. %d blocks: %s",
numPeers, plural, chainHead.getHeight(), date);
String status = String.format("%d peer(s) connected. %d blocks: %s",
numPeers, chainHead.getHeight(), date);
networkStats.setText(status);
}
});
}
private void setupWindow(JFrame window) {
final Address address = wallet.keychain.get(0).toAddress(params);
JLabel instructions = new JLabel(
"<html>Broadcast transactions appear below. Watch them gain confidence.<br>" +
"Send coins to: <b>" + wallet.keychain.get(0).toAddress(params) + "</b>");
"Send coins to: <b>" + address + "</b> <i>(click to place on clipboard)</i>");
// Just make the label clickable so it puts the address in the clipboard.
instructions.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent mouseEvent) {
Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
StringSelection sel = new StringSelection(address.toString());
clipboard.setContents(sel, sel);
}
});
window.getContentPane().add(instructions, BorderLayout.NORTH);
txTableModel = new TransactionTableModel();
txTableModel.transactions = new LinkedList<Transaction>();
txTable = new JTable(txTableModel);
// The list of transactions.
txList = new JList(txListModel);
txList.setCellRenderer(new TxListLabel());
txList.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
txList.setLayoutOrientation(JList.VERTICAL);
txScrollPane = new JScrollPane(txList);
txScrollPane = new JScrollPane(txTable);
window.getContentPane().add(txScrollPane, BorderLayout.CENTER);
networkStats = new JLabel("Connecting to the Bitcoin network ...");
window.getContentPane().add(networkStats, BorderLayout.SOUTH);
}
// Object that manages the contents of the list view.
private class TxListModel extends AbstractListModel {
private List<Transaction> transactions = new ArrayList<Transaction>();
public void monitorTx(Transaction tx) {
assert SwingUtilities.isEventDispatchThread();
transactions.add(tx);
// Set up a tx confidence change event listener, so we know when to update the list.
tx.getConfidence().addEventListener(new TransactionConfidence.Listener() {
public void onConfidenceChanged(Transaction tx) {
// Note that this does NOT get called for every block that is received, just when we transition
// between confidence states.
int txIndex = transactions.indexOf(tx);
fireContentsChanged(this, txIndex, txIndex);
}
});
fireIntervalAdded(this, transactions.size() - 1, transactions.size() - 1);
}
public int getSize() {
return transactions.size();
}
public Object getElementAt(int i) {
Transaction tx = transactions.get(i);
return tx.toString() + "\n" + tx.getConfidence().toString();
}
public void newBlock() {
fireContentsChanged(this, 0, getSize() - 1);
}
}
private class TxListLabel extends JLabel implements ListCellRenderer {
public Component getListCellRendererComponent(JList list, Object contents,
int index, boolean isSelected,
boolean cellHasFocus) {
String value = (String) contents;
final String key = wallet.keychain.get(0).toAddress(params).toString();
value = "<html>" + value.replaceAll("\n", "<br>").replaceAll("<br> ", "<br>&nbsp;&nbsp;")
.replaceAll(key, "<i>" + key + "</i>");
setText(value);
setOpaque(true);
setBackground(index % 2 == 1 ? new Color(230, 230, 230) : Color.WHITE);
return this;
}
}
}