Example #1
0
 private static Block createGenesis(NetworkParameters n) {
   Block genesisBlock = new Block(n);
   Transaction t = new Transaction(n);
   try {
     // A script containing the difficulty bits and the following message:
     //
     //   "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks"
     byte[] bytes =
         Utils.HEX.decode(
             "04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73");
     t.addInput(new TransactionInput(n, t, bytes));
     ByteArrayOutputStream scriptPubKeyBytes = new ByteArrayOutputStream();
     Script.writeBytes(
         scriptPubKeyBytes,
         Utils.HEX.decode(
             "04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f"));
     scriptPubKeyBytes.write(ScriptOpCodes.OP_CHECKSIG);
     t.addOutput(new TransactionOutput(n, t, FIFTY_COINS, scriptPubKeyBytes.toByteArray()));
   } catch (Exception e) {
     // Cannot happen.
     throw new RuntimeException(e);
   }
   genesisBlock.addTransaction(t);
   return genesisBlock;
 }
 @Test
 public void raiseFeeTx() throws Exception {
   // Check basic tx serialization.
   Coin v1 = COIN;
   Transaction t1 = createFakeTx(params, v1, myAddress);
   t1.setPurpose(Purpose.RAISE_FEE);
   myWallet.receivePending(t1, null);
   Wallet wallet1 = roundTrip(myWallet);
   Transaction t1copy = wallet1.getTransaction(t1.getHash());
   assertEquals(Purpose.RAISE_FEE, t1copy.getPurpose());
 }
  @Test
  public void doubleSpend() throws Exception {
    // Check that we can serialize double spends correctly, as this is a slightly tricky case.
    FakeTxBuilder.DoubleSpends doubleSpends =
        FakeTxBuilder.createFakeDoubleSpendTxns(params, myAddress);
    // t1 spends to our wallet.
    myWallet.receivePending(doubleSpends.t1, null);
    // t2 rolls back t1 and spends somewhere else.
    myWallet.receiveFromBlock(doubleSpends.t2, null, BlockChain.NewBlockType.BEST_CHAIN, 0);
    Wallet wallet1 = roundTrip(myWallet);
    assertEquals(1, wallet1.getTransactions(true).size());
    Transaction t1 = wallet1.getTransaction(doubleSpends.t1.getHash());
    assertEquals(ConfidenceType.DEAD, t1.getConfidence().getConfidenceType());
    assertEquals(Coin.ZERO, wallet1.getBalance());

    // TODO: Wallet should store overriding transactions even if they are not wallet-relevant.
    // assertEquals(doubleSpends.t2, t1.getConfidence().getOverridingTransaction());
  }
 @Test
 public void coinbaseTxns() throws Exception {
   // Covers issue 420 where the outpoint index of a coinbase tx input was being mis-serialized.
   Block b =
       params
           .getGenesisBlock()
           .createNextBlockWithCoinbase(
               Block.BLOCK_VERSION_GENESIS,
               myKey.getPubKey(),
               FIFTY_COINS,
               Block.BLOCK_HEIGHT_GENESIS);
   Transaction coinbase = b.getTransactions().get(0);
   assertTrue(coinbase.isCoinBase());
   BlockChain chain = new BlockChain(params, myWallet, new MemoryBlockStore(params));
   assertTrue(chain.add(b));
   // Wallet now has a coinbase tx in it.
   assertEquals(1, myWallet.getTransactions(true).size());
   assertTrue(myWallet.getTransaction(coinbase.getHash()).isCoinBase());
   Wallet wallet2 = roundTrip(myWallet);
   assertEquals(1, wallet2.getTransactions(true).size());
   assertTrue(wallet2.getTransaction(coinbase.getHash()).isCoinBase());
 }
  @Test
  public void peerGroupWalletIntegration() throws Exception {
    // Make sure we can create spends, and that they are announced. Then do the same with offline
    // mode.

    // Set up connections and block chain.
    VersionMessage ver = new VersionMessage(params, 2);
    ver.localServices = VersionMessage.NODE_NETWORK;
    InboundMessageQueuer p1 = connectPeer(1, ver);
    InboundMessageQueuer p2 = connectPeer(2);

    // Send ourselves a bit of money.
    Block b1 = FakeTxBuilder.makeSolvedTestBlock(blockStore, address);
    inbound(p1, b1);
    pingAndWait(p1);
    assertNull(outbound(p1));
    assertEquals(FIFTY_COINS, wallet.getBalance());

    // Check that the wallet informs us of changes in confidence as the transaction ripples across
    // the network.
    final Transaction[] transactions = new Transaction[1];
    wallet.addEventListener(
        new AbstractWalletEventListener() {
          @Override
          public void onTransactionConfidenceChanged(Wallet wallet, Transaction tx) {
            transactions[0] = tx;
          }
        });

    // Now create a spend, and expect the announcement on p1.
    Address dest = new ECKey().toAddress(params);
    Wallet.SendResult sendResult = wallet.sendCoins(peerGroup, dest, COIN);
    assertNotNull(sendResult.tx);
    Threading.waitForUserCode();
    assertFalse(sendResult.broadcastComplete.isDone());
    assertEquals(transactions[0], sendResult.tx);
    assertEquals(0, transactions[0].getConfidence().numBroadcastPeers());
    transactions[0] = null;
    Transaction t1;
    {
      peerGroup.waitForJobQueue();
      Message m = outbound(p1);
      // Hack: bloom filters are recalculated asynchronously to sending transactions to avoid lock
      // inversion, so we might or might not get the filter/mempool message first or second.
      while (!(m instanceof Transaction)) m = outbound(p1);
      t1 = (Transaction) m;
    }
    assertNotNull(t1);
    // 49 BTC in change.
    assertEquals(valueOf(49, 0), t1.getValueSentToMe(wallet));
    // The future won't complete until it's heard back from the network on p2.
    InventoryMessage inv = new InventoryMessage(params);
    inv.addTransaction(t1);
    inbound(p2, inv);
    pingAndWait(p2);
    Threading.waitForUserCode();
    assertTrue(sendResult.broadcastComplete.isDone());
    assertEquals(transactions[0], sendResult.tx);
    assertEquals(1, transactions[0].getConfidence().numBroadcastPeers());
    // Confirm it.
    Block b2 = FakeTxBuilder.createFakeBlock(blockStore, t1).block;
    inbound(p1, b2);
    pingAndWait(p1);
    assertNull(outbound(p1));

    // Do the same thing with an offline transaction.
    peerGroup.removeWallet(wallet);
    Wallet.SendRequest req = Wallet.SendRequest.to(dest, valueOf(2, 0));
    req.ensureMinRequiredFee = false;
    Transaction t3 = checkNotNull(wallet.sendCoinsOffline(req));
    assertNull(outbound(p1)); // Nothing sent.
    // Add the wallet to the peer group (simulate initialization). Transactions should be announced.
    peerGroup.addWallet(wallet);
    // Transaction announced to the first peer. No extra Bloom filter because no change address was
    // needed.
    assertEquals(t3.getHash(), ((Transaction) outbound(p1)).getHash());
  }
  @Test
  public void testAppearedAtChainHeightDepthAndWorkDone() throws Exception {
    // Test the TransactionConfidence appearedAtChainHeight, depth and workDone field are stored.

    BlockChain chain = new BlockChain(params, myWallet, new MemoryBlockStore(params));

    final ArrayList<Transaction> txns = new ArrayList<Transaction>(2);
    myWallet.addEventListener(
        new AbstractWalletEventListener() {
          @Override
          public void onCoinsReceived(
              Wallet wallet, Transaction tx, Coin prevBalance, Coin newBalance) {
            txns.add(tx);
          }
        });

    // Start by building two blocks on top of the genesis block.
    Block b1 = params.getGenesisBlock().createNextBlock(myAddress);
    BigInteger work1 = b1.getWork();
    assertTrue(work1.signum() > 0);

    Block b2 = b1.createNextBlock(myAddress);
    BigInteger work2 = b2.getWork();
    assertTrue(work2.signum() > 0);

    assertTrue(chain.add(b1));
    assertTrue(chain.add(b2));

    // We now have the following chain:
    //     genesis -> b1 -> b2

    // Check the transaction confidence levels are correct before wallet roundtrip.
    Threading.waitForUserCode();
    assertEquals(2, txns.size());

    TransactionConfidence confidence0 = txns.get(0).getConfidence();
    TransactionConfidence confidence1 = txns.get(1).getConfidence();

    assertEquals(1, confidence0.getAppearedAtChainHeight());
    assertEquals(2, confidence1.getAppearedAtChainHeight());

    assertEquals(2, confidence0.getDepthInBlocks());
    assertEquals(1, confidence1.getDepthInBlocks());

    // Roundtrip the wallet and check it has stored the depth and workDone.
    Wallet rebornWallet = roundTrip(myWallet);

    Set<Transaction> rebornTxns = rebornWallet.getTransactions(false);
    assertEquals(2, rebornTxns.size());

    // The transactions are not guaranteed to be in the same order so sort them to be in chain
    // height order if required.
    Iterator<Transaction> it = rebornTxns.iterator();
    Transaction txA = it.next();
    Transaction txB = it.next();

    Transaction rebornTx0, rebornTx1;
    if (txA.getConfidence().getAppearedAtChainHeight() == 1) {
      rebornTx0 = txA;
      rebornTx1 = txB;
    } else {
      rebornTx0 = txB;
      rebornTx1 = txA;
    }

    TransactionConfidence rebornConfidence0 = rebornTx0.getConfidence();
    TransactionConfidence rebornConfidence1 = rebornTx1.getConfidence();

    assertEquals(1, rebornConfidence0.getAppearedAtChainHeight());
    assertEquals(2, rebornConfidence1.getAppearedAtChainHeight());

    assertEquals(2, rebornConfidence0.getDepthInBlocks());
    assertEquals(1, rebornConfidence1.getDepthInBlocks());
  }
  @Test
  public void oneTx() throws Exception {
    // Check basic tx serialization.
    Coin v1 = COIN;
    Transaction t1 = createFakeTx(params, v1, myAddress);
    t1.getConfidence().markBroadcastBy(new PeerAddress(InetAddress.getByName("1.2.3.4")));
    t1.getConfidence().markBroadcastBy(new PeerAddress(InetAddress.getByName("5.6.7.8")));
    t1.getConfidence().setSource(TransactionConfidence.Source.NETWORK);
    myWallet.receivePending(t1, null);
    Wallet wallet1 = roundTrip(myWallet);
    assertEquals(1, wallet1.getTransactions(true).size());
    assertEquals(v1, wallet1.getBalance(Wallet.BalanceType.ESTIMATED));
    Transaction t1copy = wallet1.getTransaction(t1.getHash());
    assertArrayEquals(t1.bitcoinSerialize(), t1copy.bitcoinSerialize());
    assertEquals(2, t1copy.getConfidence().numBroadcastPeers());
    assertEquals(TransactionConfidence.Source.NETWORK, t1copy.getConfidence().getSource());

    Protos.Wallet walletProto = new WalletProtobufSerializer().walletToProto(myWallet);
    assertEquals(Protos.Key.Type.ORIGINAL, walletProto.getKey(0).getType());
    assertEquals(0, walletProto.getExtensionCount());
    assertEquals(1, walletProto.getTransactionCount());
    assertEquals(6, walletProto.getKeyCount());

    Protos.Transaction t1p = walletProto.getTransaction(0);
    assertEquals(0, t1p.getBlockHashCount());
    assertArrayEquals(t1.getHash().getBytes(), t1p.getHash().toByteArray());
    assertEquals(Protos.Transaction.Pool.PENDING, t1p.getPool());
    assertFalse(t1p.hasLockTime());
    assertFalse(t1p.getTransactionInput(0).hasSequence());
    assertArrayEquals(
        t1.getInputs().get(0).getOutpoint().getHash().getBytes(),
        t1p.getTransactionInput(0).getTransactionOutPointHash().toByteArray());
    assertEquals(0, t1p.getTransactionInput(0).getTransactionOutPointIndex());
    assertEquals(t1p.getTransactionOutput(0).getValue(), v1.value);
  }