@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);
  }
 @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());
  }