Java Code Examples for org.bitcoinj.core.TransactionOutput#isMine()

/**
 * Construct a SendRequest for a CPFP (child-pays-for-parent) transaction. The resulting transaction is already
 * completed, so you should directly proceed to signing and broadcasting/committing the transaction. CPFP is
 * currently only supported by a few miners, so use with care.
 */
public static SendRequest childPaysForParent(Wallet wallet, Transaction parentTransaction, Coin feeRaise) {
    TransactionOutput outputToSpend = null;
    for (final TransactionOutput output : parentTransaction.getOutputs()) {
        if (output.isMine(wallet) && output.isAvailableForSpending()
                && output.getValue().isGreaterThan(feeRaise)) {
            outputToSpend = output;
            break;
        }
    }
    // TODO spend another confirmed output of own wallet if needed
    checkNotNull(outputToSpend, "Can't find adequately sized output that spends to us");

    final Transaction tx = new Transaction(parentTransaction.getParams());
    tx.addInput(outputToSpend);
    tx.addOutput(outputToSpend.getValue().subtract(feeRaise), wallet.freshAddress(KeyPurpose.CHANGE));
    tx.setPurpose(Transaction.Purpose.RAISE_FEE);
    final SendRequest req = forTx(tx);
    req.completed = true;
    return req;
}
 

/**
 * Construct a SendRequest for a CPFP (child-pays-for-parent) transaction. The resulting transaction is already
 * completed, so you should directly proceed to signing and broadcasting/committing the transaction. CPFP is
 * currently only supported by a few miners, so use with care.
 */
public static SendRequest childPaysForParent(Wallet wallet, Transaction parentTransaction, Coin feeRaise) {
    TransactionOutput outputToSpend = null;
    for (final TransactionOutput output : parentTransaction.getOutputs()) {
        if (output.isMine(wallet) && output.isAvailableForSpending()
                && output.getValue().isGreaterThan(feeRaise)) {
            outputToSpend = output;
            break;
        }
    }
    // TODO spend another confirmed output of own wallet if needed
    checkNotNull(outputToSpend, "Can't find adequately sized output that spends to us");

    final Transaction tx = new Transaction(parentTransaction.getParams());
    tx.addInput(outputToSpend);
    tx.addOutput(outputToSpend.getValue().subtract(feeRaise), wallet.freshAddress(KeyPurpose.CHANGE));
    tx.setPurpose(Transaction.Purpose.RAISE_FEE);
    final SendRequest req = forTx(tx);
    req.completed = true;
    return req;
}
 

/**
 * Construct a SendRequest for a CPFP (child-pays-for-parent) transaction. The resulting transaction is already
 * completed, so you should directly proceed to signing and broadcasting/committing the transaction. CPFP is
 * currently only supported by a few miners, so use with care.
 */
public static SendRequest childPaysForParent(Wallet wallet, Transaction parentTransaction, Coin feeRaise) {
    TransactionOutput outputToSpend = null;
    for (final TransactionOutput output : parentTransaction.getOutputs()) {
        if (output.isMine(wallet) && output.isAvailableForSpending()
                && output.getValue().isGreaterThan(feeRaise)) {
            outputToSpend = output;
            break;
        }
    }
    // TODO spend another confirmed output of own wallet if needed
    checkNotNull(outputToSpend, "Can't find adequately sized output that spends to us");

    final Transaction tx = new Transaction(parentTransaction.getParams());
    tx.addInput(outputToSpend);
    tx.addOutput(outputToSpend.getValue().subtract(feeRaise), wallet.freshAddress(KeyPurpose.CHANGE));
    tx.setPurpose(Transaction.Purpose.RAISE_FEE);
    final SendRequest req = forTx(tx);
    req.completed = true;
    return req;
}
 

public Transaction signTx(Transaction tx) throws WalletException, TransactionVerificationException {
    for (int i = 0; i < tx.getInputs().size(); i++) {
        TransactionInput txIn = tx.getInputs().get(i);
        TransactionOutput connectedOutput = txIn.getConnectedOutput();
        if (connectedOutput != null && connectedOutput.isMine(wallet)) {
            signTransactionInput(wallet, aesKey, tx, txIn, i);
            checkScriptSig(tx, txIn, i);
        }
    }

    for (TransactionOutput txo : tx.getOutputs()) {
        Coin value = txo.getValue();
        // OpReturn outputs have value 0
        if (value.isPositive()) {
            checkArgument(Restrictions.isAboveDust(txo.getValue()),
                    "An output value is below dust limit. Transaction=" + tx);
        }
    }

    checkWalletConsistency(wallet);
    verifyTransaction(tx);
    printTx("BSQ wallet: Signed Tx", tx);
    return tx;
}
 

public Transaction signTx(Transaction tx) throws WalletException, TransactionVerificationException {
    for (int i = 0; i < tx.getInputs().size(); i++) {
        TransactionInput txIn = tx.getInputs().get(i);
        TransactionOutput connectedOutput = txIn.getConnectedOutput();
        if (connectedOutput != null && connectedOutput.isMine(wallet)) {
            signTransactionInput(wallet, aesKey, tx, txIn, i);
            checkScriptSig(tx, txIn, i);
        }
    }

    checkWalletConsistency(wallet);
    verifyTransaction(tx);
    printTx("BSQ wallet: Signed Tx", tx);
    return tx;
}
 

public boolean isTransactionOutputMine(TransactionOutput transactionOutput) {
    return transactionOutput.isMine(wallet);
}
 

/**
 * Once a tx gets committed to our BSQ wallet we store the change output for allowing it to be spent in follow-up
 * transactions.
 */
public void onCommitTx(Transaction tx, TxType txType, Wallet wallet) {
    // We remove all potential connected outputs from our inputs as they would have been spent.
    removeConnectedOutputsOfInputsOfTx(tx);

    int changeOutputIndex;
    switch (txType) {
        case UNDEFINED_TX_TYPE:
        case UNVERIFIED:
        case INVALID:
        case GENESIS:
            return;
        case TRANSFER_BSQ:
            changeOutputIndex = 1; // output 0 is receiver's address
            break;
        case PAY_TRADE_FEE:
            changeOutputIndex = 0;
            break;
        case PROPOSAL:
            changeOutputIndex = 0;
            break;
        case COMPENSATION_REQUEST:
        case REIMBURSEMENT_REQUEST:
            changeOutputIndex = 0;
            break;
        case BLIND_VOTE:
            changeOutputIndex = 1; // output 0 is stake
            break;
        case VOTE_REVEAL:
            changeOutputIndex = 0;
            break;
        case LOCKUP:
            changeOutputIndex = 1; // output 0 is lockup amount
            break;
        case UNLOCK:
            // We don't allow to spend the unlocking funds as there is the lock time which need to pass,
            // otherwise the funds get burned!
            return;
        case ASSET_LISTING_FEE:
            changeOutputIndex = 0;
            break;
        case PROOF_OF_BURN:
            changeOutputIndex = 0;
            break;
        case IRREGULAR:
            return;
        default:
            return;
    }

    // It can be that we don't have a BSQ and a BTC change output.
    // If no BSQ change but a BTC change the index points to the BTC output and then
    // we detect that it is not part of our wallet.
    // If there is a BSQ change but no BTC change it has no effect as we ignore BTC outputs anyway.
    // If both change outputs do not exist then we might point to an index outside
    // of the list and we return at our scope check.

    // If no BTC output (unlikely but
    // possible) the index points to the BTC output and then we detect that it is not part of our wallet.
    //
    List<TransactionOutput> outputs = tx.getOutputs();
    if (changeOutputIndex > outputs.size() - 1)
        return;

    TransactionOutput change = outputs.get(changeOutputIndex);
    if (!change.isMine(wallet))
        return;

    UnconfirmedTxOutput txOutput = UnconfirmedTxOutput.fromTransactionOutput(change);
    if (unconfirmedBsqChangeOutputList.containsTxOutput(txOutput))
        return;

    unconfirmedBsqChangeOutputList.add(txOutput);
    persist();
}
 

public boolean isTransactionOutputMine(TransactionOutput transactionOutput) {
    return transactionOutput.isMine(wallet);
}