Package org.bitcoinj.wallet

Class DefaultCoinSelector

java.lang.Object

org.bitcoinj.wallet.DefaultCoinSelector

All Implemented Interfaces:

CoinSelector

Direct Known Subclasses:

AllowUnconfirmedCoinSelector

public class DefaultCoinSelector
extends Object
implements CoinSelector

This class implements a CoinSelector which attempts to get the highest priority possible. This means that the transaction is the most likely to get confirmed. Note that this means we may end up "spending" more priority than would be required to get the transaction we are creating confirmed.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	DefaultCoinSelector()

Method Summary

Modifier and Type	Method	Description
static int	compareByDepth(TransactionOutput a, TransactionOutput b)	Comparator for sorting TransactionOutput by coin depth, value, and then hash.
static CoinSelector	get(Network network)
static boolean	isSelectable(Transaction tx, Network network)	Helper to determine if this selector would select a given transaction.
CoinSelection	select(Coin target, List<TransactionOutput> candidates)	Creates a CoinSelection that tries to meet the target amount of value.
protected boolean	shouldSelect(Transaction tx)	Sub-classes can override this to just customize whether transactions are usable, but keep age sorting.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

DefaultCoinSelector

protected DefaultCoinSelector()

Method Details

select

public CoinSelection select(Coin target,
 List<TransactionOutput> candidates)

Description copied from interface: CoinSelector

Creates a CoinSelection that tries to meet the target amount of value. The candidates list is given to this call and can be edited freely. See the docs for CoinSelection to learn more, or look a the implementation of DefaultCoinSelector.

Specified by:

select in interface CoinSelector

compareByDepth

public static int compareByDepth(TransactionOutput a,
 TransactionOutput b)

Comparator for sorting TransactionOutput by coin depth, value, and then hash.

Parameters:

a - The first object to be compared

b - The second object to be compared

Returns:

a negative integer, zero, or a positive integer as the first argument is less than, equal to, or greater than the second.

shouldSelect

protected boolean shouldSelect(Transaction tx)

Sub-classes can override this to just customize whether transactions are usable, but keep age sorting.

isSelectable

public static boolean isSelectable(Transaction tx,
 Network network)

Helper to determine if this selector would select a given transaction. Note that in a regtest network outgoing payments will likely not see propagation, so there is a special exception.

Parameters:

tx - transaction to determine if it would be selected

network - network the transaction is on

Returns:

true if it would be selected, false otherwise

get

public static CoinSelector get(Network network)