/**
* Creates a deterministic key chain that watches the given (public only) root key. You can use
* this to calculate balances and generally follow along, but spending is not possible with such a
* chain. Currently you can't use this method to watch an arbitrary fragment of some other tree,
* this limitation may be removed in future.
*/
public DeterministicKeyChain(DeterministicKey watchingKey, long creationTimeSeconds) {
checkArgument(watchingKey.isPubKeyOnly(), "Private subtrees not currently supported");
checkArgument(watchingKey.getPath().size() == 1, "You can only watch an account key currently");
basicKeyChain = new BasicKeyChain();
this.creationTimeSeconds = creationTimeSeconds;
this.seed = null;
initializeHierarchyUnencrypted(watchingKey);
}
/**
* A deterministic key is considered to be 'public key only' if it hasn't got a private key part
* and it cannot be rederived. If the hierarchy is encrypted this returns true.
*/
@Override
public boolean isPubKeyOnly() {
return super.isPubKeyOnly() && (parent == null || parent.isPubKeyOnly());
}