/*
* Copyright 2013 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.bitcoinj.wallet.listeners;
import org.bitcoinj.wallet.Wallet;
/**
* <p>Implementors are called when the contents of the wallet changes, for instance due to receiving/sending money
* or a block chain re-organize. It may be convenient to derive from {@link AbstractWalletEventListener} instead.</p>
*/
public interface WalletChangeEventListener {
/**
* <p>Designed for GUI applications to refresh their transaction lists. This callback is invoked in the following
* situations:</p>
*
* <ol>
* <li>A new block is received (and thus building transactions got more confidence)</li>
* <li>A pending transaction is received</li>
* <li>A pending transaction changes confidence due to some non-new-block related event, such as being
* announced by more peers or by a double-spend conflict being observed.</li>
* <li>A re-organize occurs. Call occurs only if the re-org modified any of our transactions.</li>
* <li>A new spend is committed to the wallet.</li>
* <li>The wallet is reset and all transactions removed.<li>
* </ol>
*
* <p>When this is called you can refresh the UI contents from the wallet contents. It's more efficient to use
* this rather than onTransactionConfidenceChanged() + onReorganize() because you only get one callback per block
* rather than one per transaction per block. Note that this is <b>not</b> called when a key is added. </p>
*/
void onWalletChanged(Wallet wallet);
}