/*
* Copyright 2011 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.core.listeners;
import java.util.List;
import org.bitcoinj.core.StoredBlock;
import org.bitcoinj.core.VerificationException;
/**
* Listener interface for when the best chain has changed.
*/
public interface ReorganizeListener {
/**
* Called by the {@link org.bitcoinj.core.BlockChain} when the best chain
* (representing total work done) has changed. In this case,
* we need to go through our transactions and find out if any have become invalid. It's possible for our balance
* to go down in this case: money we thought we had can suddenly vanish if the rest of the network agrees it
* should be so.<p>
*
* The oldBlocks/newBlocks lists are ordered height-wise from top first to bottom last (i.e. newest blocks first).
*/
void reorganize(StoredBlock splitPoint, List<StoredBlock> oldBlocks,
List<StoredBlock> newBlocks) throws VerificationException;
}