org.bitcoinj.wallet.RedeemData Maven / Gradle / Ivy
/*
* Copyright 2014 Kosta Korenkov
*
* 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;
import org.bitcoinj.core.ECKey;
import org.bitcoinj.script.Script;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import static com.google.common.base.Preconditions.checkArgument;
/**
* This class aggregates data required to spend transaction output.
*
* For pay-to-address and pay-to-pubkey transactions it will have only a single key and CHECKSIG program as redeemScript.
* For multisignature transactions there will be multiple keys one of which will be a full key and the rest are watch only,
* redeem script will be a CHECKMULTISIG program. Keys will be sorted in the same order they appear in
* a program (lexicographical order).
*/
public class RedeemData {
public final Script redeemScript;
public final List keys;
private RedeemData(List keys, Script redeemScript) {
this.redeemScript = redeemScript;
List sortedKeys = new ArrayList(keys);
Collections.sort(sortedKeys, ECKey.PUBKEY_COMPARATOR);
this.keys = sortedKeys;
}
public static RedeemData of(List keys, Script redeemScript) {
return new RedeemData(keys, redeemScript);
}
/**
* Creates RedeemData for pay-to-address or pay-to-pubkey input. Provided key is a single private key needed
* to spend such inputs and provided program should be a proper CHECKSIG program.
*/
public static RedeemData of(ECKey key, Script program) {
checkArgument(program.isSentToAddress() || program.isSentToRawPubKey());
return key != null ? new RedeemData(Collections.singletonList(key), program) : null;
}
/**
* Returns the first key that has private bytes
*/
public ECKey getFullKey() {
for (ECKey key : keys)
if (key.hasPrivKey())
return key;
return null;
}
}