org.bitcoinj.core.TransactionInput Maven / Gradle / Ivy
/*
* Copyright 2011 Google Inc.
* Copyright 2014 Andreas Schildbach
*
* 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;
import org.bitcoinj.script.Script;
import org.bitcoinj.script.ScriptError;
import org.bitcoinj.script.ScriptException;
import org.bitcoinj.wallet.DefaultRiskAnalysis;
import org.bitcoinj.wallet.KeyBag;
import org.bitcoinj.wallet.RedeemData;
import com.google.common.base.Joiner;
import com.google.common.base.Objects;
import javax.annotation.Nullable;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.ref.WeakReference;
import java.util.Arrays;
import java.util.EnumSet;
import java.util.Map;
import java.util.Set;
import static com.google.common.base.Preconditions.checkElementIndex;
import static com.google.common.base.Preconditions.checkNotNull;
/**
* A transfer of coins from one address to another creates a transaction in which the outputs
* can be claimed by the recipient in the input of another transaction. You can imagine a
* transaction as being a module which is wired up to others, the inputs of one have to be wired
* to the outputs of another. The exceptions are coinbase transactions, which create new coins.
*
* Instances of this class are not safe for use by multiple threads.
*/
public class TransactionInput extends ChildMessage {
/** Magic sequence number that indicates there is no sequence number. */
public static final long NO_SEQUENCE = 0xFFFFFFFFL;
private static final byte[] EMPTY_ARRAY = new byte[0];
// Magic outpoint index that indicates the input is in fact unconnected.
private static final long UNCONNECTED = 0xFFFFFFFFL;
// Allows for altering transactions after they were broadcast. Values below NO_SEQUENCE-1 mean it can be altered.
private long sequence;
// Data needed to connect to the output of the transaction we're gathering coins from.
private TransactionOutPoint outpoint;
// The "script bytes" might not actually be a script. In coinbase transactions where new coins are minted there
// is no input transaction, so instead the scriptBytes contains some extra stuff (like a rollover nonce) that we
// don't care about much. The bytes are turned into a Script object (cached below) on demand via a getter.
private byte[] scriptBytes;
// The Script object obtained from parsing scriptBytes. Only filled in on demand and if the transaction is not
// coinbase.
private WeakReference