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OutPoint.java
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/**
* Copyright 2013 Ronald W Hoffman
*
* 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 JavaBitcoin;
/**
* An outpoint describes the transaction output that is connected to a transaction input. It consists
* of the hash for the transaction containing the output and the index of the output within the transaction.
*/
public class OutPoint {
/** The transaction hash */
private Sha256Hash txHash;
/** The output index */
private int outputIndex;
/**
* Creates a new transaction output point
*
* @param txHash Hash for the transaction output
* @param outputIndex Index of the output within the transaction
*/
public OutPoint(Sha256Hash txHash, int outputIndex) {
this.txHash = txHash;
this.outputIndex = outputIndex;
}
/**
* Returns the transaction hash
*
* @return Transaction hash
*/
public Sha256Hash getHash() {
return txHash;
}
/**
* Returns the output index
*
* @return Output index
*/
public int getIndex() {
return outputIndex;
}
/**
* Serializes the outpoint
*
* @return Byte array containing serialized data
*/
public byte[] bitcoinSerialize() {
byte[] bytes = new byte[36];
System.arraycopy(Utils.reverseBytes(txHash.getBytes()), 0, bytes, 0, 32);
Utils.uint32ToByteArrayLE(outputIndex, bytes, 32);
return bytes;
}
/**
* Returns the hash code
*
* @return Hash code
*/
@Override
public int hashCode() {
return txHash.hashCode() ^ (int)(outputIndex|(outputIndex<<16));
}
/**
* Compares two objects
*
* @param obj Object to compare
* @return TRUE if they are equal
*/
@Override
public boolean equals(Object obj) {
boolean areEqual = false;
if (obj != null && (obj instanceof OutPoint)) {
OutPoint out = (OutPoint)obj;
areEqual = txHash.equals(out.txHash) && outputIndex == out.outputIndex;
}
return areEqual;
}
}