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Add a Transaction.hashTransactionForSignature prototype that accepts Script objects instead of byte arrays.

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This could all be cleaned up and made more consistent in future.
This commit is contained in:
Mike Hearn 2013-04-26 13:47:26 +02:00
parent 38b40a245a
commit 172f264ee2
1 changed files with 25 additions and 8 deletions
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33
core/src/main/java/com/google/bitcoin/core/Transaction.java
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@ -786,29 +786,46 @@ public class Transaction extends ChildMessage implements Serializable {
}
/**
* Calculates a signature hash, that is, a hash of a simplified form of the transaction. How exactly the transaction
* is simplified is specified by the type and anyoneCanPay parameters.<p>
* <p>Calculates a signature hash, that is, a hash of a simplified form of the transaction. How exactly the transaction
* is simplified is specified by the type and anyoneCanPay parameters.</p>
*
* You don't normally ever need to call this yourself. It will become more useful in future as the contracts
* features of Bitcoin are developed.
* <p>You don't normally ever need to call this yourself. It will become more useful in future as the contracts
* features of Bitcoin are developed.</p>
*
* @param inputIndex input the signature is being calculated for. Tx signatures are always relative to an input.
* @param connectedScript the bytes that should be in the given input during signing.
* @param type Should be SigHash.ALL
* @param anyoneCanPay should be false.
* @throws ScriptException if connectedScript is invalid
*/
public synchronized Sha256Hash hashTransactionForSignature(int inputIndex, byte[] connectedScript,
SigHash type, boolean anyoneCanPay) throws ScriptException {
SigHash type, boolean anyoneCanPay) {
return hashTransactionForSignature(inputIndex, connectedScript, (byte)((type.ordinal() + 1) | (anyoneCanPay ? 0x80 : 0x00)));
}
/**
* <p>Calculates a signature hash, that is, a hash of a simplified form of the transaction. How exactly the transaction
* is simplified is specified by the type and anyoneCanPay parameters.</p>
*
* <p>You don't normally ever need to call this yourself. It will become more useful in future as the contracts
* features of Bitcoin are developed.</p>
*
* @param inputIndex input the signature is being calculated for. Tx signatures are always relative to an input.
* @param connectedScript the script that should be in the given input during signing.
* @param type Should be SigHash.ALL
* @param anyoneCanPay should be false.
*/
public synchronized Sha256Hash hashTransactionForSignature(int inputIndex, Script connectedScript,
SigHash type, boolean anyoneCanPay) {
return hashTransactionForSignature(inputIndex, connectedScript.getProgram(),
(byte)((type.ordinal() + 1) | (anyoneCanPay ? 0x80 : 0x00)));
}
/**
* This is required for signatures which use a sigHashType which cannot be represented using SigHash and anyoneCanPay
* See transaction c99c49da4c38af669dea436d3e73780dfdb6c1ecf9958baa52960e8baee30e73, which has sigHashType 0
*/
public synchronized Sha256Hash hashTransactionForSignature(int inputIndex, byte[] connectedScript,
byte sigHashType) throws ScriptException {
byte sigHashType) {
// TODO: This whole separate method should be un-necessary if we fix how we deserialize sighash flags.
// The SIGHASH flags are used in the design of contracts, please see this page for a further understanding of