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Abstract out Ctransaction-specific signing into TransactionSignatureCreator

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This commit is contained in:
Pieter Wuille
2014-11-04 10:06:20 -08:00
parent f3948a30cd
commit 18051c7fbd
2 changed files with 91 additions and 41 deletions
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41
src/script/sign.h
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@@ -8,19 +8,52 @@
#include "script/interpreter.h"
class CKeyID;
class CKeyStore;
class CScript;
class CTransaction;
struct CMutableTransaction;
/** Virtual base class for signature creators. */
class BaseSignatureCreator {
protected:
const CKeyStore* keystore;
public:
BaseSignatureCreator(const CKeyStore* keystoreIn) : keystore(keystoreIn) {}
const CKeyStore& KeyStore() const { return *keystore; };
virtual ~BaseSignatureCreator() {}
virtual const BaseSignatureChecker& Checker() const =0;
/** Create a singular (non-script) signature. */
virtual bool CreateSig(std::vector<unsigned char>& vchSig, const CKeyID& keyid, const CScript& scriptCode) const =0;
};
/** A signature creator for transactions. */
class TransactionSignatureCreator : public BaseSignatureCreator {
const CTransaction* txTo;
unsigned int nIn;
int nHashType;
const TransactionSignatureChecker checker;
public:
TransactionSignatureCreator(const CKeyStore* keystoreIn, const CTransaction* txToIn, unsigned int nInIn, int nHashTypeIn=SIGHASH_ALL);
const BaseSignatureChecker& Checker() const { return checker; }
bool CreateSig(std::vector<unsigned char>& vchSig, const CKeyID& keyid, const CScript& scriptCode) const;
};
/** Produce a script signature using a generic signature creator. */
bool ProduceSignature(const BaseSignatureCreator& creator, const CScript& scriptPubKey, CScript& scriptSig);
/** Produce a script signature for a transaction. */
bool SignSignature(const CKeyStore& keystore, const CScript& fromPubKey, CMutableTransaction& txTo, unsigned int nIn, int nHashType=SIGHASH_ALL);
bool SignSignature(const CKeyStore& keystore, const CTransaction& txFrom, CMutableTransaction& txTo, unsigned int nIn, int nHashType=SIGHASH_ALL);
/**
* Given two sets of signatures for scriptPubKey, possibly with OP_0 placeholders,
* combine them intelligently and return the result.
*/
/** Combine two script signatures using a generic signature checker, intelligently, possibly with OP_0 placeholders. */
CScript CombineSignatures(const CScript& scriptPubKey, const BaseSignatureChecker& checker, const CScript& scriptSig1, const CScript& scriptSig2);
/** Combine two script signatures on transactions. */
CScript CombineSignatures(const CScript& scriptPubKey, const CTransaction& txTo, unsigned int nIn, const CScript& scriptSig1, const CScript& scriptSig2);
#endif // BITCOIN_SCRIPT_SIGN_H