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Tweak SignatureChecker to expose a bit more about the transaction

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This commit is contained in:
Matt Corallo 2015-05-27 12:30:42 -07:00 • committed by Gregory Sanders
parent 6772ca1f25
commit 4ab8b0823a
17 changed files with 159 additions and 82 deletions
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41
src/script/interpreter.cpp
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@ -1246,12 +1246,22 @@ uint256 SignatureHash(const CScript& scriptCode, const CTransaction& txTo, unsig
return ss.GetHash();
}
bool TransactionSignatureChecker::VerifySignature(const std::vector<unsigned char>& vchSig, const CPubKey& pubkey, const uint256& sighash) const
CTxOut BaseSignatureChecker::GetOutputOffsetFromCurrent(const int offset) const
{
return CTxOut();
}
COutPoint BaseSignatureChecker::GetPrevOut() const
{
return COutPoint();
}
bool TransactionNoWithdrawsSignatureChecker::VerifySignature(const std::vector<unsigned char>& vchSig, const CPubKey& pubkey, const uint256& sighash) const
{
return pubkey.Verify(sighash, vchSig);
}
bool TransactionSignatureChecker::CheckSig(const vector<unsigned char>& vchSigIn, const vector<unsigned char>& vchPubKey, const CScript& scriptCode, SigVersion sigversion) const
bool TransactionNoWithdrawsSignatureChecker::CheckSig(const vector<unsigned char>& vchSigIn, const vector<unsigned char>& vchPubKey, const CScript& scriptCode, SigVersion sigversion) const
{
CPubKey pubkey(vchPubKey);
if (!pubkey.IsValid())
@ -1272,7 +1282,7 @@ bool TransactionSignatureChecker::CheckSig(const vector<unsigned char>& vchSigIn
return true;
}
bool TransactionSignatureChecker::CheckLockTime(const CScriptNum& nLockTime) const
bool TransactionNoWithdrawsSignatureChecker::CheckLockTime(const CScriptNum& nLockTime) const
{
// There are two kinds of nLockTime: lock-by-blockheight
// and lock-by-blocktime, distinguished by whether
@ -1308,7 +1318,7 @@ bool TransactionSignatureChecker::CheckLockTime(const CScriptNum& nLockTime) con
return true;
}
bool TransactionSignatureChecker::CheckSequence(const CScriptNum& nSequence) const
bool TransactionNoWithdrawsSignatureChecker::CheckSequence(const CScriptNum& nSequence) const
{
// Relative lock times are supported by comparing the passed
// in operand to the sequence number of the input.
@ -1354,6 +1364,29 @@ bool TransactionSignatureChecker::CheckSequence(const CScriptNum& nSequence) con
return true;
}
CTxOut TransactionSignatureChecker::GetOutputOffsetFromCurrent(const int offset) const
{
assert(int(nIn) >= 0 && int(txTo->vout.size()) > 0);
if (int(nIn) + offset < 0 || int(txTo->vout.size()) <= int(nIn) + offset)
return CTxOut();
return txTo->vout[int(nIn) + offset];
}
COutPoint TransactionSignatureChecker::GetPrevOut() const
{
return txTo->vin[nIn].prevout;
}
CAmount TransactionSignatureChecker::GetValueIn() const
{
return amount;
}
CAmount TransactionSignatureChecker::GetValueInPrevIn() const
{
return amountPreviousInput;
}
static bool VerifyWitnessProgram(const CScriptWitness& witness, int witversion, const std::vector<unsigned char>& program, unsigned int flags, const BaseSignatureChecker& checker, ScriptError* serror)
{
vector<vector<unsigned char> > stack;