/**
* Sign scriptPubKey using signature made with creator.
* Signatures are returned in scriptSigRet (or returns false if scriptPubKey can't be signed),
* unless whichTypeRet is TX_SCRIPTHASH, in which case scriptSigRet is the redemption script.
* Returns false if scriptPubKey could not be completely satisfied.
*/
static bool SignStep(const SigningProvider& provider, const BaseSignatureCreator& creator, const CScript& scriptPubKey,
std::vector<valtype>& ret, txnouttype& whichTypeRet, SigVersion sigversion)
{
CScript scriptRet;
uint160 h160;
ret.clear();
std::vector<valtype> vSolutions;
if (!Solver(scriptPubKey, whichTypeRet, vSolutions))
return false;
CKeyID keyID;
switch (whichTypeRet)
{
case TX_NONSTANDARD:
case TX_NULL_DATA:
case TX_WITNESS_UNKNOWN:
return false;
case TX_PUBKEY:
keyID = CPubKey(vSolutions[0]).GetID();
return Sign1(provider, keyID, creator, scriptPubKey, ret, sigversion);
case TX_PUBKEYHASH:
keyID = CKeyID(uint160(vSolutions[0]));
if (!Sign1(provider, keyID, creator, scriptPubKey, ret, sigversion))
return false;
else
{
CPubKey vch;
provider.GetPubKey(keyID, vch);
ret.push_back(ToByteVector(vch));
}
return true;
case TX_SCRIPTHASH:
if (provider.GetCScript(uint160(vSolutions[0]), scriptRet)) {
ret.push_back(std::vector<unsigned char>(scriptRet.begin(), scriptRet.end()));
return true;
}
return false;
case TX_MULTISIG:
ret.push_back(valtype()); // workaround CHECKMULTISIG bug
return (SignN(provider, vSolutions, creator, scriptPubKey, ret, sigversion));
case TX_WITNESS_V0_KEYHASH:
ret.push_back(vSolutions[0]);
return true;
case TX_WITNESS_V0_SCRIPTHASH:
CRIPEMD160().Write(&vSolutions[0][0], vSolutions[0].size()).Finalize(h160.begin());
if (provider.GetCScript(h160, scriptRet)) {
ret.push_back(std::vector<unsigned char>(scriptRet.begin(), scriptRet.end()));
return true;
}
return false;
default:
return false;
}
}
static bool GetCScript(const SigningProvider& provider, const SignatureData& sigdata, const CScriptID& scriptid, CScript& script)
{
if (provider.GetCScript(scriptid, script)) {
return true;
}
// Look for scripts in SignatureData
if (CScriptID(sigdata.redeem_script) == scriptid) {
script = sigdata.redeem_script;
return true;
} else if (CScriptID(sigdata.witness_script) == scriptid) {
script = sigdata.witness_script;
return true;
}
return false;
}