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Change Solver() output for WITNESS_V1_TAPROOT

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This is just a small simplification to prepare for the follow-up instruction
of a CTxDestination variant for taproot outputs.

In the old code, WITNESS_V1_TAPROOT and WITNESS_UNKNOWN both produced
{version, program} as Solver() output. Change this so that WITNESS_V1_TAPROOT
produces just {program}, like WITNESS_V0_* do.
This commit is contained in:
Pieter Wuille 2021-05-23 18:00:18 -07:00
parent 4b1cc08f9f
commit 31df02a070
2 changed files with 14 additions and 7 deletions
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16
src/script/standard.cpp
View File

@ -155,15 +155,14 @@ TxoutType Solver(const CScript& scriptPubKey, std::vector<std::vector<unsigned c
std::vector<unsigned char> witnessprogram;
if (scriptPubKey.IsWitnessProgram(witnessversion, witnessprogram)) {
if (witnessversion == 0 && witnessprogram.size() == WITNESS_V0_KEYHASH_SIZE) {
vSolutionsRet.push_back(witnessprogram);
vSolutionsRet.push_back(std::move(witnessprogram));
return TxoutType::WITNESS_V0_KEYHASH;
}
if (witnessversion == 0 && witnessprogram.size() == WITNESS_V0_SCRIPTHASH_SIZE) {
vSolutionsRet.push_back(witnessprogram);
vSolutionsRet.push_back(std::move(witnessprogram));
return TxoutType::WITNESS_V0_SCRIPTHASH;
}
if (witnessversion == 1 && witnessprogram.size() == WITNESS_V1_TAPROOT_SIZE) {
vSolutionsRet.push_back(std::vector<unsigned char>{(unsigned char)witnessversion});
vSolutionsRet.push_back(std::move(witnessprogram));
return TxoutType::WITNESS_V1_TAPROOT;
}
@ -242,8 +241,17 @@ bool ExtractDestination(const CScript& scriptPubKey, CTxDestination& addressRet)
addressRet = hash;
return true;
}
case TxoutType::WITNESS_UNKNOWN:
case TxoutType::WITNESS_V1_TAPROOT: {
/* For now, no WitnessV1Taproot variant in CTxDestination exists, so map
* this to WitnessUnknown. */
WitnessUnknown unk;
unk.version = 1;
std::copy(vSolutions[0].begin(), vSolutions[0].end(), unk.program);
unk.length = vSolutions[0].size();
addressRet = unk;
return true;
}
case TxoutType::WITNESS_UNKNOWN: {
WitnessUnknown unk;
unk.version = vSolutions[0][0];
std::copy(vSolutions[1].begin(), vSolutions[1].end(), unk.program);

5
src/test/script_standard_tests.cpp
View File

@ -111,9 +111,8 @@ BOOST_AUTO_TEST_CASE(script_standard_Solver_success)
s.clear();
s << OP_1 << ToByteVector(uint256::ZERO);
BOOST_CHECK_EQUAL(Solver(s, solutions), TxoutType::WITNESS_V1_TAPROOT);
BOOST_CHECK_EQUAL(solutions.size(), 2U);
BOOST_CHECK(solutions[0] == std::vector<unsigned char>{1});
BOOST_CHECK(solutions[1] == ToByteVector(uint256::ZERO));
BOOST_CHECK_EQUAL(solutions.size(), 1U);
BOOST_CHECK(solutions[0] == ToByteVector(uint256::ZERO));
// TxoutType::WITNESS_UNKNOWN
s.clear();