diff options
Diffstat (limited to 'src/script/script.cpp')
-rw-r--r-- | src/script/script.cpp | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/script/script.cpp b/src/script/script.cpp index 6b1eb52bbf..73f5a61bf6 100644 --- a/src/script/script.cpp +++ b/src/script/script.cpp @@ -210,6 +210,24 @@ bool CScript::IsPayToScriptHash() const (*this)[22] == OP_EQUAL); } +// A witness program is any valid CScript that consists of a 1-byte push opcode +// followed by a data push between 2 and 40 bytes. +bool CScript::IsWitnessProgram(int& version, std::vector<unsigned char>& program) const +{ + if (this->size() < 4 || this->size() > 42) { + return false; + } + if ((*this)[0] != OP_0 && ((*this)[0] < OP_1 || (*this)[0] > OP_16)) { + return false; + } + if ((size_t)((*this)[1] + 2) == this->size()) { + version = DecodeOP_N((opcodetype)(*this)[0]); + program = std::vector<unsigned char>(this->begin() + 2, this->end()); + return true; + } + return false; +} + bool CScript::IsPushOnly(const_iterator pc) const { while (pc < end()) |