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authorPieter Wuille <pieter.wuille@gmail.com>2015-11-08 01:16:45 +0100
committerPieter Wuille <pieter.wuille@gmail.com>2016-06-22 15:42:59 +0200
commit449f9b8debcceb61a92043bc7031528a53627c47 (patch)
treec55434295cae8c338fe8ec128c325fa254303ecb /src/script/script.cpp
parent7030d9eb47254499bba14f1c00abc6bf493efd91 (diff)
BIP141: Witness program
Diffstat (limited to 'src/script/script.cpp')
-rw-r--r--src/script/script.cpp18
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())