diff options
Diffstat (limited to 'src/script.cpp')
| -rw-r--r-- | src/script.cpp | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/script.cpp b/src/script.cpp index b2d8a67f96..83fc91956c 100644 --- a/src/script.cpp +++ b/src/script.cpp @@ -1881,6 +1881,33 @@ bool CScript::IsPushOnly() const return true; } +bool CScript::HasCanonicalPushes() const +{ + const_iterator pc = begin(); + while (pc < end()) + { + opcodetype opcode; + std::vector<unsigned char> data; + if (!GetOp(pc, opcode, data)) + return false; + if (opcode > OP_16) + continue; + if (opcode < OP_PUSHDATA1 && opcode > OP_0 && (data.size() == 1 && data[0] <= 16)) + // Could have used an OP_n code, rather than a 1-byte push. + return false; + if (opcode == OP_PUSHDATA1 && data.size() < OP_PUSHDATA1) + // Could have used a normal n-byte push, rather than OP_PUSHDATA1. + return false; + if (opcode == OP_PUSHDATA2 && data.size() <= 0xFF) + // Could have used an OP_PUSHDATA1. + return false; + if (opcode == OP_PUSHDATA4 && data.size() <= 0xFFFF) + // Could have used an OP_PUSHDATA2. + return false; + } + return true; +} + class CScriptVisitor : public boost::static_visitor<bool> { private: |