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Merge d492dc1cda into merged_master (Bitcoin PR bitcoin/bitcoin#24147)

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James Dorfman 2024-07-08 17:49:09 +00:00
commit 94e058d3b7
12 changed files with 2419 additions and 30 deletions
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25
src/script/script.cpp
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@ -458,3 +458,28 @@ bool IsOpSuccess(const opcodetype& opcode)
// ELEMENTS: Tapscript extension from OP_SHA256INITIALIZE(196) till OP_TWEAKVERIFY(228)
(opcode >= 187 && opcode <= 191) || (opcode >= 229 && opcode <= 254);
}
bool CheckMinimalPush(const std::vector<unsigned char>& data, opcodetype opcode) {
// Excludes OP_1NEGATE, OP_1-16 since they are by definition minimal
assert(0 <= opcode && opcode <= OP_PUSHDATA4);
if (data.size() == 0) {
// Should have used OP_0.
return opcode == OP_0;
} else if (data.size() == 1 && data[0] >= 1 && data[0] <= 16) {
// Should have used OP_1 .. OP_16.
return false;
} else if (data.size() == 1 && data[0] == 0x81) {
// Should have used OP_1NEGATE.
return false;
} else if (data.size() <= 75) {
// Must have used a direct push (opcode indicating number of bytes pushed + those bytes).
return opcode == data.size();
} else if (data.size() <= 255) {
// Must have used OP_PUSHDATA.
return opcode == OP_PUSHDATA1;
} else if (data.size() <= 65535) {
// Must have used OP_PUSHDATA2.
return opcode == OP_PUSHDATA2;
}
return true;
}