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Implement Tapscript script validation rules (BIP 342)

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This adds a new `SigVersion::TAPSCRIPT`, makes the necessary interpreter
changes to make it implement BIP342, and uses them for leaf version 0xc0
in Taproot script path spends.
This commit is contained in:
Johnson Lau 2020-09-11 14:34:02 -07:00 • committed by Pieter Wuille
parent 330de894a9
commit 72422ce396
6 changed files with 234 additions and 19 deletions
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11
src/script/script.cpp
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@ -140,6 +140,9 @@ std::string GetOpName(opcodetype opcode)
case OP_NOP9 : return "OP_NOP9";
case OP_NOP10 : return "OP_NOP10";
// Opcode added by BIP 342 (Tapscript)
case OP_CHECKSIGADD : return "OP_CHECKSIGADD";
case OP_INVALIDOPCODE : return "OP_INVALIDOPCODE";
default:
@ -328,3 +331,11 @@ bool GetScriptOp(CScriptBase::const_iterator& pc, CScriptBase::const_iterator en
opcodeRet = static_cast<opcodetype>(opcode);
return true;
}
bool IsOpSuccess(const opcodetype& opcode)
{
return opcode == 80 || opcode == 98 || (opcode >= 126 && opcode <= 129) ||
(opcode >= 131 && opcode <= 134) || (opcode >= 137 && opcode <= 138) ||
(opcode >= 141 && opcode <= 142) || (opcode >= 149 && opcode <= 153) ||
(opcode >= 187 && opcode <= 254);
}