Function VerifyTaprootCommitment

src/script/interpreter.cpp:3273–3285

}

static bool VerifyTaprootCommitment(const std::vector<unsigned char>& control, const std::vector<unsigned char>& program, const uint256& tapleaf_hash)
{
    assert(control.size() >= TAPROOT_CONTROL_BASE_SIZE);
    assert(program.size() >= uint256::size());
    //! The internal pubkey (x-only, so no Y coordinate parity).
    const XOnlyPubKey p{Span{control}.subspan(1, TAPROOT_CONTROL_BASE_SIZE - 1)};
    //! The output pubkey (taken from the scriptPubKey).
    const XOnlyPubKey q{program};
    // Compute the Merkle root from the leaf and the provided path.
    const uint256 merkle_root = ComputeTaprootMerkleRoot(control, tapleaf_hash);
    // Verify that the output pubkey matches the tweaked internal pubkey, after correcting for parity.
    return q.CheckTapTweak(p, merkle_root, control[0] & 1);
}

static bool VerifyWitnessProgram(const CScriptWitness& witness, int witversion, const std::vector<unsigned char>& program, unsigned int flags, const BaseSignatureChecker& checker, ScriptError* serror, bool is_p2sh)
{