diff options
Diffstat (limited to 'src/pubkey.cpp')
| -rw-r--r-- | src/pubkey.cpp | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/pubkey.cpp b/src/pubkey.cpp index f78779c182..8382897f95 100644 --- a/src/pubkey.cpp +++ b/src/pubkey.cpp @@ -209,6 +209,24 @@ bool XOnlyPubKey::CheckTapTweak(const XOnlyPubKey& internal, const uint256& merk return secp256k1_xonly_pubkey_tweak_add_check(secp256k1_context_verify, m_keydata.begin(), parity, &internal_key, tweak.begin()); } +std::optional<std::pair<XOnlyPubKey, bool>> XOnlyPubKey::CreateTapTweak(const uint256* merkle_root) const +{ + secp256k1_xonly_pubkey base_point; + if (!secp256k1_xonly_pubkey_parse(secp256k1_context_verify, &base_point, data())) return std::nullopt; + secp256k1_pubkey out; + uint256 tweak = ComputeTapTweakHash(merkle_root); + if (!secp256k1_xonly_pubkey_tweak_add(secp256k1_context_verify, &out, &base_point, tweak.data())) return std::nullopt; + int parity = -1; + std::pair<XOnlyPubKey, bool> ret; + secp256k1_xonly_pubkey out_xonly; + if (!secp256k1_xonly_pubkey_from_pubkey(secp256k1_context_verify, &out_xonly, &parity, &out)) return std::nullopt; + secp256k1_xonly_pubkey_serialize(secp256k1_context_verify, ret.first.begin(), &out_xonly); + assert(parity == 0 || parity == 1); + ret.second = parity; + return ret; +} + + bool CPubKey::Verify(const uint256 &hash, const std::vector<unsigned char>& vchSig) const { if (!IsValid()) return false; |