diff options
Diffstat (limited to 'src/key.h')
| -rw-r--r-- | src/key.h | 13 |
1 files changed, 9 insertions, 4 deletions
@@ -133,10 +133,15 @@ public: * optionally tweaked by *merkle_root. Additional nonce entropy can be provided through * aux. * - * When merkle_root is not nullptr, this results in a signature with a modified key as - * specified in BIP341: - * - If merkle_root->IsNull(): key + H_TapTweak(pubkey)*G - * - Otherwise: key + H_TapTweak(pubkey || *merkle_root) + * merkle_root is used to optionally perform tweaking of the private key, as specified + * in BIP341: + * - If merkle_root == nullptr: no tweaking is done, sign with key directly (this is + * used for signatures in BIP342 script). + * - If merkle_root->IsNull(): sign with key + H_TapTweak(pubkey) (this is used for + * key path spending when no scripts are present). + * - Otherwise: sign with key + H_TapTweak(pubkey || *merkle_root) + * (this is used for key path spending, with specific + * Merkle root of the script tree). */ bool SignSchnorr(const uint256& hash, Span<unsigned char> sig, const uint256* merkle_root = nullptr, const uint256* aux = nullptr) const; |