f - replace NodeSigner::sign_bolt12_message docs

Author: jkczyz

lightning/src/sign/mod.rs

@@ -624,13 +624,9 @@ pub trait NodeSigner {
 
 	/// Signs a BOLT 12 message.
 	///
-	/// The message is given in `bytes` as a serialized TLV stream with `tag` identifying the
-	/// message type as defined in the BOLT 12 spec's "Signature Calculation" section. The `digest`
-	/// is the tagged merkle root to be signed and can be re-calculated using `tag` and `bytes` if
-	/// blindly signing the digest should be avoided.
+	/// See [`SignFunction`] for details.
 	///
-	/// `metadata` is either the payer or offer metadata, depending on the message type and origin,
-	/// and may be useful in order to derive the signing keys.
+	/// [`SignFunction`]: crate::offers::merkle::SignFunction
 	fn sign_bolt12_message(
 		&self, message: &TaggedBytes, metadata: &[u8]
 	) -> Result<schnorr::Signature, ()>;