f doc update

Author: valentinewallace

lightning/src/blinded_path/message.rs

@@ -412,10 +412,12 @@ pub enum AsyncPaymentsContext {
 		///
 		/// [`HeldHtlcAvailable`]: crate::onion_message::async_payments::HeldHtlcAvailable
 		nonce: Nonce,
-		/// Authentication code for the [`OfferId`].
+		/// Authentication code for the [`HeldHtlcAvailable`] message.
 		///
-		/// Prevents the recipient from being able to deanonymize us by creating a blinded path to us
-		/// containing the expected [`OfferId`].
+		/// Prevents nodes from creating their own blinded path to us, sending a [`HeldHtlcAvailable`]
+		/// message and trivially getting notified whenever we come online.
+		///
+		/// [`HeldHtlcAvailable`]: crate::onion_message::async_payments::HeldHtlcAvailable
 		hmac: Hmac<Sha256>,
 	},
 }