Apply suggestion from @doitian

Author: doitian

crates/fiber-lib/src/cch/actor.rs

@@ -428,7 +428,9 @@ impl CchState {
         payment_preimage: Option<Hash256>,
         status: CchOutgoingPaymentStatus,
     ) -> Result<()> {
-        // Currently only handle lnd payment events which is for order from fiber to lightning.
+        // When the order is not from fiber to lightning, the payment is sent to fiber. Since Fiber
+        // events are handled in `handle_pending_received_tlc_notification` and
+        // `handle_settled_tlc_notification`, skip the event here.
         if !order.is_from_fiber_to_lightning() {
             return Ok(());
         }