Update lib/middlewares/src/metering.rs

Co-authored-by: Simon Warta <[email protected]>

lib/middlewares/src/metering.rs

@@ -60,7 +60,11 @@ pub struct FunctionMetering<F: Fn(&Operator) -> u64 + Copy + Clone + Send + Sync
 
 #[derive(Debug, PartialEq)]
 pub enum MeteringPoints {
+    /// The given number of metering points is left for the execution.
+    /// If the value is 0, all points are consumed and but the execution was not terminated.
     Remaining(u64),
+    /// The execution was terminated because the metering points were exhausted.
+    /// You can recover from this state by setting the points via `set_remaining_points` and restart the execution.
     Exhausted,
 }