//! Code to remotely notify other crates about changes in the status of the

//! `GuardMgr`.

use std::{pin::Pin, task::Poll};

use crate::skew::SkewEstimate;

use educe::Educe;

use futures::{Stream, StreamExt};

use tor_basic_utils::skip_fmt;

/// A stream of [`SkewEstimate`] events.

///

/// Note that this stream can be lossy: if multiple events trigger before you

/// read from it, you will only get the most recent estimate.

//

// SEMVER NOTE: this type is re-exported from tor-circmgr.

#[educe(Debug)]

pub struct ClockSkewEvents {

    /// The `postage::watch::Receiver` that we're wrapping.

    ///

    /// We wrap this type so that we don't expose its entire API, and so that we

    /// can migrate to some other implementation in the future if we want.

    #[educe(Debug(method = "skip_fmt"))]

    pub(crate) inner: postage::watch::Receiver<Option<SkewEstimate>>,

}

impl Stream for ClockSkewEvents {

    type Item = Option<SkewEstimate>;

}

impl ClockSkewEvents {

    /// Return our best estimate of our current clock skew, based on reports from the

    /// guards and fallbacks we have contacted.

}