/// provide failure information for each MPP part in the payment.
///
/// This event is provided once there are no further pending HTLCs for the payment and the
- /// payment is no longer retryable, either due to a several-block timeout or because
- /// [`ChannelManager::abandon_payment`] was previously called for the corresponding payment.
+ /// payment is no longer retryable due to [`ChannelManager::abandon_payment`] having been
+ /// called for the corresponding payment.
///
/// [`ChannelManager::abandon_payment`]: crate::ln::channelmanager::ChannelManager::abandon_payment
PaymentFailed {
/// Indicates an outbound HTLC we sent failed. Probably some intermediary node dropped
/// something. You may wish to retry with a different route.
///
+ /// If you have given up retrying this payment and wish to fail it, you MUST call
+ /// [`ChannelManager::abandon_payment`] at least once for a given [`PaymentId`] or memory
+ /// related to payment tracking will leak.
+ ///
/// Note that this does *not* indicate that all paths for an MPP payment have failed, see
/// [`Event::PaymentFailed`] and [`all_paths_failed`].
///
+ /// [`ChannelManager::abandon_payment`]: crate::ln::channelmanager::ChannelManager::abandon_payment
/// [`all_paths_failed`]: Self::PaymentPathFailed::all_paths_failed
PaymentPathFailed {
/// The id returned by [`ChannelManager::send_payment`] and used with