+
+
+/** An implementation of Watch */
+public interface WatchInterface {
+ /**Watches a channel identified by `funding_txo` using `monitor`.
+ *
+ * Implementations are responsible for watching the chain for the funding transaction along
+ * with any spends of outputs returned by [`get_outputs_to_watch`]. In practice, this means
+ * calling [`block_connected`] and [`block_disconnected`] on the monitor.
+ *
+ * A return of `Err(())` indicates that the channel should immediately be force-closed without
+ * broadcasting the funding transaction.
+ *
+ * If the given `funding_txo` has previously been registered via `watch_channel`, `Err(())`
+ * must be returned.
+ *
+ * [`get_outputs_to_watch`]: channelmonitor::ChannelMonitor::get_outputs_to_watch
+ * [`block_connected`]: channelmonitor::ChannelMonitor::block_connected
+ * [`block_disconnected`]: channelmonitor::ChannelMonitor::block_disconnected
+ */
+ Result_ChannelMonitorUpdateStatusNoneZ watch_channel(OutPoint funding_txo, ChannelMonitor monitor);
+ /**Updates a channel identified by `funding_txo` by applying `update` to its monitor.
+ *
+ * Implementations must call [`ChannelMonitor::update_monitor`] with the given update. This
+ * may fail (returning an `Err(())`), in which case this should return
+ * [`ChannelMonitorUpdateStatus::InProgress`] (and the update should never complete). This
+ * generally implies the channel has been closed (either by the funding outpoint being spent
+ * on-chain or the [`ChannelMonitor`] having decided to do so and broadcasted a transaction),
+ * and the [`ChannelManager`] state will be updated once it sees the funding spend on-chain.
+ *
+ * In general, persistence failures should be retried after returning
+ * [`ChannelMonitorUpdateStatus::InProgress`] and eventually complete. If a failure truly
+ * cannot be retried, the node should shut down immediately after returning
+ * [`ChannelMonitorUpdateStatus::UnrecoverableError`], see its documentation for more info.
+ *
+ * [`ChannelManager`]: crate::ln::channelmanager::ChannelManager
+ */
+ ChannelMonitorUpdateStatus update_channel(OutPoint funding_txo, ChannelMonitorUpdate update);
+ /**Returns any monitor events since the last call. Subsequent calls must only return new
+ * events.
+ *
+ * Note that after any block- or transaction-connection calls to a [`ChannelMonitor`], no
+ * further events may be returned here until the [`ChannelMonitor`] has been fully persisted
+ * to disk.
+ *
+ * For details on asynchronous [`ChannelMonitor`] updating and returning
+ * [`MonitorEvent::Completed`] here, see [`ChannelMonitorUpdateStatus::InProgress`].
+ */
+ ThreeTuple_OutPointCVec_MonitorEventZPublicKeyZ[] release_pending_monitor_events();
+}
+