+ pub fn get_latest_complete_monitor_update_id(&self) -> u64 {
+ if self.pending_monitor_updates.is_empty() { return self.get_latest_monitor_update_id(); }
+ self.pending_monitor_updates[0].update.update_id - 1
+ }
+
+ /// Returns the next blocked monitor update, if one exists, and a bool which indicates a
+ /// further blocked monitor update exists after the next.
+ pub fn unblock_next_blocked_monitor_update(&mut self) -> Option<(&ChannelMonitorUpdate, bool)> {
+ for i in 0..self.pending_monitor_updates.len() {
+ if self.pending_monitor_updates[i].blocked {
+ self.pending_monitor_updates[i].blocked = false;
+ return Some((&self.pending_monitor_updates[i].update,
+ self.pending_monitor_updates.len() > i + 1));
+ }
+ }
+ None
+ }
+
+ /// Pushes a new monitor update into our monitor update queue, returning whether it should be
+ /// immediately given to the user for persisting or if it should be held as blocked.
+ fn push_blockable_mon_update(&mut self, update: ChannelMonitorUpdate) -> bool {
+ let release_monitor = self.pending_monitor_updates.iter().all(|upd| !upd.blocked);
+ self.pending_monitor_updates.push(PendingChannelMonitorUpdate {
+ update, blocked: !release_monitor
+ });
+ release_monitor
+ }
+
+ /// Pushes a new monitor update into our monitor update queue, returning a reference to it if
+ /// it should be immediately given to the user for persisting or `None` if it should be held as
+ /// blocked.
+ fn push_ret_blockable_mon_update(&mut self, update: ChannelMonitorUpdate)
+ -> Option<&ChannelMonitorUpdate> {
+ let release_monitor = self.push_blockable_mon_update(update);
+ if release_monitor { self.pending_monitor_updates.last().map(|upd| &upd.update) } else { None }
+ }
+
+ pub fn no_monitor_updates_pending(&self) -> bool {
+ self.pending_monitor_updates.is_empty()
+ }
+
+ pub fn complete_all_mon_updates_through(&mut self, update_id: u64) {
+ self.pending_monitor_updates.retain(|upd| {
+ if upd.update.update_id <= update_id {
+ assert!(!upd.blocked, "Completed update must have flown");
+ false
+ } else { true }
+ });
+ }
+
+ pub fn complete_one_mon_update(&mut self, update_id: u64) {
+ self.pending_monitor_updates.retain(|upd| upd.update.update_id != update_id);
+ }
+
+ /// Returns an iterator over all unblocked monitor updates which have not yet completed.
+ pub fn uncompleted_unblocked_mon_updates(&self) -> impl Iterator<Item=&ChannelMonitorUpdate> {
+ self.pending_monitor_updates.iter()
+ .filter_map(|upd| if upd.blocked { None } else { Some(&upd.update) })