fn watch_channel(&self, funding_txo: OutPoint, monitor: channelmonitor::ChannelMonitor<EnforcingSigner>) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> {
// At every point where we get a monitor update, we should be able to send a useful monitor
// to a watchtower and disk...
fn watch_channel(&self, funding_txo: OutPoint, monitor: channelmonitor::ChannelMonitor<EnforcingSigner>) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> {
// At every point where we get a monitor update, we should be able to send a useful monitor
// to a watchtower and disk...