fn persist_new_channel(&self, funding_txo: OutPoint,
data: &channelmonitor::ChannelMonitor<Signer>
) -> chain::ChannelMonitorUpdateStatus {
fn persist_new_channel(&self, funding_txo: OutPoint,
data: &channelmonitor::ChannelMonitor<Signer>
) -> chain::ChannelMonitorUpdateStatus {