let (payment_preimage_1, payment_hash_1, ..) = route_payment(&nodes[0], &[&nodes[1]], 1_000_000);
chanmon_cfgs[1].persister.set_update_ret(ChannelMonitorUpdateStatus::InProgress);
let (payment_preimage_1, payment_hash_1, ..) = route_payment(&nodes[0], &[&nodes[1]], 1_000_000);
chanmon_cfgs[1].persister.set_update_ret(ChannelMonitorUpdateStatus::InProgress);