$source.create_channel($dest.get_our_node_id(), 100_000, 42, 0, None).unwrap();
let open_channel = {
let events = $source.get_and_clear_pending_msg_events();
$source.create_channel($dest.get_our_node_id(), 100_000, 42, 0, None).unwrap();
let open_channel = {
let events = $source.get_and_clear_pending_msg_events();