async fn start_relay_incoming_ack_pipeline<AckIn, T, TEvt>(
ack_incoming: AckIn,
ticket_events: TEvt,
ticket_proc: Arc<T>,
concurrency: usize,
)where
AckIn: Stream<Item = (OffchainPublicKey, Vec<Acknowledgement>)> + Send + 'static,
T: UnacknowledgedTicketProcessor + Sync + Send + 'static,
TEvt: Sink<TicketEvent> + Clone + Unpin + Send + 'static,
TEvt::Error: Error,