Function init_with_source 

async fn init_with_source<P>(
    genesis: Genesis,
    params: FollowerParams,
    metrics: Box<dyn Metrics>,
    persistence: P,
    l1_params: L1Params,
    sink: impl DecideSink + 'static,
    replay: Option<Arc<dyn ChainSource>>,
) -> Result<FollowerHandle<P>>
where
    P: SequencerPersistence + MembershipPersistence,
    Arc<P>: Storage<SeqTypes>,