Function build_api 

pub(crate) async fn build_api(
    hoprd_cfg: Value,
    cfg: Api,
    hopr: Arc<Hopr<Arc<HoprBlockchainSafeConnector<BlokliClient>>, SharedChannelGraph, HoprNetwork>>,
    open_listeners: Arc<ListenerJoinHandles>,
    default_listen_host: SocketAddr,
) -> Router