Function rest_catchup_service_get_catchup_leaf_chain 

async fn rest_catchup_service_get_catchup_leaf_chain<S>(
    __arg0: State<Arc<S>>,
    headers: HeaderMap,
    __arg2: Query<GetCatchupLeafChainRequest>,
) -> Result<Json<CatchupLeafChainResponse>, RestError>
where
    S: CatchupService + Send + Sync + 'static,

GetCatchupLeafChain - JSON endpoint.

GET /v2/catchup/leaf-chain