Function rest_catchup_service_get_catchup_reward_account 

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

GetCatchupRewardAccount - JSON endpoint.

GET /v2/catchup/reward-account