? combineLatest([
        combineLatest(eras.map((e) => api.query.staking.erasStakersClipped(e, accountId))),
        combineLatest(eras.map((e) => api.query.staking.erasStakers(e, accountId)))
      ]).pipe(
        map(([clp, exp]): DeriveOwnExposure[] =>