func (s *PublicSfcAPI) GetStakerDelegationsClaimedRewards(ctx context.Context, stakerID hexutil.Uint64) (*hexutil.Big, error) {
    v, err := s.b.GetStakerDelegationsClaimedRewards(ctx, idx.StakerID(stakerID))
    if err != nil {
        return nil, err
    }