Error handling in Go

Question

I have a function which returns an error. I would like to handle this error on the caller function, so I need to know the reason of the error in the caller function.

Below there is my solution, but I am not sure, that it is ideomatic Go code and would be thankfull for any comments.

Here is the function:

func (e *Engine) returnOrCreateArtist(musicService musicservices.IMusicService, serviceArtistId string) (*core.Artist, error) {

    artist, err := e.DataRepository.ArtistRepository.GetByArtistId(serviceArtistId)
    if err != nil {
        artist, err = musicService.DownloadArtist(serviceArtistId)
        if err != nil {
            return nil, NewDownloadArtistError(err)
        }

        artist, err = e.DataRepository.ArtistRepository.Store(artist)
        if err != nil {
            return nil, NewStoreArtistError(err)
        }
    }

    return artist, nil
}

It can returns errors of two types, so I have created two structs to distinct two types of my error:

type DownloadArtistError struct {
    InnerError error
}

func (e *DownloadArtistError) Error() string {
    return e.InnerError.Error()
}

func NewDownloadArtistError(e error) *DownloadArtistError {
    return &DownloadArtistError{InnerError: e}
}

type StoreArtistError struct {
    InnerError error
}

func (e *StoreArtistError) Error() string {
    return e.InnerError.Error()
}

func NewStoreArtistError(e error) *StoreArtistError {
    return &StoreArtistError{InnerError: e}
}

And here is a part of caller function:

artist, err := e.returnOrCreateArtist(musicService, track.ServiceArtistId)
if err != nil {
     switch e := err.(type) {
         case *DownloadArtistError:
            logger.With(zap.Error(e)).Errorw("не удалось получить исполнителя на музыкальном сервисе",
                "Track.ServiceId", track.TrackId,
                "Track.PlaylistId", track.PlaylistId,
                "Track.ArtistId", track.ServiceArtistId)
         case *StoreArtistError:
            logger.With(zap.Error(err)).Errorw("не удалось сохранить исполнителя",
                "Track.ServiceId", track.TrackId,
                "Track.PlaylistId", track.PlaylistId,
                "Track.ArtistId", track.ServiceArtistId)
            }
        continue
    }