// authorizeCharmStoreEntity acquires and return the charm store delegatable macaroon to be
// used to add the charm corresponding to the given URL.
// The macaroon is properly attenuated so that it can only be used to deploy
// the given charm URL.
func authorizeCharmStoreEntity(csClient *csclient.Client, curl *charm.URL) (*macaroon.Macaroon, error) {
endpoint := "/delegatable-macaroon?id=" + url.QueryEscape(curl.String())
var m *macaroon.Macaroon
if err := csClient.Get(endpoint, &m); err != nil {
return nil, errors.Trace(err)
}
return m, nil
}
