func (s *Store) retrieveAssertion(bs asserts.Backstore, assertType *asserts.AssertionType, primaryKey []string) (asserts.Assertion, error) {
a, err := bs.Get(assertType, primaryKey, assertType.MaxSupportedFormat())
if err == asserts.ErrNotFound && s.assertFallback {
return s.fallback.Assertion(assertType, primaryKey, nil)
}
return a, err
}
func findSnapRevision(snapDigest string, bs asserts.Backstore) (*asserts.SnapRevision, *asserts.Account, error) {
a, err := bs.Get(asserts.SnapRevisionType, []string{snapDigest}, asserts.SnapRevisionType.MaxSupportedFormat())
if err != nil {
return nil, nil, err
}
snapRev := a.(*asserts.SnapRevision)
a, err = bs.Get(asserts.AccountType, []string{snapRev.DeveloperID()}, asserts.AccountType.MaxSupportedFormat())
if err != nil {
return nil, nil, err
}
devAcct := a.(*asserts.Account)
return snapRev, devAcct, nil
}