Should libaes API return Result<> ?

[keepsimple1]

Currently libaes APIs do not return Result<>. Instead they return a zero / empty value for error cases. One problem is that, sometimes a valid case could also produce empty value. For example, when the output (clean text) of decrypt could be empty.

The current design was intentional, i.e. avoiding complexity coming with Result<>, such as unwrap(), error type, etc. But I'm wondering if that's still making sense as there have been issues (like this) related to that. Hence this poll.