All types of Bytes should be available in hex about serde_with

[jonasbb]

I just released a new version of the crate with this fix included. Thanks for implementing the fix.

[jonasbb]

Hi, thanks for the interest.
It seems that serialization already works with the existing Hex type, only deserialization is impossible since there is no [u8; N]: From<Vec<u8>> implementation.

Even disconnected from this issue, it might be worthwhile to see if the DeserializeAs implementation can be changed to something like this, since that would allow TryFrom in addition to all currently existing From implementations.
This also does not work for arrays though, since the TryFrom error does not implement Display.

impl<'de, T, E, FORMAT> DeserializeAs<'de, T> for Hex<FORMAT>
where
    T: TryFrom<Vec<u8>, Error = E>,
    E: Display,
    FORMAT: Format,

Therefore, I think the only way forward is to add another Hex-like type especially for array, a HexArray. Do you want to contribute this? The implementation in hex.rs is quite simple.
If you want to contribute base64 too, I would be happy to accept that too. Implementation wise it shouldn't differ too much from the hex type, except that there are different base64 character sets. But they can always be added later.