In v1.0.0 we followed the API changes to not wrap base64 for olm messages and use Vec<u8>. However, as per https://github.com/dtolnay/cxx/issues/1699 , there is no way to efficiently append multiple items to this Vec, and users can only push_back() one byte at a time, which is time-consuming. As a workaround, we expose the base64 encode and decode functions to generate the Vec<u8> needed.
Type: add