Possibility to generate typescript definitions with rollup plugin?

I'm not sure if it is possible, but could something like https://github.com/ezolenko/rollup-plugin-typescript2 be used to generate type definition file for typescript users? It would help a lot, since there is no official documentation yet.

Further more, if generated types are accurate, something like https://typedoc.org could be used to auto generate somewhat useful docs with low effort.