Cannot figure out how to declare

I don't know whether to post this here or in TypeScript, and it's a request for help (not an issue at all) - but this seems to be an awfully wonky question that only makes sense with your fairly complex typesafety stuff. So here goes..

In short - I have a

class FXRateReducer implements ImmerReducer extends IActions {... }

IActions defines the functions on this class. Because this class includes saga's, and I need to be able to call from one saga to the next by using put. Because of this I want to access the actionCreators on this class.

actions: ActionCreators; // <-- member of FXRateReducer

The above fails to compile because IActions are not derived from ImmerReducerClass. However, if I change that definition to include it:

interface IActions extends ImmerReducerClass

I get the following

TS2420: Class 'FxRateReducer' incorrectly implements interface 'IActions'.
Type 'FxRateReducer' provides no match for the signature 'new (...args: any[]): ImmerReducer'.

Which is very strange, because FXRateReducer was previously passed into createActionCreators, which means it should be a valid template argument. I also can't seem to add this function in, it just seems to be ignored.

I can't seem to get past this point. I would love to have access to type-safe actions from within the FXRateReducer, but seem to be stuck here.

The end goal is to have a parent template class which provides access to actions to all sub-children, and also allows overriding of customName as I need multiple instances of the same reducer type.

Understandable if you don't have time/desire to help; your work is awesome and I appreciate it.