What is the return type of the function that returns useCallback?

Question

typescript

Given the function below, what type does it return? Thanks in advance.

const useSendMessage = (): ??? => {
  const dispatch = useDispatch();

  return useCallback(
    (id: number, message: Message) => {
      dispatch(Operation.sendMessage(id, message));
    },
    [dispatch]
  );
};

Answer 1

So, just look at what useCallback returns.
Or don't write anything. TS will infer the return type itself

Answer 2

https://github.com/DefinitelyTyped/DefinitelyTyped...
Accordingly, the type will be:
(id: number, message: Message) => void

const useSendMessage = (): (id: number, message: Message) => void => {
  const dispatch = useDispatch();

  return useCallback(
    (id: number, message: Message) => {
      dispatch(Operation.sendMessage(id, message));
    },
    [dispatch]
  );
};