How to type a function that returns a function with parameters?

Question

typescript

export const getAnalytic = (action: Action) => {
    try {
        const operations = new Operations();
        const analyticsLog = {
            action,
            total: 1,
        };

        return (isSuccess: boolean, param: string = '') =>
            operations .track({
                ...analyticsLog,
                type: param,
                itemsSuccess: Number(isSuccess),
                itemsError: Number(!isSuccess),
            });
    } catch (error) {
        return error;
    }
};

Need to type getAnalytic (it returns a function with parameters)

Answer 1

And what exactly is not typed for you now?
the typescript should display all types here on its own.
If you need some kind of interface, depending on which one.
For example

typeof getAnalytic
ReturType<typeof getAnalytic>