TypeScriptのd.tsでCommonJSスタイルのエクスポートの型を記述する際に引っかかったこと

type BearerToken = {
    access_token: string;
};

declare class AddOn {}
declare class HostClient {
    getUserBearerToken: (scopes: string[], clientSettings: AddOnFactory.ClientInfo) => Promise<BearerToken>;
}

declare function AddOnFactory(): AddOn;

declare namespace AddOnFactory {
    export type HostClient = InstanceType<typeof HostClient>;
    export interface ClientInfo {
        key: string
    }
    export type AddOn = InstanceType<typeof AddOn>;
    export type AddOnFactory = typeof AddOnFactory;
    export { BearerToken };
}

export = AddOnFactory;

import ace = require('atlassian-connect-express');
import { HostClient, ClientInfo, AddOn, AddOnFactory, BearerToken } from 'atlassian-connect-express';