import type { Strategy, Request } from "./";
interface OAUTH2 {
    type: 'OAUTH2';
    redirect_url: string;
}
interface Callback {
    type: 'Callback';
    isSuccess: boolean;
}
type AuthenticateReturn = OAUTH2 | Callback;
export declare const authenticate: (strategy: Strategy) => (req: Request) => Promise<AuthenticateReturn>;
export {};