import { HeadlessFirebaseUser } from '../types/headless-types';
declare type OnIdTokenChangedHeadless = (callback: (user: HeadlessFirebaseUser | null) => void) => () => void;
export declare let onIdTokenChangedHeadless: OnIdTokenChangedHeadless;
declare type SignInWithCustomTokenHeadless = (token: string) => Promise<{
    user: HeadlessFirebaseUser | null;
}>;
export declare let signInWithCustomTokenHeadless: SignInWithCustomTokenHeadless;
export declare let signOutHeadless: () => Promise<void>;
export declare function makeHeadless({ signInWithCustomToken, idTokenListener, signOut, }: {
    signInWithCustomToken: typeof signInWithCustomTokenHeadless;
    idTokenListener: typeof onIdTokenChangedHeadless;
    signOut: typeof signOutHeadless;
}): void;
export {};