import { CookieAttributes } from 'js-cookie';
import { BootstrapData } from '../api/bootstrap';
export interface Traits {
    referrer?: string;
    utmParams?: Record<string, string>;
    email?: string;
    utk?: string;
}
export interface User {
    id?: string | null;
    traits: Traits;
}
export interface UserStoreOptions {
    cookies?: CookieAttributes;
}
export declare function getUserId(): string | undefined;
export declare function getUserEmail(): string | undefined;
export declare function getTraits(): Traits;
export declare class UserStore {
    cookieDefaults: CookieAttributes;
    constructor(options?: UserStoreOptions);
    cookiesAllowed(): boolean;
    id(): string;
    setId(id: string): string;
    setEmail(email?: string): string | undefined;
    email(): string | undefined;
    traits(): Traits;
    upsertTraits(toUpsert: Traits): Traits;
    netNewTraits(toDiff: Traits): Record<string, unknown>;
    userInfo(): User;
    reset(): void;
}
export declare const user: (options?: BootstrapData | undefined) => UserStore;