import { inspect } from "node:util";
export interface KisAccessTokenJson {
    access_token: string;
    token_type: string;
    access_token_token_expired: string;
    expires_in: string | number;
}
export declare class KisAccessToken {
    #private;
    readonly expiredAt: Date;
    readonly validityPeriod: number;
    constructor(data: KisAccessTokenJson);
    get expired(): boolean;
    get remainingMs(): number;
    toString(): string;
    toJSON(): Record<string, string | number>;
    [inspect.custom](): string;
    save(path: string): Promise<void>;
    static load(path: string): Promise<KisAccessToken>;
}