import { BaseFilter } from '.';
import { Config } from '../config';
export declare class MemoryFilter implements BaseFilter {
    private config;
    private lastDayIndex;
    private filters;
    constructor(config?: Config);
    initialize(): Promise<boolean>;
    add(token: string, exp: number): Promise<boolean>;
    has(token: string, exp: number): Promise<boolean>;
    clear(): Promise<boolean>;
    private clearUnused;
}