export type RateLimitWindow = `${number}${'ms' | 's' | 'm' | 'h' | 'd'}`;
export interface IRateLimitDefinition {
    tag: string;
    key: string[];
    limit: number;
    window: RateLimitWindow;
    strategy?: 'fixed' | 'sliding';
    envs?: Record<string, Partial<Pick<IRateLimitDefinition, 'limit' | 'window' | 'strategy'>>>;
}
export interface IRateLimitConsumeInput {
    tag: string;
    env: string;
    values: Record<string, unknown>;
    cost?: number;
}
export interface IRateLimitResult {
    allowed: boolean;
    remaining: number;
    resetAt: string;
    retryAfter: number;
    limit: number;
}
export declare class RateLimitError extends Error {
    code: string;
    retryable: boolean;
    constructor(message: string, code: string, retryable?: boolean);
}
export declare class RateLimitService {
    private redis;
    private definitions;
    constructor(redis: any);
    setRedis(redis: any): void;
    define(d: IRateLimitDefinition): IRateLimitDefinition;
    run(input: IRateLimitConsumeInput): Promise<IRateLimitResult>;
    private sliding;
    private result;
}