/**
 * Minimal in-memory fixed-window rate limiter for the optional HTTP edge.
 *
 * The hosted Glitch facade is the authoritative limiter; this is a cheap
 * additional guard for self-hosted HTTP proxies. Keyed per credential (or IP)
 * so one noisy caller cannot exhaust the process. Disabled when limit <= 0.
 */
export interface RateLimitResult {
    readonly allowed: boolean;
    readonly retryAfterSeconds: number;
}
export interface RateLimiter {
    check(key: string): RateLimitResult;
}
export declare function createFixedWindowRateLimiter(limitPerMinute: number, now?: () => number): RateLimiter;