/**
 * Global rate limiter for new IPNS name admissions.
 * Prevents abuse where a malicious client floods the
 * pinner with new names, exhausting capacity.
 *
 * Sliding window: tracks admission timestamps for the
 * last hour and rejects when the count exceeds the
 * configured limit.
 */
export declare const DEFAULT_MAX_NEW_NAMES_PER_HOUR = 100;
export interface NewNameLimiter {
    /** Returns true if a new name can be admitted. */
    tryAdmit(now?: number): boolean;
    /** Current limiter statistics. */
    metrics(): {
        admitted: number;
        rejected: number;
    };
}
export declare function createNewNameLimiter(maxPerHour: number): NewNameLimiter;
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