import { AlertKeyComponents } from './discord-alert.interface';
export declare class RateLimiter {
    private readonly maxAlertsPerMinute;
    private alertCounts;
    private recentAlerts;
    private readonly deduplicationWindow;
    private readonly cleanupInterval;
    private cleanupTimer?;
    constructor(maxAlertsPerMinute?: number);
    canSendAlert(webhookUrl: string): boolean;
    recordAlert(webhookUrl: string): void;
    isDuplicate(alertKey: string): boolean;
    generateAlertKey(components: AlertKeyComponents): string;
    getStats(): {
        totalWebhooks: number;
        totalUniqueAlerts: number;
        webhookStats: Array<{
            webhook: string;
            alertsInLastMinute: number;
            remainingCapacity: number;
        }>;
    };
    private maskWebhookUrl;
    clear(): void;
    private startCleanup;
    private cleanup;
    destroy(): void;
    getDeduplicationWindow(): number;
    getMaxAlertsPerMinute(): number;
    isRateLimited(webhookUrl: string): boolean;
    getRemainingCapacity(webhookUrl: string): number;
}