/**
 * MessageDedupeManager - Message Deduplication Manager
 *
 * Uses in-memory Map to store processed message IDs to avoid duplicate processing.
 * 5-minute time window with automatic cleanup of expired records.
 */
export declare class MessageDedupeManager {
    private processedMessages;
    private readonly TTL;
    private cleanupInterval?;
    constructor();
    /**
     * Check if a message has already been processed
     */
    isDuplicate(key: string): boolean;
    /**
     * Mark a message as processed
     */
    markProcessed(key: string): void;
    /**
     * Start periodic cleanup
     */
    private startCleanup;
    /**
     * Clean up expired records
     */
    private cleanup;
    /**
     * Stop cleanup
     */
    stop(): void;
    /**
     * Clear all records
     */
    clear(): void;
}
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