/**
 * Reaction lifecycle manager.
 *
 * Three acts, one arc:
 *   I.   Acknowledge — instant reaction on the user's message
 *   II.  Escalation  — emoji evolves if processing takes time
 *   III. Curtain call — reaction removed when the response arrives
 *
 * Race-condition hardened:
 *   - Rapid messages: old pending is cleared before new one is stored.
 *   - clear() during in-flight acknowledge(): generation counter
 *     prevents stale reactions from being stored.
 *   - clear() during in-flight swap(): generation check after API call
 *     cleans up orphaned reactions.
 *   - Escalation timers are chained, not parallel — the deep-work
 *     timer only starts after the first escalation completes.
 */
import type { LarkReactionClient, AcknowledgeOptions, ReactionsManager } from './types.js';
export declare class ReactionsManagerImpl implements ReactionsManager {
    private readonly client;
    private readonly pending;
    private readonly generation;
    constructor(client: LarkReactionClient);
    acknowledge(chatId: string, messageId: string, text: string, options?: AcknowledgeOptions): Promise<void>;
    clear(chatId: string): Promise<void>;
    dispose(): void;
    private swap;
    private advanceGeneration;
    private deleteReactionQuietly;
    private cancelTimers;
}
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