/**
 * Infrastructure: In-Memory Dead Letter Queue
 * Simple in-memory implementation for testing or low-volume scenarios
 */
import { DeadLetterQueueStats, DLQAddResult, IDeadLetterQueue } from '../../domain/interfaces/IDeadLetterQueue';
import { LogEntry } from '../../domain/entities/LogEntry';
export declare class MemoryDeadLetterQueue implements IDeadLetterQueue {
    private queue;
    private readonly maxSize;
    private droppedEntries;
    constructor(maxSize?: number);
    add(entry: LogEntry, reason: string): Promise<DLQAddResult>;
    addBatch(entries: LogEntry[], reason: string): Promise<DLQAddResult>;
    flush(): Promise<number>;
    size(): number;
    clear(): Promise<void>;
    getEntries(limit?: number): Promise<Array<{
        entry: LogEntry;
        reason: string;
        timestamp: number;
    }>>;
    getStats(): DeadLetterQueueStats;
}
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