import type { Message } from '../types/core.js';
declare class CompressionBackup {
    private backup;
    private timestamp;
    storeBackup(messages: Message[]): void;
    getBackup(): Message[] | null;
    hasBackup(): boolean;
    getTimestamp(): number | null;
    clearBackup(): void;
    restore(): Message[] | null;
}
export declare const compressionBackup: CompressionBackup;
export {};
//# sourceMappingURL=compression-backup.d.ts.map