import { OnModuleInit } from '@nestjs/common';
import { DBDockConfigService } from '../config/config.service';
import { StorageService } from '../storage/storage.service';
import { CryptoService } from '../crypto/crypto.service';
import { CompressionService } from '../backup/compression.service';
import { WalMetadata, WalArchiveOptions, WalArchiveResult } from './wal.types';
import { Readable } from 'stream';
export declare class WalArchiverService implements OnModuleInit {
    private configService;
    private storageService;
    private cryptoService;
    private compressionService;
    private readonly logger;
    private pitrEnabled;
    constructor(configService: DBDockConfigService, storageService: StorageService, cryptoService: CryptoService, compressionService: CompressionService);
    onModuleInit(): Promise<void>;
    private setupWalArchiving;
    archiveWalFile(options: WalArchiveOptions): Promise<WalArchiveResult>;
    private createHashStream;
    private extractTimeline;
    private extractLogSegmentNumber;
    private generateWalStorageKey;
    private saveWalMetadata;
    listWalFiles(timeline?: number): Promise<WalMetadata[]>;
    getWalFile(walFile: string): Promise<Readable>;
    private getWalMetadata;
    cleanupOldWalFiles(retentionDays: number): Promise<number>;
}