import * as plugins from '../plugins.js';
import type { IBlobStorageManager } from '@push.rocks/smartmta';
type TBlobBucket = Pick<plugins.smartbucket.Bucket, 'fastExists' | 'fastGet' | 'fastPut' | 'fastRemove' | 'listAllObjects'>;
export interface ISmartMtaBlobStorageConfig {
    storageDescriptor: plugins.tsclass.storage.IStorageDescriptor;
    bucketName: string;
    objectPrefix?: string;
    createBucketIfMissing?: boolean;
}
/**
 * SmartMTA blob persistence backed by a SmartBucket bucket.
 *
 * The adapter accepts only SmartMTA queue, attachment, and retained-message
 * namespaces. Every key remains a SmartBucket object key.
 */
export declare class SmartMtaBlobStorageManager implements IBlobStorageManager {
    private readonly bucketRef;
    private readonly objectPrefix;
    constructor(bucketRef: TBlobBucket, objectPrefix?: string);
    static create(configArg: ISmartMtaBlobStorageConfig): Promise<SmartMtaBlobStorageManager>;
    get(keyArg: string): Promise<Buffer | null>;
    set(keyArg: string, valueArg: Buffer): Promise<void>;
    list(prefixArg: string): Promise<string[]>;
    delete(keyArg: string): Promise<void>;
    private toObjectKey;
}
export {};