/**
 * @fractary/core - S3 Storage Implementation
 *
 * AWS S3 storage backend for file operations.
 * Uses AWS SDK v3 with lazy loading to avoid hard dependencies.
 */
import { Storage, S3StorageConfig } from './types';
/**
 * AWS S3 storage implementation
 */
export declare class S3Storage implements Storage {
    private config;
    private s3Client;
    constructor(config: S3StorageConfig);
    /**
     * Get or create the S3 client (lazy loaded)
     */
    private getClient;
    /**
     * Get the full S3 key with optional prefix
     */
    private getKey;
    /**
     * Check if an error is a "not found" error
     * AWS SDK v3 uses error.name and error.$metadata.httpStatusCode
     */
    private isNotFoundError;
    /**
     * Write content to S3
     */
    write(id: string, content: string | Buffer): Promise<string>;
    /**
     * Read content from S3
     */
    read(id: string): Promise<string | null>;
    /**
     * Check if object exists in S3
     */
    exists(id: string): Promise<boolean>;
    /**
     * List objects in S3 with optional prefix
     */
    list(prefix?: string): Promise<string[]>;
    /**
     * Delete object from S3
     */
    delete(id: string): Promise<void>;
    /**
     * Get a presigned URL for the object
     */
    getUrl(id: string, expiresIn?: number): Promise<string | null>;
    /**
     * Get the bucket name
     */
    getBucket(): string;
    /**
     * Get the configured prefix
     */
    getPrefix(): string | undefined;
}
//# sourceMappingURL=s3.d.ts.map