import { StorageProvider, StorageFile } from '../../types/Storage.js';
import type { GCSConfig } from '../../types/Config.js';
export declare class GCSStorageProvider implements StorageProvider {
    private storage;
    private bucket;
    private config;
    constructor(config: GCSConfig);
    uploadFile(buffer: Buffer, filename: string, mimeType: string): Promise<StorageFile>;
    downloadFile(fileId: string): Promise<Buffer>;
    deleteFile(fileId: string): Promise<void>;
    getPublicUrl(fileId: string): Promise<string>;
    getSignedUrl(fileId: string, expiresIn: number): Promise<string>;
    listFiles(prefix?: string): Promise<StorageFile[]>;
    private generateKey;
    private getFileType;
    private generateETag;
    getBucket(): string;
    getProjectId(): string;
    getRegion(): string;
}
//# sourceMappingURL=GCSStorage.d.ts.map