import { File, FileStorageDriver } from '@proteinjs/db-file';
import { GoogleCloudStorageConfig } from './DefaultGoogleCloudStorageConfigFactory';
/**
 * ERRORS: every operation runs inside {@link GoogleCloudStorageDriver.guarded}, so what leaves this
 * driver on a failure is a `FileStorageError` — a code, a plain message, the HTTP status — and
 * never the storage client's own error. The client's error holds the request it made (`config`,
 * `response.request`, `response.config`), and that request holds this driver's access token in its
 * `Authorization` header: an application that logged the error it caught would write a live
 * credential. A missing object is the `not-found` code on every read and overwrite.
 */
export declare class GoogleCloudStorageDriver implements FileStorageDriver {
    private storage;
    private bucketName;
    private objectPrefix;
    constructor(config?: GoogleCloudStorageConfig);
    createFile(file: File, fileData: string): Promise<void>;
    getFileData(fileId: string): Promise<string>;
    updateFileData(fileId: string, data: string): Promise<void>;
    updateFile(file: File): Promise<void>;
    getSignedUrl(fileId: string, options?: {
        ttlMs?: number;
    }): Promise<string>;
    deleteFile(fileId: string): Promise<void>;
    /**
     * THE one place an object's name is decided (`<objectPrefix><file id>`): every operation
     * addresses its object through here, so a configured prefix holds for all of them or none.
     */
    private object;
    /**
     * THE one door a storage-client call leaves through. Whatever the client throws is replaced by
     * this driver's own error; nothing of the client's error object rides on it.
     */
    private guarded;
    /**
     * Reads exactly three plain facts off the client's error — an HTTP status, a connection error
     * code, its message TEXT — and builds the driver's error from them. The client's error itself,
     * its `config`, `request`, `response` and `errors` are never copied, wrapped or kept as a cause.
     */
    private driverError;
    /** The client reports the HTTP status as its error's `code`; an upload's error carries it as `status` or on its `response`. */
    private httpStatus;
    private getDefaultConfig;
}
//# sourceMappingURL=GoogleCloudStorageDriver.d.ts.map