import type { BootstrapConfig, ConfigStore, SystemConfig } from '@citrineos/base';
import type { ILogObj } from 'tslog';
import { Logger } from 'tslog';
export declare class GcpCloudStorage implements ConfigStore {
    protected readonly _logger: Logger<ILogObj>;
    private storageClient;
    private configBucketName;
    private configFileName;
    constructor(config: BootstrapConfig['fileAccess']['gcp'], configFileName: string, configDir?: string, logger?: Logger<ILogObj>);
    /**
     * Save a raw file buffer into GCS.
     *
     * @param fileName - Object key / blob name.
     * @param content  - File data.
     * @param filePath - Optional bucket name, falls back to configBucketName.
     */
    saveFile(fileName: string, content: Buffer, filePath?: string): Promise<string>;
    /**
     * Read a file from GCS and return its contents as UTF-8 string.
     *
     * @param id       - Object key / blob name.
     * @param filePath - Optional bucket name, falls back to configBucketName.
     */
    getFile(id: string, filePath?: string): Promise<string | undefined>;
    /**
     * Load JSON config from GCS and parse as SystemConfig.
     */
    fetchConfig(): Promise<SystemConfig | null>;
    /**
     * Serialize and save SystemConfig JSON to GCS.
     */
    saveConfig(config: SystemConfig): Promise<void>;
    private getBucket;
    private createBucket;
    /**
     * Normalize "not found" checks across GCS error shapes.
     */
    private isNotFoundError;
}