import { ReadTarball } from '@verdaccio/streams';
import { Callback, Config, Logger, Manifest, MergeTags, Version, Versions } from '@verdaccio/types';
import { Token, TokenFilter } from '@verdaccio/types';
import { IPluginFilters, ISyncUplinks, StringValue } from '../types';
import LocalStorage from './local-storage';
import ProxyStorage from './up-storage';
declare class Storage {
    localStorage: LocalStorage;
    config: Config;
    logger: Logger;
    uplinks: Record<string, ProxyStorage>;
    filters: IPluginFilters | undefined;
    constructor(config: Config);
    /**
     * Initialize the storage: load the storage plugin (or the default
     * local storage) and the filter plugins. Safe to call once; subsequent
     * calls only reload missing filters.
     * @param {Config} config verdaccio configuration
     * @param {IPluginFilters} filters preloaded filter plugins; when omitted they are loaded from the configuration
     */
    init(config: Config, filters?: IPluginFilters): Promise<void>;
    /**
     * Resolve the storage backend: a configured storage plugin when available,
     * otherwise the default `@verdaccio/local-storage` on the configured path.
     * @return {Promise<StoragePlugin>} the storage plugin instance
     */
    private loadStorage;
    /**
     * Load the storage plugins declared under `store` in the configuration.
     * Only one storage is supported: with several plugins configured the
     * first loaded one wins and a warning is logged.
     * @return {Promise<StoragePluginLegacy<Config> | undefined>} the selected plugin, or undefined when none is configured
     */
    private loadStorePlugin;
    /**
     * Add a package to the system (publish flow).
     * Verifies the package does not exist locally nor on any uplink before
     * creating it locally; uplinks being offline rejects the publish unless
     * `publish.allow_offline` is enabled.
     * Used storages: local (write) && uplinks
     * @param {String} name package name
     * @param {Object} metadata package manifest to publish
     * @param {Function} callback invoked with an error when the publish is rejected
     */
    addPackage(name: string, metadata: any, callback: any): Promise<void>;
    /**
     * Whether `publish.allow_offline` is enabled in the configuration.
     * @return {Boolean} true when publishing with unreachable uplinks is allowed
     */
    private _isAllowPublishOffline;
    /**
     * Read the npm tokens matching the filter from the token storage.
     * Used storages: local (read)
     */
    readTokens(filter: TokenFilter): Promise<Token[]>;
    /**
     * Save an npm token to the token storage.
     * Used storages: local (write)
     */
    saveToken(token: Token): Promise<void>;
    /**
     * Delete an npm token from the token storage.
     * Used storages: local (write)
     */
    deleteToken(user: string, tokenKey: string): Promise<any>;
    /**
     * Add a new version of a package to the system.
     * Used storages: local (write)
     * @param {String} name package name
     * @param {String} version version id, eg. 1.0.0
     * @param {Version} metadata version metadata
     * @param {String} tag dist-tag pointing to the version
     * @param {Function} callback
     */
    addVersion(name: string, version: string, metadata: Version, tag: StringValue, callback: Callback): void;
    /**
     * Tag package versions with the provided dist-tags.
     * Used storages: local (write)
     * @param {String} name package name
     * @param {MergeTags} tagHash dist-tag to version mapping to merge
     * @param {Function} callback
     */
    mergeTags(name: string, tagHash: MergeTags, callback: Callback): void;
    /**
     * Change an existing package (eg. unpublish one version).
     * Used storages: local (write)
     * @param {String} name package name
     * @param {Manifest} metadata updated package manifest
     * @param {String} revision expected revision of the stored manifest
     * @param {Function} callback
     */
    changePackage(name: string, metadata: Manifest, revision: string, callback: Callback): void;
    /**
     * Remove a package from the local storage and the search indexer.
     * Used storages: local (write)
     * @param {String} name package name
     * @param {Function} callback
     */
    removePackage(name: string, callback: Callback): void;
    /**
     * Remove a tarball from the local storage. The tarball must not be
     * linked by any existing version, ie. the version should be
     * unpublished first.
     * Used storages: local (write)
     * @param {String} name package name
     * @param {String} filename tarball file name
     * @param {String} revision expected revision of the stored manifest
     * @param {Function} callback
     */
    removeTarball(name: string, filename: string, revision: string, callback: Callback): void;
    /**
     * Upload a tarball (publish flow). Synchronous, returns a writable
     * stream the tarball body is piped into.
     * Used storages: local (write)
     * @param {String} name package name
     * @param {String} filename tarball file name
     * @return {Stream} writable upload stream
     */
    addTarball(name: string, filename: string): import("@verdaccio/streams").UploadTarball;
    /**
     * Whether a tarball exists in the local storage, without reading it
     * (the stream is aborted as soon as it opens).
     * Used storages: local (read)
     * @param {String} name package name
     * @param {String} filename tarball file name
     * @return {Promise<Boolean>} true when the tarball is stored locally
     */
    hasLocalTarball(name: string, filename: string): Promise<boolean>;
    /**
     * Get a tarball. Synchronous, returns a readable stream.
     * The tarball is read locally first; on a local miss the distfile record
     * is resolved from the package metadata (see lookupDistFile), syncing the
     * uplinks when the local metadata does not know the file, and the tarball
     * is then fetched from the uplink that serves the distfile url.
     * Used storages: local || uplink (just one)
     * @param {String} name package name
     * @param {String} filename tarball file name
     * @return {Stream} readable tarball stream
     */
    getTarball(name: string, filename: string): ReadTarball;
    /**
     * Retrieve the package metadata: the local manifest merged with the
     * manifest of every uplink with proxy access to the package.
     * Used storages: local && uplink (proxy_access)
     * @param {Object} options
     * @property {String} options.name package name
     * @property {Object} options.req Express `req` object
     * @property {Boolean} options.keepUpLinkData keep the uplink info (last update, etc.) in the package metadata
     * @property {Boolean} options.abbreviated serve the abbreviated manifest (npm install)
     * @property {Function} options.callback invoked with the merged manifest and any uplink errors
     */
    getPackage(options: any): void;
    /**
     * Retrieve remote and local packages more recent than the start key.
     * All uplinks are streamed first, then the local packages; local
     * packages can override registry ones just because they appear in the
     * JSON last — a trade-off made to avoid memory issues.
     * Used storages: local && uplink (proxy_access)
     * @param {String} startkey timestamp to search from
     * @param {Object} options request options; `local=1` in the query skips the uplinks
     * @return {Stream} object stream of search results
     */
    search(startkey: string, options: any): any;
    /**
     * Retrieve only private local packages, as the latest version of each.
     * Used storages: local (read)
     * @param {Function} callback invoked with the list of latest versions
     */
    getLocalDatabase(callback: Callback): void;
    /**
     * Read each local package name, apply filters, and collect the latest version.
     */
    private _collectLocalPackages;
    /**
     * Fetch the package metadata from every uplink with proxy access and
     * synchronize it with the local data; filter plugins are applied to the
     * merged result.
     * @param {String} name package name
     * @param {Manifest} packageInfo local manifest; MUST be provided when the package exists locally
     * @param {ISyncUplinks} options uplink request options
     * @param {Function} callback invoked with (err, mergedManifest, uplinkErrors)
     */
    _syncUplinksMetadata(name: string, packageInfo: Manifest, options: ISyncUplinks, callback: Callback): void;
    /**
     * Apply all configured filter plugins to a package manifest sequentially.
     * Each filter's output is passed as input to the next filter.
     * Returns the filtered manifest and any errors that occurred.
     */
    private _applyFilters;
    /**
     * Check if a tarball should be served based on filter plugins, using only
     * local metadata. Returns true (defer) when the version isn't cached locally
     * — the uplink-sync path in getTarball re-checks filters after sync, which
     * avoids a redundant uplink round-trip and double filter application.
     */
    private _isTarballAllowedByFilters;
    /**
     * Tag each version with the uplink it was fetched from, under a hidden
     * (symbol) key. The local storage uses the tag to record the registry
     * on the distfile records it creates.
     * @param {Versions} versions versions fetched from the uplink
     * @param {ProxyStorage} upLink uplink the versions were fetched from
     */
    _updateVersionsHiddenUpLink(versions: Versions, upLink: ProxyStorage): void;
}
export default Storage;