import { IPrivateKey, IPrivateKeyExporter } from '../types';
import { IKeyEntryStorage } from './KeyEntryStorage/IKeyEntryStorage';
/**
 * Interface of a single entry in {@link PrivateKeyStorage}.
 */
export interface IPrivateKeyEntry {
    privateKey: IPrivateKey;
    meta?: {
        [key: string]: string;
    };
}
/**
 * Class responsible for storage of private keys.
 */
export declare class PrivateKeyStorage {
    private privateKeyExporter;
    private keyEntryStorage;
    /**
     * Initializes a new instance of `PrivateKeyStorage`.
     * @param {IPrivateKeyExporter} privateKeyExporter - Object responsible for
     * exporting private key bytes from `IPrivateKey` objects and importing
     * private key bytes into `IPrivateKey` objects.
     * @param {IKeyEntryStorage} keyEntryStorage - Object responsible for
     * persistence of private keys data.
     */
    constructor(privateKeyExporter: IPrivateKeyExporter, keyEntryStorage?: IKeyEntryStorage);
    /**
     * Persists the given `privateKey` and `meta` under the given `name`.
     * If an entry with the same name already exists rejects the returned
     * Promise with {@link PrivateKeyExistsError} error.
     *
     * @param {string} name - Name of the private key.
     * @param {IPrivateKey} privateKey - The private key object.
     * @param {Object<string, string>} [meta] - Optional metadata to store with the key.
     *
     * @returns {Promise<void>}
     */
    store(name: string, privateKey: IPrivateKey, meta?: {
        [key: string]: string;
    }): Promise<void>;
    /**
     * Retrieves the private key with the given `name` from persistent storage.
     * If private with the given name does not exist, resolves the returned
     * Promise with `null`.
     *
     * @param {string} name - Name of the private key to load.
     * @returns {Promise<IPrivateKeyEntry|null>}
     */
    load(name: string): Promise<IPrivateKeyEntry | null>;
    /**
     * Removes the private key entry with the given `name` from persistent
     * storage.
     *
     * @param {string} name - Name of the private key to remove.
     * @returns {Promise<void>}
     */
    delete(name: string): Promise<void>;
}