/// <reference types="node" />
/**
 * @remarks
 * This package exposes a number of methods that allow access to simple encryption and decryption of strings for storage on the local machine.
 *
 * @experimental
 * @public
 * @packageDocumentation
 */
/**
 * Whether encryption is available.
 *
 * On Linux, returns true if the app has emitted the ready event and the secret key is available.
 * On MacOS, returns true if Keychain is available.
 * On Windows, returns true once the app has emitted the ready event.
 *
 * @public
 */
export declare function isEncryptionAvailable(): Promise<boolean>;
/**
 * Encrypts the string. This function will throw an error if encryption fails.
 *
 * @public
 */
export declare function encryptString(plainText: string): Promise<Buffer>;
/**
 * Decrypts the encrypted buffer obtained with safeStorage.encryptString back into a string.
 *
 * @public
 */
export declare function decryptString(encrypted: Buffer): Promise<string>;