/**
 * Encrypts a text using AES-256-GCM algorithm.
 * @param {string} text - The text to encrypt.
 * @param {string} key - The encryption key.
 * @returns {{ encrypted: string; iv: string; authTag: string }} An object containing the encrypted text, initialization vector (iv), and authentication tag (authTag).
 * @example
 * // Returns an object with encrypted text, iv, and authTag
 * encrypt("Hello, World!", "my-secret-key");
 */
export declare function encrypt(text: string, key: string): {
    encrypted: string;
    iv: string;
    authTag: string;
};
/**
 * Decrypts an encrypted text using AES-256-GCM algorithm.
 * @param {string} encrypted - The encrypted text.
 * @param {string} key - The encryption key.
 * @param {string} iv - The initialization vector used during encryption.
 * @param {string} authTag - The authentication tag generated during encryption.
 * @returns {string} The decrypted text.
 * @example
 * // Returns the decrypted text "Hello, World!"
 * const encrypted = encrypt("Hello, World!", "my-secret-key");
 * decrypt(encrypted.encrypted, "my-secret-key", encrypted.iv, encrypted.authTag);
 */
export declare function decrypt(encrypted: string, key: string, iv: string, authTag: string): string;