export declare class CryptoUtils {
    /**
     * Encrypts data using AES with the last 32 bytes of the secret
     * @param secret The secret key for encryption
     * @param payload The data to encrypt
     */
    static encrypt(secret: Uint8Array, payload: Uint8Array): Promise<Uint8Array>;
    /**
     * Encrypts a string using AES with the last 32 bytes of the secret
     * @param secret The secret key for encryption
     * @param payload The string to encrypt
     */
    static encryptString(secret: Uint8Array, payload: string): Promise<Uint8Array>;
    /**
     * Decrypts data using AES with the last 32 bytes of the secret
     * @param secret The secret key for decryption
     * @param payload The data to decrypt
     */
    static decrypt(secret: Uint8Array, payload: Uint8Array): Promise<Uint8Array>;
    /**
     * Decrypts data and converts it to a string using AES with the last 32 bytes of the secret
     * @param secret The secret key for decryption
     * @param payload The data to decrypt
     */
    static decryptString(secret: Uint8Array, payload: Uint8Array): Promise<string>;
}