export declare const TAG = 16;
export declare const encrypt: (key: Uint8Array, nonce: Uint8Array, additional: Uint8Array, plaintext: Uint8Array) => Promise<Uint8Array>;
export declare const decrypt: (key: Uint8Array, nonce: Uint8Array, additional: Uint8Array, ciphertext: Uint8Array) => Promise<Uint8Array | null>;