export declare const CRYPTO_BOX_PUBLICKEYBYTES = 32;
export declare const CRYPTO_BOX_SECRETKEYBYTES = 32;
export declare const CRYPTO_BOX_MACBYTES = 16;
export declare const CRYPTO_BOX_SEALBYTES: number;
export declare const CRYPTO_BOX_NONCEBYTES = 24;
export declare function cryptoBoxSeal(message: Uint8Array, recipientPk: Uint8Array): Uint8Array;
export declare function cryptoBoxSealOpen(sealed: Uint8Array, recipientPk: Uint8Array, recipientSk: Uint8Array): Uint8Array | null;