export declare function encodeSync(str: string, mode?: number): Uint8Array<ArrayBufferLike>;
export declare function encode(str: string, mode?: number): Promise<Uint8Array<ArrayBufferLike>>;
export declare function decodeSync(stringToDecode: string | Uint8Array): Uint8Array<ArrayBufferLike>;
export declare function decode(stringToDecode: string | Uint8Array): Promise<Uint8Array<ArrayBufferLike>>;