/**
 * Zero-Width Steganography Utils
 * Invisible data embedding using zero-width Unicode characters.
 *
 * Embed arbitrary BMP-range string data into visible text using zero-width
 * Unicode characters. The embedded data is invisible to humans but trivially
 * recoverable programmatically.
 */
export type EmbedPosition = 'end' | 'after-first-sentence';
export type EmbedOptions = {
    position?: EmbedPosition;
};
declare function hasEmbeddedData(text: string): boolean;
declare function embed(text: string, data: string, options?: EmbedOptions): string;
declare function extract(text: string): string;
declare function extractAll(text: string): string[];
declare function getCleanText(text: string): string;
declare function encodeData(data: string): string;
declare function decodeData(encodedBinary: string): string;
declare const zws: {
    START_MARKER: string;
    ZERO_BIT: string;
    ONE_BIT: string;
    MAX_DATA_LENGTH: number;
    MAX_ENCODED_LENGTH: number;
    hasEmbeddedData: typeof hasEmbeddedData;
    embed: typeof embed;
    extract: typeof extract;
    extractAll: typeof extractAll;
    getCleanText: typeof getCleanText;
    encodeData: typeof encodeData;
    decodeData: typeof decodeData;
};
export default zws;