/**
 * Zero-dependency QR Code encoder (ISO/IEC 18004).
 *
 * Produces the module matrix for a piece of text — no rendering, no runtime
 * dependency. Supports numeric / alphanumeric / byte segment modes (whichever
 * is most compact for the input), all 40 versions, the four error-correction
 * levels, and automatic data-mask selection by the standard penalty rules.
 *
 * The algorithm follows the reference structure of Project Nayuki's public
 * QR generator (the canonical, spec-faithful design); the code here is an
 * independent TypeScript implementation of the ISO standard.
 */
export type QrEcl = 'L' | 'M' | 'Q' | 'H';
/**
 * Encode `text` into a QR module matrix (`true` = dark). The returned matrix has
 * no quiet zone — the renderer adds it. Throws when the text does not fit any
 * version at the requested ECC level.
 */
export declare function encodeQr(text: string, ecl?: QrEcl, opts?: {
    minVersion?: number;
    maxVersion?: number;
}): boolean[][];