/**
 * QR Code encoder (byte mode, ECC level M, versions 1–40). No external deps.
 * Follows ISO/IEC 18004: block interleaving, version info, format info and
 * mask selection by penalty score, so the output is scannable by any reader.
 */
type Matrix = boolean[][];
/** Returns a square boolean matrix (true = dark module). */
export declare function encodeQR(text: string): Matrix;
export declare function qrToSvgPath(matrix: Matrix, cell?: number): string;
/**
 * Clears a centered square so a logo can sit in empty modules
 * instead of covering data. `ratio` is hole size relative to matrix (0–1).
 * Returns a shallow-cloned matrix.
 */
export declare function punchLogoHole(matrix: Matrix, ratio?: number): Matrix;
export {};