/**
 * Minimal QR Code encoder (byte mode, ECC level M).
 * Generates a boolean matrix suitable for SVG rendering. No external deps.
 */
/** Returns a square boolean matrix (true = dark module). */
export declare function encodeQR(text: string): boolean[][];
export declare function qrToSvgPath(matrix: boolean[][], 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: boolean[][], ratio?: number): boolean[][];