stage 5-6

lib/qr.ts

@@ -37,3 +37,16 @@ export async function renderQrPng(token: string): Promise<string> {
     width: 256,
   });
 }
+
+/**
+ * Same QR, but as a raw PNG buffer for embedding into pdf-lib documents.
+ * We bump width up so the vector→raster downscale at print time stays crisp;
+ * 512 px at 35 mm = ~370 dpi which beats any office printer we'll see.
+ */
+export async function renderQrPngBuffer(token: string, width = 512): Promise<Buffer> {
+  return QRCode.toBuffer(scanUrlForToken(token), {
+    errorCorrectionLevel: "M",
+    margin: 1,
+    width,
+  });
+}