verifactu-sdk API / renderQrPng
Function: renderQrPng()
renderQrPng(
url,opts?):Promise<Buffer<ArrayBufferLike>>
Defined in: src/qr/render.ts:93
Render the QR URL as a PNG buffer.
The output uses the binary PNG signature 89 50 4E 47 and embeds the QR at the requested physical size (default 35 mm at 300 DPI ≈ 413 px).
Parameters
url
string
URL produced by buildQrUrl.
opts?
Optional rendering tweaks; see RenderQrOptions.
Returns
Promise<Buffer<ArrayBufferLike>>
A Buffer whose bytes form a complete PNG image.
Throws
If the URL is too long to fit into a QR at level M (the underlying qrcode library propagates its own error in that case).
Example
ts
const url = buildQrUrl({ ... });
const png = await renderQrPng(url, { sizeMm: 30 });
await Bun.write('invoice-qr.png', png);