> ## Documentation Index
> Fetch the complete documentation index at: https://docs.pasca.name.ng/llms.txt
> Use this file to discover all available pages before exploring further.

# IRN and QR

> Validate IRNs and generate QR codes

## IRN validation

Use IRN validation to confirm an IRN belongs to the specified business and is structurally valid before you transmit or display it.

## QR code generation

PASCA can generate QR codes from a public key, certificate, and IRN. Use the QR output to embed verification data on invoices.

## Typical flow

1. Validate the IRN with `POST /api/v1/einvoice/irn/validate`.
2. Generate a QR code with `POST /api/v1/einvoice/qr-code/create`.
3. Validate a QR code with `POST /api/v1/einvoice/qr-code/validate`.