Your app is built. Now make it print.

Add printing to this app using the BizPrint Print API.

Setup:
- Base URL: https://print.bizswoop.app/api/connect-application/v1
- Store BIZPRINT_PUBLIC_KEY and BIZPRINT_SECRET_KEY as server-side
  environment variables. Never send the secret key to the browser.
  All BizPrint calls must run server-side.

Signing every request:
- POST: add publicKey and time (Unix seconds) to the JSON body, then
  hash = sha256(JSON.stringify(body) + ":" + secretKey) as hex.
  Send the body with hash added. Header: Content-Type: application/json
- GET: add publicKey and time as query parameters, then
  hash = sha256(queryString + ":" + secretKey) as hex, where
  queryString has no leading ?, and add hash as a query parameter.

Endpoints:
- GET /printers lists printers (id, name, status online/offline).
  Add a settings screen where I pick a printer and save its id.
- POST /jobs creates a print job with { printerId (number),
  url (string), description (string) }.
- GET /jobs/{id} returns job status: pending, processing,
  connecting-to-printer, done, or failed.

What to build:
- Create a page that renders [an order ticket / a receipt / a label]
  at its own URL, sized for [80mm receipt paper / 4x6 labels], with
  [the fields you want on it]. Protect it with an unguessable token
  in the URL so BizPrint can fetch it but others can't find it.
- When [a new order is placed / I tap Print], send that URL to
  POST /jobs and show me the job status.

Docs: https://getbizprint.com/documentation/developer/

import { createHash } from "crypto";

const API = "https://print.bizswoop.app/api/connect-application/v1";

export async function print({ printerId, url, description }) {
  const body = {
    printerId,
    url,
    description,
    publicKey: process.env.BIZPRINT_PUBLIC_KEY,
    time: Math.floor(Date.now() / 1000),
  };
  const hash = createHash("sha256")
    .update(`${JSON.stringify(body)}:${process.env.BIZPRINT_SECRET_KEY}`)
    .digest("hex");

  const res = await fetch(`${API}/jobs`, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ ...body, hash }),
  });
  const json = await res.json();
  if (!res.ok) throw new Error(json.message);
  return json.data; // { id, status, printerId, ... }
}