Quickstart

import { pickReader } from "@endstate-sdk/reader";

const reader = pickReader(); // best available reader, or null
if (!reader) throw new Error("No supported NFC reader in this browser.");

await reader.connect();
await reader.start({
  onTap: ({ url, chipId, e, c }) => {
    if (!chipId || !e) return; // the tag carried a non-Endstate URL
    // Hand { chipId, e, c } to your backend - see below.
  },
  onError: (message) => {
    // Operator-actionable messages: permission denied, unreadable tag, …
  },
});

// Operator UI (browser): tap → hand the identified chip to YOUR backend
onTap: ({ chipId, e, c }) =>
  fetch("/api/pair", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ chipId, e, c, unitId }),
  });

// Your /api/pair handler - secret key stays here.
import { EndstateClient, secretKey } from "@endstate-sdk/core";

const endstate = new EndstateClient({
  apiKey: secretKey(process.env.ENDSTATE_API_KEY),
});

await endstate.chips.pair({ unit_id: unitId, chip_id: chipId, e, c });