Webhooks

Pomoću webhooka primate obavijesti u stvarnom vremenu kada se dogode događaji u vašem radnom prostoru — npr. kada se skenira QR kod.

Izrada webhooka

POST /v1/webhooks

{
  "url": "https://example.com/webhooks/qr3",
  "events": ["qr.scanned", "qr.created"],
  "secret": "my-secret-key-min-16-chars"
}

Odgovor

{
  "id": "wh_abc123",
  "url": "https://example.com/webhooks/qr3",
  "events": ["qr.scanned", "qr.created"],
  "is_active": true,
  "secret": "my-secret-key-min-16-chars",
  "secret_hint": "my-s…",
  "created_at": "2026-03-15T10:00:00.000Z"
}

Vrste događaja

Događaj	Opis
`*`	Svi događaji
`qr.created`	QR kod je kreiran
`qr.updated`	QR kod je ažuriran (URL, status, oznake)
`qr.deleted`	QR kod je obrisan
`qr.scanned`	QR kod je skeniran
`qr.flagged`	QR kod je označen kao nesiguran
`scan.created`	Događaj skeniranja (alias za `qr.scanned`)
`workspace.updated`	Radni prostor je ažuriran
`webhook.ping`	Testni ping (putem `/ping` krajnje točke)

Format payload-a

Svi webhook payload-i imaju ovaj format:

{
  "id": "evt_abc123xyz",
  "type": "qr.scanned",
  "created": "2026-03-15T10:00:00.000Z",
  "data": {
    "code_id": "qr_abc123",
    "short_code": "r7f3Kx",
    "scan_id": "scn_xyz",
    "country": "AT",
    "device_type": "mobile",
    "os": "iOS"
  }
}

Verifikacija potpisa

qr3.app potpisuje svaki webhook zahtjev pomoću HMAC-SHA256:

X-QR3-Signature: sha256=a1b2c3d4e5f6...

import crypto from "crypto";

function verifySignature(
  payload: string,
  signature: string,
  secret: string
): boolean {
  const expected = crypto
    .createHmac("sha256", secret)
    .update(payload)
    .digest("hex");
  const received = signature.replace("sha256=", "");
  return crypto.timingSafeEqual(
    Buffer.from(expected, "hex"),
    Buffer.from(received, "hex")
  );
}

// In Express:
app.post("/webhooks/qr3", (req, res) => {
  const signature = req.headers["x-qr3-signature"] as string;
  const valid = verifySignature(
    JSON.stringify(req.body),
    signature,
    process.env.QR3_WEBHOOK_SECRET
  );
  if (!valid) return res.status(401).json({ error: "Invalid signature" });

  const event = req.body;
  console.log(event.type, event.data);
  res.json({ received: true });
});

import hmac
import hashlib

def verify_signature(payload: str, signature: str, secret: str) -> bool:
    expected = hmac.new(
        secret.encode(),
        payload.encode(),
        hashlib.sha256
    ).hexdigest()
    received = signature.removeprefix("sha256=")
    return hmac.compare_digest(expected, received)

Logika ponovnog pokušaja

U slučaju pogrešaka (HTTP >= 300 oder Timeout), qr3.app ponovno pokušava dostavu:

Pokušaj	Odgoda
1	Odmah
2	1 minuta
3	5 minuta

Nakon 10 uzastopnih pogrešaka, webhook se automatski deaktivira.

Zapisi o dostavi

GET /v1/webhooks/:id/deliveries

{
  "data": [
    {
      "id": "whd_abc123",
      "event_type": "qr.scanned",
      "status": "success",
      "status_code": 200,
      "response_time_ms": 145,
      "attempt": 1,
      "created_at": "2026-03-15T10:00:00.000Z"
    }
  ]
}

Testni ping

Odmah testirajte webhook:

POST /v1/webhooks/:id/ping

To šalje webhook.ping događaj na URL vaše krajnje točke.