campaign.updated

.md

Event POST <your callback URL>

A campaign was scheduled, started sending, paused, resumed, completed or cancelled. Final counts arrive with completed and cancelled; read results with Get campaign.

Verify every callback

Check X-PaalChat-Signature on the raw body, reject timestamps older than 5 minutes, and de-duplicate on X-PaalChat-Delivery. Answer 2xx within 10 seconds. See Webhooks and callbacks.

Headers

X-PaalChat-Event string

X-PaalChat-Delivery string

Unique per event (equals body id). De-duplicate on it.

Format uuid.

X-PaalChat-Signature string

t=<unix seconds>,v1=<hex HMAC-SHA256(secret, "<t>.<raw body>")>. Reject if invalid or older than 300 seconds.

Pattern ^t=\d+,v1=[a-f0-9]{64}$.

Body

id string

Equals X-PaalChat-Delivery.

Format uuid.

sandbox boolean

true for sandbox businesses (test keys) - nothing reached WhatsApp.

event any

Always campaign.updated.

occurred_at string

Format date-time.

business object

external_id string business.external_id

data object

campaign_id integer data.campaign_id

parent_id integer | null data.parent_id

name string data.name

status string data.status

One of: scheduled, sending, paused, completed, cancelled.

counts object | null data.counts

started_at string | null data.started_at

Format date-time.

completed_at string | null data.completed_at

Format date-time.

// routes/api.php: Route::post('/paalchat/callback', PaalChatCallbackController::class); public function __invoke(Request $request) { $header = (string) $request->header('X-PaalChat-Signature'); $raw = $request->getContent(); if (! preg_match('/^t=(\d+),v1=([a-f0-9]{64})$/', $header, $m) || abs(time() - (int) $m[1]) > 300 || ! hash_equals(hash_hmac('sha256', $m[1].'.'.$raw, config('services.paalchat.callback_secret')), $m[2])) { abort(401); } // Process each delivery once. if (! Cache::add('paalchat:'.$request->header('X-PaalChat-Delivery'), true, now()->addDays(2))) { return response()->noContent(); } $event = json_decode($raw, true); if ($event['event'] === 'campaign.updated') { Broadcast::where('paalchat_campaign_id', $event['data']['campaign_id'])->update(['status' => $event['data']['status']]); } return response()->noContent(); }

{ "id": "1d2e3f4a-5b6c-4d7e-8f9a-0b1c2d3e4f5a", "event": "campaign.updated", "occurred_at": "2026-10-06T08:41:10+00:00", "business": {"external_id": "presec"}, "sandbox": false, "data": { "campaign_id": 12, "parent_id": null, "name": "October fee reminders", "status": "completed", "counts": {"audience": 412, "queued": 398, "skipped": 14, "cancelled": 0}, "started_at": "2026-10-06T08:00:01+00:00", "completed_at": "2026-10-06T08:41:10+00:00" } }