curl --request POST \
  --url https://api.shoppex.io/dev/v1/invoices/{uniqid}/complete \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "note": "Completed by external gateway",
  "suppress_emails": false
}
'

{
  "data": {
    "id": "inv_3",
    "uniqid": "33333333-3333-4333-8333-333333333333",
    "type": "PRODUCT",
    "shop_id": "shop_1",
    "customer_email": "[email protected]",
    "currency": "USD",
    "total": 49.99,
    "total_display": 49.99,
    "status": "COMPLETED",
    "status_details": "Completed by Dev API",
    "payment_status": "COMPLETED",
    "gateway": "PANDABASE",
    "items": [
      {
        "product_id": null,
        "product_title": "External Payment",
        "product_type": "SERVICE",
        "variant_title": null,
        "quantity": 1,
        "unit_price": 49.99,
        "total": 49.99,
        "delivered_items": null
      }
    ],
    "created_at": 1712059200,
    "updated_at": 1712059500
  }
}