Retrieve a fiat order

GET /api/v1/partner/fiat-orders/{orderKey}

curl https://api.niftipay.com/api/v1/partner/fiat-orders/1001 \
  -H "Authorization: Bearer <partner_api_key>"

Partners may only fetch orders they minted; a hit and a miss are indistinguishable (404 not_found) to avoid leaking existence.

Response 200

{
  "request_id": "req-1",
  "api_version": "2026-08-01",
  "data": {
    "fiat_order": {
      "order_key": "1001",
      "status": "new",
      "amount_cents": 1000
    }
  }
}