curl --request POST \
  --url https://api.openfiskal.com/v1/operations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'Idempotency-Key: <idempotency-key>' \
  --header 'X-OpenFiskal-Merchant: <x-openfiskal-merchant>' \
  --data '
{
  "source": "POS",
  "currency": "USD",
  "pretax_amount": "9.00",
  "tax_amount": "0.95",
  "tip_amount": "0.00",
  "total_amount": "9.95",
  "line_items": [
    {
      "title": "Café Latte",
      "quantity": 2,
      "unit_price": "4.50",
      "total_amount": "9.00",
      "taxes": [
        {
          "name": "State SUT",
          "rate": "0.105",
          "tax_amount": "1.58"
        }
      ]
    }
  ],
  "type": "sale",
  "register_id": "reg_abc123",
  "external_id": "order-12345",
  "related_operation_id": "op_abc123",
  "note": "Customer requested extra napkins"
}
'

{
  "id": "<string>",
  "merchant_id": "<string>",
  "source": "POS",
  "status": "open",
  "currency": "EUR",
  "resource_version": 123,
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z",
  "pretax_amount": "<string>",
  "tax_amount": "<string>",
  "tip_amount": "<string>",
  "total_amount": "<string>",
  "line_items": [
    {
      "id": "<string>",
      "title": "<string>",
      "quantity": 123,
      "unit_price": "<string>",
      "total_amount": "<string>",
      "taxes": [
        {
          "id": "<string>",
          "name": "<string>",
          "rate": "<string>",
          "tax_amount": "<string>"
        }
      ]
    }
  ],
  "payments": [
    {
      "id": "<string>",
      "payment_id": "<string>",
      "method": "<string>",
      "amount": "<string>",
      "currency": "<string>",
      "status": "pending",
      "processor": "<string>",
      "card_brand": "<string>",
      "processor_reference": "<string>",
      "processed_at": "2023-11-07T05:31:56Z"
    }
  ],
  "type": "sale",
  "location_id": "<string>",
  "register_id": "<string>",
  "session_id": "<string>",
  "external_id": "<string>",
  "fiscal_information": {
    "regime": "KassenSichV",
    "document_number": "<string>",
    "document_type": "<string>",
    "tss_serial_number": "<string>",
    "pos_client_serial_number": "<string>",
    "signature_algorithm": "<string>",
    "time_format": "<string>",
    "start_event": {
      "signed_at": "2023-11-07T05:31:56Z"
    },
    "end_event": {
      "signed_at": "2023-11-07T05:31:56Z",
      "transaction_counter": 123,
      "signature": "<string>",
      "public_key": "<string>",
      "process_type": "<string>",
      "process_data": "<string>"
    },
    "verification": {
      "qr_data": "<string>"
    }
  },
  "completed_at": "2023-11-07T05:31:56Z",
  "voided_at": "2023-11-07T05:31:56Z",
  "void_reason": "<string>",
  "note": "<string>"
}