curl --request POST \
  --url https://flash.definitive.fi/v1/orders/cancel \
  --header 'Content-Type: application/json' \
  --header 'x-definitive-api-key: <api-key>' \
  --data '
{
  "orderIds": [
    "<string>"
  ],
  "cancelMessage": "<string>",
  "userSignature": "<string>"
}
'

import requests

url = "https://flash.definitive.fi/v1/orders/cancel"

payload = {
    "orderIds": ["<string>"],
    "cancelMessage": "<string>",
    "userSignature": "<string>"
}
headers = {
    "x-definitive-api-key": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'x-definitive-api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({orderIds: ['<string>'], cancelMessage: '<string>', userSignature: '<string>'})
};

fetch('https://flash.definitive.fi/v1/orders/cancel', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "results": [
    {
      "orderId": "<string>",
      "ok": true,
      "errorCode": "ALREADY_FILLED"
    }
  ]
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": null
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": null
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": null
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": null
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": null
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": null
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": null
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": null
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": null
  }
}