Channel:orders

Before cancelling orders on this channel, authentication is required.

Notes:

request_id: an optional string that the server will send back to the client in error responses.
Server only sends error message if the order cannot be canceled (order is "done" or does exists)
Server does not send a successful response
Instead, client must subscribe (sub) to orders channel to see if the order is "cancel_requested" or not.
- All clients subscribe to this channel will see the created order message.
Client might send many cancel messages to create multiple orders, but the ordering of results are not guarantee.
Client might resend cancel message of the same order.
"cancel requested" does not guarantee order is canceled before matching. See Cancel Order V2 page

// Request
{
  "op": "cancel_order",
  "request_id": "your-unique-id-here",  // optional, should be less than 36 characters (enough for an uuid
  "channel": "orders",
  "data": { // you should only submit one and only one of these field: id, nonce, client_order_id
    "order_id": "a2b876b5-e0fe-4a44-bdca-aec5f5a18350",
    "nonce": "1740589329415243076", // this nonce can be used to detect successful order creatation
    "client_order_id": "your_client_order_id"
  }
}

// example of order cancel message 
// note that this response ONLY be sent when you already "sub" to orders channel before
{
  "channel": "orders",
  "type": "update",
  "data": [
    {
      "avg_price": "0",
      "cancel_reason": "",
      "cancel_reject_reason": "",
      "cancel_requested": true, // "true" indicate the request is success
      "cancel_requested_at": "1740899555396360000", // this field indicates successful request also
      "client_order_id": "",
      "created_at_ts": "1740589955539636000",
      "expired_at": "0",
      "filled_fees": "0",
      "filled_size": "0",
      "id": "4838b931-ddb7-4b8d-be22-bbe2f5b9935a",
      "initial_margin": "6.0064766903749975",
      "is_liquidation": false,
      "last_trades": [],
      "liquidation_fee_rate": "0",
      "maker_fee_rate": "0.0002",
      "nonce": "1740589955129439587",
      "order_stop_type": "STOP_NONE",
      "post_only": false,
      "price": "2399.2",
      "product_id": "ETH-PERP",
      "reduce_only": false,
      "reject_reason": "",
      "scheduled_at": "0",
      "sender": "0xa01f2319baf9e8a344486ebafa96fb3c9f5bda05",
      "side": "BUY",
      "size": "0.05",
      "status": "PENDING",
      "stop_price": "0",
      "stop_price_option": "NONE",
      "stp": "CANCEL_TAKER",
      "taker_fee_rate": "0.0004",
      "time_in_force": "GTC",
      "type": "LIMIT",
      "updated_at": "1740589955539636000"
    }
  ],
  "timestamp": "1740589955539636000"
}

// return when any error happens
{
  "channel": "orders",
  "type": "error",
  "message": "not authenticated",
  "code": 401, // same code with rest api
  "request_id": "your-unique-id-here",
  "payload": {}, // payload is echo back to client for detect the failed order, or client can use request_id
  "nonce": "1740589329415243076"
  }
}