Cancel Single Order

Removes one order from the book by its ID. This endpoint remains operational even when the platform is in cancel-only mode.

Endpoint

DELETE /order

Base URL: https://api.openfish.fun

Authentication

L2 authentication required. All five OPENFISH_* headers must be present.

Request Body

Field	Type	Required	Description
orderID	string	Yes	UUID of the order to cancel (also accepts orderId)

{
  "orderID": "a1b2c3d4-e5f6-7890-abcd-ef1234567890"
}

Response

{
  "canceled": ["a1b2c3d4-e5f6-7890-abcd-ef1234567890"],
  "notCanceled": {}
}

Field	Type	Description
canceled	array of strings	IDs of orders that were successfully removed
notCanceled	object	Mapping from order ID to an error string for any orders that could not be removed

Failed cancellation example

{
  "canceled": [],
  "notCanceled": {
    "a1b2c3d4-e5f6-7890-abcd-ef1234567890": "not found or already canceled"
  }
}

Example

curl -X DELETE https://api.openfish.fun/order \
  -H "Content-Type: application/json" \
  -H "OPENFISH_ADDRESS: 0x..." \
  -H "OPENFISH_SIGNATURE: ..." \
  -H "OPENFISH_TIMESTAMP: 1700000000" \
  -H "OPENFISH_API_KEY: ..." \
  -H "OPENFISH_PASSPHRASE: ..." \
  -d '{"orderID":"a1b2c3d4-e5f6-7890-abcd-ef1234567890"}'