cancelOrder

The cancelOrder method sends a JSON‑RPC request to cancel a specified order on the node. The endpoint verifies the provided signature and order ID, and returns a boolean indicating whether the cancellation request is valid.

Note: A true response indicates that the cancellation request is valid and accepted by the node; however, it does not guarantee that the order is fully canceled as the cancellation request must propagate through the network. A false response means that the cancellation request is invalid.

Parameters

Parameter	Type	Description
signature	Object	An object containing the signature details, including:
		- y_parity (bool): The parity of the signature.
		- r (U256): The r component of the signature.
		- s (U256): The s component of the signature.
user_address	string	The address of the user initiating the cancellation request.
order_id	string	The unique identifier of the order to cancel.

Result

• bool — Returns true if the cancellation request is valid and accepted by the node, or false if the request is invalid.

Code Sample

 curl "NODE_URL" -X POST -H "Content-Type: application/json" -d '
{
  "jsonrpc": "2.0",
  "id": 0,
  "method": "angstrom_cancelOrder",
  "params": [
    {
        "signature": {
            "y_parity": true,
            "r": 4232450345324523451,
            "s": 234321905834598324753894572,
        },
        "user_address": "0x39f11b34e4702bcfbce388c919e7d77b45b4df94",
        "order_id": "0xdcf4c51c20054616866ad48fb566c12cfb01f24a819a03b7a7c8af7d4dc746c1"
    }
  ]
}
'

Response

{
  "jsonrpc": "2.0",
  "id": "0",
  "result": false // False since signature doesn't match order ID in the request above
}