core-lightning/doc/schemas/fundchannel_cancel.schema.json

{
    "$schema": "http://json-schema.org/draft-07/schema#",
    "type": "object",
    "additionalProperties": false,
    "required": [ "cancelled" ],
    "properties": {
	"cancelled": {
	    "type": "string",
	    "description": "A message indicating it was cancelled by RPC"
	}
    }
}