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"
    }
  }
}