{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "required": [],
  "properties": {
    "id": {
      "type": "string",
      "description": "a short channel id (e.g. 1x2x3) or full 64-byte hex channel id, it will only list htlcs for that channel (which must be known)"
    }
  }
}