core-lightning/doc/schemas/ping.request.json

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "required": [
    "id"
  ],
  "additionalProperties": false,
  "properties": {
    "id": {
      "type": "pubkey"
    },
    "len": {
      "type": "u16"
    },
    "pongbytes": {
      "type": "u16"
    }
  }
}