{
  "iface": "futoin.ping",
  "version": "1.0",
  "ftn3rev": "1.1",
  "funcs": {
    "ping": {
      "params": {
        "echo": {
          "type": "integer",
          "desc": "Arbitrary integer"
        }
      },
      "result": {
        "echo": {
          "type": "integer",
          "desc": "See params"
        }
      },
      "desc": "Check if peer is accessible"
    }
  },
  "desc": "Ping-pong interface"
}