AutonatDial = object
  peerInfo*: Opt[AutonatPeerInfo]

AutonatDialResponse = object
  status*: ResponseStatus
  text*: Opt[string]
  ma*: Opt[MultiAddress]

AutonatError = object of LPError

AutonatMsg = object
  msgType*: MsgType
  dial*: Opt[AutonatDial]
  response*: Opt[AutonatDialResponse]

AutonatPeerInfo = object
  id*: Opt[PeerId]
  addrs*: seq[MultiAddress]

AutonatUnreachableError = object of LPError

MsgType = enum
  Dial = 0, DialResponse = 1

NetworkReachability {.pure.} = enum
  Unknown, NotReachable, Reachable

ResponseStatus = enum
  Ok = 0, DialError = 100, DialRefused = 101, BadRequest = 200,
  InternalError = 300

AddressLimit = 8

AutonatCodec = "/libp2p/autonat/1.0.0"

proc decode(_: typedesc[AutonatMsg]; buf: seq[byte]): Opt[AutonatMsg] {.
    ...raises: [].}

proc encode(d: AutonatDial): ProtoBuffer {....raises: [], tags: [].}

proc encode(msg: AutonatMsg): ProtoBuffer {....raises: [], tags: [].}

proc encode(r: AutonatDialResponse): ProtoBuffer {....raises: [], tags: [].}