## Waku Message module.
##
## See https://github.com/vacp2p/specs/blob/master/specs/waku/v2/waku-message.md
## for spec.

when (NimMajor, NimMinor) < (1, 4):
  {.push raises: [Defect].}
else:
  {.push raises: [].}

import ../topics, ../time

const MaxMetaAttrLength* = 64 # 64 bytes

type WakuMessage* = object # Data payload transmitted.
  payload*: seq[byte]
  # String identifier that can be used for content-based filtering.
  contentTopic*: ContentTopic
  # Application specific metadata.
  meta*: seq[byte]
  # Number to discriminate different types of payload encryption.
  # Compatibility with Whisper/WakuV1.
  version*: uint32
  # Sender generated timestamp.
  timestamp*: Timestamp
  # The ephemeral attribute indicates signifies the transient nature of the
  # message (if the message should be stored).
  ephemeral*: bool
  # Part of RFC 17: https://rfc.vac.dev/spec/17/
  # The proof attribute indicates that the message is not spam. This
  # attribute will be used in the rln-relay protocol.
  proof*: seq[byte]