local constants = require("core.constants")
local M = {}
function M.message(kind, source, target, payload)
  return {
    protocol = constants.PROTOCOL,
    version = constants.PROTOCOL_VERSION,
    type = kind,
    source = source,
    target = target,
    requestId = ("%s-%d-%d"):format(source, os.getComputerID(), os.epoch("utc")),
    timestamp = os.epoch("utc"),
    payload = payload or {},
  }
end
function M.valid(message)
  return type(message) == "table"
    and message.protocol == constants.PROTOCOL
    and message.version == constants.PROTOCOL_VERSION
    and type(message.type) == "string"
end
return M