On @*:Ban:#:{
  if ($nick == $me) {
    hadd -m $+($chan,.mybans) $banmask $ctime
  }
}

On @*:UnBan:#:{
  if ($hget($+($chan,.mybans),$banmask) && $nick != $me) {
    MODE $chan +b $banmask
  }
  elseif ($nick == $me && $hget($+($chan,.mybans))) {
    hdel $+($chan,.mybans) $banmask
  }
}