dns.he.net mikrotik script

##############Script Settings##################
:local henetkey "XXXXXXXXXXXXXXXXXXXX"
:local henethost "XXXXXXXX.XX"
:local henameserver "ns1.he.net"
:local WANInter "wan"
###############################################
:local IpCurrent [/ip address get [find interface=$WANInter] address];
:for i from=( [:len $IpCurrent] - 1) to=0 do={
  :if ( [:pick $IpCurrent $i] = "/") do={
    :local NewIP [:pick $IpCurrent 0 $i];
    :if ([:resolve $henethost server=$henameserver] != $NewIP) do={
      /tool fetch mode=https url="https://dyn.dns.he.net/nic/update\3Fhostname=$henethost&password=$henetkey&myip=$NewIP"
      :log info "HE DNS Update: $henethost - $NewIP
    }
  }
}