Block IP with firewalld

#!/bin/bash
if [ -z $1 ]
then
exit
else
firewall-cmd --permanent --add-rich-rule="rule family='ipv4' source address='$1' reject"
fi

#!/bin/bash

if [ -z $1 ]

then

exit

else

firewall-cmd --permanent --add-rich-rule="rule family='ipv4' source address='$1' reject"