Wireguard new client creation

wireguardClientCreation.sh

#!/bin/bash

MASK=32 # wireguard network mask
DNS="8.8.8.8"
SERVER_IP="<SERVER_IP>"
SERVER_PORT="<SERVER_PORT>" # default is 51820

cd /etc/wireguard/
mkdir -p clients

read -p "> Client name: " clientName
while true; do
    if [[ -n $clientName ]]; then
        if ! test -f clients/$clientName.conf; then
            break
        else
            echo "! Client with name as '$clientName' already exist"
        fi
    else
        echo "! Client name can not be empty"
    fi

    read -p "> Client name: " clientName
done

read -p "> Client IP(for 10.0.0.X): " clientIP
while true; do
    if [[ ! -n ${clientIP//[0-9]/} && clientIP -gt 1 && clientIP -lt 256 ]]; then
        break
    fi

    echo "! Client IP must be integer between 2 and 255"
    read -p "> Client Client IP(for 10.0.0.X): " clientIP
done

read -p "> Server public key: " serverPublicKey

clientPrivateKey="$(wg genkey)"
clientPublicKey="$(echo $clientPrivateKey | wg pubkey)"

CLIENT_CONFIG="# $clientName
[Interface]
PrivateKey = $clientPrivateKey
#PublicKey = $clientPublicKey
Address = 10.0.0.$clientIP/$MASK
DNS = $DNS

[Peer]
PublicKey = $serverPublicKey
AllowedIPs = 0.0.0.0/0, ::/0
Endpoint = $SERVER_IP:$SERVER_PORT
PersistentKeepalive = 20"

echo "$CLIENT_CONFIG" > clients/$clientName.conf

echo "
# $clientName
[Peer]
PublicKey = $clientPublicKey
AllowedIPs = 10.0.0.$clientIP/$MASK" >> wg0.conf

echo "New config:

$CLIENT_CONFIG


Now restart Wireguard service"