cd /etc/wireguard
umask 077
wg genkey | tee server.key | wg pubkey > server.pub
config_file="/etc/wireguard/wg0.conf"
cat > "$config_file" <<EOD
[Interface]
Address = 10.100.0.1/24, fd08:4711::1/64
ListenPort = 47111
EOD
echo "PrivateKey = $(cat server.key)" >> "$config_file"


### Add clients:


mkdir -p /etc/wireguard/client-config
function add_client() {
    cd /etc/wireguard
    name="$1"
    wg genkey | tee "client-config/${name}.key" | wg pubkey > "${name}.pub"
    
    wg genpsk > "${name}.psk"
    cp "${name}.psk" "client-config"
    echo "[Peer]" >> /etc/wireguard/wg0.conf
    echo "PublicKey = $(cat "${name}.pub")" >> /etc/wireguard/wg0.conf
    echo "PresharedKey = $(cat "${name}.psk")" >> /etc/wireguard/wg0.conf
    echo "AllowedIPs = 10.100.0.$2/32, fd08:4711::$2/128" >> /etc/wireguard/wg0.conf
    cd -
    cd /etc/wireguard/client-config
    echo "[Interface]" > "${name}.conf"
    echo "Address = 10.100.0.$2/32, fd08:4711::$2/128" >> "${name}.conf" 
    echo "DNS = 10.100.0.1" >> "${name}.conf" 
    echo "PrivateKey = $(cat "${name}.key")" >> "${name}.conf"
    echo >> "${name}.conf" <<EOF
[Peer]
AllowedIPs = 10.100.0.1/32, fd08:4711::1/128
Endpoint = [your public IP or domain]:47111
PersistentKeepalive = 25
EOF
    echo "PublicKey = $(cat ../server.pub)" >> "${name}.conf"
    echo "PresharedKey = $(cat "${name}.psk")" >> "${name}.conf"
    qrencode -t ansiutf8 < "${name}.conf"
    qrencode -t png -o  "${name}.conf.png" < "${name}.conf" 
    cd -
}

add_client "myclient"           "2"