NixOS wireguard configuration

wireguard.nix

{config, pkgs, ... }:

{
  networking.wireguard.interfaces = {
    wg0 = {
      ips = [ $ADDR1 ];
      peers = [ {
        allowedIPs = [ $ADDR2 ];
        endpoint = $ADDR3;
        publicKey = $KEY1;
      } ];
      privateKey = $KEY2;
      postSetup = [ ''${config.system.path}/bin/echo nameserver $ADDR4 | /run/current-system/sw/bin/resolvconf -a tun.wg0 -m 0 -x'' ];
      postShutdown = [ ''${config.system.path}/bin/resolvconf -d tun.wg0'' ];
    };
  };
}