NixOS-Config/modules/system/devices/networking/wireguard/pc/default.nix

{ config, pkgs, ... }:
{
  systemd.network = {
    enable = true;
    netdevs = {
      "10-wg0" = {
        netdevConfig = {
          Kind = "wireguard";
          Name = "wg0";
          MTUBytes = 1300;
        };
        wireguardConfig = {
          PrivateKeyFile = pkgs.writeText "privkey" config.secrets.wgClientPriv;
          ListenPort = 9918;
        };
        wireguardPeers = [
          {
            PublicKey = config.secrets.wgServerPub;
            AllowedIPs = [ "0.0.0.0/0" ];
            Endpoint = "sv.${config.secrets.jimDomain}:51820";
          }
        ];
      };
    };
    networks.wg0 = {
      matchConfig.Name = "wg0";
      address = [ "10.100.0.19/24" ];
      dns = [ "1.1.1.1" ];
      gateway = [ "${config.ips.wgSpan}.1" ];
    };
  };
}