{ pkgs, lib, config, hostRegistry, zentralwerk, ... }:

let
  host = hostRegistry.hosts.yggdrasil;
  yggAddress = host.ygg;
  yggPrefix = "301:4561:bb58:4dac"; # 301:4561:bb58:4dac::/64
  # taken from the output of "yggdrasilctl getself".
  port = 46823;
in {
  networking.firewall.enable = false;

  services.yggdrasil = {
    enable = true;
    persistentKeys = true;
    config = {
      IfName = "ygg";
      Peers = # https://publicpeers.neilalexander.dev/
        [
          # deutschland
          "tcp://ygg.mkg20001.io:80"

          # czechia
          "tcp://[2a03:3b40:fe:ab::1]:46370" # emery vpsfree.cz

          # nederlands
          "tls://77.249.167.165:8084" # emery nijmegen
        ];
      NodeInfo = {
        # This information is visible to the network.
        name = "y.c3d2.de";
        location = "Dresden";
        email = "ehmry@c3d2.de";
      };
    };
  };

}