{ config, lib, pkgs, ... }:
{
  services.syncthing = {
    enable = true;
    relay.enable = false;
    openDefaultPorts = true;
    configDir = "/persist/var/lib/syncthing/";
    dataDir = "/persist/data/syncthing/";
    declarative = {
      devices = {
        schweby = {
          addresses = []; # empty = dynamic
          id = "YF7DNNS-B63GERK-YFQ7G7Q-2DG7557-VIWFOTK-R3JOS63-T76POBQ-F6MO6AH";
        };
        raphael-laptop = {
          addresses = []; # empty = dynamic
          id = "72B3T74-NOMJV3X-EVJXTJF-5GGAEZB-ZDKBHXQ-VQNRYEU-YCPA2JP-L6NGAAG";
        };
        # zauberberg
        conway = {
          addresses = []; # empty = dynamic
          id = "HV7IU2N-Q4W3A7F-BSASR43-OB575SM-47FY2UW-7N5GMFM-PX3LWRN-HXBXMQF";
        };
      };

      folders = {
        "/persist/data/syncthing/hacc/" = {
          id = "qt2ly-xvvvs";
          devices = [ "schweby" "conway" "raphael-laptop"];
          type = "receiveonly";
          versioning = {
            type = "simple";
            params.keep = "10";
          };
        };
      };
    };
  };
}