nixos-config/nixos/components/network/zerotier.nix

{ lib, config, clanLib, ... }:
let
  machines = clanLib.allMachineNames;
  publicKey = clanLib.readFact "ssh.id_ed25519.pub";
  tld = config.clan.static-hosts.topLevelDomain;

  knownHosts = lib.genAttrs machines
    (machine:
      {
        hostNames = [
          "[${machine}]:2222"
          "[${machine}.${tld}]:2222"
          "[${machine}.private]:2222"
          "${machine}"
          "${machine}.${tld}"
          "${machine}.private"
        ];
        publicKey = publicKey machine;
      }
    );
in
{
  services.openssh.knownHosts = knownHosts;
}