1{lib, ...}: {
 2  den.schema.host = {
 3    options = {
 4      address = let
 5        ipvXOptions = ver: {
 6          clearText = lib.mkOption {
 7            description = "Clear text of public IPv${toString ver} address for this host.";
 8            type = lib.types.nullOr lib.types.str;
 9            default = null;
10          };
11          secret = {
12            name = lib.mkOption {
13              description = "Secret name of public IPv${toString ver} address for this host.";
14              type = lib.types.nullOr lib.types.str;
15              default = null;
16            };
17            file = lib.mkOption {
18              description = "Secret file of public IPv${toString ver} address for this host.";
19              type = lib.types.nullOr lib.types.path;
20              default = null;
21            };
22          };
23          tailscale = lib.mkOption {
24            description = "Clear text of tailscale IPv${toString ver} address for this host.";
25            type = lib.types.nullOr lib.types.str;
26            default = null;
27          };
28        };
29      in {
30        ipv4 = ipvXOptions 4;
31        ipv6 = ipvXOptions 6;
32      };
33    };
34  };
35}