modules: move nix-bitcoin options to file 'nix-bitcoin.nix'

This allows modules.nix to consist only of a list of modules.

examples/minimal-configuration.nix

@@ -1,6 +1,6 @@
 { config, pkgs, lib, ... }: {
   imports = [
-    <nix-bitcoin/modules/nix-bitcoin.nix>
+    <nix-bitcoin/modules/modules.nix>
   ];
 
   nix-bitcoin.generateSecrets = true;

modules/modules.nix

@@ -1,9 +1,7 @@
-{ config, pkgs, lib, ... }:
-
-with lib;
 {
   imports = [
     # Core modules
+    ./nix-bitcoin.nix
     ./secrets/secrets.nix
     ./operator.nix
 
@@ -36,56 +34,4 @@ with lib;
   ];
 
   disabledModules = [ "services/networking/bitcoind.nix" ];
-
-  options = {
-    nix-bitcoin = {
-      pkgs = mkOption {
-        type = types.attrs;
-        default = (import ../pkgs { inherit pkgs; }).modulesPkgs;
-      };
-
-      lib = mkOption {
-        readOnly = true;
-        default = import ../pkgs/lib.nix lib pkgs;
-      };
-
-      torClientAddressWithPort = mkOption {
-        readOnly = true;
-        default =  with config.services.tor.client.socksListenAddress;
-          "${addr}:${toString port}";
-      };
-
-      # Torify binary that works with custom Tor SOCKS addresses
-      # Related issue: https://github.com/NixOS/nixpkgs/issues/94236
-      torify = mkOption {
-        readOnly = true;
-        default = pkgs.writeScriptBin "torify" ''
-          ${pkgs.tor}/bin/torify \
-            --address ${config.services.tor.client.socksListenAddress.addr} \
-            "$@"
-        '';
-      };
-
-      # A helper for using doas instead of sudo when doas is enabled
-      runAsUserCmd = mkOption {
-        readOnly = true;
-        default = if config.security.doas.enable
-                  # TODO: Use absolute path until https://github.com/NixOS/nixpkgs/pull/133622 is available.
-                  then "/run/wrappers/bin/doas -u"
-                  else "sudo -u";
-      };
-    };
-  };
-
-  config = {
-    assertions = [
-      { assertion = (config.services.lnd.enable -> ( !config.services.clightning.enable || config.services.clightning.port != config.services.lnd.port));
-        message = ''
-          LND and clightning can't both bind to lightning port 9735. Either
-          disable LND/clightning or change services.clightning.bindPort or
-          services.lnd.port to a port other than 9735.
-        '';
-      }
-    ];
-  };
 }

modules/nix-bitcoin.nix

@@ -1,9 +1,56 @@
-# This file exists only for backwards compatibility
+{ config, pkgs, lib, ... }:
 
-{ lib, ... }:
+with lib;
 {
-   imports = [
+  options = {
-     ./presets/secure-node.nix
+    nix-bitcoin = {
-     (lib.mkRemovedOptionModule [ "services" "nix-bitcoin" "enable" ] "Please directly import ./presets/secure-node.nix")
+      pkgs = mkOption {
-   ];
+        type = types.attrs;
+        default = (import ../pkgs { inherit pkgs; }).modulesPkgs;
+      };
+
+      lib = mkOption {
+        readOnly = true;
+        default = import ../pkgs/lib.nix lib pkgs;
+      };
+
+      torClientAddressWithPort = mkOption {
+        readOnly = true;
+        default =  with config.services.tor.client.socksListenAddress;
+          "${addr}:${toString port}";
+      };
+
+      # Torify binary that works with custom Tor SOCKS addresses
+      # Related issue: https://github.com/NixOS/nixpkgs/issues/94236
+      torify = mkOption {
+        readOnly = true;
+        default = pkgs.writeScriptBin "torify" ''
+          ${pkgs.tor}/bin/torify \
+            --address ${config.services.tor.client.socksListenAddress.addr} \
+            "$@"
+        '';
+      };
+
+      # A helper for using doas instead of sudo when doas is enabled
+      runAsUserCmd = mkOption {
+        readOnly = true;
+        default = if config.security.doas.enable
+                  # TODO: Use absolute path until https://github.com/NixOS/nixpkgs/pull/133622 is available.
+                  then "/run/wrappers/bin/doas -u"
+                  else "sudo -u";
+      };
+    };
+  };
+
+  config = {
+    assertions = [
+      { assertion = (config.services.lnd.enable -> ( !config.services.clightning.enable || config.services.clightning.port != config.services.lnd.port));
+        message = ''
+          LND and clightning can't both bind to lightning port 9735. Either
+          disable LND/clightning or change services.clightning.bindPort or
+          services.lnd.port to a port other than 9735.
+        '';
+      }
+    ];
+  };
 }