hosts/main: add cryptocurrency module

this is one of many services
that I had hosted using docker

hosts/main/cryptocurrency.nix

@@ -0,0 +1,57 @@
+{
+  inputs,
+  ...
+}:
+
+{
+  imports = [
+    "${inputs.nix-bitcoin}/modules/modules.nix"
+  ];
+
+  config = {
+
+    services.bitcoind = {
+      enable = true;
+      listen = true;
+      txindex = true;
+      disablewallet = true;
+      extraConfig = ''
+        coinstatsindex=1
+        maxmempool=2048
+        persistmempool=1
+      '';
+      tor.proxy = true;
+      rpc.address = "0.0.0.0";
+      rpc.allowip = [
+        "10.0.0.0/8"
+        "172.16.0.0/12"
+        "192.168.0.0/16"
+      ];
+    };
+
+    services.electrs = {
+      enable = true;
+    };
+
+    services.monero = {
+      enable = true;
+      extraConfig = ''
+        proxy=127.0.0.1:9050
+        igd=disabled
+      '';
+    };
+
+    services.tor.client.enable = true;
+
+    nix-bitcoin = {
+      onionServices = {
+        bitcoind = {
+          public = true;
+        };
+      };
+      generateSecrets = true;
+      secretsDir = "/var/nix-bitcoin";
+      configVersion = "0.0.121";
+    };
+  };
+}

hosts/main/default.nix

@@ -26,6 +26,8 @@
     ../../nix-os/gnupg.nix
 
     "${inputs.nixos-vscode-server}"
+
+    ./cryptocurrency.nix
   ];
 
   config = {