diff --git a/.sops.yaml b/.sops.yaml
index 31d016a..528d294 100644
--- a/.sops.yaml
+++ b/.sops.yaml
@@ -13,6 +13,7 @@ keys:
   - &host_ildkule age1x28hmzvuv6f2n66c0jtqcca3h9rput8d7j5uek6jcpx8n9egd52sqpejq0
   - &host_bekkalokk age12nj59tguy9wg882updc2vjdusx5srnxmjyfaqve4zx6jnnsaw3qsyjq6zd
   - &host_bicep age1sl43gc9cw939z5tgha2lpwf0xxxgcnlw7w4xem4sqgmt2pt264vq0dmwx2
+  - &host_kvernberg age19rlntxt0m27waa0n288g9wgpksa6ndlzz8eneeqya7w3zd7may0sqzhcvz
 
 creation_rules:
   # Global secrets
@@ -78,3 +79,9 @@ creation_rules:
       - *user_pederbs_bjarte
       pgp:
       - *user_oysteikt
+  
+  - path_regex: secrets/kvernberg/[^/]+$
+    key_groups:
+      - age:
+          - *host_kvernberg
+          - *user_danio
diff --git a/flake.lock b/flake.lock
index ff70982..a9b2f64 100644
--- a/flake.lock
+++ b/flake.lock
@@ -119,16 +119,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1731663789,
-        "narHash": "sha256-x07g4NcqGP6mQn6AISXJaks9sQYDjZmTMBlKIvajvyc=",
+        "lastModified": 1731779898,
+        "narHash": "sha256-oxxCrYZM0WNRoaokDyVXcPIlTc8Z2yX4QjKbgXGI3IM=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "035d434d48f4375ac5d3a620954cf5fda7dd7c36",
+        "rev": "9972661139e27eed0237df4dde34839e09028cd5",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-24.05-small",
+        "ref": "refs/pull/332699/merge",
         "repo": "nixpkgs",
         "type": "github"
       }
diff --git a/hosts/kvernberg/configuration.nix b/hosts/kvernberg/configuration.nix
index 446b4a4..c665517 100644
--- a/hosts/kvernberg/configuration.nix
+++ b/hosts/kvernberg/configuration.nix
@@ -5,8 +5,9 @@
     ./hardware-configuration.nix
     (fp /base)
     (fp /misc/metrics-exporters.nix)
-
     ./disks.nix
+
+    ./services/pvvvvvv
   ];
 
   sops.defaultSopsFile = fp /secrets/kvernberg/kvernberg.yaml;
diff --git a/hosts/kvernberg/services/pvvvvvv/default.nix b/hosts/kvernberg/services/pvvvvvv/default.nix
new file mode 100644
index 0000000..ddb1f36
--- /dev/null
+++ b/hosts/kvernberg/services/pvvvvvv/default.nix
@@ -0,0 +1,11 @@
+{
+  imports = [
+    ./exchange.nix
+  ];
+
+  services.taler = {
+    settings = {
+      taler.CURRENCY = "SCHPENN";
+    };
+  };
+}
diff --git a/hosts/kvernberg/services/pvvvvvv/exchange.nix b/hosts/kvernberg/services/pvvvvvv/exchange.nix
new file mode 100644
index 0000000..eee2a33
--- /dev/null
+++ b/hosts/kvernberg/services/pvvvvvv/exchange.nix
@@ -0,0 +1,38 @@
+{ config, lib, fp, pkgs, ... }:
+let
+  cfg = config.services.taler;
+  inherit (cfg.settings.taler) CURRENCY;
+in {
+  sops.secrets.exchange-offline-master = {
+    format = "binary";
+    sopsFile = fp /secrets/kvernberg/exhange-offline-master.priv;
+  };
+
+  services.taler.exchange = {
+    enable = true;
+    debug = true;
+    openFirewall = true;
+    denominationConfig = ''
+      [COIN-${CURRENCY}-k1-1-0]
+      VALUE = ${CURRENCY}:1
+      DURATION_WITHDRAW = 7 days
+      DURATION_SPEND = 1 years
+      DURATION_LEGAL = 3 years
+      FEE_WITHDRAW = ${CURRENCY}:0
+      FEE_DEPOSIT = ${CURRENCY}:0
+      FEE_REFRESH = ${CURRENCY}:0
+      FEE_REFUND = ${CURRENCY}:0
+      RSA_KEYSIZE = 2048
+      CIPHER = RSA
+    '';
+    settings = {
+      exchange = {
+        MASTER_PUBLIC_KEY = "J331T37C8E58P9CVE686P1JFH11DWSRJ3RE4GVDTXKES9M24ERZG";
+        BASE_URL = "http://kvernberg.pvv.ntnu.no:8081/";
+      };
+      exchange-offline = {
+        MASTER_PRIV_FILE = config.sops.secrets.exchange-offline-master.path;
+      };
+    };
+  };
+}
diff --git a/secrets/kvernberg/exhange-offline-master.priv b/secrets/kvernberg/exhange-offline-master.priv
new file mode 100644
index 0000000..25d3197
--- /dev/null
+++ b/secrets/kvernberg/exhange-offline-master.priv
@@ -0,0 +1,24 @@
+{
+	"data": "ENC[AES256_GCM,data:dhVo1B+ZG1B6s0bTLgph4ipPmi0mveaObbJAffDQbpY=,iv:P5plvu4DQYa99cQZQ6B/gEFcSffu3lTY3+Z80Cfoj94=,tag:4xcqCbn6fFSmCbYmmEgQEg==,type:str]",
+	"sops": {
+		"kms": null,
+		"gcp_kms": null,
+		"azure_kv": null,
+		"hc_vault": null,
+		"age": [
+			{
+				"recipient": "age19rlntxt0m27waa0n288g9wgpksa6ndlzz8eneeqya7w3zd7may0sqzhcvz",
+				"enc": "-----BEGIN AGE ENCRYPTED FILE-----\nYWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSA5MzVHSE15Nk9MODQxc2g0\nbHlqNmFKclBYbUNKQTNUOGo0VThiaEZTVzJFCmU2YkYwMXlyeHM3ZzAxOWZpa3k4\nUUJLanVFbkNMa25RcGZmOTBsVmtzazQKLS0tIE1sTTBqT3VJMDFOYXl0T1JvcDRV\nRFpsZGNOZzFzMFc3YzcxeXdIK1d6QUUKzy0n7DJsOmrNvU03Tn6Zcj/l/kAylzzP\nhNnFLXfStdKl3A/qrzBPhTVbYD73yFkZuQ+bDr7/IMsHAmDsztuA9g==\n-----END AGE ENCRYPTED FILE-----\n"
+			},
+			{
+				"recipient": "age17tagmpwqjk3mdy45rfesrfey6h863x8wfq38wh33tkrlrywxducs0k6tpq",
+				"enc": "-----BEGIN AGE ENCRYPTED FILE-----\nYWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBnbEdBWjdEbmtNYWJHQnFj\nSU1yb0NYVG4xVlZkYTdUWUpDcGdmbFF6U1NrCjBlWFZkcC9FMVJLYUtDNlBTUWcw\nNHBwWFNESDBQQmJNb3NDN2tDekM4eUUKLS0tICtMVGc1L2JFQ1BqKzM3eWFPRmRQ\nWXlQUWpvdUdOUlZ1OFhtS0ErL0JKSlUKzxLKbsnXvEqnR2HVsTxNqmM7YPjWfCjG\nZ4Bf046NdseomkNuTvWuPzjzPTe4GvjudMYc4ODchkIMOo6hXyf5kw==\n-----END AGE ENCRYPTED FILE-----\n"
+			}
+		],
+		"lastmodified": "2024-11-17T01:12:23Z",
+		"mac": "ENC[AES256_GCM,data:aXIM/pmgVmfNSa+PwpfK6Efh/kCWXUqZNcKLkyhRwl++vaIBQUIQgQjv09hWHOF77V3ZjRQjh2E1uNe2baBLEmrDT5Au+7VABW+j49KX/vKMd+1l4w47l3DukOVnoo50bsOQFtH+amSl2P2imxpO15sjVDu9/nUeu2qXrtbIUh8=,iv:BQVs3P9p86uzTH2BfuSOxycpE6di4ZIwSz7OTZdcQPg=,tag:mT4Ek8dDbVINGp4Odt62zw==,type:str]",
+		"pgp": null,
+		"unencrypted_suffix": "_unencrypted",
+		"version": "3.9.1"
+	}
+}
\ No newline at end of file