Add ping support

Adjust test scripts for current database versions
Update dependencies
2026-08-31 19:03:45 +02:00 · 2026-03-23 01:00:00 +01:00 · 2026-03-23 01:00:00 +01:00 · 2026-03-23 01:00:00 +01:00 · 2026-03-16 01:00:00 +01:00 · 2026-02-16 01:00:00 +01:00
44 changed files with 2875 additions and 2878 deletions
@@ -1,3 +0,0 @@
-node_modules
-build
-scripts
@@ -1,14 +0,0 @@
-module.exports = {
-  root: true,
-  parser: '@typescript-eslint/parser',
-  plugins: [
-    '@typescript-eslint',
-  ],
-  extends: [
-    'eslint:recommended',
-    'plugin:@typescript-eslint/recommended',
-  ],
-  env: {
-    node: true
-  }
-};
@@ -1,4 +1,4 @@
-FROM node:16-alpine
+FROM node:24-alpine

 # Create app directories
 RUN mkdir -p /usr/src/app
@@ -96,10 +96,11 @@ Use this to unlock all features for one user for a specified duration.

 ### request

-request properties: ``purchaseToken`` and ``purchaseId``
+request properties: ``purchaseToken``, ``purchaseId`` and ``dryRun``

 - ``purchasetoken`` is a string which the client shows at the purchase screen
 - ``purchaseId`` is the ID that is used at the bill
+- ``dryRun`` is a boolean; setting true will skip the actual unlocking

 ### response

@@ -130,6 +130,8 @@

 * [SerializedMarkTaskPendingAction](./serializedapplogicaction-definitions-serializedmarktaskpendingaction.md) – `https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedMarkTaskPendingAction`

+* [SerializedPingAction](./serializedapplogicaction-definitions-serializedpingaction.md) – `https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction`
+
 * [SerializedRemoveCategoryAppsAction](./serializedparentaction-definitions-serializedremovecategoryappsaction.md) – `https://timelimit.io/SerializedParentAction#/definitions/SerializedRemoveCategoryAppsAction`

 * [SerializedRemoveInstalledAppsAction](./serializedapplogicaction-definitions-serializedremoveinstalledappsaction.md) – `https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedRemoveInstalledAppsAction`
@@ -238,6 +240,8 @@

 * [ServerKeyResponse](./serverdatastatus-definitions-serverkeyresponse.md) – `https://timelimit.io/ServerDataStatus#/definitions/ServerKeyResponse`

+* [ServerPing](./serverdatastatus-definitions-serverping.md) – `https://timelimit.io/ServerDataStatus#/definitions/ServerPing`
+
 * [ServerSessionDurationItem](./serverdatastatus-definitions-serversessiondurationitem.md) – `https://timelimit.io/ServerDataStatus#/definitions/ServerSessionDurationItem`

 * [ServerTimeLimitRule](./serverdatastatus-definitions-servertimelimitrule.md) – `https://timelimit.io/ServerDataStatus#/definitions/ServerTimeLimitRule`
@@ -346,6 +350,8 @@

 * [Untitled array in ServerDataStatus](./serverdatastatus-properties-kr.md) – `https://timelimit.io/ServerDataStatus#/properties/kr`

+* [Untitled array in ServerDataStatus](./serverdatastatus-properties-pings.md) – `https://timelimit.io/ServerDataStatus#/properties/pings`
+
 * [Untitled array in ServerDataStatus](./serverdatastatus-definitions-u2fdata-properties-d.md) – `https://timelimit.io/ServerDataStatus#/definitions/U2fData/properties/d`

 ## Version Note
@@ -21,6 +21,9 @@
    {
      "$ref": "#/definitions/SerializedMarkTaskPendingAction"
    },
+    {
+      "$ref": "#/definitions/SerializedPingAction"
+    },
    {
      "$ref": "#/definitions/SerializedUpdateInstalledAppsAction"
    },
@@ -309,6 +312,43 @@
      ],
      "title": "SerializedMarkTaskPendingAction"
    },
+    "SerializedPingAction": {
+      "type": "object",
+      "properties": {
+        "type": {
+          "type": "string",
+          "enum": [
+            "PING"
+          ]
+        },
+        "deviceId": {
+          "type": "string"
+        },
+        "event": {
+          "$ref": "#/definitions/PingEvent"
+        },
+        "token": {
+          "type": "string"
+        }
+      },
+      "additionalProperties": false,
+      "required": [
+        "deviceId",
+        "event",
+        "token",
+        "type"
+      ],
+      "title": "SerializedPingAction"
+    },
+    "PingEvent": {
+      "enum": [
+        "clear",
+        "ping",
+        "pong"
+      ],
+      "type": "string",
+      "title": "PingEvent"
+    },
    "SerializedUpdateInstalledAppsAction": {
      "type": "object",
      "properties": {
@@ -67,6 +67,12 @@
        "$ref": "#/definitions/ServerKeyResponse"
      }
    },
+    "pings": {
+      "type": "array",
+      "items": {
+        "$ref": "#/definitions/ServerPing"
+      }
+    },
    "dh": {
      "$ref": "#/definitions/ServerDhKey"
    },
@@ -927,6 +933,31 @@
      ],
      "title": "ServerKeyResponse"
    },
+    "ServerPing": {
+      "type": "object",
+      "properties": {
+        "deviceId": {
+          "type": "string"
+        },
+        "token": {
+          "type": "string"
+        },
+        "type": {
+          "enum": [
+            "ping",
+            "pong"
+          ],
+          "type": "string"
+        }
+      },
+      "additionalProperties": false,
+      "required": [
+        "deviceId",
+        "token",
+        "type"
+      ],
+      "title": "ServerPing"
+    },
    "ServerDhKey": {
      "type": "object",
      "properties": {
@@ -0,0 +1,25 @@
+# PingEvent Schema
+
+```txt
+https://timelimit.io/SerializedAppLogicAction#/definitions/PingEvent
+```
+
+
+
+| Abstract            | Extensible | Status         | Identifiable            | Custom Properties | Additional Properties | Access Restrictions | Defined In                                                                                            |
+| :------------------ | :--------- | :------------- | :---------------------- | :---------------- | :-------------------- | :------------------ | :---------------------------------------------------------------------------------------------------- |
+| Can be instantiated | No         | Unknown status | Unknown identifiability | Forbidden         | Allowed               | none                | [SerializedAppLogicAction.schema.json\*](SerializedAppLogicAction.schema.json "open original schema") |
+
+## PingEvent Type
+
+`string` ([PingEvent](serializedapplogicaction-definitions-pingevent.md))
+
+## PingEvent Constraints
+
+**enum**: the value of this property must be equal to one of the following values:
+
+| Value     | Explanation |
+| :-------- | :---------- |
+| `"clear"` |             |
+| `"ping"`  |             |
+| `"pong"`  |             |
@@ -0,0 +1,15 @@
+# Untitled string in SerializedAppLogicAction Schema
+
+```txt
+https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction/properties/deviceId
+```
+
+
+
+| Abstract            | Extensible | Status         | Identifiable            | Custom Properties | Additional Properties | Access Restrictions | Defined In                                                                                            |
+| :------------------ | :--------- | :------------- | :---------------------- | :---------------- | :-------------------- | :------------------ | :---------------------------------------------------------------------------------------------------- |
+| Can be instantiated | No         | Unknown status | Unknown identifiability | Forbidden         | Allowed               | none                | [SerializedAppLogicAction.schema.json\*](SerializedAppLogicAction.schema.json "open original schema") |
+
+## deviceId Type
+
+`string`
@@ -0,0 +1,25 @@
+# PingEvent Schema
+
+```txt
+https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction/properties/event
+```
+
+
+
+| Abstract            | Extensible | Status         | Identifiable            | Custom Properties | Additional Properties | Access Restrictions | Defined In                                                                                            |
+| :------------------ | :--------- | :------------- | :---------------------- | :---------------- | :-------------------- | :------------------ | :---------------------------------------------------------------------------------------------------- |
+| Can be instantiated | No         | Unknown status | Unknown identifiability | Forbidden         | Allowed               | none                | [SerializedAppLogicAction.schema.json\*](SerializedAppLogicAction.schema.json "open original schema") |
+
+## event Type
+
+`string` ([PingEvent](serializedapplogicaction-definitions-serializedpingaction-properties-pingevent.md))
+
+## event Constraints
+
+**enum**: the value of this property must be equal to one of the following values:
+
+| Value     | Explanation |
+| :-------- | :---------- |
+| `"clear"` |             |
+| `"ping"`  |             |
+| `"pong"`  |             |
@@ -0,0 +1,15 @@
+# Untitled string in SerializedAppLogicAction Schema
+
+```txt
+https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction/properties/token
+```
+
+
+
+| Abstract            | Extensible | Status         | Identifiable            | Custom Properties | Additional Properties | Access Restrictions | Defined In                                                                                            |
+| :------------------ | :--------- | :------------- | :---------------------- | :---------------- | :-------------------- | :------------------ | :---------------------------------------------------------------------------------------------------- |
+| Can be instantiated | No         | Unknown status | Unknown identifiability | Forbidden         | Allowed               | none                | [SerializedAppLogicAction.schema.json\*](SerializedAppLogicAction.schema.json "open original schema") |
+
+## token Type
+
+`string`
@@ -0,0 +1,23 @@
+# Untitled string in SerializedAppLogicAction Schema
+
+```txt
+https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction/properties/type
+```
+
+
+
+| Abstract            | Extensible | Status         | Identifiable            | Custom Properties | Additional Properties | Access Restrictions | Defined In                                                                                            |
+| :------------------ | :--------- | :------------- | :---------------------- | :---------------- | :-------------------- | :------------------ | :---------------------------------------------------------------------------------------------------- |
+| Can be instantiated | No         | Unknown status | Unknown identifiability | Forbidden         | Allowed               | none                | [SerializedAppLogicAction.schema.json\*](SerializedAppLogicAction.schema.json "open original schema") |
+
+## type Type
+
+`string`
+
+## type Constraints
+
+**enum**: the value of this property must be equal to one of the following values:
+
+| Value    | Explanation |
+| :------- | :---------- |
+| `"PING"` |             |
@@ -0,0 +1,114 @@
+# SerializedPingAction Schema
+
+```txt
+https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction
+```
+
+
+
+| Abstract            | Extensible | Status         | Identifiable | Custom Properties | Additional Properties | Access Restrictions | Defined In                                                                                            |
+| :------------------ | :--------- | :------------- | :----------- | :---------------- | :-------------------- | :------------------ | :---------------------------------------------------------------------------------------------------- |
+| Can be instantiated | No         | Unknown status | No           | Forbidden         | Forbidden             | none                | [SerializedAppLogicAction.schema.json\*](SerializedAppLogicAction.schema.json "open original schema") |
+
+## SerializedPingAction Type
+
+`object` ([SerializedPingAction](serializedapplogicaction-definitions-serializedpingaction.md))
+
+# SerializedPingAction Properties
+
+| Property              | Type     | Required | Nullable       | Defined by                                                                                                                                                                                                         |
+| :-------------------- | :------- | :------- | :------------- | :----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| [type](#type)         | `string` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedpingaction-properties-type.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction/properties/type")         |
+| [deviceId](#deviceid) | `string` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedpingaction-properties-deviceid.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction/properties/deviceId") |
+| [event](#event)       | `string` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedpingaction-properties-pingevent.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction/properties/event")   |
+| [token](#token)       | `string` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedpingaction-properties-token.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction/properties/token")       |
+
+## type
+
+
+
+`type`
+
+* is required
+
+* Type: `string`
+
+* cannot be null
+
+* defined in: [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedpingaction-properties-type.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction/properties/type")
+
+### type Type
+
+`string`
+
+### type Constraints
+
+**enum**: the value of this property must be equal to one of the following values:
+
+| Value    | Explanation |
+| :------- | :---------- |
+| `"PING"` |             |
+
+## deviceId
+
+
+
+`deviceId`
+
+* is required
+
+* Type: `string`
+
+* cannot be null
+
+* defined in: [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedpingaction-properties-deviceid.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction/properties/deviceId")
+
+### deviceId Type
+
+`string`
+
+## event
+
+
+
+`event`
+
+* is required
+
+* Type: `string` ([PingEvent](serializedapplogicaction-definitions-serializedpingaction-properties-pingevent.md))
+
+* cannot be null
+
+* defined in: [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedpingaction-properties-pingevent.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction/properties/event")
+
+### event Type
+
+`string` ([PingEvent](serializedapplogicaction-definitions-serializedpingaction-properties-pingevent.md))
+
+### event Constraints
+
+**enum**: the value of this property must be equal to one of the following values:
+
+| Value     | Explanation |
+| :-------- | :---------- |
+| `"clear"` |             |
+| `"ping"`  |             |
+| `"pong"`  |             |
+
+## token
+
+
+
+`token`
+
+* is required
+
+* Type: `string`
+
+* cannot be null
+
+* defined in: [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedpingaction-properties-token.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction/properties/token")
+
+### token Type
+
+`string`
@@ -30,6 +30,8 @@ any of

 * [SerializedMarkTaskPendingAction](serializedapplogicaction-definitions-serializedmarktaskpendingaction.md "check type definition")

+* [SerializedPingAction](serializedapplogicaction-definitions-serializedpingaction.md "check type definition")
+
 * [SerializedUpdateInstalledAppsAction](serializedapplogicaction-definitions-serializedupdateinstalledappsaction.md "check type definition")

 * [SerializedRemoveInstalledAppsAction](serializedapplogicaction-definitions-serializedremoveinstalledappsaction.md "check type definition")
@@ -688,6 +690,122 @@ Reference this group by using

 `string`

+## Definitions group SerializedPingAction
+
+Reference this group by using
+
+```json
+{"$ref":"https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction"}
+```
+
+| Property              | Type     | Required | Nullable       | Defined by                                                                                                                                                                                                         |
+| :-------------------- | :------- | :------- | :------------- | :----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| [type](#type-7)       | `string` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedpingaction-properties-type.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction/properties/type")         |
+| [deviceId](#deviceid) | `string` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedpingaction-properties-deviceid.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction/properties/deviceId") |
+| [event](#event)       | `string` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedpingaction-properties-pingevent.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction/properties/event")   |
+| [token](#token)       | `string` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedpingaction-properties-token.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction/properties/token")       |
+
+### type
+
+
+
+`type`
+
+* is required
+
+* Type: `string`
+
+* cannot be null
+
+* defined in: [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedpingaction-properties-type.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction/properties/type")
+
+#### type Type
+
+`string`
+
+#### type Constraints
+
+**enum**: the value of this property must be equal to one of the following values:
+
+| Value    | Explanation |
+| :------- | :---------- |
+| `"PING"` |             |
+
+### deviceId
+
+
+
+`deviceId`
+
+* is required
+
+* Type: `string`
+
+* cannot be null
+
+* defined in: [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedpingaction-properties-deviceid.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction/properties/deviceId")
+
+#### deviceId Type
+
+`string`
+
+### event
+
+
+
+`event`
+
+* is required
+
+* Type: `string` ([PingEvent](serializedapplogicaction-definitions-serializedpingaction-properties-pingevent.md))
+
+* cannot be null
+
+* defined in: [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedpingaction-properties-pingevent.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction/properties/event")
+
+#### event Type
+
+`string` ([PingEvent](serializedapplogicaction-definitions-serializedpingaction-properties-pingevent.md))
+
+#### event Constraints
+
+**enum**: the value of this property must be equal to one of the following values:
+
+| Value     | Explanation |
+| :-------- | :---------- |
+| `"clear"` |             |
+| `"ping"`  |             |
+| `"pong"`  |             |
+
+### token
+
+
+
+`token`
+
+* is required
+
+* Type: `string`
+
+* cannot be null
+
+* defined in: [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedpingaction-properties-token.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedPingAction/properties/token")
+
+#### token Type
+
+`string`
+
+## Definitions group PingEvent
+
+Reference this group by using
+
+```json
+{"$ref":"https://timelimit.io/SerializedAppLogicAction#/definitions/PingEvent"}
+```
+
+| Property | Type | Required | Nullable | Defined by |
+| :------- | :--- | :------- | :------- | :--------- |
+
 ## Definitions group SerializedUpdateInstalledAppsAction

 Reference this group by using
@@ -698,7 +816,7 @@ Reference this group by using

 | Property        | Type      | Required | Nullable       | Defined by                                                                                                                                                                                                                               |
 | :-------------- | :-------- | :------- | :------------- | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| [type](#type-7) | `string`  | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedupdateinstalledappsaction-properties-type.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedUpdateInstalledAppsAction/properties/type") |
+| [type](#type-8) | `string`  | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedupdateinstalledappsaction-properties-type.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedUpdateInstalledAppsAction/properties/type") |
 | [b](#b)         | `string`  | Optional | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedupdateinstalledappsaction-properties-b.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedUpdateInstalledAppsAction/properties/b")       |
 | [d](#d-1)       | `string`  | Optional | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedupdateinstalledappsaction-properties-d.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedUpdateInstalledAppsAction/properties/d")       |
 | [w](#w)         | `boolean` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedupdateinstalledappsaction-properties-w.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedUpdateInstalledAppsAction/properties/w")       |
@@ -793,7 +911,7 @@ Reference this group by using

 | Property                      | Type     | Required | Nullable       | Defined by                                                                                                                                                                                                                                               |
 | :---------------------------- | :------- | :------- | :------------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| [type](#type-8)               | `string` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedremoveinstalledappsaction-properties-type.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedRemoveInstalledAppsAction/properties/type")                 |
+| [type](#type-9)               | `string` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedremoveinstalledappsaction-properties-type.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedRemoveInstalledAppsAction/properties/type")                 |
 | [packageNames](#packagenames) | `array`  | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedremoveinstalledappsaction-properties-packagenames.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedRemoveInstalledAppsAction/properties/packageNames") |

 ### type
@@ -850,9 +968,9 @@ Reference this group by using

 | Property                    | Type     | Required | Nullable       | Defined by                                                                                                                                                                                                                                 |
 | :-------------------------- | :------- | :------- | :------------- | :----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| [type](#type-9)             | `string` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedsendkeyrequestaction-properties-type.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedSendKeyRequestAction/properties/type")             |
+| [type](#type-10)            | `string` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedsendkeyrequestaction-properties-type.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedSendKeyRequestAction/properties/type")             |
 | [dsn](#dsn-1)               | `number` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedsendkeyrequestaction-properties-dsn.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedSendKeyRequestAction/properties/dsn")               |
-| [deviceId](#deviceid)       | `string` | Optional | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedsendkeyrequestaction-properties-deviceid.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedSendKeyRequestAction/properties/deviceId")     |
+| [deviceId](#deviceid-1)     | `string` | Optional | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedsendkeyrequestaction-properties-deviceid.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedSendKeyRequestAction/properties/deviceId")     |
 | [categoryId](#categoryid-1) | `string` | Optional | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedsendkeyrequestaction-properties-categoryid.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedSendKeyRequestAction/properties/categoryId") |
 | [dataType](#datatype)       | `number` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedsendkeyrequestaction-properties-datatype.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedSendKeyRequestAction/properties/dataType")     |
 | [tempKey](#tempkey-1)       | `string` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedsendkeyrequestaction-properties-tempkey.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedSendKeyRequestAction/properties/tempKey")       |
@@ -1002,7 +1120,7 @@ Reference this group by using

 | Property         | Type     | Required | Nullable       | Defined by                                                                                                                                                                                                                       |
 | :--------------- | :------- | :------- | :------------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| [type](#type-10) | `string` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedsignoutatdeviceaction-properties-type.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedSignOutAtDeviceAction/properties/type") |
+| [type](#type-11) | `string` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedsignoutatdeviceaction-properties-type.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedSignOutAtDeviceAction/properties/type") |

 ### type

@@ -1040,7 +1158,7 @@ Reference this group by using

 | Property         | Type     | Required | Nullable       | Defined by                                                                                                                                                                                                                                           |
 | :--------------- | :------- | :------- | :------------- | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| [type](#type-11) | `string` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serialiezdtrieddisablingdeviceadminaction-properties-type.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerialiezdTriedDisablingDeviceAdminAction/properties/type") |
+| [type](#type-12) | `string` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serialiezdtrieddisablingdeviceadminaction-properties-type.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerialiezdTriedDisablingDeviceAdminAction/properties/type") |

 ### type

@@ -1078,7 +1196,7 @@ Reference this group by using

 | Property                          | Type     | Required | Nullable       | Defined by                                                                                                                                                                                                                                                   |
 | :-------------------------------- | :------- | :------- | :------------- | :----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| [type](#type-12)                  | `string` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedupdateappactivitiesaction-properties-type.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedUpdateAppActivitiesAction/properties/type")                     |
+| [type](#type-13)                  | `string` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedupdateappactivitiesaction-properties-type.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedUpdateAppActivitiesAction/properties/type")                     |
 | [removed](#removed)               | `array`  | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedupdateappactivitiesaction-properties-removed.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedUpdateAppActivitiesAction/properties/removed")               |
 | [updatedOrAdded](#updatedoradded) | `array`  | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedupdateappactivitiesaction-properties-updatedoradded.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedUpdateAppActivitiesAction/properties/updatedOrAdded") |

@@ -1230,7 +1348,7 @@ Reference this group by using

 | Property                                                    | Type      | Required | Nullable       | Defined by                                                                                                                                                                                                                                                                           |
 | :---------------------------------------------------------- | :-------- | :------- | :------------- | :----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| [type](#type-13)                                            | `string`  | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedupdatedevicestatusaction-properties-type.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedUpdateDeviceStatusAction/properties/type")                                               |
+| [type](#type-14)                                            | `string`  | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedupdatedevicestatusaction-properties-type.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedUpdateDeviceStatusAction/properties/type")                                               |
 | [protectionLevel](#protectionlevel)                         | `string`  | Optional | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedupdatedevicestatusaction-properties-protectionlevel.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedUpdateDeviceStatusAction/properties/protectionLevel")                         |
 | [usageStats](#usagestats)                                   | `string`  | Optional | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedupdatedevicestatusaction-properties-usagestats.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedUpdateDeviceStatusAction/properties/usageStats")                                   |
 | [notificationAccess](#notificationaccess)                   | `string`  | Optional | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializedupdatedevicestatusaction-properties-notificationaccess.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedUpdateDeviceStatusAction/properties/notificationAccess")                   |
@@ -1518,7 +1636,7 @@ Reference this group by using

 | Property         | Type     | Required | Nullable       | Defined by                                                                                                                                                                                                                                   |
 | :--------------- | :------- | :------- | :------------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| [type](#type-14) | `string` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializeduploaddevicepublickeyaction-properties-type.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedUploadDevicePublicKeyAction/properties/type") |
+| [type](#type-15) | `string` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializeduploaddevicepublickeyaction-properties-type.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedUploadDevicePublicKeyAction/properties/type") |
 | [key](#key)      | `string` | Required | cannot be null | [SerializedAppLogicAction](serializedapplogicaction-definitions-serializeduploaddevicepublickeyaction-properties-key.md "https://timelimit.io/SerializedAppLogicAction#/definitions/SerializedUploadDevicePublicKeyAction/properties/key")   |

 ### type
@@ -0,0 +1,15 @@
+# Untitled string in ServerDataStatus Schema
+
+```txt
+https://timelimit.io/ServerDataStatus#/definitions/ServerPing/properties/deviceId
+```
+
+
+
+| Abstract            | Extensible | Status         | Identifiable            | Custom Properties | Additional Properties | Access Restrictions | Defined In                                                                            |
+| :------------------ | :--------- | :------------- | :---------------------- | :---------------- | :-------------------- | :------------------ | :------------------------------------------------------------------------------------ |
+| Can be instantiated | No         | Unknown status | Unknown identifiability | Forbidden         | Allowed               | none                | [ServerDataStatus.schema.json\*](ServerDataStatus.schema.json "open original schema") |
+
+## deviceId Type
+
+`string`
@@ -0,0 +1,15 @@
+# Untitled string in ServerDataStatus Schema
+
+```txt
+https://timelimit.io/ServerDataStatus#/definitions/ServerPing/properties/token
+```
+
+
+
+| Abstract            | Extensible | Status         | Identifiable            | Custom Properties | Additional Properties | Access Restrictions | Defined In                                                                            |
+| :------------------ | :--------- | :------------- | :---------------------- | :---------------- | :-------------------- | :------------------ | :------------------------------------------------------------------------------------ |
+| Can be instantiated | No         | Unknown status | Unknown identifiability | Forbidden         | Allowed               | none                | [ServerDataStatus.schema.json\*](ServerDataStatus.schema.json "open original schema") |
+
+## token Type
+
+`string`
@@ -0,0 +1,24 @@
+# Untitled string in ServerDataStatus Schema
+
+```txt
+https://timelimit.io/ServerDataStatus#/definitions/ServerPing/properties/type
+```
+
+
+
+| Abstract            | Extensible | Status         | Identifiable            | Custom Properties | Additional Properties | Access Restrictions | Defined In                                                                            |
+| :------------------ | :--------- | :------------- | :---------------------- | :---------------- | :-------------------- | :------------------ | :------------------------------------------------------------------------------------ |
+| Can be instantiated | No         | Unknown status | Unknown identifiability | Forbidden         | Allowed               | none                | [ServerDataStatus.schema.json\*](ServerDataStatus.schema.json "open original schema") |
+
+## type Type
+
+`string`
+
+## type Constraints
+
+**enum**: the value of this property must be equal to one of the following values:
+
+| Value    | Explanation |
+| :------- | :---------- |
+| `"ping"` |             |
+| `"pong"` |             |
@@ -0,0 +1,86 @@
+# ServerPing Schema
+
+```txt
+https://timelimit.io/ServerDataStatus#/definitions/ServerPing
+```
+
+
+
+| Abstract            | Extensible | Status         | Identifiable | Custom Properties | Additional Properties | Access Restrictions | Defined In                                                                            |
+| :------------------ | :--------- | :------------- | :----------- | :---------------- | :-------------------- | :------------------ | :------------------------------------------------------------------------------------ |
+| Can be instantiated | No         | Unknown status | No           | Forbidden         | Forbidden             | none                | [ServerDataStatus.schema.json\*](ServerDataStatus.schema.json "open original schema") |
+
+## ServerPing Type
+
+`object` ([ServerPing](serverdatastatus-definitions-serverping.md))
+
+# ServerPing Properties
+
+| Property              | Type     | Required | Nullable       | Defined by                                                                                                                                                             |
+| :-------------------- | :------- | :------- | :------------- | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| [deviceId](#deviceid) | `string` | Required | cannot be null | [ServerDataStatus](serverdatastatus-definitions-serverping-properties-deviceid.md "https://timelimit.io/ServerDataStatus#/definitions/ServerPing/properties/deviceId") |
+| [token](#token)       | `string` | Required | cannot be null | [ServerDataStatus](serverdatastatus-definitions-serverping-properties-token.md "https://timelimit.io/ServerDataStatus#/definitions/ServerPing/properties/token")       |
+| [type](#type)         | `string` | Required | cannot be null | [ServerDataStatus](serverdatastatus-definitions-serverping-properties-type.md "https://timelimit.io/ServerDataStatus#/definitions/ServerPing/properties/type")         |
+
+## deviceId
+
+
+
+`deviceId`
+
+* is required
+
+* Type: `string`
+
+* cannot be null
+
+* defined in: [ServerDataStatus](serverdatastatus-definitions-serverping-properties-deviceid.md "https://timelimit.io/ServerDataStatus#/definitions/ServerPing/properties/deviceId")
+
+### deviceId Type
+
+`string`
+
+## token
+
+
+
+`token`
+
+* is required
+
+* Type: `string`
+
+* cannot be null
+
+* defined in: [ServerDataStatus](serverdatastatus-definitions-serverping-properties-token.md "https://timelimit.io/ServerDataStatus#/definitions/ServerPing/properties/token")
+
+### token Type
+
+`string`
+
+## type
+
+
+
+`type`
+
+* is required
+
+* Type: `string`
+
+* cannot be null
+
+* defined in: [ServerDataStatus](serverdatastatus-definitions-serverping-properties-type.md "https://timelimit.io/ServerDataStatus#/definitions/ServerPing/properties/type")
+
+### type Type
+
+`string`
+
+### type Constraints
+
+**enum**: the value of this property must be equal to one of the following values:
+
+| Value    | Explanation |
+| :------- | :---------- |
+| `"ping"` |             |
+| `"pong"` |             |
@@ -0,0 +1,15 @@
+# Untitled array in ServerDataStatus Schema
+
+```txt
+https://timelimit.io/ServerDataStatus#/properties/pings
+```
+
+
+
+| Abstract            | Extensible | Status         | Identifiable            | Custom Properties | Additional Properties | Access Restrictions | Defined In                                                                            |
+| :------------------ | :--------- | :------------- | :---------------------- | :---------------- | :-------------------- | :------------------ | :------------------------------------------------------------------------------------ |
+| Can be instantiated | No         | Unknown status | Unknown identifiability | Forbidden         | Allowed               | none                | [ServerDataStatus.schema.json\*](ServerDataStatus.schema.json "open original schema") |
+
+## pings Type
+
+`object[]` ([ServerPing](serverdatastatus-definitions-serverping.md))
@@ -30,6 +30,7 @@ https://timelimit.io/ServerDataStatus
 | [users](#users)               | `object` | Optional | cannot be null | [ServerDataStatus](serverdatastatus-definitions-serveruserlist.md "https://timelimit.io/ServerDataStatus#/properties/users")     |
 | [krq](#krq)                   | `array`  | Optional | cannot be null | [ServerDataStatus](serverdatastatus-properties-krq.md "https://timelimit.io/ServerDataStatus#/properties/krq")                   |
 | [kr](#kr)                     | `array`  | Optional | cannot be null | [ServerDataStatus](serverdatastatus-properties-kr.md "https://timelimit.io/ServerDataStatus#/properties/kr")                     |
+| [pings](#pings)               | `array`  | Optional | cannot be null | [ServerDataStatus](serverdatastatus-properties-pings.md "https://timelimit.io/ServerDataStatus#/properties/pings")               |
 | [dh](#dh)                     | `object` | Optional | cannot be null | [ServerDataStatus](serverdatastatus-definitions-serverdhkey.md "https://timelimit.io/ServerDataStatus#/properties/dh")           |
 | [u2f](#u2f)                   | `object` | Optional | cannot be null | [ServerDataStatus](serverdatastatus-definitions-u2fdata.md "https://timelimit.io/ServerDataStatus#/properties/u2f")              |
 | [fullVersion](#fullversion)   | `number` | Required | cannot be null | [ServerDataStatus](serverdatastatus-properties-fullversion.md "https://timelimit.io/ServerDataStatus#/properties/fullVersion")   |
@@ -252,6 +253,24 @@ https://timelimit.io/ServerDataStatus

 `object[]` ([ServerKeyResponse](serverdatastatus-definitions-serverkeyresponse.md))

+## pings
+
+
+
+`pings`
+
+* is optional
+
+* Type: `object[]` ([ServerPing](serverdatastatus-definitions-serverping.md))
+
+* cannot be null
+
+* defined in: [ServerDataStatus](serverdatastatus-properties-pings.md "https://timelimit.io/ServerDataStatus#/properties/pings")
+
+### pings Type
+
+`object[]` ([ServerPing](serverdatastatus-definitions-serverping.md))
+
 ## dh


@@ -3449,6 +3468,83 @@ Reference this group by using

 `string`

+## Definitions group ServerPing
+
+Reference this group by using
+
+```json
+{"$ref":"https://timelimit.io/ServerDataStatus#/definitions/ServerPing"}
+```
+
+| Property                | Type     | Required | Nullable       | Defined by                                                                                                                                                             |
+| :---------------------- | :------- | :------- | :------------- | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| [deviceId](#deviceid-4) | `string` | Required | cannot be null | [ServerDataStatus](serverdatastatus-definitions-serverping-properties-deviceid.md "https://timelimit.io/ServerDataStatus#/definitions/ServerPing/properties/deviceId") |
+| [token](#token)         | `string` | Required | cannot be null | [ServerDataStatus](serverdatastatus-definitions-serverping-properties-token.md "https://timelimit.io/ServerDataStatus#/definitions/ServerPing/properties/token")       |
+| [type](#type-2)         | `string` | Required | cannot be null | [ServerDataStatus](serverdatastatus-definitions-serverping-properties-type.md "https://timelimit.io/ServerDataStatus#/definitions/ServerPing/properties/type")         |
+
+### deviceId
+
+
+
+`deviceId`
+
+* is required
+
+* Type: `string`
+
+* cannot be null
+
+* defined in: [ServerDataStatus](serverdatastatus-definitions-serverping-properties-deviceid.md "https://timelimit.io/ServerDataStatus#/definitions/ServerPing/properties/deviceId")
+
+#### deviceId Type
+
+`string`
+
+### token
+
+
+
+`token`
+
+* is required
+
+* Type: `string`
+
+* cannot be null
+
+* defined in: [ServerDataStatus](serverdatastatus-definitions-serverping-properties-token.md "https://timelimit.io/ServerDataStatus#/definitions/ServerPing/properties/token")
+
+#### token Type
+
+`string`
+
+### type
+
+
+
+`type`
+
+* is required
+
+* Type: `string`
+
+* cannot be null
+
+* defined in: [ServerDataStatus](serverdatastatus-definitions-serverping-properties-type.md "https://timelimit.io/ServerDataStatus#/definitions/ServerPing/properties/type")
+
+#### type Type
+
+`string`
+
+#### type Constraints
+
+**enum**: the value of this property must be equal to one of the following values:
+
+| Value    | Explanation |
+| :------- | :---------- |
+| `"ping"` |             |
+| `"pong"` |             |
+
 ## Definitions group ServerDhKey

 Reference this group by using
@@ -0,0 +1,18 @@
+// @ts-check
+
+import eslint from '@eslint/js';
+import { defineConfig } from 'eslint/config';
+import tseslint from 'typescript-eslint';
+
+export default defineConfig(
+  eslint.configs.recommended,
+  tseslint.configs.recommended,
+  {
+    ignores: ['build', 'scripts']
+  },
+  {
+    rules: {
+      '@typescript-eslint/no-unused-vars': ['warn', { caughtErrors: 'none' }]
+    }
+  }
+)
@@ -6,10 +6,10 @@
  "scripts": {
    "start": "node ./build/index.js",
    "test": "node scripts/test-launch-with-different-databases.js",
-    "lint": "eslint . --ext .js,.jsx,.ts,.tsx",
-    "lint:fix": "eslint . --ext .js,.jsx,.ts,.tsx --fix",
+    "lint": "eslint .",
+    "lint:fix": "eslint . --fix",
    "build": "npm run build:clean && npm run build:json && npm run build:ts && npm run lint && npm run build:doc",
-    "build:clean": "rimraf build",
+    "build:clean": "rm -rf build",
    "build:json": "node ./scripts/build-schemas.js",
    "build:ts": "tsc",
    "build:doc": "npm run build:doc:json",
@@ -30,6 +30,7 @@
  "homepage": "https://gitlab.com/timelimit.io/timelimit-server-2018#README",
  "devDependencies": {
    "@adobe/jsonschema2md": "^8.0.8",
+    "@eslint/js": "^10.0.1",
    "@types/basic-auth": "^1.1.3",
    "@types/body-parser": "^1.19.0",
    "@types/ejs": "^3.1.0",
@@ -38,15 +39,13 @@
    "@types/lodash": "^4.14.166",
    "@types/node": "^16.11.59",
    "@types/nodemailer": "^6.4.4",
-    "@typescript-eslint/eslint-plugin": "^7.18.0",
-    "@typescript-eslint/parser": "^7.18.0",
-    "eslint": "^8.7.0",
-    "rimraf": "^3.0.2",
+    "eslint": "^10.0.1",
    "typescript": "^5.5.4",
+    "typescript-eslint": "^8.56.0",
    "typescript-json-schema": "^0.52.0"
  },
  "dependencies": {
-    "ajv": "^7.0.2",
+    "ajv": "^8.18.0",
    "basic-auth": "^2.0.1",
    "body-parser": "^1.19.0",
    "ejs": "^3.1.5",
@@ -56,7 +55,7 @@
    "jose": "^4.9.3",
    "lodash": "^4.17.21",
    "mariadb": "^2.5.2",
-    "nodemailer": "^7.0.9",
+    "nodemailer": "^8.0.4",
    "pg": "^8.5.1",
    "pg-hstore": "^2.3.3",
    "rate-limiter-flexible": "^2.1.15",
@@ -65,6 +64,6 @@
    "umzug": "^3.8.1"
  },
  "optionalDependencies": {
-    "sqlite3": "^5.0.0"
+    "sqlite3": "npm:@vscode/sqlite3@^5.1.12-vscode"
  }
 }
@@ -24,6 +24,8 @@ const { spawnAsync } = require('../process.js')
 const { sleep } = require('../sleep.js')

 async function startMariadb() {
+  const osUsername = require('os').userInfo().username
+
  try { await mkdirAsync(tempDir) } catch (ex) {/* ignore */}

  const instanceDir = resolve(tempDir, generateShortToken())
@@ -60,12 +62,12 @@ async function startMariadb() {

  for (command of commands) {
    console.log(command)
-    await spawnAsync('mysql', ['-S', socketPath, '-u', 'root', '-e', command], { stdio: 'inherit' })
+    await spawnAsync('mysql', ['-S', socketPath, '-u', osUsername, '-e', command], { stdio: 'inherit' })
  }

  return {
    shutdown: () => {
-      spawnAsync('mysql', ['-S', socketPath, '-u', 'root', '-e', 'SHUTDOWN;'], { stdio: 'inherit' }).catch((ex) => {
+      spawnAsync('mysql', ['-S', socketPath, '-u', osUsername, '-e', 'SHUTDOWN;'], { stdio: 'inherit' }).catch((ex) => {
        console.warn(ex)
      })
    },
@@ -58,7 +58,7 @@ async function startPostgres() {
  const password = generateToken() // this database accepts anything

  await spawnAsync('createuser', ['-h', socketDir, username], { stdio: 'inherit' })
-  await spawnAsync('createdb', ['-h', socketDir, database], { stdio: 'inherit' })
+  await spawnAsync('createdb', ['-h', socketDir, '--owner', username, database], { stdio: 'inherit' })

  return {
    shutdown: () => task.kill('SIGINT'),
@@ -1,6 +1,6 @@
 /*
 * server component for the TimeLimit App
- * Copyright (C) 2019 - 2022 Jonas Lochmann
+ * Copyright (C) 2019 - 2026 Jonas Lochmann
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
@@ -78,6 +78,7 @@ export { UpdateTimelimitRuleAction } from './updatetimelimitrule'
 export { UpdateUserFlagsAction } from './updateuserflags'
 export { UpdateUserLimitLoginCategory } from './updateuserlimitlogincategory'
 export { MarkTaskPendingAction } from './marktaskpendingaction'
+export { PingAction } from './ping'
 export { DeleteChildTaskAction } from './deletechildtaskaction'
 export { UpdateChildTaskAction } from './updatechildtaskaction'
 export { ReviewChildTaskAction } from './reviewchildtaskaction'
@@ -0,0 +1,55 @@
+/*
+ * server component for the TimeLimit App
+ * Copyright (C) 2019 - 2026 Jonas Lochmann
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import { AppLogicAction } from './basetypes'
+import { assertIdWithinFamily } from './meta/util'
+
+const actionType = 'PingAction'
+
+export class PingAction extends AppLogicAction {
+  readonly deviceId: string
+  readonly event: PingEvent
+  readonly token: string
+
+  constructor ({ deviceId, event, token }: {
+    deviceId: string
+    event: PingEvent
+    token: string
+  }) {
+    super()
+
+    assertIdWithinFamily({ actionType, field: 'deviceId', value: deviceId })
+    assertIdWithinFamily({ actionType, field: 'token', value: token })
+
+    this.deviceId = deviceId
+    this.event = event
+    this.token = token
+  }
+
+  static parse = ({ deviceId, event, token }: SerializedPingAction) => (
+    new PingAction({ deviceId, event, token })
+  )
+}
+
+export interface SerializedPingAction {
+  type: 'PING'
+  deviceId: string
+  event: PingEvent
+  token: string
+}
+
+export type PingEvent = 'ping' | 'pong' | 'clear'
@@ -1,6 +1,6 @@
 /*
 * server component for the TimeLimit App
- * Copyright (C) 2019 - 2022 Jonas Lochmann
+ * Copyright (C) 2019 - 2026 Jonas Lochmann
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
@@ -24,6 +24,7 @@ import { ForceSyncAction, SerializedForceSyncAction } from '../forcesync'
 import { ReplyToKeyRequestAction, SerializedReplyToKeyRequestAction } from '../replytokeyrequest'
 import { MarkTaskPendingAction, SerializedMarkTaskPendingAction } from '../marktaskpendingaction'
 import { UnknownActionTypeException } from '../meta/exception'
+import { PingAction, SerializedPingAction } from '../ping'
 import { UpdateInstalledAppsAction, SerializedUpdateInstalledAppsAction } from '../updateinstalledapps'
 import { RemoveInstalledAppsAction, SerializedRemoveInstalledAppsAction } from '../removeinstalledapps'
 import { SendKeyRequestAction, SerializedSendKeyRequestAction } from '../sendkeyrequest'
@@ -41,6 +42,7 @@ export type SerializedAppLogicAction =
  SerializedForceSyncAction |
  SerializedReplyToKeyRequestAction |
  SerializedMarkTaskPendingAction |
+  SerializedPingAction |
  SerializedUpdateInstalledAppsAction |
  SerializedRemoveInstalledAppsAction |
  SerializedSendKeyRequestAction |
@@ -65,6 +67,8 @@ export const parseAppLogicAction = (serialized: SerializedAppLogicAction): AppLo
    return ReplyToKeyRequestAction.parse(serialized)
  } else if (serialized.type === 'MARK_TASK_PENDING') {
    return MarkTaskPendingAction.parse(serialized)
+  } else if (serialized.type === 'PING') {
+    return PingAction.parse(serialized)
  } else if (serialized.type === 'UPDATE_INSTALLED_APPS') {
    return UpdateInstalledAppsAction.parse(serialized)
  } else if (serialized.type === 'REMOVE_INSTALLED_APPS') {
@@ -140,13 +140,15 @@ export const createAdminRouter = ({ database, websocket, eventHandler }: {
      if (
        typeof req.body !== 'object' ||
        typeof req.body.purchaseToken !== 'string' ||
-        typeof req.body.purchaseId !== 'string'
+        typeof req.body.purchaseId !== 'string' ||
+        typeof req.body.dryRun !== 'boolean'
      ) {
        throw new BadRequest()
      }

      const purchaseToken: string = req.body.purchaseToken
      const purchaseId: string = req.body.purchaseId
+      const dryRun: boolean = req.body.dryRun

      const tokenContent = await verifyIdentitifyToken(purchaseToken)

@@ -250,15 +252,17 @@ export const createAdminRouter = ({ database, websocket, eventHandler }: {
            }
          }

-          await addPurchase({
-            database,
-            familyId: tokenContent.familyId,
-            type: 'year',
-            service: 'directpurchase',
-            transactionId: purchaseId,
-            websocket,
-            transaction
-          })
+          if (!dryRun) {
+            await addPurchase({
+              database,
+              familyId: tokenContent.familyId,
+              type: 'year',
+              service: 'directpurchase',
+              transactionId: purchaseId,
+              websocket,
+              transaction
+            })
+          }
        }

        return {
@@ -1759,6 +1759,41 @@ const definitions = {
      "type"
    ]
  },
+  "SerializedPingAction": {
+    "type": "object",
+    "properties": {
+      "type": {
+        "type": "string",
+        "enum": [
+          "PING"
+        ]
+      },
+      "deviceId": {
+        "type": "string"
+      },
+      "event": {
+        "$ref": "#/definitions/PingEvent"
+      },
+      "token": {
+        "type": "string"
+      }
+    },
+    "additionalProperties": false,
+    "required": [
+      "deviceId",
+      "event",
+      "token",
+      "type"
+    ]
+  },
+  "PingEvent": {
+    "enum": [
+      "clear",
+      "ping",
+      "pong"
+    ],
+    "type": "string"
+  },
  "SerializedUpdateInstalledAppsAction": {
    "type": "object",
    "properties": {
@@ -2815,6 +2850,30 @@ const definitions = {
      "tempKey"
    ]
  },
+  "ServerPing": {
+    "type": "object",
+    "properties": {
+      "deviceId": {
+        "type": "string"
+      },
+      "token": {
+        "type": "string"
+      },
+      "type": {
+        "enum": [
+          "ping",
+          "pong"
+        ],
+        "type": "string"
+      }
+    },
+    "additionalProperties": false,
+    "required": [
+      "deviceId",
+      "token",
+      "type"
+    ]
+  },
  "ServerDhKey": {
    "type": "object",
    "properties": {
@@ -3213,6 +3272,9 @@ export const isSerializedAppLogicAction: (value: unknown) => value is Serialized
    {
      "$ref": "#/definitions/SerializedMarkTaskPendingAction"
    },
+    {
+      "$ref": "#/definitions/SerializedPingAction"
+    },
    {
      "$ref": "#/definitions/SerializedUpdateInstalledAppsAction"
    },
@@ -1,6 +1,6 @@
 /*
 * server component for the TimeLimit App
- * Copyright (C) 2019 - 2022 Jonas Lochmann
+ * Copyright (C) 2019 - 2026 Jonas Lochmann
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
@@ -33,6 +33,7 @@ import { createKeyResponseModel, KeyResponseModelStatic } from './keyresponse'
 import { createMailLoginTokenModel, MailLoginTokenModelStatic } from './maillogintoken'
 import { createUmzug } from './migration/umzug'
 import { createOldDeviceModel, OldDeviceModelStatic } from './olddevice'
+import { createPingModel, PingModelStatic } from './ping'
 import { createPurchaseModel, PurchaseModelStatic } from './purchase'
 import { createSessionDurationModel, SessionDurationModelStatic } from './sessionduration'
 import { createTimelimitRuleModel, TimelimitRuleModelStatic } from './timelimitrule'
@@ -61,6 +62,7 @@ export interface Database {
  keyResponse: KeyResponseModelStatic
  mailLoginToken: MailLoginTokenModelStatic
  oldDevice: OldDeviceModelStatic
+  ping: PingModelStatic
  purchase: PurchaseModelStatic
  sessionDuration: SessionDurationModelStatic
  timelimitRule: TimelimitRuleModelStatic
@@ -97,6 +99,7 @@ const createDatabase = (sequelize: Sequelize.Sequelize): Database => ({
  keyResponse: createKeyResponseModel(sequelize),
  mailLoginToken: createMailLoginTokenModel(sequelize),
  oldDevice: createOldDeviceModel(sequelize),
+  ping: createPingModel(sequelize),
  purchase: createPurchaseModel(sequelize),
  sessionDuration: createSessionDurationModel(sequelize),
  timelimitRule: createTimelimitRuleModel(sequelize),
@@ -0,0 +1,67 @@
+/*
+ * server component for the TimeLimit App
+ * Copyright (C) 2019 - 2026 Jonas Lochmann
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import { QueryInterface, Sequelize, Transaction } from 'sequelize'
+
+export async function up (queryInterface: QueryInterface, sequelize: Sequelize) {
+  await sequelize.transaction({
+    type: Transaction.TYPES.EXCLUSIVE
+  }, async (transaction) => {
+    const dialect = sequelize.getDialect()
+    const isMysql = dialect === 'mysql' || dialect === 'mariadb'
+
+    if (isMysql) {
+      await sequelize.query(
+        'CREATE TABLE `Pings` ' +
+        '(`familyId` VARCHAR(10) NOT NULL,' +
+        '`receiverDeviceId` VARCHAR(6) NOT NULL,' +
+        '`senderDeviceId` VARCHAR(6) NOT NULL,' +
+        '`type` INTEGER NOT NULL,' +
+        '`token` VARCHAR(6) NOT NULL,' +
+        'PRIMARY KEY (`familyId`, `receiverDeviceId`, `senderDeviceId`, `type`),' +
+        'FOREIGN KEY (`familyId`, `receiverDeviceId`) REFERENCES `Devices` (`familyId`, `deviceId`) ON UPDATE CASCADE ON DELETE CASCADE,' +
+        'FOREIGN KEY (`familyId`, `senderDeviceId`) REFERENCES `Devices` (`familyId`, `deviceId`) ON UPDATE CASCADE ON DELETE CASCADE' +
+        ')',
+        { transaction }
+      )
+    } else {
+      await sequelize.query(
+        'CREATE TABLE "Pings" ' +
+        '("familyId" VARCHAR(10) NOT NULL,' +
+        '"receiverDeviceId" VARCHAR(6) NOT NULL,' +
+        '"senderDeviceId" VARCHAR(6) NOT NULL,' +
+        '"type" INTEGER NOT NULL,' +
+        '"token" VARCHAR(6) NOT NULL,' +
+        'PRIMARY KEY ("familyId", "receiverDeviceId", "senderDeviceId", "type"),' +
+        'FOREIGN KEY ("familyId", "receiverDeviceId") REFERENCES "Devices" ("familyId", "deviceId") ON UPDATE CASCADE ON DELETE CASCADE,' +
+        'FOREIGN KEY ("familyId", "senderDeviceId") REFERENCES "Devices" ("familyId", "deviceId") ON UPDATE CASCADE ON DELETE CASCADE' +
+        ')',
+        { transaction }
+      )
+    }
+
+    await queryInterface.addIndex('Pings', ['familyId', 'senderDeviceId'], { transaction })
+  })
+}
+
+export async function down (queryInterface: QueryInterface, sequelize: Sequelize) {
+  await sequelize.transaction({
+    type: Transaction.TYPES.EXCLUSIVE
+  }, async (transaction) => {
+    await queryInterface.dropTable('Pings', { transaction })
+  })
+}
@@ -1,6 +1,6 @@
 /*
 * server component for the TimeLimit App
- * Copyright (C) 2019 - 2024 Jonas Lochmann
+ * Copyright (C) 2019 - 2026 Jonas Lochmann
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
@@ -27,7 +27,7 @@ export const createUmzug = (sequelize: Sequelize) => (
      resolve: ({ name, path }) => {
        if (!path) throw new Error()

-        // eslint-disable-next-line @typescript-eslint/no-var-requires
+        // eslint-disable-next-line @typescript-eslint/no-require-imports
        const migration = require(path)

        return {
@@ -0,0 +1,67 @@
+/*
+ * server component for the TimeLimit App
+ * Copyright (C) 2019 - 2026 Jonas Lochmann
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import * as Sequelize from 'sequelize'
+import { familyIdColumn, idWithinFamilyColumn } from './columns'
+import { SequelizeAttributes } from './types'
+
+export interface PingAttributes {
+  familyId: string
+  receiverDeviceId: string
+  senderDeviceId: string
+  type: number
+  token: string
+}
+
+export const types = {
+  ping: 1,
+  pong: 2,
+  all: [1, 2]
+}
+
+export type PingModel = Sequelize.Model<PingAttributes> & PingAttributes
+export type PingModelStatic = typeof Sequelize.Model & {
+  new (values?: object, options?: Sequelize.BuildOptions): PingModel;
+}
+
+export const attributes: SequelizeAttributes<PingAttributes> = {
+  familyId: {
+    ...familyIdColumn,
+    primaryKey: true
+  },
+  receiverDeviceId: {
+    ...idWithinFamilyColumn,
+    primaryKey: true
+  },
+  senderDeviceId: {
+    ...idWithinFamilyColumn,
+    primaryKey: true
+  },
+  type: {
+    type: Sequelize.INTEGER,
+    allowNull: false,
+    validate: {
+      isIn: [types.all]
+    },
+    primaryKey: true
+  },
+  token: {
+    ...idWithinFamilyColumn
+  }
+}
+
+export const createPingModel = (sequelize: Sequelize.Sequelize): PingModelStatic => sequelize.define('Ping', attributes) as PingModelStatic
@@ -1,6 +1,6 @@
 /*
 * server component for the TimeLimit App
- * Copyright (C) 2019 - 2023 Jonas Lochmann
+ * Copyright (C) 2019 - 2026 Jonas Lochmann
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
@@ -89,7 +89,6 @@ export async function dispatchAddUsedTimeVersion2 ({ deviceId, action, cache, ev
      addUsedTimeForADifferentUserThanTheCurrentUserOfTheDevice = true
    }

-    // eslint-disable-next-line no-inner-declarations
    async function handle (start: number, end: number) {
      const lengthInMinutes = (end - start) + 1
      const lengthInMs = lengthInMinutes * 1000 * 60
@@ -215,10 +214,10 @@ export async function dispatchAddUsedTimeVersion2 ({ deviceId, action, cache, ev

        const fittingDurationItemsLastUsageFiltered =
          hasTrustedTimestamp ?
-          fittingDurationItems.filter((it) => {
+          fittingDurationItems.filter((it) => (
            action.trustedTimestamp - item.timeToAdd <=
            parseInt(it.lastUsage, 10) + it.sessionPauseDuration - tolerance
-          }) : fittingDurationItems
+          )) : fittingDurationItems

        return fittingDurationItemsLastUsageFiltered
          .map((it) => it.lastSessionDuration)
@@ -1,6 +1,6 @@
 /*
 * server component for the TimeLimit App
- * Copyright (C) 2019 - 2022 Jonas Lochmann
+ * Copyright (C) 2019 - 2026 Jonas Lochmann
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
@@ -23,6 +23,7 @@ import {
  FinishKeyRequestAction,
  ForceSyncAction,
  MarkTaskPendingAction,
+  PingAction,
  ReplyToKeyRequestAction,
  RemoveInstalledAppsAction,
  SendKeyRequestAction,
@@ -41,6 +42,7 @@ import { dispatchAddUsedTimeVersion2 } from './addusedtime2'
 import { dispatchFinishKeyRequestAction } from './finishkeyrequest'
 import { dispatchForceSyncAction } from './forcesync'
 import { dispatchMarkTaskPendingAction } from './marktaskpendingaction'
+import { dispatchPingAction } from './ping'
 import { dispatchReplyToKeyRequestAction } from './replytokeyrequest'
 import { dispatchSendKeyRequestAction } from './sendkeyrequest'
 import { dispatchSignOutAtDevice } from './signoutatdevice'
@@ -67,6 +69,8 @@ export const dispatchAppLogicAction = async ({ action, deviceId, cache, eventHan
    await dispatchForceSyncAction({ deviceId, action, cache })
  } else if (action instanceof MarkTaskPendingAction) {
    await dispatchMarkTaskPendingAction({ deviceId, action, cache })
+  } else if (action instanceof PingAction) {
+    await dispatchPingAction({ deviceId, action, cache })
  } else if (action instanceof ReplyToKeyRequestAction) {
    await dispatchReplyToKeyRequestAction({ deviceId, action, cache, eventHandler })
  } else if (action instanceof RemoveInstalledAppsAction) {
@@ -0,0 +1,73 @@
+/*
+ * server component for the TimeLimit App
+ * Copyright (C) 2019 - 2026 Jonas Lochmann
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import { PingAction } from '../../../../action'
+import { types as pingTypes } from '../../../../database/ping'
+import { Cache } from '../cache'
+
+export async function dispatchPingAction ({ action, cache, deviceId }: {
+  deviceId: string
+  action: PingAction
+  cache: Cache
+}) {
+  // handle insertion
+  if (action.event === 'ping' || action.event === 'pong') {
+    let type
+
+    if (action.event === 'ping') type = pingTypes.ping
+    else if (action.event === 'pong') type = pingTypes.pong
+    else throw new Error()
+
+    // delete any previous ping/pong
+    await cache.database.ping.destroy({
+      where: {
+        familyId: cache.familyId,
+        receiverDeviceId: action.deviceId,
+        senderDeviceId: deviceId,
+	type: type
+      },
+      transaction: cache.transaction
+    })
+
+    // insert
+    await cache.database.ping.create({
+      familyId: cache.familyId,
+      receiverDeviceId: action.deviceId,
+      senderDeviceId: deviceId,
+      type,
+      token: action.token
+    }, {
+      transaction: cache.transaction
+    })
+
+    // notify
+    cache.incrementTargetedTriggeredSyncLevel(action.deviceId, 2)
+  }
+
+  // handle deleting
+  if (action.event === 'pong' || action.event === 'clear') {
+    await cache.database.ping.destroy({
+      where: {
+        familyId: cache.familyId,
+        receiverDeviceId: deviceId,
+        senderDeviceId: action.deviceId,
+        token: action.token
+      },
+      transaction: cache.transaction
+    })
+  }
+}
@@ -1,6 +1,6 @@
 /*
 * server component for the TimeLimit App
- * Copyright (C) 2019 - 2022 Jonas Lochmann
+ * Copyright (C) 2019 - 2026 Jonas Lochmann
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
@@ -48,7 +48,8 @@ export const dispatchChildChangePassword = async ({ action, childUserId, cache }

  {
    const clear = cache.getSecondPasswordHashOfChild.cache.clear
-    clear && clear()
+
+    if (clear) clear()
  }

  cache.invalidiateUserList = true
@@ -1,6 +1,6 @@
 /*
 * server component for the TimeLimit App
- * Copyright (C) 2019 - 2022 Jonas Lochmann
+ * Copyright (C) 2019 - 2026 Jonas Lochmann
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
@@ -55,7 +55,8 @@ export async function dispatchChangeParentPassword ({ action, cache }: {

  {
    const clear = cache.getSecondPasswordHashOfParent.cache.clear
-    clear && clear()
+
+    if (clear) clear()
  }

  cache.invalidiateUserList = true
@@ -1,6 +1,6 @@
 /*
 * server component for the TimeLimit App
- * Copyright (C) 2019 - 2022 Jonas Lochmann
+ * Copyright (C) 2019 - 2026 Jonas Lochmann
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
@@ -47,7 +47,8 @@ export async function dispatchSetChildPassword ({ action, cache }: {

  {
    const clear = cache.getSecondPasswordHashOfChild.cache.clear
-    clear && clear()
+
+    if (clear) clear()
  }

  cache.invalidiateUserList = true
@@ -1,6 +1,6 @@
 /*
 * server component for the TimeLimit App
- * Copyright (C) 2019 - 2024 Jonas Lochmann
+ * Copyright (C) 2019 - 2026 Jonas Lochmann
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
@@ -30,6 +30,7 @@ import { getDeviceDetailList } from './device-detail'
 import { getDeviceList } from './device-list'
 import { getDeviceDhKeys } from './dh-keys'
 import { getFamilyEntry } from './family-entry'
+import { getPings } from './pings'
 import { getUserList } from './user-list'
 import { getKeyRequests } from './key-requests'
 import { getKeyResponses } from './key-responses'
@@ -52,13 +53,14 @@ export const generateServerDataStatus = async ({
  const doesClientSupportCryptoApps = clientLevel >= 4
  const doesClientSupportDh = clientLevel >= 5
  const doesClientSupportU2f = clientLevel >= 6
+  const doesClientSupportPing = clientLevel >= 7

  const result: ServerDataStatus = {
    fullVersion: config.alwaysPro ? 1 : (
      familyEntry.hasFullVersion ? parseInt(familyEntry.fullVersionUntil, 10) : 0
    ),
    message: await getStatusMessage({ database, transaction }) || undefined,
-    apiLevel: 8
+    apiLevel: 9
  }

  if (familyEntry.deviceListVersion !== clientStatus.devices) {
@@ -160,5 +162,14 @@ export const generateServerDataStatus = async ({
    }) || undefined
  }

+  if (doesClientSupportPing) {
+    result.pings = await getPings({
+      database,
+      transaction,
+      familyEntry,
+      deviceId
+    })
+  }
+
  return result
 }
@@ -0,0 +1,52 @@
+/*
+ * server component for the TimeLimit App
+ * Copyright (C) 2019 - 2026 Jonas Lochmann
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import * as Sequelize from 'sequelize'
+import { Database } from '../../../database'
+import { types as pingTypes } from '../../../database/ping'
+import { ServerPing } from '../../../object/serverdatastatus'
+import { FamilyEntry } from './family-entry'
+
+export async function getPings ({
+  database, transaction, familyEntry, deviceId
+}: {
+  database: Database
+  transaction: Sequelize.Transaction
+  familyEntry: FamilyEntry
+  deviceId: string
+}): Promise<Array<ServerPing>> {
+  const savedData = await database.ping.findAll({
+    where: {
+      familyId: familyEntry.familyId,
+      receiverDeviceId: deviceId,
+    },
+    attributes: ['senderDeviceId', 'type', 'token'],
+    transaction
+  })
+
+  return savedData.map((row) => ({
+    deviceId: row.senderDeviceId,
+    type: convertType(row.type),
+    token: row.token
+  }))
+}
+
+function convertType(type: number): 'ping' | 'pong' {
+  if (type === pingTypes.ping) return 'ping'
+  else if (type === pingTypes.pong) return 'pong'
+  else throw new Error()
+}
@@ -1,6 +1,6 @@
 /*
 * server component for the TimeLimit App
- * Copyright (C) 2019 - 2022 Jonas Lochmann
+ * Copyright (C) 2019 - 2026 Jonas Lochmann
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
@@ -34,6 +34,7 @@ export interface ServerDataStatus {
  users?: ServerUserList  // newUserList
  krq?: Array<ServerKeyRequest> // pendingKeyRequests
  kr?: Array<ServerKeyResponse> // keyResponses
+  pings?: Array<ServerPing>
  dh?: ServerDhKey // Diffie Hellman
  u2f?: U2fData
  fullVersion: number     // fullVersionUntil
@@ -257,6 +258,12 @@ export interface ServerKeyResponse {
  signature: string
 }

+export interface ServerPing {
+  deviceId: string
+  token: string
+  type: 'ping' | 'pong'
+}
+
 export interface ServerDhKey {
  v: string // version
  k: string // key, base64
@@ -1,6 +1,6 @@
 /*
 * server component for the TimeLimit App
- * Copyright (C) 2019 - 2022 Jonas Lochmann
+ * Copyright (C) 2019 - 2026 Jonas Lochmann
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
@@ -56,7 +56,7 @@ export const createWebsocketHandler = ({ connectedDevicesManager, database }: {

      const importantSyncForAllListener = () => {
        setTimeout(() => {
-          socket.connected && socket.emit('should sync', { isImportant: true })
+          if (socket.connected) socket.emit('should sync', { isImportant: true })
        }, Math.random() * 1000 * 60 /* wait up to one minute */)
      }
Author	SHA1	Message	Date
Jonas Lochmann	3aed2010c7	Add ping support	2026-03-23 01:00:00 +01:00
Jonas Lochmann	510c61bafd	Adjust test scripts for current database versions	2026-03-23 01:00:00 +01:00
Jonas Lochmann	6fefd4cf18	Update dependencies	2026-03-23 01:00:00 +01:00
Jonas Lochmann	bedaa955b5	Update dependencies	2026-03-16 01:00:00 +01:00
Jonas Lochmann	a13656b27d	update eslint	2026-02-16 01:00:00 +01:00
Jonas Lochmann	abb2d1657e	Remove rimraf	2026-02-16 01:00:00 +01:00
Jonas Lochmann	47c4e866bf	Update ajv	2026-02-16 01:00:00 +01:00
Jonas Lochmann	65f1f8a410	Update Dependencies	2026-02-09 01:00:00 +01:00
Jonas Lochmann	c6c0051f82	Add dryRun parameter to the purchase api	2026-01-26 01:00:00 +01:00
Jonas Lochmann	6935c0811c	Update dependencies	2025-12-29 01:00:00 +01:00
jonas-l	66001b547f	Merge pull request 'chore: update base image to current node lts' (#43 ) from aveltens/timelimit-server:master into master Reviewed-on: https://codeberg.org/timelimit/timelimit-server/pulls/43	2025-12-29 08:29:03 +01:00
aveltens	c574fccda7	chore: update base image to current node lts	2025-12-28 20:23:12 +01:00
Jonas Lochmann	2cfa0babe1	Update dependencies	2025-12-01 01:00:00 +01:00