diff --git a/src/pages/DX4AppPage.jsx b/src/pages/DX4AppPage.jsx
index 4e20a29..c7331e4 100644
--- a/src/pages/DX4AppPage.jsx
+++ b/src/pages/DX4AppPage.jsx
@@ -24,7 +24,11 @@ import { useAtom } from "jotai";
 import { API_BASE_URL } from "../App";
 import { copyDXLink, ifstyle } from "../trash/helpers";
 import { useWebHaptics } from "web-haptics/react";
+import { DengiCaching } from "../trash/dengiCashingSystem";
 
+/**
+ * @param {{classIDAtom,adminAtom,setsetRoute,routeAtom,pickmeModeAtom,dengi_cash: DengiCaching}} param0
+ */
 export function DX4App({
   classIDAtom,
   adminAtom,
@@ -154,6 +158,9 @@ export function DX4App({
     })();
   }, [classId, adminId]);
 
+  /**
+   * @param {KeyboardEvent} event 
+   */
   const handleKeyPress = (event) => {
     switch (event.key) {
       case "a":
diff --git a/src/trash/dengi.js b/src/trash/dengi.js
index 7f60814..d3f525f 100644
--- a/src/trash/dengi.js
+++ b/src/trash/dengi.js
@@ -29,6 +29,9 @@ export const dateTagsList = {
   afterTomorrow: "послезавтра",
 };
 
+/**
+ * @param {Date} date
+ */
 export function getDateTags(date) {
   const x = new Date();
   x.setHours(0, 0, 0, 0);
@@ -38,18 +41,23 @@ export function getDateTags(date) {
   return diff === 0
     ? dateTagsList["today"]
     : diff === -1
-    ? dateTagsList["yesterday"]
-    : diff === 1
-    ? dateTagsList["tomorrow"]
-    : diff === 2
-    ? dateTagsList["afterTomorrow"]
-    : "";
+      ? dateTagsList["yesterday"]
+      : diff === 1
+        ? dateTagsList["tomorrow"]
+        : diff === 2
+          ? dateTagsList["afterTomorrow"]
+          : "";
 }
-
+/**
+ * Converts day of the week with 0 - sunday, to 0 - monday
+ * @param {number} usDay
+ */
 export function usToRussianDay(usDay) {
   return (usDay + 6) % 7;
 }
-
+/**
+ * @param {Date} date
+ */
 export function formatDate(date) {
   return `${
     dayOfWeeksNames[usToRussianDay(date.getDay())]
@@ -59,6 +67,9 @@ export function formatDate(date) {
       : ""
   }`;
 }
+/**
+ * @param {Date} date
+ */
 export function apiFormatDate(date) {
   return (
     ("0" + date.getDate()).slice(-2) +
@@ -68,6 +79,9 @@ export function apiFormatDate(date) {
     String(date.getFullYear()).slice(-2)
   );
 }
+/**
+ * @param {string} s
+ */
 export const parseApiDate = (s) => {
   const [d, m, y] = s.split("-").map(Number);
   const yy = 2000 + y;
@@ -83,6 +97,11 @@ export const apiToEditorVocabluary = {
   "t-end": "time2",
 };
 
+/**
+ * Converts api schedule data to editor format
+ * @param {{num: string|number; cabinet: string|number, subject: string, "t-begin": string, "t-end": string}[]} arr
+ * @returns {{position: string|number; room: string|number; subject: string, time1: string, time2: string}[]}
+ */
 export function convertApiToEditor(arr) {
   let uuid = Math.floor(Math.random() * 10000);
   return arr.map((item) => {
@@ -98,12 +117,17 @@ export function convertApiToEditor(arr) {
   });
 }
 
+/**
+ * Converts editor schedule data to api format
+ * @param {{position: string|number; room: string|number; subject: string, time1: string, time2: string}[]} arr
+ * @returns {{num: string|number; cabinet: string|number, subject: string, "t-begin": string, "t-end": string}[]}
+ */
 export function convertEditorToApi(arr) {
   const editorToApi = Object.fromEntries(
     Object.entries(apiToEditorVocabluary).map(([apiKey, editorKey]) => [
       editorKey,
       apiKey,
-    ])
+    ]),
   );
 
   return arr.reduce((acc, item) => {
@@ -130,7 +154,10 @@ export function convertEditorToApi(arr) {
     return acc;
   }, []);
 }
-
+/**
+ * Checks if time string (HH:MM) before now
+ * @param {string} timeStr
+ */
 export function isTimeBeforeNow(timeStr) {
   const [h, m] = timeStr.split(":").map(Number);
   if (!Number.isFinite(h) || !Number.isFinite(m)) return false;
@@ -142,7 +169,7 @@ export function isTimeBeforeNow(timeStr) {
     h,
     m,
     0,
-    0
+    0,
   );
   return t.getTime() < now.getTime();
 }
@@ -161,4 +188,7 @@ export const AvailableSymbols = (() => {
   return (a + n + A + s).split("");
 })();
 
-export const AvailableAdminSymbols = [...AvailableSymbols, ..."$()*^%@!+=.".split("")];
+export const AvailableAdminSymbols = [
+  ...AvailableSymbols,
+  ..."$()*^%@!+=.".split(""),
+];
diff --git a/src/trash/dengiCashingSystem.js b/src/trash/dengiCashingSystem.js
index c5403e5..a6539be 100644
--- a/src/trash/dengiCashingSystem.js
+++ b/src/trash/dengiCashingSystem.js
@@ -1,13 +1,8 @@
 export class DengiCaching {
-  vals = [
-    /*
-    {
-        name:"unique-id-name",
-        value:"somevalue",
-        expires=Date
-    }
-    */
-  ];
+  /**
+   * @type {{name: string, value: any, expires: Date}[]}
+   */
+  vals = [];
   constructor() {}
   tick() {
     this.vals.map((element, index) => {
@@ -18,6 +13,10 @@ export class DengiCaching {
       }
     });
   }
+  /**
+   * @param {string} name
+   * @param {()=>any} ifNotFound - function, would be called if value not found, returned value vould be stored
+   */
   withCache(name, ifNotFound) {
     this.tick();
     let a = this.get(name);
@@ -29,6 +28,10 @@ export class DengiCaching {
       return a;
     }
   }
+  /**
+   * @param {string} name
+   * @param {()=>any} ifNotFound - function, would be called if value not found, returned value vould be stored
+   */
   async withCacheAsync(name, ifNotFound) {
     this.tick();
     let a = this.get(name);
@@ -40,6 +43,10 @@ export class DengiCaching {
       return a;
     }
   }
+  /**
+   *
+   * @param  {...string} names
+   */
   delete(...names) {
     names.forEach((name) => {
       var index = this.vals.findIndex((a) => a.name == name);
@@ -52,15 +59,25 @@ export class DengiCaching {
   fullClear() {
     this.vals = [];
   }
+  /**
+   * @param {string} name
+   */
   wasCached(name) {
     this.tick();
     return this.vals.find((a) => a.name == name) !== undefined;
   }
+  /**
+   * @param {string} name
+   */
   get(name) {
     this.tick();
     const item = this.vals.find((a) => a.name === name);
     return item ? item.value : undefined;
   }
+  /**
+   * @param {string} name
+   * @param {any} val
+   */
   cache(name, val) {
     this.tick();
     this.vals.push({