diff --git a/.eslintrc.yaml b/.eslintrc.yaml
index 2ec963ed..a7712d72 100644
--- a/.eslintrc.yaml
+++ b/.eslintrc.yaml
@@ -11,6 +11,9 @@ parser: '@typescript-eslint/parser'
 plugins:
   - '@typescript-eslint'
   - simple-import-sort
+ignorePatterns:
+  - public/
+  - '*.spec.ts'
 rules:
   '@typescript-eslint/dot-notation': 0
   '@typescript-eslint/no-implied-eval': 0
@@ -24,7 +27,42 @@ rules:
     - error
     - always
     - exceptAfterSingleLine: true
-  '@typescript-eslint/naming-convention': 0
+  '@typescript-eslint/naming-convention':
+    - warn
+    - selector: default
+      format: [camelCase]
+      leadingUnderscore: allowSingleOrDouble
+    - selector: default
+      filter:
+        regex: '^([A-Z]|_+id|__call__)$'
+        match: true
+      format: null
+    - selector: variable
+      modifiers: [destructured]
+      filter:
+        regex: '^_id$'
+        match: false
+      format: [camelCase, PascalCase, UPPER_CASE, snake_case]
+    - selector: variable
+      format: [camelCase, PascalCase, UPPER_CASE]
+      modifiers: [const]
+      leadingUnderscore: allowSingleOrDouble
+    - selector: property
+      format: [camelCase, PascalCase, UPPER_CASE, snake_case]
+      leadingUnderscore: allowSingleOrDouble
+    - selector: [function, parameter, parameterProperty, objectLiteralMethod]
+      filter:
+        regex: __call__
+        match: false
+      format: [camelCase, PascalCase]
+      leadingUnderscore: allowSingleOrDouble
+    - selector: enum
+      format: [PascalCase]
+    - selector: [class, interface, typeAlias, enumMember]
+      format: [PascalCase, camelCase]
+    - selector: typeParameter
+      format: [camelCase, PascalCase, UPPER_CASE]
+
   '@typescript-eslint/no-redeclare': 0
 
   class-methods-use-this: 0
@@ -77,3 +115,7 @@ settings:
   import/resolver:
     typescript:
       alwaysTryTypes: true
+# parserOptions:
+#   project:
+#     - './tsconfig.json'
+#     - './packages/**/tsconfig.json'
\ No newline at end of file
diff --git a/packages/hydrojudge/package.json b/packages/hydrojudge/package.json
index 80615ebd..272c3a80 100644
--- a/packages/hydrojudge/package.json
+++ b/packages/hydrojudge/package.json
@@ -1,7 +1,7 @@
 {
     "name": "@hydrooj/hydrojudge",
     "bin": "bin/hydrojudge.js",
-    "version": "2.12.15",
+    "version": "2.12.16",
     "main": "package.json",
     "author": "undefined <i@undefined.moe>",
     "repository": "https://github.com/hydro-dev/Hydro.git",
diff --git a/packages/hydrojudge/src/cases.ts b/packages/hydrojudge/src/cases.ts
index 1f754071..8763e08f 100644
--- a/packages/hydrojudge/src/cases.ts
+++ b/packages/hydrojudge/src/cases.ts
@@ -189,8 +189,8 @@ function isValidConfig(config) {
     if (config.count > (getConfig('testcases_max') || 100)) {
         throw new FormatError('Too many testcases. Cancelled.');
     }
-    const total_time = sum(config.subtasks.map((subtask) => subtask.time * subtask.cases.length));
-    if (total_time > (getConfig('total_time_limit') || 60) * 1000) {
+    const time = sum(config.subtasks.map((subtask) => subtask.time * subtask.cases.length));
+    if (time > (getConfig('total_time_limit') || 60) * 1000) {
         throw new FormatError('Total time limit longer than {0}s. Cancelled.', [+getConfig('total_time_limit') || 60]);
     }
     const memMax = max(config.subtasks.map((subtask) => subtask.memory));
diff --git a/packages/hydrojudge/src/config.ts b/packages/hydrojudge/src/config.ts
index 589a6c05..51cdbab5 100644
--- a/packages/hydrojudge/src/config.ts
+++ b/packages/hydrojudge/src/config.ts
@@ -6,6 +6,7 @@ import fs from 'fs-extra';
 import yaml from 'js-yaml';
 
 const argv = cac().parse();
+// eslint-disable-next-line @typescript-eslint/naming-convention
 let CONFIG_FILE = path.resolve(os.homedir(), '.config', 'hydro', 'judge.yaml');
 
 let config = {
diff --git a/packages/hydrojudge/src/daemon.ts b/packages/hydrojudge/src/daemon.ts
index d347ec87..97ffdf4e 100644
--- a/packages/hydrojudge/src/daemon.ts
+++ b/packages/hydrojudge/src/daemon.ts
@@ -30,7 +30,7 @@ declare global {
 }
 if (!global.onDestory) global.onDestory = [];
 if (!global.hosts) global.hosts = [];
-let SI = false;
+let exit = false;
 
 const terminate = async () => {
     log.info('正在保存数据');
@@ -38,11 +38,11 @@ const terminate = async () => {
         await Promise.all(global.onDestory.map((f) => f()));
         process.exit(1);
     } catch (e) {
-        if (SI) process.exit(1);
+        if (exit) process.exit(1);
         log.error(e.stack);
         log.error('发生了错误。');
         log.error('再次按下 Ctrl-C 可强制退出。');
-        SI = true;
+        exit = true;
     }
 };
 process.on('SIGINT', terminate);
@@ -60,7 +60,7 @@ async function worker(queue: Queue<any>) {
 
 async function daemon() {
     const _hosts = getConfig('hosts');
-    const retry_delay_sec = getConfig('retry_delay_sec');
+    const delay = getConfig('retry_delay_sec');
     const hosts = {};
     const queue = new Queue<any>();
     for (const i in _hosts) {
@@ -77,8 +77,8 @@ async function daemon() {
                 break;
             } catch (e) {
                 log.error(e, e.stack);
-                log.info(`在 ${retry_delay_sec} 秒后重试`);
-                await sleep(retry_delay_sec * 1000);
+                log.info(`在 ${delay} 秒后重试`);
+                await sleep(delay * 1000);
             }
         }
     }
diff --git a/packages/hydrojudge/src/sandbox.ts b/packages/hydrojudge/src/sandbox.ts
index 686a97d8..906cfdb6 100644
--- a/packages/hydrojudge/src/sandbox.ts
+++ b/packages/hydrojudge/src/sandbox.ts
@@ -27,7 +27,7 @@ function proc({
     execute = '',
     time = 16000,
     memory = parseMemoryMB(getConfig('memoryMax')),
-    process_limit = getConfig('processLimit'),
+    processLimit = getConfig('processLimit'),
     stdin = '', copyIn = {}, copyOut = [], copyOutCached = [],
 } = {}) {
     if (!supportOptional) {
@@ -48,7 +48,7 @@ function proc({
         memoryLimit: Math.floor(memory * 1024 * 1024),
         strictMemoryLimit: getConfig('strict_memory'),
         // stackLimit: memory * 1024 * 1024,
-        procLimit: process_limit,
+        procLimit: processLimit,
         copyIn,
         copyOut,
         copyOutCached,
diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index bdbc359b..9525863d 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "3.3.10",
+    "version": "3.3.11",
     "bin": "bin/hydrooj.js",
     "main": "src/loader",
     "module": "src/loader",
diff --git a/packages/hydrooj/src/handler/import.ts b/packages/hydrooj/src/handler/import.ts
index 22e8af6b..0b013659 100644
--- a/packages/hydrooj/src/handler/import.ts
+++ b/packages/hydrooj/src/handler/import.ts
@@ -49,13 +49,13 @@ async function syzojSync(info) {
             memory: `${judge.memoryLimit}m`,
         };
         if (judge.extraSourceFiles) {
-            const user_extra_files = [];
+            const files = [];
             for (const key in judge.extraSourceFiles) {
                 for (const file in judge.extraSourceFiles[key]) {
-                    user_extra_files.push(file);
+                    files.push(file);
                 }
             }
-            config.user_extra_files = user_extra_files;
+            config.user_extra_files = files;
         }
         if (judge.checker?.type === 'custom') {
             config.checker_type = judge.checker.interface;
diff --git a/packages/hydrooj/src/handler/problem.ts b/packages/hydrooj/src/handler/problem.ts
index 8f346528..9e77b77d 100644
--- a/packages/hydrooj/src/handler/problem.ts
+++ b/packages/hydrooj/src/handler/problem.ts
@@ -501,12 +501,12 @@ export class ProblemFilesHandler extends ProblemDetailHandler {
         this.response.body.additional_file = getAdditionalFile ? sortFiles(this.pdoc.additional_file || []) : [];
         if (pjax) {
             const { testdata, additional_file } = this.response.body;
-            const owner_udoc = await user.getById(domainId, this.pdoc.owner);
+            const owner = await user.getById(domainId, this.pdoc.owner);
             this.response.body = {
                 fragments: (await Promise.all([
                     this.renderHTML('partials/problem_files-testdata.html', { testdata, pdoc: this.pdoc }),
                     this.renderHTML('partials/problem_files-additional_file.html', { additional_file, pdoc: this.pdoc }),
-                    this.renderHTML('partials/problem-sidebar-information.html', { pdoc: this.pdoc, owner_udoc }),
+                    this.renderHTML('partials/problem-sidebar-information.html', { pdoc: this.pdoc, owner_udoc: owner }),
                 ])).map((i) => ({ html: i })),
             };
             this.response.template = '';
diff --git a/packages/hydrooj/src/lib/difficulty.ts b/packages/hydrooj/src/lib/difficulty.ts
index 219ee3ca..d2f06652 100644
--- a/packages/hydrooj/src/lib/difficulty.ts
+++ b/packages/hydrooj/src/lib/difficulty.ts
@@ -1,44 +1,44 @@
 const _CACHE_INFO = {
-    last_s: 0.0,
-    last_y: 0,
+    s: 0.0,
+    y: 0,
     values: [0.0],
 };
 
 function _LOGP(x: number) {
-    const sqrt_2_pi = 2.506628274631000502415765284811; // Sqrt[Pi]
-    return (2 * Math.exp(-1.0 * (Math.log(x) ** 2) * 2)) / x / sqrt_2_pi;
+    const sqrtPi = 2.506628274631000502415765284811; // Sqrt[Pi]
+    return (2 * Math.exp(-1.0 * (Math.log(x) ** 2) * 2)) / x / sqrtPi;
 }
 
-function _integrate_ensure_cache(y: number) {
-    let last_y = _CACHE_INFO.last_y;
-    if (y <= last_y) return _CACHE_INFO;
-    let s = _CACHE_INFO.last_s;
+function _intergrateEnsureCache(y: number) {
+    let lastY = _CACHE_INFO.y;
+    if (y <= lastY) return _CACHE_INFO;
+    let s = _CACHE_INFO.s;
     const dx = 0.1;
     const dT = 2;
-    let x0 = (last_y / dT) * dx;
-    while (y > last_y) {
+    let x0 = (lastY / dT) * dx;
+    while (y > lastY) {
         x0 += dx;
         s += _LOGP(x0) * dx;
         for (let i = 1; i <= dT; i++) _CACHE_INFO.values.push(s);
-        last_y += dT;
+        lastY += dT;
     }
-    _CACHE_INFO.last_y = last_y;
-    _CACHE_INFO.last_s = s;
+    _CACHE_INFO.y = lastY;
+    _CACHE_INFO.s = s;
     return _CACHE_INFO;
 }
 
-_integrate_ensure_cache(1000000);
+_intergrateEnsureCache(1000000);
 
 function _integrate(y: number) {
-    _integrate_ensure_cache(y);
+    _intergrateEnsureCache(y);
     return _CACHE_INFO.values[y];
 }
 
 function difficultyAlgorithm(nSubmit: number, nAccept: number) {
     if (!nSubmit) return null;
     const s = _integrate(nSubmit);
-    const ac_rate = nAccept / nSubmit;
-    const ans = Math.round(10.0 - 1.30 * s * 10.0 * ac_rate);
+    const acRate = nAccept / nSubmit;
+    const ans = Math.round(10.0 - 1.30 * s * 10.0 * acRate);
     return Math.max(ans, 1);
 }
 
diff --git a/packages/hydrooj/src/lib/rating.ts b/packages/hydrooj/src/lib/rating.ts
index d969f692..f4f0f792 100644
--- a/packages/hydrooj/src/lib/rating.ts
+++ b/packages/hydrooj/src/lib/rating.ts
@@ -103,16 +103,16 @@ interface RatingOutputUser {
 }
 
 function calculate(users: RatingInputUser[]): RatingOutputUser[] {
-    let last_idx = 0;
-    let last_rank = 1;
+    let lastIdx = 0;
+    let lastRank = 1;
     for (let i = 1; i < users.length; i++) {
-        if (users[i].rank > last_rank) {
-            for (let j = last_idx; j < i; j++) users[j].rank = i;
-            last_idx = i;
-            last_rank = users[i].rank;
+        if (users[i].rank > lastRank) {
+            for (let j = lastIdx; j < i; j++) users[j].rank = i;
+            lastIdx = i;
+            lastRank = users[i].rank;
         }
     }
-    for (let i = last_idx; i < users.length; i++) {
+    for (let i = lastIdx; i < users.length; i++) {
         users[i].rank = users.length;
     }
     const calculator = new RatingCalculator(users);
diff --git a/packages/hydrooj/src/service/monitor.ts b/packages/hydrooj/src/service/monitor.ts
index 77b0deac..15ed8b71 100644
--- a/packages/hydrooj/src/service/monitor.ts
+++ b/packages/hydrooj/src/service/monitor.ts
@@ -56,7 +56,8 @@ export async function feedback(): Promise<[string, StatusUpdate]> {
     superagent.post(`${system.get('server.center')}/report`)
         .send({ installId, payload })
         .then((res) => {
-            if (res.body.updateUrl) system.set('server.center', res.body.updateUrl);
+            if (res.body.updateUrl?.startsWith('https://')) system.set('server.center', res.body.updateUrl);
+            if (res.body.notification) global.Hydro.model.message.sendNotification(res.body.notification);
         })
         .catch(() => logger.debug('Cannot connect to hydro center.'));
     return [mid, $update];
diff --git a/packages/hydrooj/src/upgrade.ts b/packages/hydrooj/src/upgrade.ts
index 15ce4685..1d7b9750 100644
--- a/packages/hydrooj/src/upgrade.ts
+++ b/packages/hydrooj/src/upgrade.ts
@@ -1,5 +1,6 @@
 /* eslint-disable @typescript-eslint/no-unused-vars */
 /* eslint-disable no-await-in-loop */
+/* eslint-disable @typescript-eslint/naming-convention */
 import AdmZip from 'adm-zip';
 import yaml from 'js-yaml';
 import { pick } from 'lodash';
diff --git a/packages/import-qduoj/handler.ts b/packages/import-qduoj/handler.ts
index cd7e8c2c..d34319ad 100644
--- a/packages/import-qduoj/handler.ts
+++ b/packages/import-qduoj/handler.ts
@@ -15,7 +15,7 @@ import { Handler, Route } from 'hydrooj/src/service/server';
 fs.ensureDirSync('/tmp/hydro/import-qduoj');
 
 class ImportQduojHandler extends Handler {
-    async ImportFromFile(domainId: string, zipfile: string) {
+    async fromFile(domainId: string, zipfile: string) {
         const zip = new AdmZip(zipfile);
         const tmp = path.resolve(os.tmpdir(), 'hydro', 'import-qduoj', String.random(32));
         await new Promise((resolve, reject) => {
@@ -121,7 +121,7 @@ class ImportQduojHandler extends Handler {
         if (!this.request.files.file) throw new ValidationError('file');
         const stat = await fs.stat(this.request.files.file.path);
         if (stat.size > 128 * 1024 * 1024) throw new ValidationError('file', 'File too large');
-        await this.ImportFromFile(domainId, this.request.files.file.path);
+        await this.fromFile(domainId, this.request.files.file.path);
         this.response.redirect = this.url('problem_main');
     }
 }
diff --git a/packages/import-qduoj/package.json b/packages/import-qduoj/package.json
index f98f2c14..65218006 100644
--- a/packages/import-qduoj/package.json
+++ b/packages/import-qduoj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@hydrooj/import-qduoj",
-    "version": "1.3.2",
+    "version": "1.3.3",
     "description": "Import QDUOJ problem export",
     "main": "package.json",
     "repository": "https://github.com/hydro-dev/Hydro.git",
diff --git a/packages/vjudge/package.json b/packages/vjudge/package.json
index e2dec7c6..5b5df94c 100644
--- a/packages/vjudge/package.json
+++ b/packages/vjudge/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@hydrooj/vjudge",
-    "version": "1.4.11",
+    "version": "1.4.12",
     "description": "Submit problems to remote oj",
     "main": "package.json",
     "repository": "https://github.com/hydro-dev/Hydro.git",
diff --git a/packages/vjudge/src/providers/codeforces.ts b/packages/vjudge/src/providers/codeforces.ts
index e1cab7b1..76730679 100644
--- a/packages/vjudge/src/providers/codeforces.ts
+++ b/packages/vjudge/src/providers/codeforces.ts
@@ -74,9 +74,8 @@ export default class CodeforcesProvider implements IBasicProvider {
     async ensureLogin() {
         if (await this.loggedIn) return true;
         logger.info('retry login');
-        const csrf_token = await this.getCsrfToken('/enter');
         const res = await this.post('/enter').send({
-            csrf_token,
+            csrf_token: await this.getCsrfToken('/enter'),
             action: 'enter',
             ftaa: '',
             bfaa: '',
@@ -197,10 +196,10 @@ export default class CodeforcesProvider implements IBasicProvider {
         const [, contestId, submittedProblemIndex] = id.startsWith('P921')
             ? ['', '921', id.split('P921')[1]]
             : /^P(\d+)([A-Z][0-9]*)$/.exec(id);
-        const csrf_token = await this.getCsrfToken('/problemset/submit');
+        const csrf = await this.getCsrfToken('/problemset/submit');
         // TODO check submit time to ensure submission
-        await this.post(`/problemset/submit?csrf_token=${csrf_token}`).send({
-            csrf_token,
+        await this.post(`/problemset/submit?csrf_token=${csrf}`).send({
+            csrf_token: csrf,
             contestId,
             action: 'submitSolutionFormSubmitted',
             programTypeId,