diff --git a/packages/core/package.json b/packages/core/package.json
index eca113cb..d0ddda85 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -8,7 +8,7 @@
     "main": "src/index.ts",
     "type": "module",
     "scripts": {
-        "build": "pnpm run -w build-package mtcute",
+        "build": "pnpm run -w build-package core",
         "gen-client": "node ./scripts/generate-client.cjs",
         "gen-updates": "node ./scripts/generate-updates.cjs"
     },
diff --git a/packages/core/src/highlevel/base.ts b/packages/core/src/highlevel/base.ts
index 21636414..6a30db75 100644
--- a/packages/core/src/highlevel/base.ts
+++ b/packages/core/src/highlevel/base.ts
@@ -1,3 +1,4 @@
+/* eslint-disable @typescript-eslint/require-await */
 import { tl } from '@mtcute/tl'
 
 import { MtClient, MtClientOptions } from '../network/client.js'
@@ -5,7 +6,14 @@ import { ConnectionKind, RpcCallOptions } from '../network/network-manager.js'
 import { StorageManagerExtraOptions } from '../storage/storage.js'
 import { MtArgumentError } from '../types/errors.js'
 import { MustEqual } from '../types/utils.js'
-import { asyncResettable, computeNewPasswordHash, computeSrpParams, readStringSession, StringSessionData, writeStringSession } from '../utils/index.js'
+import {
+    asyncResettable,
+    computeNewPasswordHash,
+    computeSrpParams,
+    readStringSession,
+    StringSessionData,
+    writeStringSession,
+} from '../utils/index.js'
 import { LogManager } from '../utils/logger.js'
 import { ITelegramClient } from './client.types.js'
 import { ITelegramStorageProvider } from './storage/provider.js'
@@ -29,7 +37,7 @@ export class BaseTelegramClient implements ITelegramClient {
             this._serverUpdatesHandler = this.updates.handleUpdate.bind(this.updates)
         }
 
-        this.mt.on('update', (update) => {
+        this.mt.on('update', (update: tl.TypeUpdates) => {
             this._serverUpdatesHandler(update)
         })
     }
@@ -272,16 +280,10 @@ export class BaseTelegramClient implements ITelegramClient {
         return this.mt.network.getPrimaryDcId()
     }
 
-    computeSrpParams(
-        request: tl.account.RawPassword,
-        password: string,
-    ): Promise<tl.RawInputCheckPasswordSRP> {
+    computeSrpParams(request: tl.account.RawPassword, password: string): Promise<tl.RawInputCheckPasswordSRP> {
         return computeSrpParams(this.crypto, request, password)
     }
-    computeNewPasswordHash(
-        algo: tl.TypePasswordKdfAlgo,
-        password: string,
-    ): Promise<Uint8Array> {
+    computeNewPasswordHash(algo: tl.TypePasswordKdfAlgo, password: string): Promise<Uint8Array> {
         return computeNewPasswordHash(this.crypto, algo, password)
     }
 }
diff --git a/packages/core/src/highlevel/client.ts b/packages/core/src/highlevel/client.ts
index c0534745..38221542 100644
--- a/packages/core/src/highlevel/client.ts
+++ b/packages/core/src/highlevel/client.ts
@@ -4917,7 +4917,7 @@ export interface TelegramClient extends ITelegramClient {
      * **Available**: ✅ both users and bots
      *
      */
-    getMyUsername(): string | null
+    getMyUsername(): Promise<string | null>
     /**
      * Get a single profile picture of a user by its ID
      *
diff --git a/packages/core/src/highlevel/methods/messages/send-text.test.ts b/packages/core/src/highlevel/methods/messages/send-text.test.ts
index 7066817a..bcf44d99 100644
--- a/packages/core/src/highlevel/methods/messages/send-text.test.ts
+++ b/packages/core/src/highlevel/methods/messages/send-text.test.ts
@@ -103,7 +103,7 @@ describe('sendText', () => {
     it('should correctly handle updateShortSentMessage with cached peer', async () => {
         const client = new StubTelegramClient()
 
-        client.storage.self.store({
+        await client.storage.self.store({
             userId: stubUser.id,
             isBot: false,
             isPremium: false,
@@ -132,7 +132,7 @@ describe('sendText', () => {
     it('should correctly handle updateShortSentMessage without cached peer', async () => {
         const client = new StubTelegramClient()
 
-        client.storage.self.store({
+        await client.storage.self.store({
             userId: stubUser.id,
             isBot: false,
             isPremium: false,
diff --git a/packages/core/src/highlevel/methods/users/get-my-username.ts b/packages/core/src/highlevel/methods/users/get-my-username.ts
index c654d1a3..1f78faa9 100644
--- a/packages/core/src/highlevel/methods/users/get-my-username.ts
+++ b/packages/core/src/highlevel/methods/users/get-my-username.ts
@@ -6,7 +6,6 @@ import { ITelegramClient } from '../../client.types.js'
  * This method uses locally available information and
  * does not call any API methods.
  */
-export function getMyUsername(client: ITelegramClient): string | null {
-    throw new Error('Not implemented')
-    // return getAuthState(client).selfUsername
+export async function getMyUsername(client: ITelegramClient): Promise<string | null> {
+    return client.storage.self.fetch().then((self) => self?.usernames[0] ?? null)
 }
diff --git a/packages/core/src/highlevel/methods/users/set-my-username.ts b/packages/core/src/highlevel/methods/users/set-my-username.ts
index 72b8524b..15a2bb2f 100644
--- a/packages/core/src/highlevel/methods/users/set-my-username.ts
+++ b/packages/core/src/highlevel/methods/users/set-my-username.ts
@@ -17,7 +17,7 @@ export async function setMyUsername(client: ITelegramClient, username: string |
         username,
     })
 
-    client.storage.self.update({ username })
+    await client.storage.self.update({ username })
 
     return new User(res)
 }
diff --git a/packages/core/src/highlevel/storage/service/current-user.ts b/packages/core/src/highlevel/storage/service/current-user.ts
index eb96443f..6b9a9a32 100644
--- a/packages/core/src/highlevel/storage/service/current-user.ts
+++ b/packages/core/src/highlevel/storage/service/current-user.ts
@@ -63,7 +63,7 @@ function parse(data: Uint8Array): CurrentUserInfo | null {
 
     if (flags & 2) {
         const len = reader.int()
-        usernames = new Array(len)
+        usernames = new Array<string>(len)
 
         for (let i = 0; i < len; i++) {
             usernames[i] = reader.string()
@@ -143,11 +143,7 @@ export class CurrentUserService extends BaseService {
         return this._cached
     }
 
-    async update(params: {
-        username?: string
-        usernames?: string[]
-        isPremium?: boolean
-    }): Promise<void> {
+    async update(params: { username?: string; usernames?: string[]; isPremium?: boolean }): Promise<void> {
         const info = await this.fetch()
         if (!info) return
 
diff --git a/packages/core/src/highlevel/worker/errors.ts b/packages/core/src/highlevel/worker/errors.ts
index 7c650c29..288f15d0 100644
--- a/packages/core/src/highlevel/worker/errors.ts
+++ b/packages/core/src/highlevel/worker/errors.ts
@@ -94,7 +94,7 @@ export function deserializeError(error: SerializedError): Error {
             for (const key in custom) {
                 if (key === 'code' || key === 'text') continue
                 // @ts-expect-error lol
-                err2[key] = custom[key]
+                err2[key] = custom[key] // eslint-disable-line
             }
             break
         }
diff --git a/packages/core/src/highlevel/worker/invoker.ts b/packages/core/src/highlevel/worker/invoker.ts
index a2b644cf..424a5d89 100644
--- a/packages/core/src/highlevel/worker/invoker.ts
+++ b/packages/core/src/highlevel/worker/invoker.ts
@@ -8,14 +8,9 @@ export class WorkerInvoker {
     constructor(private send: SendFn) {}
 
     private _nextId = 0
-    private _pending = new Map<number, ControllablePromise<unknown>>()
+    private _pending = new Map<number, ControllablePromise>()
 
-    private _invoke(
-        target: InvokeTarget,
-        method: string,
-        args: unknown[],
-        isVoid: boolean,
-    ) {
+    private _invoke(target: InvokeTarget, method: string, args: unknown[], isVoid: boolean) {
         const id = this._nextId++
 
         this.send({
@@ -36,15 +31,12 @@ export class WorkerInvoker {
         }
     }
 
-    invoke(
-        target: InvokeTarget,
-        method: string,
-        args: unknown[],
-    ): Promise<unknown> {
+    invoke(target: InvokeTarget, method: string, args: unknown[]): Promise<unknown> {
         return this._invoke(target, method, args, false) as Promise<unknown>
     }
 
     invokeVoid(target: InvokeTarget, method: string, args: unknown[]): void {
+        // eslint-disable-next-line @typescript-eslint/no-floating-promises
         this._invoke(target, method, args, true)
     }
 
diff --git a/packages/core/src/highlevel/worker/platform/connect.web.ts b/packages/core/src/highlevel/worker/platform/connect.web.ts
index b77e468a..b22db3b0 100644
--- a/packages/core/src/highlevel/worker/platform/connect.web.ts
+++ b/packages/core/src/highlevel/worker/platform/connect.web.ts
@@ -6,6 +6,7 @@ export function connectToWorker(worker: SomeWorker, handler: ClientMessageHandle
         const send: SendFn = worker.postMessage.bind(worker)
 
         const messageHandler = (ev: MessageEvent) => {
+            // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
             handler(ev.data)
         }
 
@@ -37,6 +38,7 @@ export function connectToWorker(worker: SomeWorker, handler: ClientMessageHandle
                 return
             }
 
+            // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
             handler(ev.data)
         }
 
diff --git a/packages/core/src/highlevel/worker/platform/register.ts b/packages/core/src/highlevel/worker/platform/register.ts
index b64091a3..f680a46e 100644
--- a/packages/core/src/highlevel/worker/platform/register.ts
+++ b/packages/core/src/highlevel/worker/platform/register.ts
@@ -16,6 +16,7 @@ export function registerWorker(handler: WorkerMessageHandler): RespondFn {
 
     const respond: RespondFn = port.postMessage.bind(port)
 
+    // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
     parentPort.on('message', (message) => handler(message, respond))
 
     return respond
diff --git a/packages/core/src/highlevel/worker/platform/register.web.ts b/packages/core/src/highlevel/worker/platform/register.web.ts
index 196f0019..3e55208c 100644
--- a/packages/core/src/highlevel/worker/platform/register.web.ts
+++ b/packages/core/src/highlevel/worker/platform/register.web.ts
@@ -10,6 +10,7 @@ export function registerWorker(handler: WorkerMessageHandler): RespondFn {
     if (typeof WorkerGlobalScope !== 'undefined' && self instanceof WorkerGlobalScope) {
         const respond: RespondFn = self.postMessage.bind(self)
 
+        // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
         self.addEventListener('message', (message) => handler(message.data, respond))
 
         return respond
@@ -53,7 +54,7 @@ export function registerWorker(handler: WorkerMessageHandler): RespondFn {
             // so even if the browser has suspended the timers, we should still get a ping within a minute
             let timeout = setTimeout(onTimeout, 60000)
 
-            port.addEventListener('message', async (message) => {
+            port.addEventListener('message', (message) => {
                 if (message.data.__type__ === 'close') {
                     onClose()
 
@@ -67,6 +68,7 @@ export function registerWorker(handler: WorkerMessageHandler): RespondFn {
                     return
                 }
 
+                // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
                 handler(message.data, respond)
             })
         }
diff --git a/packages/core/src/highlevel/worker/port.ts b/packages/core/src/highlevel/worker/port.ts
index 2b0a6db4..f3fbd6cd 100644
--- a/packages/core/src/highlevel/worker/port.ts
+++ b/packages/core/src/highlevel/worker/port.ts
@@ -72,14 +72,11 @@ export class TelegramWorkerPort<Custom extends WorkerCustomMethods> implements I
         this._destroyed = true
 
         if (terminate && 'terminate' in this.options.worker) {
-            this.options.worker.terminate()
+            Promise.resolve(this.options.worker.terminate()).catch(() => {})
         }
     }
 
-    invokeCustom<T extends keyof Custom>(
-        method: T,
-        ...args: Parameters<Custom[T]>
-    ): Promise<ReturnType<Custom[T]>> {
+    invokeCustom<T extends keyof Custom>(method: T, ...args: Parameters<Custom[T]>): Promise<ReturnType<Custom[T]>> {
         return this._invoker.invoke('custom', method as string, args) as Promise<ReturnType<Custom[T]>>
     }
 
diff --git a/packages/core/src/highlevel/worker/worker.ts b/packages/core/src/highlevel/worker/worker.ts
index 06eb89a0..33513946 100644
--- a/packages/core/src/highlevel/worker/worker.ts
+++ b/packages/core/src/highlevel/worker/worker.ts
@@ -45,6 +45,7 @@ export function makeTelegramWorker<T extends WorkerCustomMethods>(params: Telegr
             }
         }
 
+        // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
         const method = target[msg.method]
 
         if (!method) {
@@ -57,6 +58,7 @@ export function makeTelegramWorker<T extends WorkerCustomMethods>(params: Telegr
             return
         }
 
+        // eslint-disable-next-line @typescript-eslint/no-unsafe-call
         Promise.resolve(method.apply(target, msg.args))
             .then((res) => {
                 if (msg.void) return
diff --git a/packages/core/src/storage/providers/idb/idb.test.ts b/packages/core/src/storage/providers/idb/idb.test.ts
index bf6b0ded..a05ddde3 100644
--- a/packages/core/src/storage/providers/idb/idb.test.ts
+++ b/packages/core/src/storage/providers/idb/idb.test.ts
@@ -1,9 +1,12 @@
 import { afterAll, beforeAll, describe } from 'vitest'
 
-import { testPeersRepository } from '../../../highlevel/storage/repository/peers.test-utils.js'
-import { testRefMessagesRepository } from '../../../highlevel/storage/repository/ref-messages.test-utils.js'
-import { testAuthKeysRepository } from '../../repository/auth-keys.test-utils.js'
-import { testKeyValueRepository } from '../../repository/key-value.test-utils.js'
+import {
+    testAuthKeysRepository,
+    testKeyValueRepository,
+    testPeersRepository,
+    testRefMessagesRepository,
+} from '@mtcute/test'
+
 import { IdbStorage } from './index.js'
 
 if (import.meta.env.TEST_ENV === 'browser') {
@@ -20,7 +23,7 @@ if (import.meta.env.TEST_ENV === 'browser') {
         testRefMessagesRepository(storage.refMessages, storage.driver)
 
         afterAll(async () => {
-            storage.driver.destroy()
+            await storage.driver.destroy()
 
             const req = indexedDB.deleteDatabase(idbName)
             await new Promise<void>((resolve, reject) => {
diff --git a/packages/core/src/storage/providers/idb/repository/auth-keys.ts b/packages/core/src/storage/providers/idb/repository/auth-keys.ts
index daad181e..a2fb7474 100644
--- a/packages/core/src/storage/providers/idb/repository/auth-keys.ts
+++ b/packages/core/src/storage/providers/idb/repository/auth-keys.ts
@@ -39,7 +39,7 @@ export class IdbAuthKeysRepository implements IAuthKeysRepository {
     async get(dc: number): Promise<Uint8Array | null> {
         const os = this.os()
 
-        const it = await reqToPromise<AuthKeyDto>(os.get(dc))
+        const it = await reqToPromise<AuthKeyDto>(os.get(dc) as IDBRequest<AuthKeyDto>)
         if (it === undefined) return null
 
         return it.key
@@ -61,7 +61,7 @@ export class IdbAuthKeysRepository implements IAuthKeysRepository {
 
     async getTemp(dc: number, idx: number, now: number): Promise<Uint8Array | null> {
         const os = this.osTemp()
-        const row = await reqToPromise<TempAuthKeyDto>(os.get([dc, idx]))
+        const row = await reqToPromise<TempAuthKeyDto>(os.get([dc, idx]) as IDBRequest<TempAuthKeyDto>)
 
         if (row === undefined || row.expiresAt! < now) return null
 
diff --git a/packages/core/src/storage/providers/idb/repository/kv.ts b/packages/core/src/storage/providers/idb/repository/kv.ts
index 813a05d8..94e58b5f 100644
--- a/packages/core/src/storage/providers/idb/repository/kv.ts
+++ b/packages/core/src/storage/providers/idb/repository/kv.ts
@@ -25,7 +25,7 @@ export class IdbKvRepository implements IKeyValueRepository {
 
     async get(key: string): Promise<Uint8Array | null> {
         const os = this.os()
-        const res = await reqToPromise<KeyValueDto>(os.get(key))
+        const res = await reqToPromise<KeyValueDto>(os.get(key) as IDBRequest<KeyValueDto>)
         if (res === undefined) return null
 
         return res.value
diff --git a/packages/core/src/storage/providers/idb/repository/peers.ts b/packages/core/src/storage/providers/idb/repository/peers.ts
index 4197a3f7..010a27d1 100644
--- a/packages/core/src/storage/providers/idb/repository/peers.ts
+++ b/packages/core/src/storage/providers/idb/repository/peers.ts
@@ -22,19 +22,21 @@ export class IdbPeersRepository implements IPeersRepository {
     }
 
     async getById(id: number): Promise<IPeersRepository.PeerInfo | null> {
-        const it = await reqToPromise(this.os().get(id))
+        const it = await reqToPromise(this.os().get(id) as IDBRequest<IPeersRepository.PeerInfo>)
 
         return it ?? null
     }
 
     async getByUsername(username: string): Promise<IPeersRepository.PeerInfo | null> {
-        const it = await reqToPromise(this.os().index('by_username').get(username))
+        const it = await reqToPromise(
+            this.os().index('by_username').get(username) as IDBRequest<IPeersRepository.PeerInfo>,
+        )
 
         return it ?? null
     }
 
     async getByPhone(phone: string): Promise<IPeersRepository.PeerInfo | null> {
-        const it = await reqToPromise(this.os().index('by_phone').get(phone))
+        const it = await reqToPromise(this.os().index('by_phone').get(phone) as IDBRequest<IPeersRepository.PeerInfo>)
 
         return it ?? null
     }
diff --git a/packages/core/src/storage/providers/idb/repository/ref-messages.ts b/packages/core/src/storage/providers/idb/repository/ref-messages.ts
index 276ab833..b7c18a17 100644
--- a/packages/core/src/storage/providers/idb/repository/ref-messages.ts
+++ b/packages/core/src/storage/providers/idb/repository/ref-messages.ts
@@ -33,7 +33,7 @@ export class IdbRefMsgRepository implements IReferenceMessagesRepository {
         const os = this.os()
         const index = os.index('by_peer')
 
-        const it = await reqToPromise<MessageRefDto>(index.get(peerId))
+        const it = await reqToPromise<MessageRefDto>(index.get(peerId) as IDBRequest<MessageRefDto>)
         if (!it) return null
 
         return [it.chatId, it.msgId]
diff --git a/packages/core/src/storage/providers/memory/memory.test.ts b/packages/core/src/storage/providers/memory/memory.test.ts
index 36c889c8..03b6a2b8 100644
--- a/packages/core/src/storage/providers/memory/memory.test.ts
+++ b/packages/core/src/storage/providers/memory/memory.test.ts
@@ -1,9 +1,12 @@
 import { describe } from 'vitest'
 
-import { testPeersRepository } from '../../../highlevel/storage/repository/peers.test-utils.js'
-import { testRefMessagesRepository } from '../../../highlevel/storage/repository/ref-messages.test-utils.js'
-import { testAuthKeysRepository } from '../../repository/auth-keys.test-utils.js'
-import { testKeyValueRepository } from '../../repository/key-value.test-utils.js'
+import {
+    testAuthKeysRepository,
+    testKeyValueRepository,
+    testPeersRepository,
+    testRefMessagesRepository,
+} from '@mtcute/test'
+
 import { MemoryStorage } from './index.js'
 
 describe('memory storage', () => {
diff --git a/packages/core/src/storage/repository/index.ts b/packages/core/src/storage/repository/index.ts
index 613574b8..e21bb0df 100644
--- a/packages/core/src/storage/repository/index.ts
+++ b/packages/core/src/storage/repository/index.ts
@@ -1,4 +1,2 @@
-export * from '../../highlevel/storage/repository/peers.js'
-export * from '../../highlevel/storage/repository/ref-messages.js'
 export * from './auth-keys.js'
 export * from './key-value.js'
diff --git a/packages/core/src/storage/service/auth-keys.test.ts b/packages/core/src/storage/service/auth-keys.test.ts
index 405a1732..f8d8d22d 100644
--- a/packages/core/src/storage/service/auth-keys.test.ts
+++ b/packages/core/src/storage/service/auth-keys.test.ts
@@ -1,7 +1,7 @@
 import { describe, expect, it, vi } from 'vitest'
 
-import { fakeAuthKeysRepository } from '../repository/auth-keys.test-utils.js'
-import { fakeKeyValueRepository } from '../repository/key-value.test-utils.js'
+import { fakeAuthKeysRepository, fakeKeyValueRepository } from '@mtcute/test'
+
 import { AuthKeysService } from './auth-keys.js'
 import { FutureSaltsService } from './future-salts.js'
 import { testServiceOptions } from './utils.test-utils.js'
diff --git a/packages/core/src/storage/service/updates.test.ts b/packages/core/src/storage/service/updates.test.ts
index 82c3e699..ad8c9bcf 100644
--- a/packages/core/src/storage/service/updates.test.ts
+++ b/packages/core/src/storage/service/updates.test.ts
@@ -1,6 +1,7 @@
 import { describe, expect, it, vi } from 'vitest'
 
-import { fakeKeyValueRepository } from '../repository/key-value.test-utils.js'
+import { fakeKeyValueRepository } from '@mtcute/test'
+
 import { UpdatesStateService } from '../../highlevel/storage/service/updates.js'
 import { testServiceOptions } from './utils.test-utils.js'
 
@@ -73,10 +74,7 @@ describe('updates state service', () => {
         it('should write to updates_channel:xxx key', async () => {
             await service.setChannelPts(123, 0x04030201)
 
-            expect(kv.set).toHaveBeenCalledWith(
-                'updates_channel:123',
-                new Uint8Array([1, 2, 3, 4]),
-            )
+            expect(kv.set).toHaveBeenCalledWith('updates_channel:123', new Uint8Array([1, 2, 3, 4]))
         })
     })
 })
diff --git a/packages/core/src/storage/storage.ts b/packages/core/src/storage/storage.ts
index 427c02ac..ad6f96fb 100644
--- a/packages/core/src/storage/storage.ts
+++ b/packages/core/src/storage/storage.ts
@@ -62,7 +62,9 @@ export class StorageManager {
         this.driver.setup?.(this.log)
 
         if (this.options.cleanup ?? true) {
-            this._cleanupRestore = beforeExit(() => this._destroy().catch((err) => this.log.error(err)))
+            this._cleanupRestore = beforeExit(() => {
+                this._destroy().catch((err) => this.log.error('cleanup error: %s', err))
+            })
         }
 
         await this.driver.load?.()
diff --git a/packages/core/src/utils/function-utils.ts b/packages/core/src/utils/function-utils.ts
index 32a6a49d..9844ec5d 100644
--- a/packages/core/src/utils/function-utils.ts
+++ b/packages/core/src/utils/function-utils.ts
@@ -51,8 +51,9 @@ export function asyncResettable<T extends(...args: any[]) => Promise<any>>(func:
             return runningPromise
         }
 
+        // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
         runningPromise = func(...args)
-        runningPromise.then(() => {
+        void runningPromise.then(() => {
             runningPromise = null
             finished = true
         })
diff --git a/packages/core/src/utils/string-session.test.ts b/packages/core/src/utils/string-session.test.ts
index 767b9d6e..b2f7faca 100644
--- a/packages/core/src/utils/string-session.test.ts
+++ b/packages/core/src/utils/string-session.test.ts
@@ -125,7 +125,12 @@ describe('readStringSession', () => {
                 testMode: false,
                 primaryDcs: stubDcs,
                 authKey: stubAuthKey,
-                self: { userId: 12345, isBot: false },
+                self: {
+                    userId: 12345,
+                    isBot: false,
+                    isPremium: false,
+                    usernames: [],
+                },
             })
         })
 
@@ -140,7 +145,12 @@ describe('readStringSession', () => {
                 testMode: true,
                 primaryDcs: stubDcs,
                 authKey: stubAuthKey,
-                self: { userId: 12345, isBot: false },
+                self: {
+                    userId: 12345,
+                    isBot: false,
+                    isPremium: false,
+                    usernames: [],
+                },
             })
         })
     })
@@ -158,7 +168,12 @@ describe('readStringSession', () => {
                 // v1 didn't have separate media dc
                 primaryDcs: stubDcsSameMedia,
                 authKey: stubAuthKey,
-                self: { userId: 12345, isBot: false },
+                self: {
+                    userId: 12345,
+                    isBot: false,
+                    isPremium: false,
+                    usernames: [],
+                },
             })
         })
     })
diff --git a/packages/dispatcher/src/callback-data-builder.test.ts b/packages/dispatcher/src/callback-data-builder.test.ts
index a3e156f6..5275515e 100644
--- a/packages/dispatcher/src/callback-data-builder.test.ts
+++ b/packages/dispatcher/src/callback-data-builder.test.ts
@@ -1,7 +1,7 @@
 import { describe, expect, it } from 'vitest'
 
-import { CallbackQuery, MtArgumentError, PeersIndex } from '@mtcute/client'
-import { utf8EncodeToBuffer } from '@mtcute/client/utils.js'
+import { CallbackQuery, MtArgumentError, PeersIndex } from '@mtcute/core'
+import { utf8EncodeToBuffer } from '@mtcute/core/utils.js'
 import { createStub } from '@mtcute/test'
 
 import { CallbackDataBuilder } from './callback-data-builder.js'
diff --git a/packages/dispatcher/src/filters/bots.test.ts b/packages/dispatcher/src/filters/bots.test.ts
index 5c6e3b09..6982af5a 100644
--- a/packages/dispatcher/src/filters/bots.test.ts
+++ b/packages/dispatcher/src/filters/bots.test.ts
@@ -20,12 +20,12 @@ describe('filters.command', () => {
         const ctx = createMessageContext({
             message: text,
         })
-        // todo
-        // ctx.client.getAuthState = () => ({
-        //     isBot: true,
-        //     userId: 0,
-        //     selfUsername: 'testbot',
-        // })
+        void ctx.client.storage.self.store({
+            isBot: true,
+            isPremium: false,
+            userId: 0,
+            usernames: ['testbot'],
+        })
 
         // eslint-disable-next-line
         if (command(...params)(ctx)) return (ctx as any).command
@@ -39,11 +39,10 @@ describe('filters.command', () => {
         expect(getParsedCommand('/start', ['start', 'stop'])).toEqual(['start'])
     })
 
-    // todo
-    // it('should only parse commands to the current bot', () => {
-    //     expect(getParsedCommand('/start@testbot', 'start')).toEqual(['start'])
-    //     expect(getParsedCommand('/start@otherbot', 'start')).toEqual(null)
-    // })
+    it('should only parse commands to the current bot', () => {
+        expect(getParsedCommand('/start@testbot', 'start')).toEqual(['start'])
+        expect(getParsedCommand('/start@otherbot', 'start')).toEqual(null)
+    })
 
     it('should parse command arguments', () => {
         expect(getParsedCommand('/start foo bar baz', 'start')).toEqual(['start', 'foo', 'bar', 'baz'])
diff --git a/packages/dispatcher/src/state/service.ts b/packages/dispatcher/src/state/service.ts
index a49b5a61..da74b227 100644
--- a/packages/dispatcher/src/state/service.ts
+++ b/packages/dispatcher/src/state/service.ts
@@ -18,15 +18,14 @@ export class StateService {
     async load() {
         await this._load.run()
         this._vacuumTimer = setInterval(() => {
-            Promise.resolve(this.provider.state.vacuum(Date.now()))
-                .catch(() => {})
+            Promise.resolve(this.provider.state.vacuum(Date.now())).catch(() => {})
         }, 300_000)
     }
 
     async destroy() {
         await this.provider.driver.save?.()
         await this.provider.driver.destroy?.()
-        clearInterval(this._vacuumTimer!)
+        clearInterval(this._vacuumTimer)
         this._loaded = false
     }
 
diff --git a/packages/dispatcher/tests/dispatcher.test.ts b/packages/dispatcher/tests/dispatcher.test.ts
index 269cf6b0..5299b10e 100644
--- a/packages/dispatcher/tests/dispatcher.test.ts
+++ b/packages/dispatcher/tests/dispatcher.test.ts
@@ -1,6 +1,6 @@
 import { describe, expect, it } from 'vitest'
 
-import { PeersIndex, TelegramClient } from '@mtcute/client'
+import { PeersIndex, TelegramClient } from '@mtcute/core'
 
 import { Dispatcher, PropagationAction } from '../src/index.js'
 
diff --git a/packages/html-parser/src/html-parser.test.ts b/packages/html-parser/src/html-parser.test.ts
index 6d8e82d8..d159375b 100644
--- a/packages/html-parser/src/html-parser.test.ts
+++ b/packages/html-parser/src/html-parser.test.ts
@@ -1,7 +1,7 @@
 import Long from 'long'
 import { describe, expect, it } from 'vitest'
 
-import { MessageEntity, TextWithEntities, tl } from '@mtcute/client'
+import { MessageEntity, TextWithEntities, tl } from '@mtcute/core'
 
 // prettier has "html" special-cased which breaks the formatting
 // this is not an issue when using normally, since we properly handle newlines/spaces,
diff --git a/packages/i18n/tests/i18n.test.ts b/packages/i18n/tests/i18n.test.ts
index 97d99b01..35d98278 100644
--- a/packages/i18n/tests/i18n.test.ts
+++ b/packages/i18n/tests/i18n.test.ts
@@ -1,6 +1,6 @@
 import { describe, expect, it } from 'vitest'
 
-import { Message, PeersIndex } from '@mtcute/client'
+import { Message, PeersIndex } from '@mtcute/core'
 import { MessageContext } from '@mtcute/dispatcher'
 
 import { createMtcuteI18n, OtherLanguageWrap } from '../src/index.js'
diff --git a/packages/markdown-parser/src/markdown-parser.test.ts b/packages/markdown-parser/src/markdown-parser.test.ts
index b12f50b7..45a13c39 100644
--- a/packages/markdown-parser/src/markdown-parser.test.ts
+++ b/packages/markdown-parser/src/markdown-parser.test.ts
@@ -1,7 +1,7 @@
 import Long from 'long'
 import { describe, expect, it } from 'vitest'
 
-import { MessageEntity, TextWithEntities, tl } from '@mtcute/client'
+import { MessageEntity, TextWithEntities, tl } from '@mtcute/core'
 
 // md is special cased in prettier, we don't want that here
 import { md as md_ } from './index.js'
diff --git a/packages/sqlite/src/repository/peers.ts b/packages/sqlite/src/repository/peers.ts
index 0cfb65dc..cab6e23e 100644
--- a/packages/sqlite/src/repository/peers.ts
+++ b/packages/sqlite/src/repository/peers.ts
@@ -18,7 +18,7 @@ function mapPeerDto(dto: PeerDto): IPeersRepository.PeerInfo {
     return {
         id: dto.id,
         accessHash: dto.hash,
-        usernames: JSON.parse(dto.usernames),
+        usernames: JSON.parse(dto.usernames) as string[],
         updated: dto.updated,
         phone: dto.phone || undefined,
         complete: dto.complete,
@@ -47,7 +47,9 @@ export class SqlitePeersRepository implements IPeersRepository {
             )
 
             this._getById = db.prepare('select * from peers where id = ?')
-            this._getByUsername = db.prepare('select * from peers where exists (select 1 from json_each(usernames) where value = ?)')
+            this._getByUsername = db.prepare(
+                'select * from peers where exists (select 1 from json_each(usernames) where value = ?)',
+            )
             this._getByPhone = db.prepare('select * from peers where phone = ?')
 
             this._delAll = db.prepare('delete from peers')
diff --git a/packages/sqlite/test/sqlite.test.ts b/packages/sqlite/test/sqlite.test.ts
index bfa6c060..c3709f8e 100644
--- a/packages/sqlite/test/sqlite.test.ts
+++ b/packages/sqlite/test/sqlite.test.ts
@@ -1,10 +1,12 @@
 import { afterAll, beforeAll, describe } from 'vitest'
 
-import { testAuthKeysRepository } from '@mtcute/core/src/storage/repository/auth-keys.test-utils.js'
-import { testKeyValueRepository } from '@mtcute/core/src/storage/repository/key-value.test-utils.js'
-import { testPeersRepository } from '@mtcute/core/src/storage/repository/peers.test-utils.js'
-import { testRefMessagesRepository } from '@mtcute/core/src/storage/repository/ref-messages.test-utils.js'
 import { LogManager } from '@mtcute/core/utils.js'
+import {
+    testAuthKeysRepository,
+    testKeyValueRepository,
+    testPeersRepository,
+    testRefMessagesRepository,
+} from '@mtcute/test'
 
 import { SqliteStorage } from '../src/index.js'
 
@@ -12,9 +14,9 @@ if (import.meta.env.TEST_ENV === 'node') {
     describe('SqliteStorage', () => {
         const storage = new SqliteStorage(':memory:')
 
-        beforeAll(() => {
+        beforeAll(async () => {
             storage.driver.setup(new LogManager())
-            storage.driver.load()
+            await storage.driver.load()
         })
 
         testAuthKeysRepository(storage.authKeys)
diff --git a/packages/test/src/client.ts b/packages/test/src/client.ts
index 9ba350d0..a2913fa6 100644
--- a/packages/test/src/client.ts
+++ b/packages/test/src/client.ts
@@ -24,6 +24,7 @@ export class StubTelegramClient extends BaseTelegramClient {
             apiHash: '',
             logLevel: 0,
             storage,
+            disableUpdates: true,
             transport: () => {
                 const transport = new StubTelegramTransport({
                     onMessage: (data) => {
@@ -279,15 +280,8 @@ export class StubTelegramClient extends BaseTelegramClient {
 
     // helpers //
 
-    async connectAndWait() {
-        await this.connect()
-        await new Promise((resolve): void => {
-            this.mt.once('usable', resolve)
-        })
-    }
-
     async with(fn: () => MaybeAsync<void>): Promise<void> {
-        await this.connectAndWait()
+        await this.connect()
 
         let error: unknown
 
diff --git a/packages/test/src/index.ts b/packages/test/src/index.ts
index fbf0617c..e563c9ba 100644
--- a/packages/test/src/index.ts
+++ b/packages/test/src/index.ts
@@ -1,7 +1,7 @@
 export * from './client.js'
 export * from './crypto.js'
 export * from './storage.js'
-// export * from './storage-test.js' // todo
+export * from './storage/index.js'
 export * from './stub.js'
 export * from './transport.js'
 export * from './types.js'
diff --git a/packages/core/src/storage/repository/auth-keys.test-utils.ts b/packages/test/src/storage/auth-keys.ts
similarity index 98%
rename from packages/core/src/storage/repository/auth-keys.test-utils.ts
rename to packages/test/src/storage/auth-keys.ts
index 23a85a61..74c0510a 100644
--- a/packages/core/src/storage/repository/auth-keys.test-utils.ts
+++ b/packages/test/src/storage/auth-keys.ts
@@ -1,6 +1,6 @@
 import { afterEach, describe, expect, it, vi } from 'vitest'
 
-import { IAuthKeysRepository } from './auth-keys.js'
+import { IAuthKeysRepository } from '@mtcute/core'
 
 export function fakeAuthKeysRepository(): IAuthKeysRepository {
     return {
diff --git a/packages/test/src/storage/index.ts b/packages/test/src/storage/index.ts
new file mode 100644
index 00000000..03df2e41
--- /dev/null
+++ b/packages/test/src/storage/index.ts
@@ -0,0 +1,4 @@
+export * from './auth-keys.js'
+export * from './key-value.js'
+export * from './peers.js'
+export * from './ref-messages.js'
diff --git a/packages/core/src/storage/repository/key-value.test-utils.ts b/packages/test/src/storage/key-value.ts
similarity index 93%
rename from packages/core/src/storage/repository/key-value.test-utils.ts
rename to packages/test/src/storage/key-value.ts
index 13b66c01..e2537c50 100644
--- a/packages/core/src/storage/repository/key-value.test-utils.ts
+++ b/packages/test/src/storage/key-value.ts
@@ -1,7 +1,6 @@
 import { afterEach, describe, expect, it, vi } from 'vitest'
 
-import { IStorageDriver } from '../driver.js'
-import { IKeyValueRepository } from './key-value.js'
+import { IKeyValueRepository, IStorageDriver } from '@mtcute/core'
 
 export function fakeKeyValueRepository(): IKeyValueRepository {
     return {
diff --git a/packages/core/src/highlevel/storage/repository/peers.test-utils.ts b/packages/test/src/storage/peers.ts
similarity index 88%
rename from packages/core/src/highlevel/storage/repository/peers.test-utils.ts
rename to packages/test/src/storage/peers.ts
index 59f875e4..763c802b 100644
--- a/packages/core/src/highlevel/storage/repository/peers.test-utils.ts
+++ b/packages/test/src/storage/peers.ts
@@ -1,11 +1,10 @@
 import { describe, expect, it, vi } from 'vitest'
 
-import { createStub } from '@mtcute/test'
+import { IPeersRepository, IStorageDriver } from '@mtcute/core'
+import { TlBinaryWriter } from '@mtcute/core/utils.js'
 import { __tlWriterMap } from '@mtcute/tl/binary/writer.js'
-import { TlBinaryWriter } from '@mtcute/tl-runtime'
 
-import { IStorageDriver } from '../../../storage/driver.js'
-import { IPeersRepository } from './peers.js'
+import { createStub } from '../stub.js'
 
 export function fakePeersRepository(): IPeersRepository {
     return {
@@ -56,8 +55,8 @@ export function testPeersRepository(repo: IPeersRepository, driver: IStorageDriv
         })
 
         it('should store and retrieve peers', async () => {
-            repo.store(stubPeerUser)
-            repo.store(stubPeerChannel)
+            await repo.store(stubPeerUser)
+            await repo.store(stubPeerChannel)
             await driver.save?.()
 
             expect(fixPeerInfo(await repo.getById(123123))).toEqual(stubPeerUser)
@@ -69,11 +68,11 @@ export function testPeersRepository(repo: IPeersRepository, driver: IStorageDriv
         })
 
         it('should update peers usernames', async () => {
-            repo.store(stubPeerUser)
+            await repo.store(stubPeerUser)
             await driver.save?.()
 
             const modUser = { ...stubPeerUser, usernames: ['some_user2'] }
-            repo.store(modUser)
+            await repo.store(modUser)
             await driver.save?.()
 
             expect(fixPeerInfo(await repo.getById(123123))).toEqual(modUser)
diff --git a/packages/core/src/highlevel/storage/repository/ref-messages.test-utils.ts b/packages/test/src/storage/ref-messages.ts
similarity index 86%
rename from packages/core/src/highlevel/storage/repository/ref-messages.test-utils.ts
rename to packages/test/src/storage/ref-messages.ts
index b8ffc5de..785690f2 100644
--- a/packages/core/src/highlevel/storage/repository/ref-messages.test-utils.ts
+++ b/packages/test/src/storage/ref-messages.ts
@@ -1,7 +1,6 @@
 import { afterEach, describe, expect, it, vi } from 'vitest'
 
-import { IStorageDriver } from '../../../storage/driver.js'
-import { IReferenceMessagesRepository } from './ref-messages.js'
+import { IReferenceMessagesRepository, IStorageDriver } from '@mtcute/core'
 
 export function fakeRefMessagesRepository(): IReferenceMessagesRepository {
     return {
@@ -27,7 +26,10 @@ export function testRefMessagesRepository(repo: IReferenceMessagesRepository, dr
             await repo.store(2, 6, 7)
             await driver.save?.()
 
-            expect(await repo.getByPeer(1)).deep.oneOf([[2, 3], [4, 5]])
+            expect(await repo.getByPeer(1)).deep.oneOf([
+                [2, 3],
+                [4, 5],
+            ])
             expect(await repo.getByPeer(2)).toEqual([6, 7])
             expect(await repo.getByPeer(3)).toEqual(null)
             expect(await repo.getByPeer(4)).toEqual(null)
@@ -64,7 +66,11 @@ export function testRefMessagesRepository(repo: IReferenceMessagesRepository, dr
             await repo.deleteByPeer(1)
             await driver.save?.()
             expect(await repo.getByPeer(1)).toEqual(null)
-            expect(await repo.getByPeer(2)).deep.oneOf([[20, 30], [40, 50], [60, 70]])
+            expect(await repo.getByPeer(2)).deep.oneOf([
+                [20, 30],
+                [40, 50],
+                [60, 70],
+            ])
         })
     })
 }
diff --git a/packages/test/src/transport.ts b/packages/test/src/transport.ts
index 47aecfdf..562469d4 100644
--- a/packages/test/src/transport.ts
+++ b/packages/test/src/transport.ts
@@ -1,8 +1,8 @@
 import EventEmitter from 'events'
 
-import { tl } from '@mtcute/tl'
 import { ITelegramTransport, TransportState } from '@mtcute/core'
 import { ICryptoProvider, Logger } from '@mtcute/core/utils.js'
+import { tl } from '@mtcute/tl'
 
 export class StubTelegramTransport extends EventEmitter implements ITelegramTransport {
     constructor(
diff --git a/packages/tl/scripts/fetch-api.ts b/packages/tl/scripts/fetch-api.ts
index 295215a3..0a0b85a9 100644
--- a/packages/tl/scripts/fetch-api.ts
+++ b/packages/tl/scripts/fetch-api.ts
@@ -9,6 +9,7 @@ import { readFile, writeFile } from 'fs/promises'
 import { join } from 'path'
 import * as readline from 'readline'
 
+import { hasPresentKey, isPresent } from '@mtcute/core/utils.js'
 import {
     generateTlSchemasDifference,
     mergeTlEntries,
@@ -19,7 +20,6 @@ import {
     TlFullSchema,
     writeTlEntryToString,
 } from '@mtcute/tl-utils'
-import { hasPresentKey, isPresent } from '@mtcute/core/utils.js'
 
 import {
     __dirname,