diff --git a/api/.eslintrc b/api/.eslintrc
index 24ec14d55c..97e1aa8b3a 100644
--- a/api/.eslintrc
+++ b/api/.eslintrc
@@ -1,22 +1,44 @@
 {
+  "root": true,
   "env": {
     "browser": true,
     "es2021": true,
     "node": true
   },
-  "extends": ["eslint:recommended", "plugin:@typescript-eslint/recommended"],
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended"
+  ],
   "parser": "@typescript-eslint/parser",
   "parserOptions": {
     "ecmaVersion": "latest",
     "sourceType": "module"
   },
-  "plugins": ["@typescript-eslint"],
+  "plugins": [
+    "@typescript-eslint"
+  ],
   "rules": {
-    "indent": ["warn", 2, { "SwitchCase": 1, "flatTernaryExpressions": false }],
-    "linebreak-style": ["error", "unix"],
-    "quotes": ["warn", "single"],
-    "semi": ["error", "always"],
+    "indent": [
+      "warn",
+      2,
+      {
+        "SwitchCase": 1,
+        "flatTernaryExpressions": false
+      }
+    ],
+    "linebreak-style": [
+      "error",
+      "unix"
+    ],
+    "quotes": [
+      "warn",
+      "single"
+    ],
+    "semi": [
+      "error",
+      "always"
+    ],
     "@typescript-eslint/no-empty-function": 0,
     "no-case-declarations": 0
   }
-}
+}
\ No newline at end of file
diff --git a/api/CHANGELOG.md b/api/CHANGELOG.md
index b8581bda9d..2662ff6e03 100644
--- a/api/CHANGELOG.md
+++ b/api/CHANGELOG.md
@@ -1,3 +1,14 @@
+## 0.23.5
+
+_07/18/2022_
+
+https://github.com/gear-tech/gear-js/pull/843
+
+### Changes
+
+- Fix getting program pages according to https://github.com/gear-tech/gear/pull/1193
+
+---
 ## 0.23.4
 
 _07/18/2022_
diff --git a/api/package-lock.json b/api/package-lock.json
index 6cdc990232..94dd1cd196 100644
--- a/api/package-lock.json
+++ b/api/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@gear-js/api",
-  "version": "0.23.4",
+  "version": "0.23.5",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@gear-js/api",
-      "version": "0.23.4",
+      "version": "0.23.5",
       "license": "GPL-3.0",
       "dependencies": {
         "@polkadot/api": "^8.11.3",
diff --git a/api/package.json b/api/package.json
index 3d4b52acf5..84b14777ad 100644
--- a/api/package.json
+++ b/api/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@gear-js/api",
-  "version": "0.23.4",
+  "version": "0.23.5",
   "description": "A JavaScript library that provides functionality to connect GEAR Component APIs.",
   "main": "cjs/index.js",
   "module": "index.js",
diff --git a/api/src/Code.ts b/api/src/Code.ts
index 17ce2a693c..3099fd2101 100644
--- a/api/src/Code.ts
+++ b/api/src/Code.ts
@@ -4,7 +4,7 @@ import { Bytes, Option } from '@polkadot/types';
 
 import { GearTransaction } from './Transaction';
 import { generateCodeHash, validateCodeId } from './utils';
-import { CodeMetadata, Hex } from './types';
+import { CodeMetadata, CodeStorage, Hex } from './types';
 export class GearCode extends GearTransaction {
   /**
    * Submit code without initialization
@@ -20,8 +20,33 @@ export class GearCode extends GearTransaction {
     return { codeHash, submitted: this.submitted };
   }
 
+  /**
+   * Check that codeId exists on chain
+   * @param codeId 
+   * @returns 
+   */
   async exists(codeId: string) {
     const codeMetadata = await this.api.query.gearProgram.metadataStorage(codeId) as Option<CodeMetadata>;
     return codeMetadata.isSome;
   }
+
+
+  /**
+   * Get code storage
+   * @param codeId 
+   * @returns 
+   */
+  async storage(codeId: Hex): Promise<CodeStorage> {
+    return this.api.query.gearProgram.codeStorage(codeId) as unknown as CodeStorage;
+  }
+
+  /**
+   * Get static pages of code
+   * @param codeId 
+   * @returns 
+   */
+  async staticPages(codeId: Hex): Promise<number | null> {
+    const storage = await this.storage(codeId);
+    return storage.isSome ? storage.unwrap().staticPages.toNumber() : null;
+  }
 }
diff --git a/api/src/Program.ts b/api/src/Program.ts
index abfc573097..1003bef2f2 100644
--- a/api/src/Program.ts
+++ b/api/src/Program.ts
@@ -1,6 +1,7 @@
 import { AnyJson, ISubmittableResult } from '@polkadot/types/types';
 import { SubmittableExtrinsic } from '@polkadot/api/types';
 import { randomAsHex } from '@polkadot/util-crypto';
+import { u8aToHex } from '@polkadot/util';
 import { Bytes } from '@polkadot/types';
 
 import { createPayload, generateProgramId, GPROG, GPROG_HEX, validateGasLimit, validateValue } from './utils';
@@ -85,4 +86,16 @@ export class GearProgram extends GearTransaction {
     const program = progs.find((prog) => prog.eq(`0x${GPROG_HEX}${id.slice(2)}`));
     return Boolean(program);
   }
+
+
+
+  /**
+   * Get codeHash of program on-chain
+   * @param programId
+   * @returns codeHash in hex format
+   */
+  async codeHash(programId: Hex): Promise<Hex> {
+    const program = await this.api.storage.gProg(programId);
+    return u8aToHex(program.code_hash);
+  }
 }
diff --git a/api/src/State.ts b/api/src/State.ts
index 3e40b219b4..e59d3b4676 100644
--- a/api/src/State.ts
+++ b/api/src/State.ts
@@ -39,13 +39,18 @@ export class GearProgramState extends GearStorage {
    * @returns decoded state
    */
   async read(programId: Hex, metaWasm: Buffer, inputValue?: AnyJson): Promise<Codec> {
+    const codeHash = await this.api.program.codeHash(programId);
+    let initialSize = await this.api.code.staticPages(codeHash);
+
     const program = await this.gProg(programId);
-    if (!program) {
-      throw new ReadStateError('Program is terminated');
-    }
+
+    program.allocations.forEach((value) => {
+      if (value.gtn(initialSize - 1)) {
+        initialSize = value.toNumber();
+      }
+    });
 
     const pages = await this.gPages(programId, program);
-    const initialSize = program.allocations.size;
     const block = await this.api.blocks.getFinalizedHead();
     const blockTimestamp = await this.api.blocks.getBlockTimestamp(block.toHex());
 
diff --git a/api/src/Storage.ts b/api/src/Storage.ts
index c5f6cb910f..0fe3b45e62 100644
--- a/api/src/Storage.ts
+++ b/api/src/Storage.ts
@@ -1,11 +1,10 @@
 import { Option, Raw } from '@polkadot/types';
 import { Codec } from '@polkadot/types/types';
-import { u8aToHex } from '@polkadot/util';
 
-import { IActiveProgram, IGearPages, IProgram, Hex } from './types';
+import { ActiveProgram, IGearPages, IProgram, Hex } from './types';
 import { GPAGES_HEX, GPROG_HEX, SEPARATOR } from './utils';
 import { CreateType } from './create-type';
-import { ReadStateError } from './errors';
+import { ProgramTerminatedError, ReadStateError } from './errors';
 import { GearApi } from './GearApi';
 
 export class GearStorage {
@@ -21,13 +20,16 @@ export class GearStorage {
    * @param programId
    * @returns
    */
-  async gProg(programId: Hex): Promise<IActiveProgram> {
+  async gProg(programId: Hex): Promise<ActiveProgram> {
     const storage = (await this.api.rpc.state.getStorage(`0x${GPROG_HEX}${programId.slice(2)}`)) as Option<Raw>;
     if (storage.isNone) {
       throw new ReadStateError(`Program with id ${programId} was not found in the storage`);
     }
     const program = this.api.createType('Program', storage.unwrap()) as IProgram;
-    return program.isActive ? program.asActive : program.asTerminated;
+
+    if (program.isTerminated) throw new ProgramTerminatedError();
+
+    return program.asActive;
   }
 
   /**
@@ -36,7 +38,7 @@ export class GearStorage {
    * @param gProg
    * @returns
    */
-  async gPages(programId: Hex, gProg: IActiveProgram): Promise<IGearPages> {
+  async gPages(programId: Hex, gProg: ActiveProgram): Promise<IGearPages> {
     const keys = {};
     gProg.pages_with_data.forEach((value) => {
       keys[value.toNumber()] = `0x${GPAGES_HEX}${programId.slice(2)}${SEPARATOR}${this.api
@@ -51,14 +53,4 @@ export class GearStorage {
     }
     return pages;
   }
-
-  /**
-   * Get codeHash of program on-chain
-   * @param programId
-   * @returns codeHash in hex format
-   */
-  async getCodeHash(programId: Hex): Promise<Hex> {
-    const program = await this.gProg(programId);
-    return u8aToHex(program.code_hash);
-  }
 }
diff --git a/api/src/errors/program.errors.ts b/api/src/errors/program.errors.ts
index 71d2a95f32..db0a607399 100644
--- a/api/src/errors/program.errors.ts
+++ b/api/src/errors/program.errors.ts
@@ -6,6 +6,14 @@ export class SubmitProgramError extends Error {
   }
 }
 
+export class ProgramDoesNotExistError extends Error {
+  name = 'ProgramDoesNotExist';
+
+  constructor() {
+    super('Program does not exist');
+  }
+}
+
 export class GetGasSpentError extends Error {
   name = 'GetGasSpentError';
 
@@ -13,3 +21,11 @@ export class GetGasSpentError extends Error {
     super(`Unable to get gasSpent. ${message}` || 'Unable to get gasSpent. Params are invalid');
   }
 }
+
+export class ProgramTerminatedError extends Error {
+  name = 'ProgramTerminated';
+
+  constructor() {
+    super('Program terminated');
+  }
+}
\ No newline at end of file
diff --git a/api/src/types/interfaces/message/entry.ts b/api/src/types/interfaces/message/entry.ts
index a138cc71db..0c11040ab7 100644
--- a/api/src/types/interfaces/message/entry.ts
+++ b/api/src/types/interfaces/message/entry.ts
@@ -9,3 +9,5 @@ export interface Entry extends Enum {
   asHandle: Null;
   asReply: MessageId;
 }
+
+export type DispatchKind = Entry
\ No newline at end of file
diff --git a/api/src/types/interfaces/program/base.ts b/api/src/types/interfaces/program/base.ts
index 53ce9b596e..84bb4adede 100644
--- a/api/src/types/interfaces/program/base.ts
+++ b/api/src/types/interfaces/program/base.ts
@@ -1,16 +1,17 @@
 import { Enum, u32, u64, Map, BTreeSet } from '@polkadot/types';
 
 import { MessageId } from '../ids';
+import { WasmPageNumber } from './pages';
 
 export interface IProgram extends Enum {
   isActive: boolean;
-  asActive: IActiveProgram;
+  asActive: ActiveProgram;
   isTerminated: boolean;
   asTerminated: null;
 }
 
-export interface IActiveProgram extends Map {
-  allocations: BTreeSet<u32>;
+export interface ActiveProgram extends Map {
+  allocations: BTreeSet<WasmPageNumber>;
   pages_with_data: BTreeSet<u32>;
   code_hash: Uint8Array;
   nonce: u64;
diff --git a/api/src/types/interfaces/program/code.ts b/api/src/types/interfaces/program/code.ts
index f00e53a8b2..d8ef55bdbc 100644
--- a/api/src/types/interfaces/program/code.ts
+++ b/api/src/types/interfaces/program/code.ts
@@ -1,8 +1,19 @@
 import { Codec } from '@polkadot/types-codec/types';
-import { H256 } from '@polkadot/types/interfaces';
-import { u32 } from '@polkadot/types';
+import { H256, } from '@polkadot/types/interfaces';
+import { u8, u32, Option, BTreeSet, Vec } from '@polkadot/types';
+import { WasmPageNumber } from './pages';
+import { DispatchKind } from '../message';
 
 export interface CodeMetadata extends Codec {
   author: H256,
   blockNumber: u32
-}
\ No newline at end of file
+}
+
+export interface InstrumentedCode extends Codec {
+  code: Vec<u8>,
+  exports: BTreeSet<DispatchKind>,
+  staticPages: WasmPageNumber,
+  version: u32
+}
+
+export type CodeStorage = Option<InstrumentedCode>;
\ No newline at end of file
diff --git a/api/src/types/interfaces/program/pages.ts b/api/src/types/interfaces/program/pages.ts
index 879dbf39c2..da8babd9c4 100644
--- a/api/src/types/interfaces/program/pages.ts
+++ b/api/src/types/interfaces/program/pages.ts
@@ -1,3 +1,7 @@
+import { u32 } from '@polkadot/types';
+
 export interface IGearPages {
   [key: string]: Uint8Array;
 }
+
+export type WasmPageNumber = u32;
\ No newline at end of file
diff --git a/api/test/State.test.ts b/api/test/State.test.ts
index bf5c0a0119..f23be01d42 100644
--- a/api/test/State.test.ts
+++ b/api/test/State.test.ts
@@ -12,6 +12,7 @@ const demo_meta_test = {
   meta: readFileSync(join(GEAR_EXAMPLES_WASM_DIR, 'demo_meta.meta.wasm')),
   id: '0x' as Hex,
   uploadBlock: '0x',
+  codeHash: '0x' as Hex,
 };
 const timestamp_test = {
   code: readFileSync(join(TEST_WASM_DIR, 'timestamp.opt.wasm')),
@@ -28,7 +29,7 @@ beforeAll(async () => {
     gasLimit: 2_000_000_000,
   }).programId;
   let initStatus = checkInit(api, timestamp_test.id);
-  api.program.signAndSend(alice, () => {});
+  api.program.signAndSend(alice, () => { });
   expect(await initStatus()).toBe('success');
 
   demo_meta_test.id = api.program.submit(
@@ -69,6 +70,22 @@ describe('Read State', () => {
     expect(gPages).toBeDefined();
   });
 
+  test('Get codeHash', async () => {
+    demo_meta_test.codeHash = await api.program.codeHash(demo_meta_test.id);
+    expect(demo_meta_test.codeHash).toBeDefined();
+    expect(demo_meta_test.codeHash.startsWith('0x')).toBeTruthy();
+  });
+
+  test('Get code storage', async () => {
+    const codeStorage = await api.code.storage(demo_meta_test.codeHash);
+    expect(codeStorage.isSome).toBeTruthy();
+    const unwrappedCodeStorage = codeStorage.unwrap().toHuman();
+    expect(unwrappedCodeStorage).toHaveProperty('code');
+    expect(unwrappedCodeStorage).toHaveProperty('exports');
+    expect(unwrappedCodeStorage).toHaveProperty('staticPages');
+    expect(unwrappedCodeStorage).toHaveProperty('version');
+  });
+
   test('Get nonexistent program from storage', async () => {
     await expect(
       api.storage.gProg('0x0000000000000000000000000000000000000000000000000000000000000000'),
diff --git a/package.json b/package.json
index 59fe524db2..a729636bba 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,8 @@
     "website/common"
   ],
   "lint-staged": {
-    "*.{js,css,ts,tsx,scss}": "eslint --fix"
+    "*.{js,css,ts,tsx,scss}": "eslint --fix",
+    "./api/*.{js,ts}": "cd api && npm run lint:fix"
   },
   "resolutions": {
     "@types/react": "17.0.44"