diff --git a/.eslintrc b/.eslintrc
index 90ed444e..a5b50eb5 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -1,6 +1,6 @@
 {
   "root": true,
-  "parser": "babel-eslint",
+  "parser": "@typescript-eslint/parser",
   "parserOptions": {
     "ecmaVersion": 2018,
     "sourceType": "module",
@@ -15,13 +15,8 @@
     "browser": true,
     "jest": true
   },
-  "plugins": [
-    "babel",
-    "import"
-  ],
-  "extends": [
-    "eslint-config-airbnb-base"
-  ],
+  "plugins": ["babel", "import"],
+  "extends": ["eslint-config-airbnb-base"],
   "globals": {},
   "rules": {
     "no-console": ["warn"],
@@ -34,7 +29,7 @@
     "no-underscore-dangle": "off",
     "no-bitwise": "off",
     "no-mixed-operators": "off",
-    "max-len": ["error", { "code": 120}],
+    "max-len": ["error", { "code": 120 }],
     "class-methods-use-this": "off",
     "no-plusplus": "off"
   }
diff --git a/package.json b/package.json
index d716be6a..a6593093 100644
--- a/package.json
+++ b/package.json
@@ -1,5 +1,5 @@
 {
-  "name": "aelf-sdk",
+  "name": "aelf-web3",
   "version": "3.2.41",
   "description": "aelf-sdk js library",
   "main": "dist/aelf.cjs.js",
@@ -24,7 +24,7 @@
     "test:node:watch": "jest --config=jest.node.config.js --watch"
   },
   "keywords": [
-    "aelf-sdk"
+    "aelf-web3"
   ],
   "files": [
     "src",
@@ -41,10 +41,12 @@
   "engines": {
     "node": ">=10.5.0"
   },
+  "types": "types",
   "engineStrict": true,
   "dependencies": {
     "@aelfqueen/protobufjs": "^6.8.9",
     "@babel/runtime": "^7.4.5",
+    "@typescript-eslint/parser": "^5.47.1",
     "assert": "^2.0.0",
     "bignumber.js": "^9.0.0",
     "bip39": "^3.0.2",
@@ -65,6 +67,8 @@
     "@babel/plugin-proposal-class-properties": "^7.4.4",
     "@babel/plugin-transform-runtime": "^7.4.4",
     "@babel/preset-env": "^7.4.5",
+    "@types/elliptic": "^6.4.14",
+    "@types/hdkey": "^2.0.1",
     "babel-eslint": "^10.0.2",
     "babel-loader": "^8.0.6",
     "bundle-analyzer": "^0.0.6",
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 00000000..f5748540
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,26 @@
+{
+  "ts-node": {
+    "compilerOptions": {
+      "module": "commonjs"
+    }
+  },
+  "compilerOptions": {
+    "module": "esnext",
+    "lib": ["dom", "dom.iterable", "esnext"],
+    "target": "es5",
+    "moduleResolution": "node",
+    "noImplicitAny": true,
+    "noImplicitThis": true,
+    "strictNullChecks": true,
+    "strictFunctionTypes": true,
+    "noEmit": true,
+    "allowJs": false,
+    "allowSyntheticDefaultImports": false,
+    "baseUrl": ".",
+    "paths": {
+      "aelf-web3": ["types"]
+    },
+    "esModuleInterop": true,
+    "declaration": true
+  }
+}
diff --git a/types/chain/chainMethod.d.ts b/types/chain/chainMethod.d.ts
new file mode 100644
index 00000000..d85d1528
--- /dev/null
+++ b/types/chain/chainMethod.d.ts
@@ -0,0 +1,43 @@
+import * as protobuf from "@aelfqueen/protobufjs/light";
+import { RequestManager } from "types/util/requestManage";
+type TInputAddressFormatter = (address: any) => string;
+interface IChainMethodParams {
+  name: string;
+  call: string;
+  method?: string;
+  params?: Array<string | undefined>;
+  inputFormatter?: Array<TInputAddressFormatter | undefined>;
+  outputFormatter?: protobuf.Type | null;
+}
+export type TExtractArg = Function & {
+  isSync: boolean;
+  callback?: Function;
+  [k: string]: any;
+};
+export interface IExtractArgumentsIntoObjectResult {
+  method: Function;
+  requestMethod: string;
+  isSync: boolean;
+  callback: Function;
+  params: { [k in string]: any };
+}
+declare class ChainMethod {
+  constructor({
+    name,
+    call,
+    method,
+    params,
+    inputFormatter,
+    outputFormatter,
+  }: IChainMethodParams);
+  public formatInput(args: Array<any>): Array<any>;
+  public setRequestManager(manager: RequestManager): void;
+  public formatOutput(result: any): any;
+  public extractArgumentsIntoObject(
+    args: TExtractArg[]
+  ): IExtractArgumentsIntoObjectResult;
+  public run(
+    args: TExtractArg[]
+  ): { [k: string]: any } | Promise<{ [k: string]: any }>;
+}
+export default ChainMethod;
diff --git a/types/chain/index.d.ts b/types/chain/index.d.ts
new file mode 100644
index 00000000..6e139663
--- /dev/null
+++ b/types/chain/index.d.ts
@@ -0,0 +1,22 @@
+import { Contract } from "types/contract";
+import { RequestManager } from "types/util/requestManage";
+import { IWallet } from "types/wallet";
+import { IExtractArgumentsIntoObjectResult, TExtractArg } from "./chainMethod";
+
+declare class Chain {
+  constructor(requestManager: RequestManager);
+  public extractArgumentsIntoObject(
+    args: TExtractArg[]
+  ): IExtractArgumentsIntoObjectResult;
+  public contractAt(
+    address: string,
+    wallet: IWallet,
+    args: { [k in string]: any }
+  ): Promise<Contract>;
+  public getMerklePath(
+    txId: string,
+    height: number,
+    args: { [k in string]: any }
+  ): any[] | null;
+}
+export default Chain;
diff --git a/types/contract/contractMethod.d.ts b/types/contract/contractMethod.d.ts
new file mode 100644
index 00000000..974f61f9
--- /dev/null
+++ b/types/contract/contractMethod.d.ts
@@ -0,0 +1,76 @@
+import Chain from "types/chain";
+import { IWallet } from "types/wallet";
+import * as protobuf from "@aelfqueen/protobufjs";
+import { ITransaction } from "types/util/proto";
+import { Contract } from ".";
+type TRawTx = ITransaction & {
+  refBlockNumber: string;
+  refBlockPrefix: string;
+};
+
+interface IExtractArgumentsIntoObject {
+  callback: Function;
+  isSync: boolean;
+}
+interface IRequestRes {
+  method: string;
+  callback: Function;
+  params: string;
+  format?: { [k: string]: any } | null;
+}
+declare class ContractMethod {
+  constructor(
+    chain: Chain,
+    method: protobuf.Method,
+    contractAddress: string,
+    walletInstance: IWallet
+  );
+  public packInput(input: { [k: string]: any }): Uint8Array;
+  public unpackPackedInput(
+    inputPacked?: ArrayBuffer | SharedArrayBuffer | null
+  ): { [k: string]: any } | undefined | null;
+  public unpackOutput(
+    output?: ArrayBuffer | SharedArrayBuffer | null
+  ): { [k: string]: any } | undefined | null;
+  public packOutput(result?: { [k: string]: any } | null): Uint8Array;
+  public handleTransaction(
+    height: string,
+    hash: string,
+    encoded: Uint8Array
+  ): string;
+  public prepareParametersAsync(args: Array<any>): Promise<string>;
+  public prepareParameters(args: Array<any>): string;
+  public prepareParametersWithBlockInfo(args: Array<any>): string;
+  // TODO
+  public sendTransaction(
+    ...args: Array<{ [k: string]: any }>
+  ): { TransactionId: string } | Promise<{ TransactionId: string }>;
+  public callReadOnly(
+    ...args: Array<{ [k: string]: any }>
+  ):
+    | { [k: string]: any }
+    | undefined
+    | null
+    | Promise<{ [k: string]: any } | undefined | null>;
+  public extractArgumentsIntoObject(
+    ...args: Array<{ [k: string]: any }>
+  ): IExtractArgumentsIntoObject;
+
+  public getSignedTx(...args: Array<{ [k: string]: any }>): string | undefined;
+  public getRawTx(
+    blockHeightInput: string,
+    blockHashInput: string,
+    packedInput: Uint8Array
+  ): TRawTx;
+  public request(...args: Array<any>): IRequestRes;
+  public run(
+    ...args: Array<{ [k: string]: any }>
+  ): { TransactionId: string } | Promise<{ TransactionId: string }>;
+  public bindMethodToContract(contract: Contract): void;
+  public getRawTx(
+    blockHeightInput: string,
+    blockHashInput: string,
+    packedInput: Uint8Array
+  ): TRawTx;
+}
+export default ContractMethod;
diff --git a/types/contract/index.d.ts b/types/contract/index.d.ts
new file mode 100644
index 00000000..984b3a10
--- /dev/null
+++ b/types/contract/index.d.ts
@@ -0,0 +1,22 @@
+import Chain from "types/chain";
+import { IFileDescriptorSet } from "@aelfqueen/protobufjs/ext/descriptor";
+import * as protobuf from "@aelfqueen/protobufjs/light";
+import { IWallet } from "types/wallet";
+export class Contract {
+  constructor(chain: Chain, services: Array<protobuf.Service>, address: string);
+}
+declare class ContractFactory {
+  constructor(
+    chain: Chain,
+    fileDescriptorSet: IFileDescriptorSet,
+    wallet: IWallet
+  );
+  public static bindMethodsToContract(
+    contract: Contract,
+    wallet: IWallet
+  ): void;
+
+  public at(address: string, callback: Function): Contract;
+}
+
+export default ContractFactory;
diff --git a/types/index.d.ts b/types/index.d.ts
new file mode 100644
index 00000000..d96d4c13
--- /dev/null
+++ b/types/index.d.ts
@@ -0,0 +1,101 @@
+import * as protobuf from "@aelfqueen/protobufjs/light";
+import HttpProvider from "./util/httpProvider";
+import Wallet from "./wallet/index";
+import * as proto from "./util/proto";
+import * as utils from "./util/utils";
+import { sha256 } from "js-sha256";
+import * as transform from "./util/transform";
+import {
+  arrayToHex,
+  padLeft,
+  padRight,
+  decodeAddressRep,
+  encodeAddressRep,
+  isBigNumber,
+  isString,
+  isFunction,
+  isObject,
+  isBoolean,
+  isJson,
+  toBigNumber,
+  getValueOfUnit,
+  fromWei,
+  toWei,
+  toTwosComplement,
+  uint8ArrayToHex,
+  noop,
+  setPath,
+  unpackSpecifiedTypeData,
+  deserializeTransaction,
+  getAuthorization,
+} from "./util/utils";
+import {
+  isInBloom,
+  isEventInBloom,
+  isIndexedInBloom,
+  isAddressInBloom,
+} from "./util/bloom";
+interface IUtils {
+  base58: utils.base58;
+  chainIdConvertor: utils.chainIdConvertor;
+  arrayToHex: typeof arrayToHex;
+  padLeft: typeof padLeft;
+  padRight: typeof padRight;
+  decodeAddressRep: typeof decodeAddressRep;
+  encodeAddressRep: typeof encodeAddressRep;
+  isBigNumber: typeof isBigNumber;
+  isString: typeof isString;
+  isFunction: typeof isFunction;
+  isObject: typeof isObject;
+  isBoolean: typeof isBoolean;
+  isJson: typeof isJson;
+  toBigNumber: typeof toBigNumber;
+  getValueOfUnit: typeof getValueOfUnit;
+  fromWei: typeof fromWei;
+  toWei: typeof toWei;
+  toTwosComplement: typeof toTwosComplement;
+  uint8ArrayToHex: typeof uint8ArrayToHex;
+  noop: typeof noop;
+  setPath: typeof setPath;
+  unpackSpecifiedTypeData: typeof unpackSpecifiedTypeData;
+  deserializeTransaction: typeof deserializeTransaction;
+  getAuthorization: typeof getAuthorization;
+}
+import Settings from "./util/settings";
+interface IBloom {
+  isInBloom: typeof isInBloom;
+  isEventInBloom: typeof isEventInBloom;
+  isIndexedInBloom: typeof isIndexedInBloom;
+  isAddressInBloom: typeof isAddressInBloom;
+}
+type TUtil = IUtils &
+  IBloom & {
+    sha256: typeof sha256;
+  } & {
+    transform: typeof transform;
+  };
+interface IVersion {
+  api?: string;
+}
+declare namespace AElf {}
+export declare class AElf {
+  constructor(provider: HttpProvider);
+  static version?: string;
+  static providers: {
+    HttpProvider: HttpProvider;
+  };
+  static pbjs: typeof protobuf;
+  static pbUtils: typeof proto;
+  static wallet: Wallet;
+  static utils: TUtil;
+  providers: {
+    HttpProvider: HttpProvider;
+  };
+  settings: Settings;
+  version: IVersion;
+  isConnected(): boolean;
+  // TODO:
+  // reset 方法不存在
+  setProvider(provider: HttpProvider): void;
+}
+export default AElf;
diff --git a/types/util/bloom.d.ts b/types/util/bloom.d.ts
new file mode 100644
index 00000000..b0a58bc9
--- /dev/null
+++ b/types/util/bloom.d.ts
@@ -0,0 +1,13 @@
+export declare function isInBloom(bloom: string, hash: string): boolean;
+export declare function isEventInBloom(
+  bloom: string,
+  eventName: string
+): boolean;
+export declare function isIndexedInBloom(
+  bloom: string,
+  indexed: string
+): boolean;
+export declare function isAddressInBloom(
+  bloom: string,
+  address: string
+): boolean;
diff --git a/types/util/errors.d.ts b/types/util/errors.d.ts
new file mode 100644
index 00000000..6001d1ce
--- /dev/null
+++ b/types/util/errors.d.ts
@@ -0,0 +1,9 @@
+interface IRequestError {
+  InvalidNumberOfRPCParams(): Error;
+  InvalidConnection(host: string): Error;
+  InvalidProvider(): Error;
+  InvalidResponse(error: Error, result: { [k: string]: any }): Error;
+  ConnectionTimeout(ms: string | number): Error;
+}
+declare const RequestError: IRequestError;
+export { RequestError };
diff --git a/types/util/formatters.d.ts b/types/util/formatters.d.ts
new file mode 100644
index 00000000..209931fb
--- /dev/null
+++ b/types/util/formatters.d.ts
@@ -0,0 +1,3 @@
+import { Message } from "@aelfqueen/protobufjs";
+export function inputAddressFormatter(address: string): string;
+export function outputFileDescriptorSetFormatter(result: string): Message<{}>;
diff --git a/types/util/hash.d.ts b/types/util/hash.d.ts
new file mode 100644
index 00000000..c8906f24
--- /dev/null
+++ b/types/util/hash.d.ts
@@ -0,0 +1,4 @@
+export declare function keccak256(bits: Buffer): string;
+export declare function keccak512(bits: Buffer): string;
+export declare function keccak256s(bits: Buffer): string;
+export declare function keccak512s(bits: Buffer): string;
diff --git a/types/util/httpProvider.d.ts b/types/util/httpProvider.d.ts
new file mode 100644
index 00000000..713fed36
--- /dev/null
+++ b/types/util/httpProvider.d.ts
@@ -0,0 +1,43 @@
+interface ITimeoutResolve {
+  type: string;
+}
+type TRequestConfig = {
+  url: RequestInfo | URL;
+} & RequestInit;
+interface IError {
+  message: string;
+}
+interface IFormatResponseTextRes {
+  status: number;
+  error: number;
+  Error: IError;
+  statusText: string;
+}
+declare class HttpProvider {
+  constructor(host?: string, timeout?: number, headers?: Headers);
+  public static formatResponse(response: Response): { [k: string]: any };
+  public static formatResponseText(request: Request): IFormatResponseTextRes;
+  public static timeoutPromise(delay: number): Promise<ITimeoutResolve>;
+  public requestSendByFetch(
+    requestConfig: TRequestConfig,
+    request: Request
+  ): Request;
+  public sendAsyncByFetch(
+    requestConfig: TRequestConfig
+  ): Promise<{ [k: string]: any }>;
+  public requestSend(
+    requestConfig: TRequestConfig,
+    request: Request,
+    isAsync?: boolean
+  ): void;
+  public send(requestConfig: TRequestConfig): { [k: string]: any };
+  public sendAsync(
+    requestConfig: TRequestConfig
+  ): Promise<{ [k: string]: any }>;
+  public sendAsyncByXMLHttp(
+    requestConfig: TRequestConfig
+  ): Promise<{ [k: string]: any }>;
+  public isConnected(): boolean;
+  public isConnectedAsync(): boolean;
+}
+export default HttpProvider;
diff --git a/types/util/keyStore.d.ts b/types/util/keyStore.d.ts
new file mode 100644
index 00000000..278c8744
--- /dev/null
+++ b/types/util/keyStore.d.ts
@@ -0,0 +1,51 @@
+import { IWallet } from "../wallet";
+
+interface IOptions {
+  dklen: number;
+  n: number;
+  r: number;
+  p: number;
+  cipher: string;
+}
+interface IKdfparams {
+  dklen: number;
+  n: number;
+  r: number;
+  p: number;
+  salt: string;
+}
+type TWalletInfo = IWallet & {
+  nickName?: string;
+};
+interface ICipherparams {
+  iv: string;
+}
+interface ICrypto {
+  cipher: string;
+  cipherparams: ICipherparams;
+  ciphertext: string;
+  kdf: string;
+  kdfparams: IKdfparams;
+  mac: string;
+  mnemonicEncrypted: string;
+}
+interface IkeyStore {
+  version: number;
+  type: string;
+  nickName?: string;
+  address: string;
+  crypto: ICrypto;
+}
+export declare function getKeystore(
+  walletInfoInput: TWalletInfo,
+  password: string,
+  option?: IOptions
+): IkeyStore;
+export declare function unlockKeystore(
+  keyStoreInput: IkeyStore,
+  password: string
+): TWalletInfo;
+export declare function checkPassword(
+  keyStoreInput: IkeyStore,
+  password: string
+): boolean;
diff --git a/types/util/merkleTree.d.ts b/types/util/merkleTree.d.ts
new file mode 100644
index 00000000..f371882d
--- /dev/null
+++ b/types/util/merkleTree.d.ts
@@ -0,0 +1,7 @@
+type Message = string | number[] | ArrayBuffer | Uint8Array;
+export declare function computeRoot(data: Array<Buffer>): Buffer;
+export declare function getMerklePath(
+  index: number,
+  data: Array<Buffer>
+): Array<Buffer> | null;
+export function node(buffer: Message): Buffer;
diff --git a/types/util/proto.d.ts b/types/util/proto.d.ts
new file mode 100644
index 00000000..013a56e8
--- /dev/null
+++ b/types/util/proto.d.ts
@@ -0,0 +1,50 @@
+import * as protobuf from "@aelfqueen/protobufjs/light";
+export interface IAddress {
+  value: Uint8Array;
+}
+export interface ITransaction {
+  from: IAddress;
+  to: IAddress;
+  methodName: string;
+  params: string;
+}
+
+export const coreRootProto: protobuf.Root;
+export const Transaction: protobuf.Type;
+export const Hash: protobuf.Type;
+export const Address: protobuf.Type;
+export const TransactionFeeCharged: protobuf.Type;
+export const ResourceTokenCharged: protobuf.Type;
+export function getFee(
+  base64Str: string,
+  type?: string
+): { [k: string]: any } | undefined | null;
+
+interface ILog {
+  Address: string;
+  Name: string;
+  Indexed: Array<string> | null;
+  NonIndexed: string;
+}
+export function getSerializedDataFromLog(log: ILog): string;
+export function getResourceFee(
+  Logs?: Array<ILog>
+): Array<{ [k: string]: any } | undefined | null>;
+export function getTransactionFee(
+  Logs?: Array<ILog>
+): Array<{ [k: string]: any } | undefined | null>;
+
+export function arrayBufferToHex(arrayBuffer: Buffer): string;
+export function getRepForAddress(address: { [k: string]: any }): string;
+export function getAddressFromRep(rep: string): protobuf.Message<{}>;
+export function getAddressObjectFromRep(rep: string): { [k: string]: any };
+export function getRepForHash(hash: protobuf.Message<{}>): string;
+export function getHashFromHex(hex: string): protobuf.Message<{}>;
+export function getHashObjectFromHex(hex: string): { [k: string]: any };
+export function encodeTransaction(tx: { [k: string]: any }): Uint8Array;
+export function getTransaction(
+  from: string,
+  to: string,
+  methodName: string,
+  params: Uint8Array
+): protobuf.Message<{}>;
diff --git a/types/util/requestManage.d.ts b/types/util/requestManage.d.ts
new file mode 100644
index 00000000..1d513b5c
--- /dev/null
+++ b/types/util/requestManage.d.ts
@@ -0,0 +1,22 @@
+import HttpProvider from "./httpProvider";
+interface IRequestBody {
+  requestMethod: string;
+  method: Function;
+  params: { [k: string]: any };
+}
+interface IPrepareResult {
+  method: string;
+  url: Function;
+  params: { [k in string]: any };
+}
+declare class RequestManager {
+  constructor(provider: HttpProvider);
+  public static prepareRequest({
+    requestMethod,
+    method,
+    params,
+  }: IRequestBody): IPrepareResult;
+  public setProvider(provider: HttpProvider): void;
+  public send(requestBody: IRequestBody): Response;
+  public sendAsync(requestBody: IRequestBody): Promise<any>;
+}
diff --git a/types/util/settings.d.ts b/types/util/settings.d.ts
new file mode 100644
index 00000000..ab3e8089
--- /dev/null
+++ b/types/util/settings.d.ts
@@ -0,0 +1,4 @@
+declare class Settings {
+  constructor();
+}
+export default Settings;
diff --git a/types/util/transform.d.ts b/types/util/transform.d.ts
new file mode 100644
index 00000000..0d280514
--- /dev/null
+++ b/types/util/transform.d.ts
@@ -0,0 +1,29 @@
+import * as protobuf from "@aelfqueen/protobufjs";
+interface IInTransformer {
+  filter: (resolvedType: protobuf.Type) => boolean;
+  transformer: (origin: string | Array<string>) => {
+    value: string | Array<string>;
+  };
+}
+interface IOutTransformer {
+  filter: (resolvedType: protobuf.Type) => boolean;
+  transformer: (origin: string | Array<string>) => string | Array<string>;
+}
+
+export function transform(
+  inputType: protobuf.Type,
+  origin: { [k: string]: any },
+  transformers?: Array<IInTransformer | IOutTransformer>
+): { [k: string]: any } | undefined | null;
+
+export function transformMapToArray(
+  inputType: protobuf.Type,
+  origin?: { [k: string]: any }
+): { [k: string]: any } | Array<{ [k: string]: any }> | undefined | null;
+export function transformArrayToMap(
+  inputType: protobuf.Type,
+  origin?: { [k: string]: any } | Array<{ [k: string]: any }>
+): { [k: string]: any } | undefined | null;
+export const INPUT_TRANSFORMERS: IInTransformer;
+export function encodeAddress(str: string): string;
+export const OUTPUT_TRANSFORMERS: IOutTransformer[];
diff --git a/types/util/utils.d.ts b/types/util/utils.d.ts
new file mode 100644
index 00000000..5ddca7d4
--- /dev/null
+++ b/types/util/utils.d.ts
@@ -0,0 +1,68 @@
+import BigNumber from "bignumber.js";
+import * as protobuf from "@aelfqueen/protobufjs/light";
+export interface base58 {
+  encode(data: ArrayBuffer | SharedArrayBuffer, encoding?: number): string;
+  decode(str: string, encoding?: string): Buffer;
+}
+export interface chainIdConvertor {
+  chainIdToBase58(chainId: string): string;
+  base58ToChainId(base58String: string): Buffer;
+}
+export declare function arrayToHex(value: Buffer): string;
+export declare function padLeft(
+  string: string,
+  charLen: number,
+  sign?: string
+): string;
+export declare function padRight(
+  string: string,
+  charLen: number,
+  sign?: string
+): string;
+export declare function decodeAddressRep(address: string): string;
+export declare function encodeAddressRep(hex: string): string;
+export declare function isBigNumber(object: any): boolean;
+export declare function isString(object: any): boolean;
+export declare function isFunction(object: any): boolean;
+export declare function isObject(object: any): boolean;
+export declare function isBoolean(object: any): boolean;
+export declare function isJson(str: string): boolean;
+
+export declare function toBigNumber(
+  number: number | string | BigNumber
+): BigNumber;
+export declare function getValueOfUnit(unit: string): BigNumber;
+
+export declare function fromWei(
+  number: number | string,
+  unit: string
+): string | BigNumber;
+export declare function toWei(
+  number: number | string | BigNumber,
+  unit: string
+): string | BigNumber;
+export declare function toTwosComplement(
+  number: number | string | BigNumber
+): BigNumber;
+export declare function uint8ArrayToHex(uint8Array: Uint8Array): string;
+
+export declare function noop(): void;
+export declare function setPath(obj: any, path: string, value: any): void;
+interface IUnpackSpecifiedParams {
+  data: ArrayBuffer | SharedArrayBuffer;
+  dataType: protobuf.Type;
+  encoding?: string;
+}
+export declare function unpackSpecifiedTypeData({
+  data,
+  dataType,
+  encoding,
+}: IUnpackSpecifiedParams): { [k: string]: any };
+export declare function deserializeTransaction(
+  rawTx: ArrayBuffer | SharedArrayBuffer,
+  paramsDataType: protobuf.Type
+): { [k: string]: any };
+export declare function getAuthorization(
+  userName: string,
+  password: string
+): string;
diff --git a/types/wallet/index.d.ts b/types/wallet/index.d.ts
new file mode 100644
index 00000000..4027c26a
--- /dev/null
+++ b/types/wallet/index.d.ts
@@ -0,0 +1,37 @@
+import HDNode = require("hdkey");
+import * as Bip39 from "bip39";
+import { ec, curve } from "elliptic";
+import { ITransaction } from "../util/proto";
+import * as KeyStore from "../util/keyStore";
+
+export default Wallet;
+
+interface ISignature {
+  signature: Uint8Array;
+}
+type TSignTransaction = ISignature & ITransaction;
+
+export interface IWallet {
+  BIP44Path: string;
+  address: string;
+  childWallet: IWallet | string;
+  keyPair: ec.KeyPair;
+  mnemonic: string;
+  privateKey: string;
+}
+
+declare class Wallet {
+  ellipticEc: ec;
+  hdkey: HDNode;
+  bip39: typeof Bip39;
+  keyStore: typeof KeyStore;
+  AESEncrypt(input: string, password: string): string;
+  AESDescrypt(input: string, password: string): string;
+  getSignature(bytesToBeSign: string, keyPair: ec.KeyPair): Buffer;
+  getAddressFromPubKey(pubKey: curve.base.BasePoint): string;
+  createNewWallet(BIP44Path?: string): IWallet;
+  getWalletByMnemonic(mnemonic: string, BIP44Path: string): IWallet;
+  getWalletByPrivateKey(privateKey: string): IWallet;
+  signTransaction(rawTxn: ITransaction, keyPair: ec.KeyPair): TSignTransaction;
+  sign(hexString: string, keyPair: ec.KeyPair): Buffer;
+}
diff --git a/yarn.lock b/yarn.lock
index db8abdb5..d9ae9380 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1005,6 +1005,20 @@
   dependencies:
     "@babel/types" "^7.3.0"
 
+"@types/bn.js@*":
+  version "5.1.1"
+  resolved "https://registry.npmjs.org/@types/bn.js/-/bn.js-5.1.1.tgz#b51e1b55920a4ca26e9285ff79936bbdec910682"
+  integrity sha512-qNrYbZqMx0uJAfKnKclPh+dTwK33KfLHYqtyODwd5HnXOjnkhc4qgn3BrK6RWyGZm5+sIFE7Q7Vz6QQtJB7w7g==
+  dependencies:
+    "@types/node" "*"
+
+"@types/elliptic@^6.4.14":
+  version "6.4.14"
+  resolved "https://registry.npmjs.org/@types/elliptic/-/elliptic-6.4.14.tgz#7bbaad60567a588c1f08b10893453e6b9b4de48e"
+  integrity sha512-z4OBcDAU0GVwDTuwJzQCiL6188QvZMkvoERgcVjq0/mPM8jCfdwZ3x5zQEVoL9WCAru3aG5wl3Z5Ww5wBWn7ZQ==
+  dependencies:
+    "@types/bn.js" "*"
+
 "@types/events@*":
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/@types/events/-/events-3.0.0.tgz#2862f3f58a9a7f7c3e78d79f130dd4d71c25c2a7"
@@ -1019,6 +1033,13 @@
     "@types/minimatch" "*"
     "@types/node" "*"
 
+"@types/hdkey@^2.0.1":
+  version "2.0.1"
+  resolved "https://registry.npmjs.org/@types/hdkey/-/hdkey-2.0.1.tgz#ab46597562d977b229704c7f19949953b936b6a3"
+  integrity sha512-4s6jhP0BT3sWBaRo0BfA3BpFllQvuRlXUzIqnuvSNmPhmMCZYjhrDe31nJb8kJLc0ZVdqj9Ep9eH2RGBNCK9Sw==
+  dependencies:
+    "@types/node" "*"
+
 "@types/istanbul-lib-coverage@*", "@types/istanbul-lib-coverage@^2.0.0":
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/@types/istanbul-lib-coverage/-/istanbul-lib-coverage-2.0.1.tgz#42995b446db9a48a11a07ec083499a860e9138ff"
@@ -1096,6 +1117,50 @@
   dependencies:
     "@types/yargs-parser" "*"
 
+"@typescript-eslint/parser@^5.47.1":
+  version "5.47.1"
+  resolved "https://registry.npmjs.org/@typescript-eslint/parser/-/parser-5.47.1.tgz#c4bf16f8c3c7608ce4bf8ff804b677fc899f173f"
+  integrity sha512-9Vb+KIv29r6GPu4EboWOnQM7T+UjpjXvjCPhNORlgm40a9Ia9bvaPJswvtae1gip2QEeVeGh6YquqAzEgoRAlw==
+  dependencies:
+    "@typescript-eslint/scope-manager" "5.47.1"
+    "@typescript-eslint/types" "5.47.1"
+    "@typescript-eslint/typescript-estree" "5.47.1"
+    debug "^4.3.4"
+
+"@typescript-eslint/scope-manager@5.47.1":
+  version "5.47.1"
+  resolved "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-5.47.1.tgz#0d302b3c2f20ab24e4787bf3f5a0d8c449b823bd"
+  integrity sha512-9hsFDsgUwrdOoW1D97Ewog7DYSHaq4WKuNs0LHF9RiCmqB0Z+XRR4Pf7u7u9z/8CciHuJ6yxNws1XznI3ddjEw==
+  dependencies:
+    "@typescript-eslint/types" "5.47.1"
+    "@typescript-eslint/visitor-keys" "5.47.1"
+
+"@typescript-eslint/types@5.47.1":
+  version "5.47.1"
+  resolved "https://registry.npmjs.org/@typescript-eslint/types/-/types-5.47.1.tgz#459f07428aec5a8c4113706293c2ae876741ac8e"
+  integrity sha512-CmALY9YWXEpwuu6377ybJBZdtSAnzXLSQcxLSqSQSbC7VfpMu/HLVdrnVJj7ycI138EHqocW02LPJErE35cE9A==
+
+"@typescript-eslint/typescript-estree@5.47.1":
+  version "5.47.1"
+  resolved "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-5.47.1.tgz#b9d8441308aca53df7f69b2c67a887b82c9ed418"
+  integrity sha512-4+ZhFSuISAvRi2xUszEj0xXbNTHceV9GbH9S8oAD2a/F9SW57aJNQVOCxG8GPfSWH/X4eOPdMEU2jYVuWKEpWA==
+  dependencies:
+    "@typescript-eslint/types" "5.47.1"
+    "@typescript-eslint/visitor-keys" "5.47.1"
+    debug "^4.3.4"
+    globby "^11.1.0"
+    is-glob "^4.0.3"
+    semver "^7.3.7"
+    tsutils "^3.21.0"
+
+"@typescript-eslint/visitor-keys@5.47.1":
+  version "5.47.1"
+  resolved "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-5.47.1.tgz#d35c2da544dbb685db9c5b5b85adac0a1d74d1f2"
+  integrity sha512-rF3pmut2JCCjh6BLRhNKdYjULMb1brvoaiWDlHfLNVgmnZ0sBVJrs3SyaKE1XoDDnJuAx/hDQryHYmPUuNq0ig==
+  dependencies:
+    "@typescript-eslint/types" "5.47.1"
+    eslint-visitor-keys "^3.3.0"
+
 "@webassemblyjs/ast@1.8.5":
   version "1.8.5"
   resolved "https://registry.yarnpkg.com/@webassemblyjs/ast/-/ast-1.8.5.tgz#51b1c5fe6576a34953bf4b253df9f0d490d9e359"
@@ -1780,7 +1845,7 @@ braces@^2.3.1, braces@^2.3.2:
     split-string "^3.0.2"
     to-regex "^3.0.1"
 
-braces@^3.0.1:
+braces@^3.0.1, braces@^3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/braces/-/braces-3.0.2.tgz#3454e1a462ee8d599e236df336cd9ea4f8afe107"
   integrity sha512-b8um+L1RzM3WDSzvhm6gIz1yfTbBt6YTlcEKAvsmqCZZFw46z626lVj9j1yEPW33H5H+lBQpZMP1k8l+78Ha0A==
@@ -2761,6 +2826,13 @@ debug@^4.0.1, debug@^4.1.0, debug@^4.1.1:
   dependencies:
     ms "^2.1.1"
 
+debug@^4.3.4:
+  version "4.3.4"
+  resolved "https://registry.npmjs.org/debug/-/debug-4.3.4.tgz#1319f6579357f2338d3337d2cdd4914bb5dcc865"
+  integrity sha512-PRWFHuSU3eDtQJPvnNY7Jcket1j0t5OuOsFzPPzsekD52Zl8qUfFIPEiswXqIvHWGVHOgX+7G/vCNNhehwxfkQ==
+  dependencies:
+    ms "2.1.2"
+
 decamelize-keys@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/decamelize-keys/-/decamelize-keys-1.1.0.tgz#d171a87933252807eb3cb61dc1c1445d078df2d9"
@@ -3208,6 +3280,11 @@ eslint-visitor-keys@^1.0.0, eslint-visitor-keys@^1.1.0:
   resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-1.1.0.tgz#e2a82cea84ff246ad6fb57f9bde5b46621459ec2"
   integrity sha512-8y9YjtM1JBJU/A9Kc+SbaOV4y29sSWckBwMHa+FGtVj5gN/sbnKDf6xJUl+8g7FAij9LVaP8C24DUiH/f/2Z9A==
 
+eslint-visitor-keys@^3.3.0:
+  version "3.3.0"
+  resolved "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-3.3.0.tgz#f6480fa6b1f30efe2d1968aa8ac745b862469826"
+  integrity sha512-mQ+suqKJVyeuwGYHAdjMFqjCyfl8+Ldnxuyp3ldiMBFKkvytrXUZWaiPCEav8qDHKty44bD+qV1IP4T+w+xXRA==
+
 eslint@^6.0.1:
   version "6.8.0"
   resolved "https://registry.yarnpkg.com/eslint/-/eslint-6.8.0.tgz#62262d6729739f9275723824302fb227c8c93ffb"
@@ -3487,6 +3564,17 @@ fast-glob@^3.0.3:
     merge2 "^1.3.0"
     micromatch "^4.0.2"
 
+fast-glob@^3.2.9:
+  version "3.2.12"
+  resolved "https://registry.npmjs.org/fast-glob/-/fast-glob-3.2.12.tgz#7f39ec99c2e6ab030337142da9e0c18f37afae80"
+  integrity sha512-DVj4CQIYYow0BlaelwK1pHl5n5cRSJfM60UA0zK891sVInoPri2Ekj7+e1CT3/3qxXenpI+nBBmQAcJPJgaj4w==
+  dependencies:
+    "@nodelib/fs.stat" "^2.0.2"
+    "@nodelib/fs.walk" "^1.2.3"
+    glob-parent "^5.1.2"
+    merge2 "^1.3.0"
+    micromatch "^4.0.4"
+
 fast-json-stable-stringify@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/fast-json-stable-stringify/-/fast-json-stable-stringify-2.1.0.tgz#874bf69c6f404c2b5d99c481341399fd55892633"
@@ -3906,6 +3994,13 @@ glob-parent@^5.0.0, glob-parent@^5.1.0:
   dependencies:
     is-glob "^4.0.1"
 
+glob-parent@^5.1.2:
+  version "5.1.2"
+  resolved "https://registry.npmjs.org/glob-parent/-/glob-parent-5.1.2.tgz#869832c58034fe68a4093c17dc15e8340d8401c4"
+  integrity sha512-AOIgSQCepiJYwP3ARnGx+5VnTu2HBYdzbGP45eLw1vr3zB3vZLeyed1sC9hnbcOc9/SrMyM5RPQrkGz4aS9Zow==
+  dependencies:
+    is-glob "^4.0.1"
+
 glob@7.1.4:
   version "7.1.4"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.4.tgz#aa608a2f6c577ad357e1ae5a5c26d9a8d1969255"
@@ -4007,6 +4102,18 @@ globby@^10.0.1:
     merge2 "^1.2.3"
     slash "^3.0.0"
 
+globby@^11.1.0:
+  version "11.1.0"
+  resolved "https://registry.npmjs.org/globby/-/globby-11.1.0.tgz#bd4be98bb042f83d796f7e3811991fbe82a0d34b"
+  integrity sha512-jhIXaOzy1sb8IyocaruWSn1TjmnBVs8Ayhcy83rmxNJ8q2uWKCAj3CnJY+KpGSXCueAPc0i05kVvVKtP1t9S3g==
+  dependencies:
+    array-union "^2.1.0"
+    dir-glob "^3.0.1"
+    fast-glob "^3.2.9"
+    ignore "^5.2.0"
+    merge2 "^1.4.1"
+    slash "^3.0.0"
+
 graceful-fs@^4.1.11, graceful-fs@^4.1.15, graceful-fs@^4.1.2, graceful-fs@^4.1.6, graceful-fs@^4.2.0, graceful-fs@^4.2.2:
   version "4.2.3"
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.3.tgz#4a12ff1b60376ef09862c2093edd908328be8423"
@@ -4266,6 +4373,11 @@ ignore@^5.1.1:
   resolved "https://registry.yarnpkg.com/ignore/-/ignore-5.1.4.tgz#84b7b3dbe64552b6ef0eca99f6743dbec6d97adf"
   integrity sha512-MzbUSahkTW1u7JpKKjY7LCARd1fU5W2rLdxlM4kdkayuCwZImjkpluF9CM1aLewYJguPDqewLam18Y6AU69A8A==
 
+ignore@^5.2.0:
+  version "5.2.4"
+  resolved "https://registry.npmjs.org/ignore/-/ignore-5.2.4.tgz#a291c0c6178ff1b960befe47fcdec301674a6324"
+  integrity sha512-MAb38BcSbH0eHNBxn7ql2NH/kX33OkB3lZ1BNdh7ENeRChHTYsTvWrMubiIAMNS2llXEEgZ1MUOBtXChP3kaFQ==
+
 import-fresh@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/import-fresh/-/import-fresh-2.0.0.tgz#d81355c15612d386c61f9ddd3922d4304822a546"
@@ -4572,6 +4684,13 @@ is-glob@^4.0.0, is-glob@^4.0.1:
   dependencies:
     is-extglob "^2.1.1"
 
+is-glob@^4.0.3:
+  version "4.0.3"
+  resolved "https://registry.npmjs.org/is-glob/-/is-glob-4.0.3.tgz#64f61e42cbbb2eec2071a9dac0b28ba1e65d5084"
+  integrity sha512-xelSayHH36ZgE7ZWhli7pW34hNbNl8Ojv5KVmkJD4hBdD3th8Tfk9vYasLM+mXWOZhFkgZfxhLSnrwRr4elSSg==
+  dependencies:
+    is-extglob "^2.1.1"
+
 is-nan@^1.2.1:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/is-nan/-/is-nan-1.3.0.tgz#85d1f5482f7051c2019f5673ccebdb06f3b0db03"
@@ -5718,6 +5837,11 @@ merge2@^1.2.3, merge2@^1.3.0:
   resolved "https://registry.yarnpkg.com/merge2/-/merge2-1.3.0.tgz#5b366ee83b2f1582c48f87e47cf1a9352103ca81"
   integrity sha512-2j4DAdlBOkiSZIsaXk4mTE3sRS02yBHAtfy127xRV3bQUFqXkjHCHLW6Scv7DwNRbIWNHH8zpnz9zMaKXIdvYw==
 
+merge2@^1.4.1:
+  version "1.4.1"
+  resolved "https://registry.npmjs.org/merge2/-/merge2-1.4.1.tgz#4368892f885e907455a6fd7dc55c0c9d404990ae"
+  integrity sha512-8q7VEgMJW4J8tcfVPy8g09NcQwZdbwFEqhe/WZkoIzjn/3TGDwtOCYtXGxA3O8tPzpczCCDgv+P2P5y00ZJOOg==
+
 merge@^1.2.1:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/merge/-/merge-1.2.1.tgz#38bebf80c3220a8a487b6fcfb3941bb11720c145"
@@ -5755,6 +5879,14 @@ micromatch@^4.0.2:
     braces "^3.0.1"
     picomatch "^2.0.5"
 
+micromatch@^4.0.4:
+  version "4.0.5"
+  resolved "https://registry.npmjs.org/micromatch/-/micromatch-4.0.5.tgz#bc8999a7cbbf77cdc89f132f6e467051b49090c6"
+  integrity sha512-DMy+ERcEW2q8Z2Po+WNXuw3c5YaUSFjAO5GsJqfEl7UjvtIuFKO6ZrKvcItdy98dwFI2N1tg3zNIdKaQT+aNdA==
+  dependencies:
+    braces "^3.0.2"
+    picomatch "^2.3.1"
+
 miller-rabin@^4.0.0:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/miller-rabin/-/miller-rabin-4.0.1.tgz#f080351c865b0dc562a8462966daa53543c78a4d"
@@ -5911,7 +6043,7 @@ ms@2.1.1:
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.1.tgz#30a5864eb3ebb0a66f2ebe6d727af06a09d86e0a"
   integrity sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg==
 
-ms@^2.1.1:
+ms@2.1.2, ms@^2.1.1:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.2.tgz#d09d1f357b443f493382a8eb3ccd183872ae6009"
   integrity sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==
@@ -6548,6 +6680,11 @@ picomatch@^2.0.5:
   resolved "https://registry.yarnpkg.com/picomatch/-/picomatch-2.2.1.tgz#21bac888b6ed8601f831ce7816e335bc779f0a4a"
   integrity sha512-ISBaA8xQNmwELC7eOjqFKMESB2VIqt4PPDD0nsS95b/9dZXvVKOlz9keMSnoGGKcOHXfTvDD6WMaRoSc9UuhRA==
 
+picomatch@^2.3.1:
+  version "2.3.1"
+  resolved "https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz#3ba3833733646d9d3e4995946c1365a67fb07a42"
+  integrity sha512-JU3teHTNjmE2VCGFzuY8EXzCDVwEqB2a8fsIvwaStHhAWJEeVd1o1QD80CU6+ZdEXXSLbSsuLwJjkCBWqRQUVA==
+
 pify@^2.0.0, pify@^2.3.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/pify/-/pify-2.3.0.tgz#ed141a6ac043a849ea588498e7dca8b15330e90c"
@@ -7370,6 +7507,13 @@ semver@^7.1.1, semver@^7.3.2:
   dependencies:
     lru-cache "^6.0.0"
 
+semver@^7.3.7:
+  version "7.3.8"
+  resolved "https://registry.npmjs.org/semver/-/semver-7.3.8.tgz#07a78feafb3f7b32347d725e33de7e2a2df67798"
+  integrity sha512-NB1ctGL5rlHrPJtFDVIVzTyQylMLu9N9VICA6HSFJo8MCGVTMW6gfpicwKmmK/dAjTOrqu5l63JJOpDSrAis3A==
+  dependencies:
+    lru-cache "^6.0.0"
+
 send@0.17.1:
   version "0.17.1"
   resolved "https://registry.yarnpkg.com/send/-/send-0.17.1.tgz#c1d8b059f7900f7466dd4938bdc44e11ddb376c8"
@@ -8144,11 +8288,23 @@ tryer@^1.0.1:
   resolved "https://registry.yarnpkg.com/tryer/-/tryer-1.0.1.tgz#f2c85406800b9b0f74c9f7465b81eaad241252f8"
   integrity sha512-c3zayb8/kWWpycWYg87P71E1S1ZL6b6IJxfb5fvsUgsf0S2MVGaDhDXXjDMpdCpfWXqptc+4mXwmiy1ypXqRAA==
 
+tslib@^1.8.1:
+  version "1.14.1"
+  resolved "https://registry.npmjs.org/tslib/-/tslib-1.14.1.tgz#cf2d38bdc34a134bcaf1091c41f6619e2f672d00"
+  integrity sha512-Xni35NKzjgMrwevysHTCArtLDpPvye8zV/0E4EyYn43P7/7qvQwPh9BGkHewbMulVntbigmcT7rdX3BNo9wRJg==
+
 tslib@^1.9.0:
   version "1.10.0"
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.10.0.tgz#c3c19f95973fb0a62973fb09d90d961ee43e5c8a"
   integrity sha512-qOebF53frne81cf0S9B41ByenJ3/IuH8yJKngAX35CmiZySA0khhkovshKK+jGCaMnVomla7gVlIcc3EvKPbTQ==
 
+tsutils@^3.21.0:
+  version "3.21.0"
+  resolved "https://registry.npmjs.org/tsutils/-/tsutils-3.21.0.tgz#b48717d394cea6c1e096983eed58e9d61715b623"
+  integrity sha512-mHKK3iUXL+3UF6xL5k0PEhKRUBKPBCv/+RkEOpjRWxxx27KKRBmmA60A9pgOUvMi8GKhRMPEmjBRPzs2W7O1OA==
+  dependencies:
+    tslib "^1.8.1"
+
 tty-browserify@0.0.0:
   version "0.0.0"
   resolved "https://registry.yarnpkg.com/tty-browserify/-/tty-browserify-0.0.0.tgz#a157ba402da24e9bf957f9aa69d524eed42901a6"