diff --git a/docs/.gitkeep b/docs/README.md
similarity index 100%
rename from docs/.gitkeep
rename to docs/README.md
diff --git a/package.json b/package.json
index 2913528..13633ad 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,6 @@
     "dist": "yarn packages:bundler && yarn bundle:webpack",
     "packages:cleanUnexpected": "gulp cleanUnexpected",
     "packages:clean": "gulp cleanServer && yarn packages:cleanUnexpected",
-    "packages:cleanDocs": "gulp cleanDocs",
     "packages:bundler": "yarn packages:clean && yarn build:ts && ts-node -P scripts/tsconfig.json scripts/bundle.ts",
     "schema": "ts-node -P scripts/tsconfig.json scripts/typings/schema.ts core",
     "test": "cross-env TEST_ENV=unit jest -c scripts/jest/jest.config.js --rootDir=.",
@@ -28,7 +27,10 @@
     "test:e2e": "cross-env TEST_ENV=e2e jest -c ./scripts/jest/jest.e2e.config.js --runInBand --verbose --collectCoverage=false",
     "docs:vue": "ts-node -P scripts/tsconfig.json scripts/docs.ts vuepress",
     "docs:gitbook": "ts-node -P scripts/tsconfig.json scripts/docs.ts gitbook",
-    "docs:build": "ts-node -P scripts/tsconfig.json scripts/docs.ts docusaurus,vuepress,gitbook,bitbucket,default",
+    "docs:docusaurus": "ts-node -P scripts/tsconfig.json scripts/docs.ts docusaurus",
+    "docs:bitbucket": "ts-node -P scripts/tsconfig.json scripts/docs.ts bitbucket",
+    "docs:default": "ts-node -P scripts/tsconfig.json scripts/docs.ts default",
+    "docs:clean": "gulp cleanDocs",
     "docs:bundler": "yarn packages:cleanDocs && yarn docs:build",
     "release": "yarn bootstrap && yarn bundle && lerna publish --exact",
     "format": "prettier --write '**/*.{ts,tsx,js}' --config .prettierrc",
diff --git a/packages/harmony-account/src/hdnode.ts b/packages/harmony-account/src/hdnode.ts
index 4d6d9d8..2103782 100644
--- a/packages/harmony-account/src/hdnode.ts
+++ b/packages/harmony-account/src/hdnode.ts
@@ -1,19 +1,47 @@
+import {bip39, hdkey, getAddress, BN, Signature} from '@harmony-js/crypto';
 import {
-  bip39,
-  hdkey,
-  encryptPhrase,
-  decryptPhrase,
-  EncryptOptions,
-} from '@harmony-js/crypto';
-import { HDPath } from '@harmony-js/utils';
+  HDPath,
+  // defineReadOnly,
+  isHttp,
+  isWs,
+  ChainID,
+  ChainType,
+  Unit,
+  isHex,
+  numberToHex,
+} from '@harmony-js/utils';
+import {Messenger, HttpProvider, WSProvider} from '@harmony-js/network';
+import {
+  Transaction,
+  TxStatus,
+  RLPSign,
+  TransasctionReceipt,
+} from '@harmony-js/transaction';
+import {Account} from './account';
 
-export class HDNode extends hdkey {
-  static new() {
-    return new HDNode(bip39.generateMnemonic(), 0);
-  }
-  static add(phrase: string, index: number) {
-    return new HDNode(phrase, index);
-  }
+interface WalletsInterfaces {
+  [key: string]: Account;
+}
+
+interface Web3TxPrams {
+  id?: string;
+  from?: string;
+  to?: string;
+  nonce?: number | string;
+  gasLimit?: BN | number | string;
+  gasPrice?: BN | number | string;
+  shardID?: number | string;
+  toShardID?: number | string;
+  data?: string;
+  value?: BN;
+  chainId?: number;
+  rawTransaction?: string;
+  unsignedRawTransaction?: string;
+  signature?: Signature | string;
+  receipt?: TransasctionReceipt;
+}
+
+export class HDNode {
   static isValidMnemonic(phrase: string): boolean {
     if (phrase.trim().split(/\s+/g).length < 12) {
       return false;
@@ -23,60 +51,148 @@ export class HDNode extends hdkey {
   static generateMnemonic(): string {
     return bip39.generateMnemonic();
   }
+  public provider: HttpProvider | WSProvider;
+  private messenger: Messenger;
+  private hdwallet: hdkey | undefined;
   private path: string;
-  private mnemonic?: string;
-  private entropy?: string;
-  private childKey?: hdkey;
+  private index: number;
+  private addressCount: number;
+  private addresses: string[];
+  private wallets: WalletsInterfaces;
 
-  constructor(menmonic?: string, index: number = 0) {
-    super();
+  constructor(
+    provider: string | HttpProvider | WSProvider = 'http://localhost:9500',
+    menmonic?: string,
+    index: number = 0,
+    addressCount: number = 1,
+    chainType: ChainType = ChainType.Harmony,
+    chainId: ChainID = ChainID.Default,
+  ) {
+    this.provider = this.setProvider(provider);
+    this.messenger = new Messenger(this.provider, chainType, chainId);
+    this.hdwallet = undefined;
+    this.addresses = [];
+    this.wallets = {};
     this.path = HDPath;
-    this.mnemonic = menmonic;
-    this.entropy = this.mnemonic ? this.getEntropy(this.mnemonic) : undefined;
-    this.childKey = this.entropy
-      ? this.getChildKey(this.entropy, index)
-      : undefined;
+    this.index = index;
+    this.addressCount = addressCount;
+    this.getHdWallet(menmonic || HDNode.generateMnemonic());
   }
 
-  getEntropy(mnemonic: string) {
-    return bip39.mnemonicToEntropy(mnemonic);
+  normalizePrivateKeys(mnemonic: string | string[]) {
+    if (Array.isArray(mnemonic)) {
+      return mnemonic;
+    } else if (mnemonic && !mnemonic.includes(' ')) {
+      return [mnemonic];
+    } else {
+      return false;
+    }
   }
-  getChildKey(entropy: string, index: number) {
-    const master = HDNode.fromMasterSeed(Buffer.from(entropy, 'hex'));
-    return master.derive(`${this.path}${index}`);
+
+  setProvider(provider: string | HttpProvider | WSProvider) {
+    if (isHttp(provider) && typeof provider === 'string') {
+      return new HttpProvider(provider);
+    } else if (provider instanceof HttpProvider) {
+      return provider;
+    } else if (isWs(provider) && typeof provider === 'string') {
+      return new WSProvider(provider);
+    } else if (provider instanceof WSProvider) {
+      return provider;
+    } else {
+      throw new Error('provider is not recognized');
+    }
   }
 
-  async lock(password: string, options: EncryptOptions) {
-    if (this.mnemonic && HDNode.isValidMnemonic(this.mnemonic)) {
-      try {
-        this.mnemonic = await encryptPhrase(this.mnemonic, password, options);
-      } catch (error) {
-        throw error;
+  getHdWallet(mnemonic: string) {
+    if (!HDNode.isValidMnemonic(mnemonic)) {
+      throw new Error('Mnemonic invalid or undefined');
+    }
+    this.hdwallet = hdkey.fromMasterSeed(bip39.mnemonicToSeed(mnemonic));
+
+    for (let i = this.index; i < this.index + this.addressCount; i++) {
+      if (!this.hdwallet) {
+        throw new Error('hdwallet is not found');
       }
-    } else {
-      throw new Error('mnemonic is not valid');
+      const childKey = this.hdwallet.derive(`${this.path}${i}`);
+      const prv = childKey.privateKey.toString('hex');
+      const account = new Account(prv);
+      const addr = account.checksumAddress;
+      this.addresses.push(addr);
+      this.wallets[addr] = account;
     }
   }
+  send(
+    ...args: [string, (string | any[] | undefined)?, (string | undefined)?]
+  ) {
+    this.messenger.send.apply(this.messenger, args);
+  }
 
-  async unlock(password: string) {
-    if (this.mnemonic) {
-      try {
-        this.mnemonic = await decryptPhrase(
-          JSON.parse(this.mnemonic),
-          password,
-        );
-      } catch (error) {
-        throw error;
+  sendAsync(
+    ...args: [string, (string | any[] | undefined)?, (string | undefined)?]
+  ) {
+    this.send(...args);
+  }
+  // tslint:disable-next-line: ban-types
+  getAccounts(cb?: Function) {
+    if (cb) {
+      cb(null, this.addresses);
+    }
+    return this.addresses;
+  }
+  // tslint:disable-next-line: ban-types
+  getPrivateKey(address: string, cb?: Function) {
+    if (!cb) {
+      if (!this.wallets[address]) {
+        throw new Error('Account not found');
+      } else {
+        return this.wallets[address].privateKey;
       }
+    }
+    if (!this.wallets[address]) {
+      return cb('Account not found');
     } else {
-      throw new Error('mnemonic is not valid');
+      cb(null, this.wallets[address].privateKey);
     }
   }
+  signTransaction(txParams: any | Web3TxPrams, cb: Function) {
+    const from: string = getAddress(txParams.from).checksum;
+    const to: string = getAddress(txParams.to).checksum;
+    const gasLimit = isHex(txParams.gasLimit)
+      ? txParams.gasLimit
+      : new Unit(txParams.gasLimit).asWei().toWei();
+    const gasPrice = isHex(txParams.gasPrice)
+      ? txParams.gasPrice
+      : new Unit(txParams.gasPrice).asWei().toWei();
+    const value = isHex(txParams.value)
+      ? txParams.value
+      : numberToHex(txParams.value);
+    const nonce = isHex(txParams.nonce)
+      ? txParams.nonce
+      : numberToHex(txParams.nonce);
+    const prv = this.wallets[from].privateKey;
 
-  get _privateKey() {
-    return this.childKey ? this.childKey.privateKey.toString('hex') : '';
+    const tx = new Transaction(
+      {...txParams, from, to, gasLimit, gasPrice, value, nonce},
+      this.messenger,
+      TxStatus.INTIALIZED,
+    );
+    tx.getRLPUnsigned();
+    if (prv) {
+      const rawTransaction = RLPSign(tx, prv)[1];
+      if (cb) {
+        cb(null, rawTransaction);
+      }
+      return rawTransaction;
+    }
+  }
+  getAddress(idx?: number) {
+    if (!idx) {
+      return this.addresses[0];
+    } else {
+      return this.addresses[idx];
+    }
   }
-  get _publicKey() {
-    return this.childKey ? this.childKey.publicKey.toString('hex') : '';
+  getAddresses() {
+    return this.addresses;
   }
 }
diff --git a/packages/harmony-core/src/blockchain.ts b/packages/harmony-core/src/blockchain.ts
index 14e9b3c..1123e42 100644
--- a/packages/harmony-core/src/blockchain.ts
+++ b/packages/harmony-core/src/blockchain.ts
@@ -235,9 +235,9 @@ class Blockchain {
     return this.getRpcResult(result);
   }
 
-  async getProtocalVersion() {
+  async getProtocolVersion() {
     const result = await this.messenger.send(
-      RPCMethod.ProtocalVersion,
+      RPCMethod.ProtocolVersion,
       [],
       this.messenger.chainPrefix,
     );
diff --git a/packages/harmony-core/src/util.ts b/packages/harmony-core/src/util.ts
index 6975cee..870d37e 100644
--- a/packages/harmony-core/src/util.ts
+++ b/packages/harmony-core/src/util.ts
@@ -1,7 +1,106 @@
-import { ChainType, ChainID } from '@harmony-js/utils';
+import {ChainType, ChainID, defaultConfig} from '@harmony-js/utils';
+import {Harmony} from './harmony';
 
 export interface HarmonyConfig {
   chainUrl: string;
   chainType: ChainType;
   chainId: ChainID;
 }
+
+// tslint:disable-next-line: variable-name
+export function createWeb3(_web3: any) {
+  const url: string = _web3.currentProvider.url;
+  const harmony = new Harmony(url, {
+    chainId: defaultConfig.Default.Chain_ID,
+    chainType: defaultConfig.Default.Chain_Type,
+    chainUrl: defaultConfig.Default.Chain_URL,
+  });
+
+  _web3.setProvider(harmony.messenger.provider);
+  _web3.messenger = harmony.messenger;
+  _web3.eth.getRpcResult = harmony.blockchain.getRpcResult;
+
+  // map blockchain to eth
+  const {blockchain} = harmony;
+  _web3.eth.getBlockNumber = () => blockchain.getBlockByNumber;
+  _web3.eth.getBalance = (address: string, blockNumber?: string) =>
+    blockchain.getBalance({address, blockNumber});
+  _web3.eth.getBlockByHash = (blockHash: string, returnObject?: boolean) =>
+    blockchain.getBlockByHash({blockHash, returnObject});
+  _web3.eth.getBlockByNumber = (blockNumber: string, returnObject?: boolean) =>
+    blockchain.getBlockByNumber({blockNumber, returnObject});
+  _web3.eth.getBlockTransactionCountByHash = (blockHash: string) =>
+    blockchain.getBlockTransactionCountByHash({blockHash});
+  _web3.eth.getBlockTransactionCountByNumber = (blockNumber: string) =>
+    blockchain.getBlockTransactionCountByNumber({blockNumber});
+  _web3.eth.getTransactionByBlockHashAndIndex = (
+    blockHash: string,
+    index: string,
+  ) => blockchain.getTransactionByBlockHashAndIndex({blockHash, index});
+  _web3.eth.getTransactionByBlockNumberAndIndex = (
+    blockNumber: string,
+    index: string,
+  ) => blockchain.getTransactionByBlockNumberAndIndex({blockNumber, index});
+  _web3.eth.getTransactionByHash = (txnHash: string) =>
+    blockchain.getTransactionByHash({txnHash});
+  _web3.eth.getTransactionReceipt = (txnHash: string) =>
+    blockchain.getTransactionReceipt({txnHash});
+  _web3.eth.getCode = (address: string, blockNumber?: string) =>
+    blockchain.getCode({address, blockNumber});
+  _web3.eth.net_peerCount = () => blockchain.net_peerCount();
+  _web3.eth.net_version = () => blockchain.net_version();
+  _web3.eth.getProtocolVersion = () => blockchain.getProtocolVersion();
+  _web3.eth.getStorageAt = (
+    address: string,
+    position: string,
+    blockNumber: string | undefined,
+  ) => blockchain.getStorageAt({address, position, blockNumber});
+  _web3.eth.getTransactionCount = (
+    address: string,
+    blockNumber: string | undefined,
+  ) => blockchain.getTransactionCount({address, blockNumber});
+  _web3.eth.estimateGas = (to: string, data: string) =>
+    blockchain.estimateGas({to, data});
+  _web3.eth.gasPrice = () => blockchain.gasPrice();
+  _web3.eth.call = (payload: any, blockNumber: string | undefined) =>
+    blockchain.call({payload, blockNumber});
+  _web3.eth.newPendingTransactions = () => blockchain.newPendingTransactions();
+  _web3.eth.newBlockHeaders = () => blockchain.newBlockHeaders();
+  _web3.eth.syncing = () => blockchain.syncing();
+  _web3.eth.logs = (options: any) => blockchain.logs(options);
+
+  // map subscribe to _web3
+  _web3.eth.subscribe = harmony.messenger.subscribe;
+
+  // map accounts to _web3
+  _web3.accounts = harmony.wallet.accounts;
+  _web3.eth.accounts.create = harmony.wallet.createAccount;
+  _web3.eth.accounts.privateKeyToAccount = harmony.wallet.addByPrivateKey;
+  _web3.eth.accounts.encrypt = async (privateKey: string, password: string) => {
+    const newAcc = new harmony.Modules.Account(privateKey, harmony.messenger);
+    const result = await newAcc.toFile(password);
+    return result;
+  };
+
+  _web3.eth.accounts.decrypt = async (
+    keystoreJsonV3: any,
+    password: string,
+  ) => {
+    const newAcc = new harmony.Modules.Account();
+    const result = await newAcc.fromFile(
+      JSON.stringify(keystoreJsonV3),
+      password,
+    );
+    return result;
+  };
+
+  _web3.eth.accounts.signTransaction = harmony.wallet.signTransaction;
+
+  // map transaction to web3
+  _web3.eth.recoverTransaction = harmony.transactions.recover;
+
+  // map contract to web3
+  _web3.eth.Contract = harmony.contracts.createContract;
+
+  _web3.utils = {..._web3.utils, ...harmony.utils, ...harmony.crypto};
+}
diff --git a/packages/harmony-network/src/rpcMethod/builder.ts b/packages/harmony-network/src/rpcMethod/builder.ts
index 0d65066..14ccd31 100644
--- a/packages/harmony-network/src/rpcMethod/builder.ts
+++ b/packages/harmony-network/src/rpcMethod/builder.ts
@@ -29,7 +29,9 @@ class JsonRpc {
     params: string | undefined | any[],
   ): RPCRequestPayload<any> => {
     // FIXME: error to be done by shared/errors
-    if (!method) throw new Error('jsonrpc method should be specified!');
+    if (!method) {
+      throw new Error('jsonrpc method should be specified!');
+    }
 
     // advance message ID
     this.messageId += 1;
diff --git a/packages/harmony-network/src/rpcMethod/rpc.ts b/packages/harmony-network/src/rpcMethod/rpc.ts
index 8686329..a5fb114 100644
--- a/packages/harmony-network/src/rpcMethod/rpc.ts
+++ b/packages/harmony-network/src/rpcMethod/rpc.ts
@@ -63,7 +63,7 @@ export const enum RPCMethod {
   // 30. net_version
   NetVersion = 'net_version',
   // 31. hmy_protocolVersion
-  ProtocalVersion = 'hmy_protocolVersion',
+  ProtocolVersion = 'hmy_protocolVersion',
 }
 
 export const enum RPCErrorCode {
diff --git a/scripts/docs.ts b/scripts/docs.ts
index d2d63bc..97c5b74 100644
--- a/scripts/docs.ts
+++ b/scripts/docs.ts
@@ -5,6 +5,7 @@ import spawn from 'cross-spawn';
 
 // tslint:disable-next-line: no-var-requires
 const runner = require.resolve('./typedoc/runner');
+const batch = require.resolve('./typedoc/batch');
 const options = {stdio: 'inherit'};
 
 const outputs = process.argv.slice(2)[0].split(',');
@@ -51,7 +52,18 @@ async function docs() {
   }
 }
 
-docs();
+// docs();
+
+async function batchDocs() {
+  await preProcessFunc(preProcessProjects);
+  // const srcArry = [];
+  // for (const pkg of projects) {
+  //   srcArry.push(pkg.src);
+
+  // }
+}
+
+batchDocs();
 
 // async function docs() {
 //   await preProcessFunc(preProcessProjects);
diff --git a/scripts/typedoc/batch.js b/scripts/typedoc/batch.js
new file mode 100644
index 0000000..1161783
--- /dev/null
+++ b/scripts/typedoc/batch.js
@@ -0,0 +1,30 @@
+const path = require('path');
+// tslint:disable-next-line: no-implicit-dependencies no-var-requires
+const {Application} = require('typedoc');
+// tslint:disable-next-line: no-implicit-dependencies no-var-requires
+const arg = require('arg');
+
+const args = arg({
+  '--pkgPath': String,
+  '-p': '--pkgPath',
+  '--pkgSrc': String,
+  '-s': '--pkgSrc',
+  '--target': String,
+  '-t': '--target',
+});
+
+const pkgSrc = args['--pkgSrc'];
+const pkgPath = args['--pkgPath'];
+const target = args['--target'];
+
+const app = new Application({
+  mode: 'file',
+  tsconfig: `tsconfig.json`,
+  theme: target === 'default' ? 'default' : 'markdown',
+  plugin: path.resolve('node_modules/typedoc-plugin-markdown'),
+  platform: target,
+});
+
+const files = [...app.expandInputFiles([pkgSrc])];
+
+console.log(files);