diff --git a/patches/web3-eth-accounts+1.7.4.patch b/patches/web3-eth-accounts+1.7.4.patch
index ae1befd..6aa68a7 100644
--- a/patches/web3-eth-accounts+1.7.4.patch
+++ b/patches/web3-eth-accounts+1.7.4.patch
@@ -1,5 +1,5 @@
 diff --git a/node_modules/web3-eth-accounts/lib/index.js b/node_modules/web3-eth-accounts/lib/index.js
-index a176dd9..27064fc 100644
+index a176dd9..de56ed8 100644
 --- a/node_modules/web3-eth-accounts/lib/index.js
 +++ b/node_modules/web3-eth-accounts/lib/index.js
 @@ -23,7 +23,7 @@
@@ -11,7 +11,40 @@ index a176dd9..27064fc 100644
  var scrypt = require('scrypt-js');
  var uuid = require('uuid');
  var utils = require('web3-utils');
-@@ -621,6 +621,9 @@ if (!storageAvailable('localStorage')) {
+@@ -420,7 +420,14 @@ Accounts.prototype.decrypt = function (v3Keystore, password, nonStrict) {
+     if (json.crypto.kdf === 'scrypt') {
+         kdfparams = json.crypto.kdfparams;
+         // FIXME: support progress reporting callback
+-        derivedKey = scrypt.syncScrypt(Buffer.from(password), Buffer.from(kdfparams.salt, 'hex'), kdfparams.n, kdfparams.r, kdfparams.p, kdfparams.dklen);
++        var start = Date.now();
++
++        if (window.jsb && window.jsb.jcCryptoScrypt) {
++            derivedKey = jsb.jcCryptoScrypt(password, kdfparams.salt, kdfparams.n, kdfparams.r, kdfparams.p, kdfparams.dklen);
++        } else {
++            derivedKey = scrypt.syncScrypt(Buffer.from(password), Buffer.from(kdfparams.salt, 'hex'), kdfparams.n, kdfparams.r, kdfparams.p, kdfparams.dklen);
++        }
++        console.log('scrypt encrypt cost time: ' + (Date.now() - start)/1000);
+     }
+     else if (json.crypto.kdf === 'pbkdf2') {
+         kdfparams = json.crypto.kdfparams;
+@@ -463,7 +470,15 @@ Accounts.prototype.encrypt = function (privateKey, password, options) {
+         kdfparams.n = options.n || 8192; // 2048 4096 8192 16384
+         kdfparams.r = options.r || 8;
+         kdfparams.p = options.p || 1;
+-        derivedKey = scrypt.syncScrypt(Buffer.from(password), Buffer.from(kdfparams.salt, 'hex'), kdfparams.n, kdfparams.r, kdfparams.p, kdfparams.dklen);
++        var start = Date.now();
++
++        if (window.jsb && window.jsb.jcCryptoScrypt) {
++            derivedKey = jsb.jcCryptoScrypt(password, kdfparams.salt, kdfparams.n, kdfparams.r, kdfparams.p, kdfparams.dklen);
++        } else {
++            derivedKey = scrypt.syncScrypt(Buffer.from(password), Buffer.from(kdfparams.salt, 'hex'), kdfparams.n, kdfparams.r, kdfparams.p, kdfparams.dklen);
++        }
++        
++        console.log('scrypt encrypt cost time: ' + (Date.now() - start)/1000);
+     }
+     else {
+         throw new Error('Unsupported kdf');
+@@ -621,6 +636,9 @@ if (!storageAvailable('localStorage')) {
   */
  function storageAvailable(type) {
      var storage;
diff --git a/src/index.ts b/src/index.ts
index b7a8954..b5e7bae 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -12,6 +12,7 @@ import { loadData, saveData } from "./manage/DataManage";
 import { WALLET_STORAGE_KEY_NAME } from "./config/constants";
 import { DEFALUT_TOKENS } from "./config/chain_config";
 import { newAccount, newMnemonic, restoreWalletByMnemonic } from "./manage/WalletManage";
+import { signLogin } from "./util/sign.util";
 
 
 var global =
@@ -59,11 +60,17 @@ export default class JCWallet {
 
   constructor() {
     // this.web3 = new Web3('https://rpc-mainnet.kcc.network')
+    var start = Date.now();
     this.web3 = new Web3('https://rpc-testnet.kcc.network')
+    console.log(`init web3 cost: ${(Date.now() - start)/ 1000}`)
     this.erc20Standard = new ERC20Standard(this.web3);
     this.erc721Standard = new ERC721Standard(this.web3);
+    start = Date.now();
     this.wallet = this.web3.eth.accounts.wallet.load(this.password, WALLET_STORAGE_KEY_NAME)
+    console.log(`load wallet cost: ${(Date.now() - start)/ 1000}`)
+    start = Date.now()
     this.data = loadData()
+    console.log(`init wallet ext data cost: ${(Date.now() - start)/ 1000}`)
     
     window.jc = { wallet: this };
     window.cc = window.cc || {};
@@ -195,6 +202,7 @@ export default class JCWallet {
     
     this.accountIndex = this.wallet.length - 1
     this.mainHandlers.emit(WALLET_ACCOUNT_CHANGE, account.address)
+    return account.address
   }
 
   public importAccount(privateKey: string) {
@@ -217,7 +225,7 @@ export default class JCWallet {
     this.web3.eth.accounts.wallet.save(this.password, WALLET_STORAGE_KEY_NAME);
     this.accountIndex = this.wallet.length - 1
     this.mainHandlers.emit(WALLET_ACCOUNT_CHANGE, account.address)
-    return true
+    return account.address
   }
 
   private getMaxIdexOfType(type: number) {
@@ -275,6 +283,12 @@ export default class JCWallet {
     })
   }
 
+  public loginSign(nonce: string, tips: string) {
+    const account = this.currentAccount();
+    return signLogin(nonce, tips, account.privateKey)
+  }
+
+
   public recoverTypedSignatureV4(signObj: any, signature: string) {
     return recoverTypedSignature({
       data: signObj,
diff --git a/src/util/sign.util.ts b/src/util/sign.util.ts
new file mode 100644
index 0000000..e9b3b68
--- /dev/null
+++ b/src/util/sign.util.ts
@@ -0,0 +1,34 @@
+import { signTypedData, SignTypedDataVersion, TypedMessage } from "@metamask/eth-sig-util"
+
+
+export function signLogin(nonce: string, tips: string, privateKey: string) {
+  const signMsg = {
+    tips,
+    nonce,
+  }
+  const signObj = {
+    types: {
+        EIP712Domain: [
+          { name: 'name', type: 'string' },
+          { name: 'version', type: 'string' }
+        ],
+        set: [
+          { name: 'tips', type: 'string' },
+          { name: 'nonce', type: 'string' }
+        ]
+    },
+    primaryType: "set",
+    domain: {
+        name: 'Auth',
+        version: '1'
+    },
+    message: signMsg
+  }
+  
+  return signTypedData({
+    //@ts-ignore
+    data: signObj,
+    privateKey: Buffer.from(privateKey.replace('0x', ''), 'hex'),
+    version: SignTypedDataVersion.V4
+  })
+}