diff --git a/patches/web3-eth-accounts+1.7.4.patch b/patches/web3-eth-accounts+1.7.4.patch
index 1fdb2e7..771e15b 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..1a26ff6 100644
+index a176dd9..4c05e61 100644
 --- a/node_modules/web3-eth-accounts/lib/index.js
 +++ b/node_modules/web3-eth-accounts/lib/index.js
 @@ -23,7 +23,7 @@
@@ -11,33 +11,60 @@ index a176dd9..1a26ff6 100644
  var scrypt = require('scrypt-js');
  var uuid = require('uuid');
  var utils = require('web3-utils');
-@@ -420,7 +420,11 @@ Accounts.prototype.decrypt = function (v3Keystore, password, nonStrict) {
+@@ -38,6 +38,18 @@ var isNot = function (value) {
+ var isExist = function (value) {
+     return (typeof value !== 'undefined') && value !== null;
+ };
++
++var base64ToUint8Buffer = function(base64) {
++    var binary_string = window.atob(base64);
++    var len = binary_string.length;
++    var bytes = new Uint8Array(len);
++    for (var i = 0; i < len; i++) {
++        bytes[i] = binary_string.charCodeAt(i);
++    }
++    return bytes;
++}
++
++
+ var Accounts = function Accounts() {
+     var _this = this;
+     // sets _requestmanager
+@@ -420,7 +432,15 @@ 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);
++            let tmpKey = jsb.jcCryptoScrypt(password, kdfparams.salt, kdfparams.n, kdfparams.r, kdfparams.p, kdfparams.dklen);
++            derivedKey = base64ToUint8Buffer(tmpKey);
 +        } else {
 +            derivedKey = scrypt.syncScrypt(Buffer.from(password), Buffer.from(kdfparams.salt, 'hex'), kdfparams.n, kdfparams.r, kdfparams.p, kdfparams.dklen);
 +        }
++        console.log('decrypt key: ' + derivedKey);
++        console.log('scrypt generate key cost time: ' + (Date.now() - start)/1000);
      }
      else if (json.crypto.kdf === 'pbkdf2') {
          kdfparams = json.crypto.kdfparams;
-@@ -463,7 +467,11 @@ Accounts.prototype.encrypt = function (privateKey, password, options) {
+@@ -463,7 +483,15 @@ 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);
++            let tmpKey = jsb.jcCryptoScrypt(password, kdfparams.salt, kdfparams.n, kdfparams.r, kdfparams.p, kdfparams.dklen);
++            derivedKey = base64ToUint8Buffer(tmpKey);
 +        } else {
 +            derivedKey = scrypt.syncScrypt(Buffer.from(password), Buffer.from(kdfparams.salt, 'hex'), kdfparams.n, kdfparams.r, kdfparams.p, kdfparams.dklen);
 +        }
++        console.log('scrypt generate key cost time: ' + (Date.now() - start)/1000);
      }
      else {
          throw new Error('Unsupported kdf');
-@@ -621,6 +629,9 @@ if (!storageAvailable('localStorage')) {
+@@ -621,6 +649,9 @@ if (!storageAvailable('localStorage')) {
   */
  function storageAvailable(type) {
      var storage;