Added summonBrainWallet function.

index.js

@@ -1,6 +1,7 @@
 'use strict';
 
 var rlp = require('rlp');
+var scrypt = require('scrypt-js');
 
 var Contract = require('./lib/contract.js');
 var secretStorage = require('./lib/secret-storage.js');
@@ -32,6 +33,8 @@ utils.defineProperty(exportUtils, 'getContractAddress', function(transaction) {
 module.exports = Wallet;
 
 
+utils.defineProperty(Wallet, 'etherSymbol', '\uD835\uDF63');
+
 utils.defineProperty(Wallet, 'getAddress', SigningKey.getAddress);
 utils.defineProperty(Wallet, 'getIcapAddress', SigningKey.getIcapAddress);
 
@@ -63,6 +66,20 @@ utils.defineProperty(Wallet.prototype, 'encrypt', function(password, options, ca
     secretStorage.encrypt(this.privateKey, password, options, callback);
 });
 
+utils.defineProperty(Wallet, 'summonBrainWallet', function(username, password, callback) {
+    if (typeof(callback) !== 'function') { throw new Error('invalid callback'); }
+
+    scrypt(password, username, (1 << 18), 8, 1, 32, function(error, progress, key) {
+        if (key) {
+        console.log(key, new Buffer(key), (new Buffer(key)).toString('hex'));
+            return callback(error, new Wallet(new Buffer(key)), 1);
+        } else {
+            return callback(error, null, progress);
+        }
+    });
+});
+
+
 utils.defineProperty(Wallet, 'randomish', new Randomish());
 
 module.exports = Wallet;