Tokennet Wallet For Android

BOSCoin Tokennet wallet for Android by BlockchainOS, Inc

This wallet is designed to enhance security to solve the problem of users losing or taken over their Secret Seed. The wallet will introduce the Recovery Key instead of Seed Seed. The Recovery Key is stored in the wallet and can only be decrypted with Password which you set at the creation time. As you expected, the Password will not be stored in your device.

Status

The current version has been implemented with 'Android Basic UI'. Using current version you can use the following basic features.

• Sending transaction
• Creating wallet
• Importing wallet(with Recovery Key)
• Ordiring wallet list(temporary)
• Receive

Compatibility

• Minimum Android SDK: API level of 21
• Compile Android SDK: API 26 or later

Secret seed Key

secret seed key is used to produce from KeyPair.random() method. Referjava-stellar-sdk This secret secret key is encoded to make it easier to read and transfer, hence, it is some what vulnerable to security. To resolve this problem, BOScoin Tokennet Wallet made recovery key to enhance security.

Recovery Key

Recovery key is structured like so:

'BOS' + encoded secret key + Platform + Database version

Where,

• BOS prefix for identification recovery key is created from BOScoin Tokennet Wallet.
• Encoded secret key is created from secret seed key and password entered by user.
• Identifier for Platform indicates from which platform it was created.(In order to cope with cross platform problem.)
• Identifier for Android Database version indicates using when upgrading the database.

#How it Works How secrete seed key is actually encrypted by using BOScoin Tokennet Wallet.

Encrypt like below so: (refer crypt/AESCrypt.java)

String password = "input user passward";
String sskey = "secret seed key";	
try {
      AESCrypt.encrypt(password, sskey);
} catch (GeneralSecurityException e) {
     //hadle error

}

Decrypt like below so: (refer crypt/AESCrypt.java)

String password = "password";
String bkey = "BOSu86XBHDvnur.....h11PA1";
//prease remove remove prefix(BOS) and subfix(A1). then 
String enckey = "u86XBHDvnur.....h11P";

 try {
       String dec =  AESCrypt.decrypt(password,enckey);
       keyPair = KeyPair.fromSecretSeed(dec);
       mSeed = new String(keyPair.getSecretSeed());
} catch (GeneralSecurityException e) {
     //hadle error
}

Development and Build

To build properly, java-stellar-sdk is required. It was modified for BOScoins Tokennet. Please Download it, and then build,

$ git clone https://github.com/bosnet/java-stellar-sdk.git
$ cd java-stellar-sdk
$ ./gradlew build

After building 'java-stellar-sdk' for BOSCoin tokennet, import '.jar' file to the project. Android Studio cleanly imports both 'tokennet-wallet-android' source and '.jar'.

To open in Android Studio:

1. Go to "File" menu or the "Welcome Screen"
2. Click "Open"
3. Navigate to 'tokennet-wallet-android' root directory.

Note: Make sure your 'Android SDK' has the 'Android Support Repository' installed, and that your $ANDROID_HOME environment variable is pointing at the SDK or add a local.properties file in the root project with a sdk.dir=... line.