class YkneoBitcoinSoft implements YkneoBitcoin {

    @Override
    public byte[] getHeader() throws PinModeLockedException, IOException, NoKeyLoadedException {
        ensurePin(PinMode.USER);
        ensureKey();
        byte[] header = new byte[13];
        System.arraycopy(master.getRootKey().serializePrivate(), 0, header, 0, 13);
        return header;
    }

    public  YkneoBitcoinSoft();

}