private byte[] Encryption(byte[] data, string aesKey)
{
var discarded = 0;
byte[] iv = new byte[16];
SecureRandom random = new SecureRandom();
random.NextBytes(iv);
var key = HexEncoding.GetBytes(aesKey, out discarded);
return(HexEncoding.GetBytes(BitConverter.ToString(iv) + BitConverter.ToString(EncryptAES(iv, key, data)), out discarded));
}
public void UpdateBalanceTask()
{
CancellationTokenSource cts = this.cancellation;
Device.StartTimer(TimeSpan.FromSeconds(30), () =>
{
if (cts.IsCancellationRequested)
{
return(false);
}
if (BleDevice == null)
{
return(true);
}
if (BleDevice.Status != ConnectionStatus.Connected)
{
//Interlocked.Exchange(ref this.cancellation, new CancellationTokenSource()).Cancel();
UserDialogs.Instance.Toast("Can't find the badge near you..");
Task.Run(async() =>
{
await Reconnect();
});
return(true);
}
Task.Run(async() =>
{
var badgeSetting = App.Database.BadgeDAO.GetItemsAsync().Result.Last();
var aesKey = badgeSetting.AESKey;
var discard = 0;
var hexOfContractBalance = BitConverter.ToString(BitConverter.GetBytes((double)(await EthService.Instance.GetTokenBalance("0x" + badgeSetting.Address, EthService.Instance.HitConCoinContract)) / 1000000000000000000)).Replace("-", string.Empty);
var hexOfEthBalance = BitConverter.ToString(BitConverter.GetBytes((double)(await EthService.Instance.GetBalance("0x" + badgeSetting.Address)) / 1000000000000000000)).Replace("-", string.Empty);
//var contractAddress = EthService.Instance.HitConCoinContract.Remove(0, 2);//string.Format("{0:X2}", balance.ToString("X2").Length / 2) + balance.ToString("X2")
var contractAddress = EthService.Instance.HitConCoinContract.Remove(0, 2);
var plainData = HexEncoding.GetBytes("01" + string.Format("{0:X2}", contractAddress.Length / 2) + contractAddress +
"02" + "08" + hexOfContractBalance +
"01" + string.Format("{0:X2}", badgeSetting.Address.Length / 2) + badgeSetting.Address +
"02" + "08" + hexOfEthBalance, out discard);
byte[] encrypteddata = Encryption(plainData, aesKey);
await Badge.Instance.DoWrite(Badge.Instance.CharacteristicUpdateBalance, true, encrypteddata);
});
return(true);
});
}
