internal int PlaceBuyOrder(double price, double amount, int orderToCancel = -1)
{
long amountXrpDrops = (long) Math.Round(amount * Const.DROPS_IN_NATIVE);
double amountFiat = price * amount;
int feeDrops = _lastPaidActionHadLowFee ? _feeProvider.EscalatedFeeInDrops : _feeProvider.BaseFeeInDrops;
var command = new CreateBuyOrderRequest
{
tx_json = new CrOR_TxJson(_walletAddress, feeDrops)
{
TakerGets = new Take
{
currency = _fiatCurreny,
value = amountFiat.ToString("0.00000"),
issuer = _issuerAddress
},
TakerPays = amountXrpDrops.ToString()
}
};
if (-1 < orderToCancel)
{
command.tx_json.OfferSequence = orderToCancel.ToString();
}
_txSigner.Sign(command);
ErrorResponse error = null;
var delay = RETRY_DELAY;
for (int i = 1; i <= RETRY_COUNT; i++)
{
string data = sendToRippleNet(Helpers.SerializeJson(command));
if (null == data)
{
return -1;
}
error = Helpers.DeserializeJSON<ErrorResponse>(data);
if (!String.IsNullOrEmpty(error.error))
{
_logger.Error("Error creating BUY order. Mesage=" + error.error_message);
if (!error.IsCritical)
{
//The request might have been successfull even if server says there were problems
_logger.Warning("Retry in " + delay + " ms...");
delay *= 2;
Thread.Sleep(delay);
continue;
}
throw new Exception(error.error + " " + error.error_message);
}
var response = Helpers.DeserializeJSON<NewOrderResponse>(data);
if (ResponseKind.FatalError == response.result.ResponseKind) //TODO: this checking logic is to generic to be in 'PlaceBuyOrder'.
{
var message = String.Format("Error creating BUY order. Response={0} {1}", response.result.engine_result, response.result.engine_result_message);
_logger.Warning(message);
throw new Exception(message);
}
if (ResponseKind.NonCriticalError == response.result.ResponseKind)
{
_logger.Warning("Non-fatal error creating BUY order. Message=" + response.result.engine_result_message);
_logger.Warning("Retry in " + delay + " ms...");
delay *= 2;
Thread.Sleep(delay);
continue;
}
if (ResponseKind.OldSequenceNumber == response.result.ResponseKind)
{
int expectedSeqNum = GetNextSequence();
_txSigner.UpdateSequenceNumber(expectedSeqNum);
_logger.Warning(String.Format("Response: {0}. Synchronizing to suggested SeqNum {1}", response.result.engine_result_message, expectedSeqNum));
return orderToCancel;
}
if (ResponseKind.QueuedForLaterExecution == response.result.ResponseKind)
{
double feeXrp = (double)feeDrops / Const.DROPS_IN_NATIVE;
_logger.Warning("Buy order queued due to high server load: " + response.result.engine_result_message + " (Fee was " + feeXrp + " XRP)");
_lastPaidActionHadLowFee = true;
}
else
{
_lastPaidActionHadLowFee = false;
}
return response.result.tx_json.Sequence;
}
throw new Exception(String.Format("Socket request failed {0} times in a row with error '{1}'. Giving up.", RETRY_COUNT, error.error_message));
}
/// <summary>
/// Execute a market order to buy given amount of XRP. Used when XRP balance falls under reserver to get back
/// to operational state
/// </summary>
/// <param name="xrpAmount">XRP amount to buy instantly</param>
/// <returns>True for success, False in case of fail</returns>
internal bool ExchangeXrp(double xrpAmount)
{
long amountXrpDrops = (long)Math.Round(xrpAmount * Const.DROPS_IN_NATIVE);
var command = new CreateBuyOrderRequest
{
tx_json = new CrOR_TxJson(_walletAddress, _feeProvider.EscalatedFeeInDrops)
{
Flags = 262144, //tfFillOrKill
TakerGets = new Take
{
currency = _fiatCurreny,
value = "999", //No asset is so priceless to cost more that 999 XRP, right?
issuer = _issuerAddress
},
TakerPays = amountXrpDrops.ToString()
}
};
_txSigner.Sign(command);
string data = sendToRippleNet(Helpers.SerializeJson(command));
if (null == data)
{
_logger.Warning("Server returned no data as a response to market buy order");
return false;
}
var response = Helpers.DeserializeJSON<NewOrderResponse>(data);
if (ResponseKind.OldSequenceNumber == response.result.ResponseKind)
{
int expectedSeqNum = GetNextSequence();
_txSigner.UpdateSequenceNumber(expectedSeqNum);
_logger.Warning(String.Format("Response: {0}. Synchronizing to suggested SeqNum {1}", response.result.engine_result_message, expectedSeqNum));
return false;
}
if (ResponseKind.Success != response.result.ResponseKind)
{
var message = String.Format("Response for market order to buy {0:0.0000} XRP not OK. Message: {1}", xrpAmount, response.result.engine_result_message);
_logger.Warning(message);
return false;
}
return true;
}