public bool FiatWithdrawToCustomer(ApplicationUser brokerUser, BrokerOrder order)
{
var asset = order.AssetReceive;
var amount = order.AmountReceive;
var wallet = _walletProvider.GetFiat(asset);
if (wallet == null)
{
_logger.LogError($"No fiat wallet for {asset}");
return(false);
}
var via = new ViaJsonRpc(_settings.AccessHttpUrl);
var balance = via.BalanceQuery(brokerUser.Exchange.Id, asset);
// validate amount
var amountInt = wallet.AmountToLong(amount);
var availableInt = wallet.StringToAmount(balance.Available);
if (amountInt > availableInt)
{
_logger.LogError("broker available balance is too small");
return(false);
}
if (amountInt <= 0)
{
_logger.LogError("amount must be greather then or equal to 0");
return(false);
}
using (var dbtx = wallet.BeginDbTransaction())
{
// register withdrawal with wallet
var acct = new BankAccount {
AccountNumber = order.Recipient
};
var tx = wallet.RegisterPendingWithdrawal(brokerUser.Id, amountInt, acct);
if (tx == null)
{
_logger.LogError($"Failed to create fiat withdrawal ('{order.Token}')");
return(false);
}
wallet.Save();
var businessId = tx.Id;
try
{
// link pending withdrawal to broker order
var bow = new BrokerOrderFiatWithdrawal {
BrokerOrderId = order.Id, DepositCode = tx.DepositCode
};
_context.BrokerOrderFiatWithdrawals.Add(bow);
// we save changes here so that we a broker order cannot be processed twice(BrokerOrderChainWithdrawal.BrokerOrderId is unique)
_context.SaveChanges();
}
catch
{
_logger.LogError($"unable to create BrokerOrderChainWithdrawal object ({order.Id}, {tx.DepositCode}");
throw;
}
// register withdrawal with the exchange backend
var negativeAmount = -amount;
try
{
via.BalanceUpdateQuery(brokerUser.Exchange.Id, asset, "withdraw", businessId, negativeAmount.ToString(), null);
}
catch (ViaJsonException ex)
{
_logger.LogError(ex, "Failed to update (withdraw) user balance (xch id: {0}, asset: {1}, businessId: {2}, amount {3}",
brokerUser.Exchange.Id, asset, businessId, negativeAmount);
if (ex.Err == ViaError.BALANCE_UPDATE__BALANCE_NOT_ENOUGH)
{
dbtx.Rollback();
_logger.LogError("balance not enough");
return(false);
}
throw;
}
dbtx.Commit();
}
return(true);
}
