bool ChainWithdrawToCustomer(ApplicationUser brokerUser, BrokerOrder order)
{
var asset = order.AssetReceive;
var amount = order.AmountReceive;
var wallet = _walletProvider.GetChain(asset);
if (wallet == null)
{
_logger.LogError($"No chain wallet for {asset}");
return(false);
}
var brokerWalletTag = wallet.GetTag(brokerUser.Id);
if (brokerWalletTag == null)
{
_logger.LogError($"No tag for broker {brokerUser.Id}");
return(false);
}
var via = new ViaJsonRpc(_settings.AccessHttpUrl);
var balance = via.BalanceQuery(brokerUser.Exchange.Id, asset);
// validate amount
var amountInt = wallet.StringToAmount(amount.ToString());
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);
}
var consolidatedFundsTag = _walletProvider.ConsolidatedFundsTag();
using (var dbtx = wallet.BeginDbTransaction())
{
// ensure tag exists
if (!wallet.HasTag(consolidatedFundsTag))
{
wallet.NewTag(consolidatedFundsTag);
wallet.Save();
}
// register withdrawal with wallet
var tag = wallet.GetTag(brokerUser.Id);
if (tag == null)
{
tag = wallet.NewTag(brokerUser.Id);
}
var spend = wallet.RegisterPendingSpend(consolidatedFundsTag, consolidatedFundsTag,
order.Recipient, amountInt, tag);
wallet.Save();
var businessId = spend.Id;
try
{
// link pending withdrawal to broker order
var bow = new BrokerOrderChainWithdrawal {
BrokerOrderId = order.Id, SpendCode = spend.SpendCode
};
_context.BrokerOrderChainWithdrawals.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}, {spend.SpendCode}");
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);
}
