private async Task <bool> ValidateAccount(IMarginTradingAccount account, AccountChangedEvent e)
{
if (account == null)
{
await _log.WriteWarningAsync(nameof(AccountsProjection), e.ToJson(),
$"Account with id {e.Account.Id} was not found");
return(false);
}
return(true);
}
private void HandleSwap(AccountChangedEvent e)
{
if (_ordersCache.Positions.TryGetPositionById(e.BalanceChange.EventSourceId, out var position))
{
position.SetSwapTotal(position.SwapTotal + e.BalanceChange.ChangeAmount);
}
else
{
_log.WriteWarning("AccountChangedEvent Handler", e.ToJson(),
$"Position [{e.BalanceChange.EventSourceId} was not found]");
}
}
private void HandleUnrealizedPnLTransaction(AccountChangedEvent e)
{
if (_ordersCache.Positions.TryGetPositionById(e.BalanceChange.EventSourceId,
out var position))
{
UnrealizedPnlMetadataContract metadata = null;
if (!string.IsNullOrWhiteSpace(e.BalanceChange.AuditLog))
{
try
{
metadata = e.BalanceChange.AuditLog
.DeserializeJson <UnrealizedPnlMetadataContract>();
}
catch
{
_log.WriteWarning("AccountChangedEvent Handler", e.ToJson(),
$"Metadata for {AccountBalanceChangeReasonTypeContract.UnrealizedDailyPnL} not found");
}
}
//let's keep it for backward compatibility and for unexpected errors
if (metadata == null || metadata.RawTotalPnl == default)
{
position.ChargePnL(e.BalanceChange.Id, e.BalanceChange.ChangeAmount);
}
else
{
position.SetChargedPnL(e.BalanceChange.Id, metadata.RawTotalPnl);
}
}
else
{
_log.WriteWarning("AccountChangedEvent Handler", e.ToJson(),
$"Position [{e.BalanceChange.EventSourceId} was not found]");
}
}
public async Task Handle(AccountChangedEvent e)
{
var accountId = e?.Account?.Id;
if (string.IsNullOrEmpty(accountId))
{
await _log.WriteWarningAsync(
nameof(AccountChangedProjection),
nameof(Handle),
e.ToJson(),
"Account id is empty");
}
else
{
await _accountManagementService.ClearStatsCache(accountId);
}
}
public async Task Handle(AccountChangedEvent e)
{
var executionInfo = await _operationExecutionInfoRepository.GetOrAddAsync(
operationName : OperationName,
operationId : e.OperationId,
factory : () => new OperationExecutionInfo <OperationData>(
operationName: OperationName,
id: e.OperationId,
lastModified: _dateService.Now(),
data: new OperationData {
State = OperationState.Initiated
}
));
if (executionInfo.Data.SwitchState(OperationState.Initiated, OperationState.Finished))
{
var updatedAccount = Convert(e.Account);
switch (e.EventType)
{
case AccountChangedEventTypeContract.Created:
_accountsCacheService.TryAddNew(MarginTradingAccount.Create(updatedAccount));
break;
case AccountChangedEventTypeContract.Updated:
{
var account = _accountsCacheService.TryGet(e.Account.Id);
if (await ValidateAccount(account, e) &&
await _accountsCacheService.UpdateAccountChanges(updatedAccount.Id,
updatedAccount.TradingConditionId, updatedAccount.WithdrawTransferLimit,
updatedAccount.IsDisabled, updatedAccount.IsWithdrawalDisabled, e.ChangeTimestamp))
{
_accountUpdateService.RemoveLiquidationStateIfNeeded(e.Account.Id,
"Trading conditions changed");
}
break;
}
case AccountChangedEventTypeContract.BalanceUpdated:
{
if (e.BalanceChange != null)
{
var account = _accountsCacheService.TryGet(e.Account.Id);
if (await ValidateAccount(account, e))
{
switch (e.BalanceChange.ReasonType)
{
case AccountBalanceChangeReasonTypeContract.Withdraw:
await _accountUpdateService.UnfreezeWithdrawalMargin(updatedAccount.Id,
e.BalanceChange.Id);
break;
case AccountBalanceChangeReasonTypeContract.UnrealizedDailyPnL:
if (_ordersCache.Positions.TryGetPositionById(e.BalanceChange.EventSourceId,
out var position))
{
position.ChargePnL(e.BalanceChange.Id, e.BalanceChange.ChangeAmount);
}
else
{
_log.WriteWarning("AccountChangedEvent Handler", e.ToJson(),
$"Position [{e.BalanceChange.EventSourceId} was not found]");
}
break;
case AccountBalanceChangeReasonTypeContract.RealizedPnL:
await _accountUpdateService.UnfreezeUnconfirmedMargin(e.Account.Id,
e.BalanceChange.EventSourceId);
break;
}
if (await _accountsCacheService.UpdateAccountBalance(updatedAccount.Id,
e.BalanceChange.Balance, e.ChangeTimestamp))
{
_accountUpdateService.RemoveLiquidationStateIfNeeded(e.Account.Id,
"Balance updated");
_accountBalanceChangedEventChannel.SendEvent(this,
new AccountBalanceChangedEventArgs(updatedAccount));
}
}
}
else
{
_log.WriteWarning("AccountChangedEvent Handler", e.ToJson(), "BalanceChange info is empty");
}
break;
}
case AccountChangedEventTypeContract.Deleted:
//account deletion from cache is double-handled by CQRS flow
_accountsCacheService.Remove(e.Account.Id);
break;
default:
await _log.WriteErrorAsync(nameof(AccountsProjection), nameof(AccountChangedEvent),
e.ToJson(), new Exception("AccountChangedEventTypeContract was in incorrect state"));
break;
}
_chaosKitty.Meow(e.OperationId);
await _operationExecutionInfoRepository.Save(executionInfo);
}
}