private async Task TransferRequestMessageReceivedAsync(SessionMessageEvent <TransferRequestMessage> evt)
{
var transaction = await _transactionsRepository.GetBySessionIdAsync(evt.SessionId);
if (transaction == null || transaction.Status != TransactionStatus.SessionConfirmed)
{
return; //todo: handle this case.
}
transaction.Status = TransactionStatus.TransferRequested;
_transactionDataService.FillTransactionData(transaction, evt.Message);
await _transactionsRepository.UpdateAsync(transaction);
}