Handle declined transactions in EventHandler:

- Add logic to identify and process declined transactions for `CreateTransaction

services/EventHandler.cpp

@@ -279,6 +279,37 @@ void EventHandler::updateEventThread(const QString &key, const EventInfo &event,
             GeneralLogDAO::insert("CRITICAL", "EventHandler", logMsg, screenshot);
 
             sendTaskError(eventTypeToString(event.type), event.externalId, event.bankName, result, screenshot, event.id);
+
+            if (event.type == EventType::CreateTransaction) {
+                const MaterialInfo declAcc = MaterialDAO::getAccountById(event.accountId);
+                const QMap<QString, int> declCurrencyCodes = {
+                    {"RUB", 643}, {"USD", 840}, {"KRW", 410}, {"AZN", 944}, {"ARS", 32}, {"TJS", 972}
+                };
+                const int declCurrencyCode = declCurrencyCodes.value(declAcc.currency.toUpper(), 643);
+                const QString declTxType = QJsonDocument::fromJson(event.json.toUtf8())
+                    .object()["body"].toObject()["type"].toString();
+
+                QString declTxId;
+                const QList<TransactionInfo> declTxList = TransactionDAO::getTransactionsWithinHours(event.accountId, 1);
+                for (const auto &tx : declTxList) {
+                    if (!tx.bankTrExternalId.isEmpty() && qAbs(tx.amount) == event.amount && tx.phone == event.phone) {
+                        declTxId = tx.bankTrExternalId;
+                        break;
+                    }
+                }
+
+                QJsonObject declined;
+                declined["bank_transaction_id"]  = declTxId;
+                declined["amount"]               = -static_cast<int>(event.amount * 100);
+                declined["currency"]             = declCurrencyCode;
+                declined["transaction_type"]     = declTxType.isEmpty() ? QStringLiteral("top-up") : declTxType;
+                declined["bank_participator_id"] = event.phone;
+                declined["status"]               = QStringLiteral("declined");
+                declined["extra"]                = QJsonObject();
+                declined["created_at"]           = QDateTime::currentDateTimeUtc().toString(Qt::ISODate);
+                sendTaskResult(QStringLiteral("CREATE_TRANSACTION"), event.externalId, event.bankName, declined, -1);
+            }
+
             EventDAO::markSentToServer(event.id);
         }