Overcharging with use DB transaction Controller action

BillingTransactionController.php

<?php

namespace backend\modules\manager\controllers;

use backend\modules\manager\Controller;
use common\core\Core;
use common\models\billing\Account;
use common\models\billing\Transaction;
use common\models\billing\TransactionSearch;
use Yii;
use yii\db\Exception;
use yii\helpers\Url;

/**
 * BillingTransactionController implements the CRUD actions for BillingTransaction model.
 */
class BillingTransactionController extends Controller
{
    /**
     * @return string|\yii\web\Response
     * @throws Exception
     * @throws \Exception
     */
    public function actionOvercharging()
    {
        $model = new Transaction(['scenario' => 'overcharging']);
        if ($model->load(Yii::$app->request->post())) {
            $fromAccount = Account::findOne(['userId' => Core::getRoot()->id, 'currencyId' => $model->currencyId]);
            $toAccount = Account::findOne([
                'projectId' => Yii::$app->request->get('id'),
                'currencyId' => $model->currencyId
            ]);
            $dbTransaction = \Yii::$app->db->beginTransaction();
            try {
                $fromAccount->transfer($toAccount, $model->amount, $model->type, $model->description);
                Yii::$app->session->setFlash('success', Yii::t('app', 'Overcharging is success!'));
                $dbTransaction->commit();
            } catch (Exception $e) {
                $dbTransaction->rollBack();
                Yii::$app->session->setFlash('success', Yii::t('app', 'Overcharging error!'));
                throw $e;
            }
            return $this->redirect(Url::previous());
        } else {
            return $this->render('create', [
                'model' => $model,
                'types' => Transaction::getProjectDebit(),
            ]);
        }
    }
}