> ## Documentation Index
> Fetch the complete documentation index at: https://ship-jskiller1404-add-ommiting-private-fields-feature.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Transactions

> Transactions API reference

### `withTransaction`

```typescript theme={null}
withTransaction: <TRes = any>(
  transactionFn: (session: ClientSession) => Promise<TRes>,
): Promise<TRes>
```

Runs callbacks and automatically commits or rollbacks transaction.

```typescript theme={null}
import db from 'db';

const { user, company } = await db.withTransaction(async (session) => {
  const createdUser = await usersService.insertOne({ fullName: 'Bahrimchuk' }, {}, { session });
  const createdCompany = await companyService.insertOne(
    { users: [createdUser._id] }, {},
    { session },
  );

  return { user: createdUser, company: createdCompany };
});
```

**Parameters**

* transactionFn: `(session: ClientSession) => Promise<TRes>`;\
  Function that accepts a client session and manages some business logic. Must return a `Promise`.

**Returns** `Promise<TRes>`.