---
editLink: false
lastUpdated: false
---

[@salesforce/b2c-tooling-sdk](../../modules.md) / [clients](../index.md) / LoggingMiddlewareConfig

# Interface: LoggingMiddlewareConfig

Defined in: [packages/b2c-tooling-sdk/src/clients/middleware.ts:393](https://github.com/SalesforceCommerceCloud/b2c-developer-tooling/blob/e7c16f1ae423da0aa47b3e10be88f9770b53619b/packages/b2c-tooling-sdk/src/clients/middleware.ts#L393)

Configuration for logging middleware.

## Properties

### maskBodyKeys?

> `optional` **maskBodyKeys**: `string`[]

Defined in: [packages/b2c-tooling-sdk/src/clients/middleware.ts:404](https://github.com/SalesforceCommerceCloud/b2c-developer-tooling/blob/e7c16f1ae423da0aa47b3e10be88f9770b53619b/packages/b2c-tooling-sdk/src/clients/middleware.ts#L404)

Body keys to mask in logs (replaced with '...' placeholder).
Useful for large payloads like base64-encoded file data.

#### Example

```ts
['data', 'password', 'secret']
```

***

### prefix?

> `optional` **prefix**: `string`

Defined in: [packages/b2c-tooling-sdk/src/clients/middleware.ts:397](https://github.com/SalesforceCommerceCloud/b2c-developer-tooling/blob/e7c16f1ae423da0aa47b3e10be88f9770b53619b/packages/b2c-tooling-sdk/src/clients/middleware.ts#L397)

Prefix for log messages (e.g., 'OCAPI', 'SLAS', 'MRT').