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

# Interface: LoggingMiddlewareConfig

Defined in: [packages/b2c-tooling-sdk/src/clients/middleware.ts:400](https://github.com/SalesforceCommerceCloud/b2c-developer-tooling/blob/67fb8580ac3c5b372617ee3ec3fc8f2bc9f16174/packages/b2c-tooling-sdk/src/clients/middleware.ts#L400)

Configuration for logging middleware.

## Properties

### maskBodyKeys?

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

Defined in: [packages/b2c-tooling-sdk/src/clients/middleware.ts:411](https://github.com/SalesforceCommerceCloud/b2c-developer-tooling/blob/67fb8580ac3c5b372617ee3ec3fc8f2bc9f16174/packages/b2c-tooling-sdk/src/clients/middleware.ts#L411)

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:404](https://github.com/SalesforceCommerceCloud/b2c-developer-tooling/blob/67fb8580ac3c5b372617ee3ec3fc8f2bc9f16174/packages/b2c-tooling-sdk/src/clients/middleware.ts#L404)

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