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# Interface: UnderlyingByteSource

[internal](../modules/internal-8.md).UnderlyingByteSource

## Properties

### autoAllocateChunkSize

• `Optional` **autoAllocateChunkSize**: `number`

#### Defined in

packages/medusa-js/node_modules/@types/node/stream/web.d.ts:112

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### cancel

• `Optional` **cancel**: [`ReadableStreamErrorCallback`](internal-8.ReadableStreamErrorCallback.md)

#### Defined in

packages/medusa-js/node_modules/@types/node/stream/web.d.ts:113

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### pull

• `Optional` **pull**: [`ReadableByteStreamControllerCallback`](internal-8.ReadableByteStreamControllerCallback.md)

#### Defined in

packages/medusa-js/node_modules/@types/node/stream/web.d.ts:114

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### start

• `Optional` **start**: [`ReadableByteStreamControllerCallback`](internal-8.ReadableByteStreamControllerCallback.md)

#### Defined in

packages/medusa-js/node_modules/@types/node/stream/web.d.ts:115

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### type

• **type**: ``"bytes"``

#### Defined in

packages/medusa-js/node_modules/@types/node/stream/web.d.ts:116