# Functions

<a id="buffertou8a"></a>

##  bufferToU8a

▸ **bufferToU8a**(buffer?: *`Buffer` \| `number`[] \| `null`*): `Uint8Array`

*Defined in [buffer/toU8a.ts:19](https://github.com/polkadot-js/common/blob/4b1681d/packages/util/src/buffer/toU8a.ts#L19)*

*__name__*: bufferToU8a

*__summary__*: Creates a Uint8Array value from a Buffer object.

*__description__*: `null` inputs returns an empty result, `Buffer` values return the actual value as a `Uint8Array`. Anything that is not a `Buffer` object throws an error.

*__example__*:   

```javascript
import { bufferToU8a } from '@polkadot/util';

bufferToU8a(Buffer.from([1, 2, 3]));
```

**Parameters:**

| Name | Type |
| ------ | ------ |
| `Optional` buffer | `Buffer` \| `number`[] \| `null` |

**Returns:** `Uint8Array`

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