# expand

> **expand**(`source`): [`Uint8Array`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array)

Defined in: [packages/synapse-core/src/piece/internal/fr32.ts:45](https://github.com/FilOzone/synapse-sdk/blob/a3c661408bf8b3cb47684059a425c07b9ae50a64/packages/synapse-core/src/piece/internal/fr32.ts#L45)

Apply FR32 expansion to `source`, returning expanded bytes (~1.0079× input).

## Parameters

| Parameter | Type |
| ------ | ------ |
| `source` | [`Uint8Array`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array) |

## Returns

[`Uint8Array`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array)