# transformStream

> **transformStream**(): [`PieceCIDTransform`](/reference/filoz/synapse-core/piece/interfaces/piececidtransform/)

Defined in: [packages/synapse-core/src/piece/calculate.ts:98](https://github.com/FilOzone/synapse-sdk/blob/a6b66bd7c371551b71e39395baa348563e1cc318/packages/synapse-core/src/piece/calculate.ts#L98)

## Returns

[`PieceCIDTransform`](/reference/filoz/synapse-core/piece/interfaces/piececidtransform/)