# CommitOptions

Defined in: [packages/synapse-sdk/src/types.ts:626](https://github.com/FilOzone/synapse-sdk/blob/0c729dad461472f017e4d84f8e6ac16e6afbe7c0/packages/synapse-sdk/src/types.ts#L626)

Options for committing pieces on-chain

## Properties

### extraData?

> `optional` **extraData?**: `` `0x${string}` ``

Defined in: [packages/synapse-sdk/src/types.ts:630](https://github.com/FilOzone/synapse-sdk/blob/0c729dad461472f017e4d84f8e6ac16e6afbe7c0/packages/synapse-sdk/src/types.ts#L630)

Pre-built signed extraData (avoids re-signing)

***

### onSubmitted?

> `optional` **onSubmitted?**: (`txHash`) => `void`

Defined in: [packages/synapse-sdk/src/types.ts:637](https://github.com/FilOzone/synapse-sdk/blob/0c729dad461472f017e4d84f8e6ac16e6afbe7c0/packages/synapse-sdk/src/types.ts#L637)

Called when the commit transaction is submitted (before on-chain confirmation).
The hash is Curio's Location wait key and is not guaranteed to be the final
included on-chain hash if Curio replaces the send by fee. Prefer
[CommitResult.confirmedTxHash](/reference/filoz/synapse-sdk/synapse/interfaces/commitresult/#confirmedtxhash) after confirmation.

#### Parameters

| Parameter | Type |
| ------ | ------ |
| `txHash` | `` `0x${string}` `` |

#### Returns

`void`

***

### pieces

> **pieces**: `object`[]

Defined in: [packages/synapse-sdk/src/types.ts:628](https://github.com/FilOzone/synapse-sdk/blob/0c729dad461472f017e4d84f8e6ac16e6afbe7c0/packages/synapse-sdk/src/types.ts#L628)

Pieces to commit with optional per-piece metadata

#### pieceCid

> **pieceCid**: [`PieceCID`](/reference/filoz/synapse-sdk/synapse/interfaces/piececid/)

#### pieceMetadata?

> `optional` **pieceMetadata?**: [`MetadataObject`](/reference/filoz/synapse-sdk/synapse/type-aliases/metadataobject/)