# CommitOptions

Defined in: [packages/synapse-sdk/src/types.ts:617](https://github.com/FilOzone/synapse-sdk/blob/218f90f1cf7635dc33af6f880b64b845c99676bc/packages/synapse-sdk/src/types.ts#L617)

Options for committing pieces on-chain

## Properties

### extraData?

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

Defined in: [packages/synapse-sdk/src/types.ts:621](https://github.com/FilOzone/synapse-sdk/blob/218f90f1cf7635dc33af6f880b64b845c99676bc/packages/synapse-sdk/src/types.ts#L621)

Pre-built signed extraData (avoids re-signing)

***

### onSubmitted?

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

Defined in: [packages/synapse-sdk/src/types.ts:623](https://github.com/FilOzone/synapse-sdk/blob/218f90f1cf7635dc33af6f880b64b845c99676bc/packages/synapse-sdk/src/types.ts#L623)

Called when the commit transaction is submitted (before on-chain confirmation)

#### Parameters

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

#### Returns

`void`

***

### pieces

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

Defined in: [packages/synapse-sdk/src/types.ts:619](https://github.com/FilOzone/synapse-sdk/blob/218f90f1cf7635dc33af6f880b64b845c99676bc/packages/synapse-sdk/src/types.ts#L619)

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/)