# UseUploadProps

Defined in: [synapse-react/src/warm-storage/use-upload.ts:9](https://github.com/FilOzone/synapse-sdk/blob/2c515fb6328c4f7a68ed82653d96ab11299e177d/packages/synapse-react/src/warm-storage/use-upload.ts#L9)

## Properties

### mutation?

> `optional` **mutation**: [`Omit`](https://www.typescriptlang.org/docs/handbook/utility-types.html#omittype-keys)\<`MutateOptions`\<\{ `addMessageOk`: `true`; `confirmedPieceIds`: `bigint`[]; `dataSetId`: `bigint`; `pieceCount`: `number`; `piecesAdded`: `true`; `txHash`: `` `0x${string}` ``; `txStatus`: `"confirmed"`; \}, [`Error`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error), [`UseUploadVariables`](/reference/filoz/synapse-react/interfaces/useuploadvariables/), `unknown`\>, `"mutationFn"`\>

Defined in: [synapse-react/src/warm-storage/use-upload.ts:15](https://github.com/FilOzone/synapse-sdk/blob/2c515fb6328c4f7a68ed82653d96ab11299e177d/packages/synapse-react/src/warm-storage/use-upload.ts#L15)

***

### onHash()?

> `optional` **onHash**: (`hash`) => `void`

Defined in: [synapse-react/src/warm-storage/use-upload.ts:13](https://github.com/FilOzone/synapse-sdk/blob/2c515fb6328c4f7a68ed82653d96ab11299e177d/packages/synapse-react/src/warm-storage/use-upload.ts#L13)

The callback to call when the hash is available.

#### Parameters

| Parameter | Type |
| ------ | ------ |
| `hash` | `string` |

#### Returns

`void`

***

### sessionKey?

> `optional` **sessionKey**: [`SessionKey`](/reference/filoz/synapse-core/session-key/interfaces/sessionkey/)

Defined in: [synapse-react/src/warm-storage/use-upload.ts:14](https://github.com/FilOzone/synapse-sdk/blob/2c515fb6328c4f7a68ed82653d96ab11299e177d/packages/synapse-react/src/warm-storage/use-upload.ts#L14)