# SignSignature (ById)

Executes a confirmed signature request by performing the cryptographic signing operation. It returns the completed signature in the appropriate format.

**Prerequisites:**

* Signature request must be in **READY** status (use confirm endpoint first)

{% code overflow="wrap" %}

```cpp
void SignSignatureById_TransactionSignature(FString Id, const FVyUserAuth& SigningMethod, const FVySignSignatureById_TransactionSignatureRequest& Params, const FVyOnSignSignatureById_TransactionSignatureComplete& OnComplete) const;
```

{% endcode %}

\
**Parameters**

| Id            | FString                                                                                                                                                                      | UUID of the signature request to execute                                                |
| ------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------- |
| SigningMethod | FVyUserAuth                                                                                                                                                                  | The Id and Value of one of the user's registered signing-methods                        |
| Params        | [FVySignSignatureById\_TransactionSignatureRequest](https://sdk.venly.io/sdk-reference/ue5-sdk-v3/object-references/wallet/fvysignsignaturebyid_transactionsignaturerequest) | Parameters for this operation (FVySignSignatureById\_TransactionSignatureRequest)       |
| OnComplete    | FVyOnSignSignatureById\_TransactionSignatureComplete                                                                                                                         | The callback function called when the user preferences retrieval operation is complete. |

\
**OnComplete Callback** (FVyOnSignSignatureById\_TransactionSignatureComplete)\
Contains a [FVyTransactionSignatureDto](https://sdk.venly.io/sdk-reference/ue5-sdk-v3/object-references/wallet/fvytransactionsignaturedto) response type