> For the complete documentation index, see [llms.txt](https://sdk.venly.io/sdk-reference/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sdk.venly.io/sdk-reference/ue5-sdk-v3/function-references/wallet/signatures/signsignaturebyid/signsignaturebyid_0.md).

# 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_HexSignature(FString Id, const FVyUserAuth& SigningMethod, const FVySignSignatureById_HexSignatureRequest& Params, const FVyOnSignSignatureById_HexSignatureComplete& 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\_HexSignatureRequest](/sdk-reference/ue5-sdk-v3/object-references/wallet/fvysignsignaturebyid_hexsignaturerequest.md) | Parameters for this operation (FVySignSignatureById\_HexSignatureRequest)               |
| OnComplete    | FVyOnSignSignatureById\_HexSignatureComplete                                                                                                | The callback function called when the user preferences retrieval operation is complete. |

\
**OnComplete Callback** (FVyOnSignSignatureById\_HexSignatureComplete)\
Contains a [FVyHexSignatureDto](/sdk-reference/ue5-sdk-v3/object-references/wallet/fvyhexsignaturedto.md) response type