# BuildSignatureRequest\_Eip712

Transforms a generic signature request into a blockchain-specific signature request with all necessary parameters populated for the target network.

**Supported operations:**

* **Plain Message signing**
* **EIP-712 structured data signing**

{% code overflow="wrap" %}

```cpp
void BuildSignatureRequest_Eip712(const FVyBuildSignatureRequest_Eip712Request& Params, const FVyOnBuildSignatureRequest_Eip712Complete& OnComplete) const;
```

{% endcode %}

\
**Parameters**

| Params     | [FVyBuildSignatureRequest\_Eip712Request](https://sdk.venly.io/sdk-reference/ue5-sdk-v3/object-references/wallet/fvybuildsignaturerequest_eip712request) | Parameters for this operation (FVyBuildSignatureRequest\_Eip712Request)                 |
| ---------- | -------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------- |
| OnComplete | FVyOnBuildSignatureRequest\_Eip712Complete                                                                                                               | The callback function called when the user preferences retrieval operation is complete. |

\
**OnComplete Callback** (FVyOnBuildSignatureRequest\_Eip712Complete)\
Contains a [FVyBuildSignatureResultDto](https://sdk.venly.io/sdk-reference/ue5-sdk-v3/object-references/wallet/fvybuildsignatureresultdto) response type