# BuildSignatureRequest\_Message

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_Message(const FVyBuildSignatureRequest_MessageRequest& Params, const FVyOnBuildSignatureRequest_MessageComplete& OnComplete) const;
```

{% endcode %}

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**Parameters**

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

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