> 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/c-sdk-v3/function-references/wallet/transactions/buildtransaction.md).

# BuildTransaction

### Description

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

**What this endpoint does:**

* Validates transaction data against the specified blockchain network
* Converts generic amounts to blockchain-native units (e.g., 0.1 SUI → 100000000 MIST)
* Calculates and populates network-specific parameters (gas price, gas budget, nonce)
* Transforms generic transaction types to chain-specific types (TRANSFER → SUI\_TRANSFER)
* Returns a structured transaction request ready for confirmation and execution

**Supported transaction types:**

* **Native transfers**:\ Send blockchain's native currency (ETH, SUI, MATIC, etc.)
* **Token transfers**:\ Send ERC-20 or equivalent tokens
* **NFT transfers**:\ Transfer ERC-721/ERC-1155 or equivalent NFTs
* **Contract execution**:\ Call smart contract functions
* **Multi-transfers**:\ Batch multiple operations (Hedera only)

{% code overflow="wrap" %}

```csharp
public static VyTask<VyTransactionRequestBase> BuildTransaction(VyBuildTransactionRequestBase reqParams)
```

{% endcode %}

{% tabs %}
{% tab title="Details" %}
**Parameters**

| reqParams | [VyBuildTransactionRequestBase](/sdk-reference/c-sdk-v3/object-references/wallet/vybuildtransactionrequestbase.md) | Request data for the operation |
| --------- | ------------------------------------------------------------------------------------------------------------------ | ------------------------------ |

**Returns**

VyTask<[VyTransactionRequestBase](/sdk-reference/c-sdk-v3/object-references/wallet/vytransactionrequestbase.md)>\
Transaction prepared for a specific chain successfully.
{% endtab %}
{% endtabs %}