# 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" %}

```javascript
public buildTransaction(reqParams: VyBuildTransactionRequestBase) : VyPromise<VyTransactionRequestBase>
```

{% endcode %}

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

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

**Returns**

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


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