> For the complete documentation index, see [llms.txt](https://docs.altura.com/altura-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.altura.com/altura-documentation/api-reference/altura-guard-ii/transaction-requests/submitting-a-contract-transaction-request.md).

# Submitting a contract transaction request

Before requesting a transaction, ensure that you encode the value in hexadecimal format.

```javascript
const value = "0x0"
```

You also need to add the necessary parameters before requesting a transaction.

```javascript
const from = userAddress //the address you're sending from (connected users address)
const to = "0x0000000000000000000000000000000000000000" // the address you're sending the transaction to 
```

Now we need to get the data to send to represent the contract data. In this example we are approving 0.1 BUSD

```javascript
// create the tx object
// BUSD contract address: 0x78867BbEeF44f2326bF8DDd1941a4439382EF2A7
const contractAddress = "0x78867BbEeF44f2326bF8DDd1941a4439382EF2A7";
// Approve function ABI
const abi = [
  {
    inputs: [
      { internalType: "address", name: "spender", type: "address" },
      { internalType: "uint256", name: "amount", type: "uint256" },
    ],
    name: "approve",
    outputs: [{ internalType: "bool", name: "", type: "bool" }],
    stateMutability: "nonpayable",
    type: "function",
  },
];
const contract = new ethers.Contract(contractAddress, abi);

// Set the parameters for the transaction
const spender = userAddress; // the address of the spender (user connected)
const amount = ethers.parseEther("0.1"); // the amount to approve
const data = contract.interface.encodeFunctionData("approve", [
     spender,
     amount,
]);
```

Next, create the transaction object

```javascript
const tx = {
  from,
  to,
  data,
  value,
},
```

Finally, obtain the chain ID, which can be found at the following URL: (<https://chainlist.org>)

```javascript
const chainId = 1; // ETH chain id
```

<mark style="color:green;">`POST`</mark> `https://api.alturanft.com/api/alturaguard/request`

#### Request Body

| Name                                            | Type   | Description                             |
| ----------------------------------------------- | ------ | --------------------------------------- |
| token<mark style="color:red;">\*</mark>         | String | User token recieved when authenticating |
| reqParameters<mark style="color:red;">\*</mark> | array  | `["transaction", tx, chainId]`          |

{% tabs %}
{% tab title="200: OK requestId" %}

```javascript
requestId
```

{% endtab %}

{% tab title="400: Bad Request Invalid reqParameters" %}

{% endtab %}

{% tab title="401: Unauthorized Invalid token" %}

{% endtab %}
{% endtabs %}