> For the complete documentation index, see [llms.txt](https://docs.getblock.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.getblock.io/api-reference/optimism-op/optimism_eth_getbalance.md).

# eth\_getBalance - Optimism

Example code for the eth\_getBalance json-rpc method. Сomplete guide on how to use eth\_getBalance json-rpc in GetBlock.io Web3 documentation.

This method retrieves the native ETH balance of any address on the Optimism network. The balance is returned in wei (the smallest unit of ETH, where 1 ETH = 10^18 wei). You can query the balance at a specific block height or use tags like 'latest', 'earliest', or 'pending'. This is essential for wallet applications, balance verification, and transaction validation.

## Parameters

| Parameter | Type           | Description                                              | Required |
| --------- | -------------- | -------------------------------------------------------- | -------- |
| address   | DATA, 20 Bytes | The address to check the balance of.                     | Yes      |
| block     | QUANTITY\|TAG  | Block number in hex, or 'latest', 'earliest', 'pending'. | Yes      |

## Request Sample

{% tabs %}
{% tab title="curl" %}

```bash
curl --location --request POST 'https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "eth_getBalance",
    "params": ["0xb8b2522480f850eb198ada5c3f31ac528538d2f5", "latest"],
    "id": "getblock.io"
}'
```

{% endtab %}

{% tab title="Javascript(Axios)" %}

```bash
import axios from 'axios'
let data = JSON.stringify({
  "jsonrpc": "2.0",
  "method": "eth_getBalance",
  "id": "getblock.io",
  "params": [
        "0xb8b2522480f850eb198ada5c3f31ac528538d2f5",
        "latest"
    ],
};

let config = {
  method: "post",
  maxBodyLength: Infinity,
  url: "https://shared.us-east-1.getblock.io/<ACCESS_TOKEN>",
  headers: {
    "Content-Type": "application/json",
  },
  data: data,
};

axios
  .request(config)
  .then((response) => {
    console.log(JSON.stringify(response.data));
  })
  .catch((error) => {
    console.log(error);
  });

```

{% endtab %}

{% tab title="Python(Request)" %}
{% code overflow="wrap" %}

```py
import requests
import json

url = "https://shared.us-east-1.getblock.io/<ACESS_TOKEN>"

payload = json.dumps({
  "jsonrpc": "2.0",
  "method": "eth_getBalance",
  "id": "getblock.io",
  "params": [
        "0xb8b2522480f850eb198ada5c3f31ac528538d2f5",
        "latest"
    ],
})
headers = {
  'Content-Type': 'application/json'
}

response = requests.request("POST", url, headers=headers, data=payload)

print(response.text)

```

{% endcode %}
{% endtab %}

{% tab title="Rust" %}
{% code overflow="wrap" %}

```rs
import requests
import json

url = "https://shared.us-east-1.getblock.io/<ACESS_TOKEN>"

payload = json.dumps({
  "jsonrpc": "2.0",
  "method": "eth_getBalance",
  "id": "getblock.io",
  "params": [
        "0xb8b2522480f850eb198ada5c3f31ac528538d2f5",
        "latest"
    ],
})
headers = {
  'Content-Type': 'application/json'
}

response = requests.request("POST", url, headers=headers, data=payload)

print(response.text)

```

{% endcode %}
{% endtab %}
{% endtabs %}

## Response

A successful response returns the following:

```json
 {
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": "0x0"
}
```

## Response Parameters

* **`id`**: A unique request identifier, matching the `id` sent in the request body.
* **`jsonrpc`**: Specifies the use of JSON-RPC version 2.0.
* **`result`**: The balance in wei as a hexadecimal string. `0x1bc16d674ec80000` equals 2 ETH (2000000000000000000 wei).

## Use Case

The eth\_getBalance method is commonly used for:

* **Wallet balance display**
* **Transaction validation**
* **Account monitoring**
* **Portfolio tracking**

#### Error handling

| Status Code | Error Message    | Cause                                       |
| ----------- | ---------------- | ------------------------------------------- |
| 404         | Not found        | Missing or invalid ACCESS\_TOKEN.           |
| -32602      | Invalid argument | Wallet address isn't accurate or incomplete |

### Integration with Web3

The `eth_getBalance` can help developers:

* Fetch balances dynamically without requiring a transaction
* Power trustless dashboards and explorers
* Validate user accounts before executing transactions
* Track portfolio values in real time
* Access historical balances using specific block numbers

{% tabs %}
{% tab title="Ethers.js" %}
{% code overflow="wrap" %}

```javascript
import { ethers } from "ethers";
const RPC_URL = "https://shared.us-east-1.getblock.io/<ACCESS_TOKEN>";
const provider = new ethers.JsonRpcProvider(RPC_URL);
async function Call() {
  try {
     const result = await provider.send("eth_getBalance", ["0xb8b2522480f850eb198ada5c3f31ac528538d2f5", "latest"]);
    console.log("The result:", result);
    return result;
  } catch (error) {
    console.error("The error:", error);
    throw error;
  }
}
```

{% endcode %}
{% endtab %}

{% tab title="Viem" %}

```jsx
import { createPublicClient, http } from 'viem';
import { optimism } from 'viem/chains';

// Create Viem client with GetBlock
const client = createPublicClient({
  chain: optimism,
  transport: http('https://shared.us-east-1.getblock.io/<ACCESS_TOKEN>'),
});

// Using the method through Viem
async function Call() {
    try {
        // Method-specific Viem implementation
        const result = await client.request({
            method: 'eth_getBalance',
            params: ["0xb8b2522480f850eb198ada5c3f31ac528538d2f5", "latest"],
        });
        console.log('Result:', result);
        return result;
    } catch (error) {
        console.error('Viem Error:', error);
        throw error;
    }
}

```

{% endtab %}
{% endtabs %}