# eth_usingBigBlocks

> For the complete documentation index, see [llms.txt](/docs/llms.txt).

POST https://hyperliquid-mainnet.g.alchemy.com/v2/{apiKey}

Returns whether the specified address has opted into using big blocks. In HyperEVM's dual-block architecture, users can set an usingBigBlocks flag via the evmUserModify L1 action to direct their transactions to big blocks instead of fast blocks.

Reference: https://www.alchemy.com/docs/chains/hyperliquid/hyperliquid-api-endpoints/eth-using-big-blocks

## Parameters

| Name | Type | Required | Description |
|------|------|----------|-------------|
| address | string | Yes | The 20-byte hex-encoded Ethereum address to check. |

## Result

**usingBigBlocks** (boolean): A boolean indicating whether the address is using big blocks.

## Code Examples

### cURL

```bash
curl --request POST \
  --url https://hyperliquid-mainnet.g.alchemy.com/v2/docs-demo \
  --header 'Content-Type: application/json' \
  --data '{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "eth_usingBigBlocks",
  "params": [
    "string"
  ]
}'
```

### JavaScript

```javascript
const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({jsonrpc: '2.0', id: 1, method: 'eth_usingBigBlocks', params: ['string']})
};

fetch('https://hyperliquid-mainnet.g.alchemy.com/v2/docs-demo', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));
```

### Python

```python
import requests

url = "https://hyperliquid-mainnet.g.alchemy.com/v2/docs-demo"

payload = {
    "jsonrpc": "2.0",
    "id": 1,
    "method": "eth_usingBigBlocks",
    "params": ["string"]
}
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)
```

### Go

```go
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://hyperliquid-mainnet.g.alchemy.com/v2/docs-demo"

	payload := strings.NewReader("{\n  \"jsonrpc\": \"2.0\",\n  \"id\": 1,\n  \"method\": \"eth_usingBigBlocks\",\n  \"params\": [\n    \"string\"\n  ]\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}
```

### Java

```java
HttpResponse<String> response = Unirest.post("https://hyperliquid-mainnet.g.alchemy.com/v2/docs-demo")
  .header("Content-Type", "application/json")
  .body("{\n  \"jsonrpc\": \"2.0\",\n  \"id\": 1,\n  \"method\": \"eth_usingBigBlocks\",\n  \"params\": [\n    \"string\"\n  ]\n}")
  .asString();
```

### C#

```csharp
using RestSharp;


var options = new RestClientOptions("https://hyperliquid-mainnet.g.alchemy.com/v2/docs-demo");
var client = new RestClient(options);
var request = new RestRequest("");
request.AddJsonBody("{\n  \"jsonrpc\": \"2.0\",\n  \"id\": 1,\n  \"method\": \"eth_usingBigBlocks\",\n  \"params\": [\n    \"string\"\n  ]\n}", false);
var response = await client.PostAsync(request);

Console.WriteLine("{0}", response.Content);

```


## OpenRPC Method Specification

```yaml
name: eth_usingBigBlocks
summary: Check if an address uses big blocks
description: Returns whether the specified address has opted into using big blocks. In HyperEVM's dual-block architecture, users can set an usingBigBlocks flag via the evmUserModify L1 action to direct their transactions to big blocks instead of fast blocks.
params:
  - name: address
    required: true
    description: The 20-byte hex-encoded Ethereum address to check.
    schema:
      type: string
result:
  name: usingBigBlocks
  description: A boolean indicating whether the address is using big blocks.
  schema:
    type: boolean
    example: false
```