> ## Documentation Index
> Fetch the complete documentation index at: https://docs.chainstack.com/llms.txt
> Use this file to discover all available pages before exploring further.

# eth_usingBigBlocks | Hyperliquid EVM

> Returns whether a specific address is using big blocks on Hyperliquid EVM. Available on Hyperliquid EVM via Chainstack JSON-RPC nodes.

<Info>
  This method is available on Chainstack. Not all Hyperliquid methods are available on Chainstack, as the open-source node implementation does not support them yet — see [Hyperliquid methods](/docs/hyperliquid-methods) for the full availability breakdown.
</Info>

Returns whether a specific address is using big blocks on Hyperliquid EVM. This Hyperliquid-specific method helps determine if an address can utilize enhanced transaction processing capabilities.

## Example request

`eth_usingBigBlocks` is a Hyperliquid-specific JSON-RPC method, so the EVM libraries call it through their generic raw-request escape hatch rather than a wrapped helper.

<CodeGroup>
  ```shell cURL theme={"system"}
  curl -X POST https://hyperliquid-mainnet.core.chainstack.com/4f8d8f4040bdacd1577bff8058438274/evm \
    -H 'Content-Type: application/json' \
    -d '{"jsonrpc":"2.0","method":"eth_usingBigBlocks","params":["0xFC1286EeddF81d6955eDAd5C8D99B8Aa32F3D2AA"],"id":1}'
  ```

  ```python web3.py theme={"system"}
  from web3 import Web3

  w3 = Web3(Web3.HTTPProvider("YOUR_CHAINSTACK_ENDPOINT"))

  # eth_usingBigBlocks is Hyperliquid-specific, so use the raw provider request
  response = w3.provider.make_request("eth_usingBigBlocks", ["0xFC1286EeddF81d6955eDAd5C8D99B8Aa32F3D2AA"])
  print(response["result"])
  ```

  ```javascript ethers.js theme={"system"}
  import { JsonRpcProvider } from "ethers";

  const provider = new JsonRpcProvider("YOUR_CHAINSTACK_ENDPOINT");

  // eth_usingBigBlocks is Hyperliquid-specific, so send a raw JSON-RPC request
  const result = await provider.send("eth_usingBigBlocks", [
    "0xFC1286EeddF81d6955eDAd5C8D99B8Aa32F3D2AA",
  ]);
  console.log(result);
  ```

  ```typescript viem theme={"system"}
  import { createPublicClient, http } from "viem";

  const client = createPublicClient({
    transport: http("YOUR_CHAINSTACK_ENDPOINT"),
  });

  // eth_usingBigBlocks is Hyperliquid-specific, so use the generic request method
  const result = await client.request({
    method: "eth_usingBigBlocks" as any,
    params: ["0xFC1286EeddF81d6955eDAd5C8D99B8Aa32F3D2AA"] as any,
  });
  console.log(result);
  ```
</CodeGroup>

<Note>
  **Use your own endpoint in your code.** The code examples use a placeholder Chainstack endpoint (YOUR\_CHAINSTACK\_ENDPOINT) — replace it with your own Hyperliquid node endpoint from the [Chainstack console](https://console.chainstack.com/). The curl above uses a shared public endpoint for quick checks only; do not use it in production.
</Note>

## Parameters

* `address` (string, required) — The 20-byte address to check for big blocks configuration

## Returns

Returns a boolean indicating whether the address is using big blocks.

* `true` — Address is configured to use big blocks
* `false` — Address is using standard block processing

<Note>
  This is a Hyperliquid-specific method. Big blocks provide enhanced transaction processing capabilities for eligible addresses.
</Note>

## Use cases

* **Gas price optimization** — Choose appropriate gas pricing based on address capabilities
* **Transaction processing** — Optimize transaction handling for big blocks users
* **Feature detection** — Determine available features for specific addresses
* **Wallet applications** — Provide enhanced options for big blocks users
* **DeFi protocols** — Optimize protocol interactions based on user capabilities
* **Analytics** — Track big blocks adoption and usage patterns


## OpenAPI

````yaml openapi/hyperliquid_node_api/hyperevm/evm_eth_using_big_blocks.json post /evm
openapi: 3.0.0
info:
  title: Hyperliquid EVM API - eth_usingBigBlocks
  version: 1.0.0
servers:
  - url: >-
      https://hyperliquid-mainnet.core.chainstack.com/4f8d8f4040bdacd1577bff8058438274
security: []
paths:
  /evm:
    post:
      summary: eth_usingBigBlocks
      description: Returns whether an address is using big blocks on Hyperliquid EVM.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - jsonrpc
                - method
                - params
                - id
              properties:
                jsonrpc:
                  type: string
                  enum:
                    - '2.0'
                  default: '2.0'
                  description: JSON-RPC version
                method:
                  type: string
                  enum:
                    - eth_usingBigBlocks
                  default: eth_usingBigBlocks
                  description: The RPC method name
                params:
                  type: array
                  description: 'Parameters: [address]'
                  default:
                    - '0xFC1286EeddF81d6955eDAd5C8D99B8Aa32F3D2AA'
                id:
                  type: integer
                  default: 1
                  description: Request identifier
            example:
              jsonrpc: '2.0'
              method: eth_usingBigBlocks
              params:
                - '0xFC1286EeddF81d6955eDAd5C8D99B8Aa32F3D2AA'
              id: 1
      responses:
        '200':
          description: Successful response with big blocks usage status
          content:
            application/json:
              schema:
                type: object
                properties:
                  jsonrpc:
                    type: string
                    description: JSON-RPC version
                  id:
                    type: integer
                    description: Request identifier
                  result:
                    type: boolean
                    description: Whether the address is using big blocks
              example:
                jsonrpc: '2.0'
                id: 1
                result: true

````