Skip to main content
POST
/
evm
eth_bigBlockGasPrice
curl --request POST \
  --url https://hyperliquid-mainnet.core.chainstack.com/4f8d8f4040bdacd1577bff8058438274/evm \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "method": "eth_bigBlockGasPrice",
  "params": [],
  "id": 1
}
'
{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x3b9aca00"
}
The eth_bigBlockGasPrice JSON-RPC method returns the base fee for the next big block on Hyperliquid EVM. This is a Hyperliquid-specific method that provides gas pricing for addresses using big blocks.
Get your own node endpoint todayStart for free and get your app to production levels immediately. No credit card required.You can sign up with your GitHub, X, Google, or Microsoft account.

​
Parameters

This method takes no parameters.

​
Response

The method returns the big block gas price as a hexadecimal string representing wei.

​
Response structure

Big block gas price:
  • result — The base fee for the next big block in wei as a hexadecimal string

​
Data interpretation

Gas price format:
  • Returned as hexadecimal string with 0x prefix
  • Value represents wei (smallest unit of ether)
  • Convert to gwei by dividing by 10^9
  • Convert to ether by dividing by 10^18
Price calculation: 
// Convert big block gas price to different units
const bigBlockGasPriceWei = parseInt("0x3b9aca00", 16); // 1000000000 wei
const bigBlockGasPriceGwei = bigBlockGasPriceWei / 1e9; // 1 gwei
const bigBlockGasPriceEther = bigBlockGasPriceWei / 1e18; // 0.000000001 ether

​
Big blocks on Hyperliquid

​
Overview

Big blocks are a Hyperliquid-specific feature that allows certain addresses to use larger block space. The eth_bigBlockGasPrice method returns the base fee specifically for these big blocks. Key differences:
  • Big block gas price may differ from standard gas price (eth_gasPrice)
  • Only addresses using big blocks need this pricing information
  • Use eth_usingBigBlocks to check if an address is using big blocks
Check big block usage:
  • eth_usingBigBlocks — returns whether an address is using big blocks
  • eth_gasPrice — returns the base fee for standard (small) blocks

​
Usage example

​
Basic implementation

// Get big block gas price
const getBigBlockGasPrice = async () => {
  const response = await fetch('https://hyperliquid-mainnet.core.chainstack.com/YOUR_ENDPOINT/evm', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      jsonrpc: '2.0',
      method: 'eth_bigBlockGasPrice',
      params: [],
      id: 1
    })
  });
  
  const data = await response.json();
  return data.result;
};

// Compare with standard gas price
const compareGasPrices = async () => {
  const [standardPrice, bigBlockPrice] = await Promise.all([
    // Standard gas price call
    fetch('https://hyperliquid-mainnet.core.chainstack.com/YOUR_ENDPOINT/evm', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        jsonrpc: '2.0',
        method: 'eth_gasPrice',
        params: [],
        id: 1
      })
    }).then(r => r.json()),
    
    // Big block gas price call
    getBigBlockGasPrice()
  ]);
  
  return {
    standard: standardPrice.result,
    bigBlock: bigBlockPrice,
    standardGwei: parseInt(standardPrice.result, 16) / 1e9,
    bigBlockGwei: parseInt(bigBlockPrice, 16) / 1e9
  };
};

​
Example request

Shell
curl -X POST \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_bigBlockGasPrice","params":[],"id":1}' \
  https://hyperliquid-mainnet.core.chainstack.com/4f8d8f4040bdacd1577bff8058438274/evm

​
Use cases

The eth_bigBlockGasPrice method is useful for:
  • Big block users: Get appropriate gas pricing when your address is using big blocks
  • Gas price comparison: Compare big block pricing with standard block pricing
  • Transaction cost optimization: Choose the most cost-effective gas price option
  • Wallet applications: Display accurate gas pricing for addresses using big blocks
  • DeFi applications: Optimize transaction costs based on block type usage
  • Analytics tools: Monitor and compare different gas pricing options on Hyperliquid
  • Development tools: Test applications with different gas pricing scenarios
This is a Hyperliquid-specific method that returns the base fee for the next big block. Use eth_usingBigBlocks to check if an address is using big blocks, and compare with eth_gasPrice for standard block pricing.

Body

application/json
​
jsonrpc
enum<string>
default:2.0
required

JSON-RPC version

Available options:
2.0
​
method
enum<string>
default:eth_bigBlockGasPrice
required

The RPC method name

Available options:
eth_bigBlockGasPrice
​
params
array
required

No parameters required

​
id
integer
default:1
required

Request identifier

Response

200 - application/json

Successful response with the big block gas price

​
jsonrpc
string

JSON-RPC version

​
id
integer

Request identifier

​
result
string

The big block gas price in wei as a hexadecimal string

Last modified on October 19, 2025