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.
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Parameters

This method takes no parameters.

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Response

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

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Response structure

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

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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

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Big blocks on Hyperliquid

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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

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Usage example

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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

Response

200 - application/json

Successful response with the big block gas price

The response is of type object.