> ## 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_bigBlockGasPrice | Hyperliquid EVM
> The eth_bigBlockGasPrice JSON-RPC method returns the base fee for the next big block on Hyperliquid EVM. Hyperliquid EVM via Chainstack.
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.
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.
## 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:**
```javascript theme={"system"}
// 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
### Related methods
**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
```javascript theme={"system"}
// 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 Shell theme={"system"}
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.
## OpenAPI
````yaml /openapi/hyperliquid_node_api/evm_eth_big_block_gas_price.json post /evm
openapi: 3.0.0
info:
title: Hyperliquid EVM API - eth_bigBlockGasPrice
version: 1.0.0
servers:
- url: >-
https://hyperliquid-mainnet.core.chainstack.com/4f8d8f4040bdacd1577bff8058438274
security: []
paths:
/evm:
post:
summary: eth_bigBlockGasPrice
description: Returns the gas price for large 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_bigBlockGasPrice
default: eth_bigBlockGasPrice
description: The RPC method name
params:
type: array
description: No parameters required
default: []
id:
type: integer
default: 1
description: Request identifier
example:
jsonrpc: '2.0'
method: eth_bigBlockGasPrice
params: []
id: 1
responses:
'200':
description: Successful response with the big block gas price
content:
application/json:
schema:
type: object
properties:
jsonrpc:
type: string
description: JSON-RPC version
id:
type: integer
description: Request identifier
result:
type: string
description: The big block gas price in wei as a hexadecimal string
example:
jsonrpc: '2.0'
id: 1
result: '0x3b9aca00'
````