eth_feeHistory - HyperEVM

Example code for the eth_feeHistory JSON RPC method. Сomplete guide on how to use eth_feeHistory GetBlock JSON RPC in GetBlock Web3 documentation.

This method returns historical gas information for EIP-1559 fee estimation.

Parameters

Parameter

Type

Required

Description

blockCount

string

Yes

Number of blocks to return (hex).

newestBlock

string

Yes

Newest block ("latest" or block number).

rewardPercentiles

array

Percentiles for priority fee sampling.

Request

curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "eth_feeHistory",
    "params": ["0x5", "latest", [25, 50, 75]],
    "id": "getblock.io"
}'

import requests
import json

url = "https://go.getblock.io/<ACCESS-TOKEN>/"

payload = json.dumps({
    "jsonrpc": "2.0",
    "method": "eth_feeHistory",
    "params": ["0x5", "latest", [25, 50, 75]],
    "id": "getblock.io"
})

headers = {
    'Content-Type': 'application/json'
}

response = requests.post(url, headers=headers, data=payload)
print(response.text)

use reqwest::header;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = reqwest::Client::new();
    
    let response = client
        .post("https://go.getblock.io/<ACCESS-TOKEN>/")
        .header(header::CONTENT_TYPE, "application/json")
        .body(r#"{
            "jsonrpc": "2.0",
            "method": "eth_feeHistory",
            "params": ["0x5", "latest", [25, 50, 75]],
            "id": "getblock.io"
            }"#)
        .send()
        .await?;
    
    println!("{}", response.text().await?);
    Ok(())
}

cURL

curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "eth_feeHistory",
    "params": ["0x5", "latest", [25, 50, 75]],
    "id": "getblock.io"
}'

ethers.js

const { ethers } = require('ethers');

const provider = new ethers.JsonRpcProvider('https://go.getblock.io/<ACCESS-TOKEN>/');

async function getFeeHistory() {
    const feeHistory = await provider.send('eth_feeHistory', ['0x5', 'latest', [25, 50, 75]]);
    console.log('Base Fee Per Gas:', feeHistory.baseFeePerGas);
}

getFeeHistory();

web3.py

from web3 import Web3

w3 = Web3(Web3.HTTPProvider('https://go.getblock.io/<ACCESS-TOKEN>/'))

fee_history = w3.eth.fee_history(5, 'latest', [25, 50, 75])
print(f'Base Fee History: {fee_history["baseFeePerGas"]}')

Rust (reqwest)

use reqwest::header;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = reqwest::Client::new();
    
    let response = client
        .post("https://go.getblock.io/<ACCESS-TOKEN>/")
        .header(header::CONTENT_TYPE, "application/json")
        .body(r#"{
            "jsonrpc": "2.0",
            "method": "eth_feeHistory",
            "params": ["0x5", "latest", [25, 50, 75]],
            "id": "getblock.io"
        }"#)
        .send()
        .await?;
    
    println!("{}", response.text().await?);
    Ok(())
}

Response

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": {
        "oldestBlock": "0x1b0",
        "baseFeePerGas": ["0x3b9aca00", "0x3b9aca00", "0x3b9aca00", "0x3b9aca00", "0x3b9aca00", "0x3b9aca00"],
        "gasUsedRatio": [0.0, 0.1, 0.05, 0.0, 0.2],
        "reward": [
            ["0x0", "0x0", "0x0"],
            ["0x0", "0x0", "0x0"],
            ["0x0", "0x0", "0x0"],
            ["0x0", "0x0", "0x0"],
            ["0x0", "0x0", "0x0"]
        ]
    }
}

Response Parameters

Field

Type

Description

oldestBlock

string

Oldest block in returned range (hex).

baseFeePerGas

array

Base fee per gas for each block (hex).

gasUsedRatio

array

Gas used ratio (0 to 1) for each block.

reward

array

Priority fee percentiles per block.

Use Case

The eth_feeHistory method is essential for:

EIP-1559 fee estimation
Dynamic gas price strategies
Transaction cost prediction
Fee optimization algorithms
Network congestion analysis

Error Handling

Error Code

Message

Cause

-32602

Invalid params

Invalid block count or percentiles.

-32603

Internal error

Node issue.

Web3 Integration

const { ethers } = require('ethers');

const provider = new ethers.JsonRpcProvider('https://go.getblock.io/<ACCESS-TOKEN>/');

async function getFeeHistory() {
    const feeHistory = await provider.send('eth_feeHistory', ['0x5', 'latest', [25, 50, 75]]);
    console.log('Base Fee Per Gas:', feeHistory.baseFeePerGas);
}

getFeeHistory();

import { createPublicClient, http } from "viem";
import { hyperEvm } from "viem/chains";

// Create Viem client with GetBlock
const client = createPublicClient({
  chain: hyperEvm,
  transport: http(import.meta.env.HYPER_ACCESS_TOKEN),
});

// Using the method through Viem
async function Call() {
  try {
    // Method-specific Viem implementation
    const result = await client.request({
    method: "eth_feeHistory",
    params: ["0x5", "latest", [25, 50, 75]],
    });
    return result;
  } catch (error) {
    console.error("Viem Error:", error);
    throw error;
  }
}

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