eth_feeHistory - BSC

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

This method returns historical gas information for fee estimation on BSC.

Note: BSC uses legacy gas pricing and does not fully implement EIP-1559, so this method may have limited functionality compared to Ethereum.

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

Percentile values for priority fees

Request Example

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"
}'

example.js

const axios = require('axios');

const url = 'https://go.getblock.io/<ACCESS-TOKEN>/';

const payload = {
    jsonrpc: '2.0',
    method: 'eth_feeHistory',
    params: ['0x5', 'latest', [25, 50, 75]],
    id: 'getblock.io'
};

axios.post(url, payload, {
    headers: { 'Content-Type': 'application/json' }
})
.then(response => console.log(JSON.stringify(response.data, null, 2)))
.catch(error => console.error(error));

example.py

import requests
import json

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

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

response = requests.post(url, headers={"Content-Type": "application/json"}, json=payload)
print(json.dumps(response.json(), indent=2))

main.rs

use reqwest::Client;
use serde_json::json;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::new();
    
    let payload = json!({
        "jsonrpc": "2.0",
        "method": "eth_feeHistory",
        "params": ["0x5", "latest", [25, 50, 75]],
        "id": "getblock.io"
    });

    let response = client
        .post("https://go.getblock.io/<ACCESS-TOKEN>/")
        .header("Content-Type", "application/json")
        .json(&payload)
        .send()
        .await?;

    let result: serde_json::Value = response.json().await?;
    println!("{:#?}", result);
    
    Ok(())
}

Response Example

response.json

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": {
        "oldestBlock": "0x4a8f7e7",
        "reward": [
            [
                "0x2faf080",
                "0x3938700",
                "0x5f5e100"
            ]
        ],
        "baseFeePerGas": [
            "0x0",
            "0x0"
        ],
        "gasUsedRatio": [
            0.10401812727272727
        ],
        "baseFeePerBlobGas": [
            "0x1",
            "0x1"
        ],
        "blobGasUsedRatio": [
            0.16666666666666666
        ]
    }
}

Response Parameters

Parameter

Type

Description

baseFeePerGas

array

Base fees (typically 0 on BSC)

gasUsedRatio

array

Ratio of gas used per block

oldestBlock

string

Starting block number

reward

array

Priority fee percentiles

Use Cases

Analyze historical gas usage patterns
Monitor network congestion trends
Build gas price prediction models
Optimize transaction timing

Error Handling

Error Code

Description

-32602

Invalid params - invalid block count or range

-32603

Internal error - node processing issues

SDK Integration

ethers.js

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

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

const feeData = await provider.getFeeData();
console.log('Gas Price:', ethers.formatUnits(feeData.gasPrice, 'gwei'), 'Gwei');

viem.js

import { createPublicClient, http, formatGwei } from 'viem';
import { bsc } from 'viem/chains';

const client = createPublicClient({
    chain: bsc,
    transport: http('https://go.getblock.io/<ACCESS-TOKEN>/')
});

const gasPrice = await client.getGasPrice();
console.log('Gas Price:', formatGwei(gasPrice), 'Gwei');

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