eth_gasPrice - Polygon

Example code for the eth_gasPrice json-rpc method. Сomplete guide on how to use eth_gasPrice json-rpc in GetBlock.io Web3 documentation.

The eth_gasPrice method returns the current gas price in wei. This value represents the median gas price of the most recent blocks and is useful for estimating transaction costs. On Polygon, gas prices are typically very low compared to Ethereum mainnet.

Parameters

None

Request

cURL

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

request.js

import axios from 'axios';

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

const payload = {
    jsonrpc: '2.0',
    method: 'eth_gasPrice',
    params: [],
    id: 'getblock.io'
};

axios.post(url, payload, {
    headers: { 'Content-Type': 'application/json' }
})
.then(response => {
    const gasPriceWei = parseInt(response.data.result, 16);
    const gasPriceGwei = gasPriceWei / 1e9;
    console.log(`Gas Price: ${gasPriceGwei} Gwei`);
})
.catch(error => console.error(error));

request.py

import requests

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

payload = {
    "jsonrpc": "2.0",
    "method": "eth_gasPrice",
    "params": [],
    "id": "getblock.io"
}

response = requests.post(url, headers={"Content-Type": "application/json"}, json=payload)
result = response.json()
gas_price_wei = int(result["result"], 16)
gas_price_gwei = gas_price_wei / 1e9
print(f"Gas Price: {gas_price_gwei} Gwei")

main.rs

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_gasPrice",
            "params": [],
            "id": "getblock.io"
        }"#)
        .send()
        .await?;
    
    println!("{}", response.text().await?);
    Ok(())
}

Response

response.json

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": "0x6FC23AC00"
}

Response parameters

Field

Type

Description

jsonrpc

string

JSON-RPC version (2.0)

string

Request identifier

result

string

Current gas price in wei (hexadecimal)

Use case

The eth_gasPrice method is essential for:

Transaction cost calculation: Estimate total cost before sending transactions
Gas price monitoring: Track network congestion levels
Dynamic pricing: Adjust gas prices based on network conditions
Budget management: Ensure sufficient funds for transactions
Arbitrage: Monitor gas prices for MEV opportunities

Example: Transaction Cost Calculator

calculateTransactionCost.js

async function calculateTransactionCost(provider, gasLimit) {
    const gasPrice = await provider.send('eth_gasPrice', []);
    const gasPriceWei = BigInt(gasPrice);
    const totalCost = gasPriceWei * BigInt(gasLimit);
    
    return {
        gasPrice: gasPriceWei,
        gasPriceGwei: Number(gasPriceWei) / 1e9,
        totalCostWei: totalCost,
        totalCostMatic: Number(totalCost) / 1e18
    };
}

Error handling

Status Code

Error Message

Cause

403

Forbidden

Missing or invalid ACCESS-TOKEN

-32600

Invalid Request

Malformed request body

Web3 integration

ethers.js

import { ethers } from 'ethers';

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

// Get fee data (includes gas price)
const feeData = await provider.getFeeData();
console.log('Gas Price:', ethers.formatUnits(feeData.gasPrice, 'gwei'), 'Gwei');

// Using raw RPC call
const gasPrice = await provider.send('eth_gasPrice', []);
console.log('Gas Price (hex):', gasPrice);

viem.js

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

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

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

Previouseth_feeHistory - Polygon Nexteth_getBalance - Polygon

Last updated 17 days ago

Was this helpful?

hashtagParameters

hashtagRequest

hashtagResponse

hashtagResponse parameters

hashtagUse case

hashtagExample: Transaction Cost Calculator

hashtagError handling

hashtagWeb3 integration

Parameters

Request

Response

Response parameters

Use case

Example: Transaction Cost Calculator

Error handling

Web3 integration