eth_estimateGas - opBNB

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

This method estimates the gas required to execute a transaction without committing it. Use it to determine an appropriate gas value before broadcasting.

Parameters

Parameter

Type

Required

Description

callObject

object

Yes

Transaction-shaped object with to, data, and optional from, value

blockParameter

string

Optional block parameter (default: "latest")

Request Example

curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "eth_estimateGas",
    "params": [
        {
            "from": "0x9e7c5e3e3a3b8e1aa0e2d4c7f9d4b0c8b8d5f1a2",
            "to": "0xd85498dbeaeb1df24be52eed4f52eac2fbd56245",
            "value": "0x16345785d8a0000"
        }
    ],
    "id": "getblock.io"
}'

import axios from 'axios';

const data = JSON.stringify({
    "jsonrpc": "2.0",
    "method": "eth_estimateGas",
    "params": [
        {
            "from": "0x9e7c5e3e3a3b8e1aa0e2d4c7f9d4b0c8b8d5f1a2",
            "to": "0xd85498dbeaeb1df24be52eed4f52eac2fbd56245",
            "value": "0x16345785d8a0000"
        }
    ],
    "id": "getblock.io"
});

const config = {
    method: 'post',
    url: 'https://go.getblock.io/<ACCESS-TOKEN>/',
    headers: {
        'Content-Type': 'application/json'
    },
    data: data
};

axios(config)
    .then(response => console.log(JSON.stringify(response.data, null, 2)))
    .catch(error => console.log(error));

import requests
import json

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

payload = json.dumps({
    "jsonrpc": "2.0",
    "method": "eth_estimateGas",
    "params": [
        {
            "from": "0x9e7c5e3e3a3b8e1aa0e2d4c7f9d4b0c8b8d5f1a2",
            "to": "0xd85498dbeaeb1df24be52eed4f52eac2fbd56245",
            "value": "0x16345785d8a0000"
        }
    ],
    "id": "getblock.io"
})

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

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

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_estimateGas",
        "params": [
                {
                        "from": "0x9e7c5e3e3a3b8e1aa0e2d4c7f9d4b0c8b8d5f1a2",
                        "to": "0xd85498dbeaeb1df24be52eed4f52eac2fbd56245",
                        "value": "0x16345785d8a0000"
                }
        ],
        "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

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": "0x5208"
}

Response Parameters

Field

Type

Description

result

string

Estimated gas units required (hex)

Use Cases

Setting an appropriate gas limit before signing a transaction
Showing users an estimated cost in wallet UIs
Detecting transactions that would revert (estimate fails)
Computing fee budgets in server-side automation

Error Handling

Status Code

Error Message

Cause

403

Forbidden

Missing or invalid <ACCESS-TOKEN>

-32602

Invalid params

Request parameters are missing or malformed

-32601

Method not found

The method is not supported by this node

429

Too Many Requests

Rate limit exceeded for your plan

-32000

Execution reverted

Transaction would revert; estimate cannot be returned

SDK Integration

import { ethers } from 'ethers';

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

// Most methods are exposed directly on the provider.
// For raw access, use provider.send(method, params).
const result = await provider.send('eth_estimateGas', [{"from": "0x9e7c5e3e3a3b8e1aa0e2d4c7f9d4b0c8b8d5f1a2", "to": "0xd85498dbeaeb1df24be52eed4f52eac2fbd56245", "value": "0x16345785d8a0000"}]);
console.log(result);

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

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

const result = await client.request({ method: 'eth_estimateGas', params: [{"from": "0x9e7c5e3e3a3b8e1aa0e2d4c7f9d4b0c8b8d5f1a2", "to": "0xd85498dbeaeb1df24be52eed4f52eac2fbd56245", "value": "0x16345785d8a0000"}] });
console.log(result);

Previouseth_chainId - opBNB Nexteth_feeHistory - opBNB

Last updated 21 days ago

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