eth_estimateGas

POST

wss://base.nownodes.io/wss/{api_key}

Generates and returns an estimate of how much gas is necessary to allow the transaction to complete. The transaction will not be added to the blockchain. Note that the estimate may be significantly more than the amount of gas actually used by the transaction, for a variety of reasons including EVM mechanics and node performance.

Connection URL:

Copied!

wss://base.nownodes.io/wss/{{api_key}}

Open the connection, then send the message below as a text frame.

Example:

Copied!

wscat -c 'wss://base.nownodes.io/wss/YOUR_API_KEY'
> {"jsonrpc":"2.0","method":"eth_estimateGas","params":[{"to":"0xd46e8dd67c5d32be8058bb8eb970870f07244567"},"latest"],"id":1}

Body

application/json

object

Parameters

api_keystringrequiredpath

Your NOWNodes API key.

Response

200OK

A successful response.

eth_estimateGas

curl -X POST 'wss://base.nownodes.io/wss/{api_key}' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_estimateGas",
    "params": [
      {
        "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567"
      },
      "latest"
    ],
    "id": 1
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("wss://base.nownodes.io/wss/{api_key}");
const result = await provider.send("eth_estimateGas", [
  {
    "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567"
  },
  "latest"
]);
console.log(result);

require 'eth'
require 'json'
require 'net/http'

uri = URI('wss://base.nownodes.io/wss/{api_key}')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "eth_estimateGas",
  "params": [
    {
      "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567"
    },
    "latest"
  ],
  "id": 1
}'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) do |http|
  http.request(request)
end

puts JSON.parse(response.body)

from web3 import Web3

w3 = Web3(Web3.HTTPProvider("wss://base.nownodes.io/wss/{api_key}"))
response = w3.provider.make_request("eth_estimateGas", [
  {
    "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567"
  },
  "latest"
])
print(response)

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("wss://base.nownodes.io/wss/{api_key}"),
});

const result = await client.request({
  method: "eth_estimateGas",
  params: [
  {
    "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567"
  },
  "latest"
],
});

console.log(result);

const endpoint = "wss://base.nownodes.io/wss/{api_key}";
const apiKey = "YOUR_API_KEY";

async function nownodesRequest(payload) {
  const response = await fetch(endpoint, {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "api-key": apiKey,
    },
    body: JSON.stringify(payload),
  });

  return response.json();
}

const result = await nownodesRequest({ jsonrpc: "2.0", method: "eth_estimateGas", params: [
  {
    "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567"
  },
  "latest"
], id: 1 });
console.log(result);

const response = await fetch('wss://base.nownodes.io/wss/{api_key}', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "jsonrpc": "2.0",
      "method": "eth_estimateGas",
      "params": [
        {
          "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567"
        },
        "latest"
      ],
      "id": 1
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "2.0",
  "method": "eth_estimateGas",
  "params": [
    {
      "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567"
    },
    "latest"
  ],
  "id": 1
}

response = requests.post('wss://base.nownodes.io/wss/{api_key}', json=payload)
data = response.json()

require 'net/http'
require 'json'

uri = URI('wss://base.nownodes.io/wss/{api_key}')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "jsonrpc": "2.0",
    "method": "eth_estimateGas",
    "params": [
      {
        "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567"
      },
      "latest"
    ],
    "id": 1
  }'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |http| http.request(request) }
data = JSON.parse(response.body)

Request Body

{
  "jsonrpc": "2.0",
  "method": "eth_estimateGas",
  "params": [
    {
      "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567"
    },
    "latest"
  ],
  "id": 1
}

200

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x5208"
}