eth_estimateGas

POST

https://avax.nownodes.io/ext/bc/C/rpc/

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Changed. The estimate now includes the minimum gas limit that the mempool requires for a transaction of this size. For large transactions (big calldata) the returned value can be higher than before; previously a transaction signed with the estimate could be rejected with insufficient gas limit for tx size. The response format is unchanged.

Estimate the gas required for a transaction.

Body

application/json

jsonrpcstring2.0required

idinteger | stringrequired

methodstringeth_estimateGasrequired

paramsobjectrequired

Response

200OK

Successful JSON-RPC response

400Bad Request

Invalid JSON-RPC request

401Unauthorized

Missing or invalid API key

429Too Many Requests

Rate limit exceeded

500Internal Server Error

Node or upstream error

eth_estimateGas

curl -X POST 'https://avax.nownodes.io/ext/bc/C/rpc/' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "eth_estimateGas",
    "params": {
      "transaction": {
        "to": "0x0000000000000000000000000000000000000000",
        "data": "0x"
      }
    }
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://avax.nownodes.io/ext/bc/C/rpc/");
const result = await provider.send("eth_estimateGas", {
  "transaction": {
    "to": "0x0000000000000000000000000000000000000000",
    "data": "0x"
  }
});
console.log(result);

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

uri = URI('https://avax.nownodes.io/ext/bc/C/rpc/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "eth_estimateGas",
  "params": {
    "transaction": {
      "to": "0x0000000000000000000000000000000000000000",
      "data": "0x"
    }
  },
  "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("https://avax.nownodes.io/ext/bc/C/rpc/"))
response = w3.provider.make_request("eth_estimateGas", {
  "transaction": {
    "to": "0x0000000000000000000000000000000000000000",
    "data": "0x"
  }
})
print(response)

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://avax.nownodes.io/ext/bc/C/rpc/"),
});

const result = await client.request({
  method: "eth_estimateGas",
  params: {
  "transaction": {
    "to": "0x0000000000000000000000000000000000000000",
    "data": "0x"
  }
},
});

console.log(result);

const endpoint = "https://avax.nownodes.io/ext/bc/C/rpc/";
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: {
  "transaction": {
    "to": "0x0000000000000000000000000000000000000000",
    "data": "0x"
  }
}, id: 1 });
console.log(result);

const response = await fetch('https://avax.nownodes.io/ext/bc/C/rpc/', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "jsonrpc": "2.0",
      "id": 1,
      "method": "eth_estimateGas",
      "params": {
        "transaction": {
          "to": "0x0000000000000000000000000000000000000000",
          "data": "0x"
        }
      }
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "2.0",
  "id": 1,
  "method": "eth_estimateGas",
  "params": {
    "transaction": {
      "to": "0x0000000000000000000000000000000000000000",
      "data": "0x"
    }
  }
}

response = requests.post('https://avax.nownodes.io/ext/bc/C/rpc/', json=payload)
data = response.json()

require 'net/http'
require 'json'

uri = URI('https://avax.nownodes.io/ext/bc/C/rpc/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "eth_estimateGas",
    "params": {
      "transaction": {
        "to": "0x0000000000000000000000000000000000000000",
        "data": "0x"
      }
    }
  }'

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",
  "id": 1,
  "method": "eth_estimateGas",
  "params": {
    "transaction": {
      "to": "0x0000000000000000000000000000000000000000",
      "data": "0x"
    }
  }
}

200

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