Estimate transaction gas

POST

https://sei-evm.nownodes.io/

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Estimates the gas required to execute a transaction request.

Body

application/json

JSON-RPC request for eth_estimateGas.

jsonrpcstring2.0required

JSON-RPC protocol version.

methodstringeth_estimateGasrequired

JSON-RPC method name.

paramsArray<object>required

Ordered method parameters.

Show child attributes

fromstring

Sender address.

tostring

Recipient address.

valuestring

Transferred value.

idintegerrequired

Client-selected request identifier.

Response

200OK

Response captured from the live Sei EVM endpoint.

400Bad Request

Invalid request or unavailable result.

Estimate transaction gas

curl -X POST 'https://sei-evm.nownodes.io/' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "eth_estimateGas",
    "params": [
      {
        "from": "0x18d7c61826cdadc62bdfcef401d0cd5c69f3e945",
        "to": "0x18d7c61826cdadc62bdfcef401d0cd5c69f3e945",
        "value": "0x0"
      }
    ]
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://sei-evm.nownodes.io/");
const result = await provider.send("eth_estimateGas", [
  {
    "from": "0x18d7c61826cdadc62bdfcef401d0cd5c69f3e945",
    "to": "0x18d7c61826cdadc62bdfcef401d0cd5c69f3e945",
    "value": "0x0"
  }
]);
console.log(result);

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

uri = URI('https://sei-evm.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "eth_estimateGas",
  "params": [
    {
      "from": "0x18d7c61826cdadc62bdfcef401d0cd5c69f3e945",
      "to": "0x18d7c61826cdadc62bdfcef401d0cd5c69f3e945",
      "value": "0x0"
    }
  ],
  "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://sei-evm.nownodes.io/"))
response = w3.provider.make_request("eth_estimateGas", [
  {
    "from": "0x18d7c61826cdadc62bdfcef401d0cd5c69f3e945",
    "to": "0x18d7c61826cdadc62bdfcef401d0cd5c69f3e945",
    "value": "0x0"
  }
])
print(response)

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://sei-evm.nownodes.io/"),
});

const result = await client.request({
  method: "eth_estimateGas",
  params: [
  {
    "from": "0x18d7c61826cdadc62bdfcef401d0cd5c69f3e945",
    "to": "0x18d7c61826cdadc62bdfcef401d0cd5c69f3e945",
    "value": "0x0"
  }
],
});

console.log(result);

const endpoint = "https://sei-evm.nownodes.io/";
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: [
  {
    "from": "0x18d7c61826cdadc62bdfcef401d0cd5c69f3e945",
    "to": "0x18d7c61826cdadc62bdfcef401d0cd5c69f3e945",
    "value": "0x0"
  }
], id: 1 });
console.log(result);

const response = await fetch('https://sei-evm.nownodes.io/', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "jsonrpc": "2.0",
      "id": 1,
      "method": "eth_estimateGas",
      "params": [
        {
          "from": "0x18d7c61826cdadc62bdfcef401d0cd5c69f3e945",
          "to": "0x18d7c61826cdadc62bdfcef401d0cd5c69f3e945",
          "value": "0x0"
        }
      ]
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "2.0",
  "id": 1,
  "method": "eth_estimateGas",
  "params": [
    {
      "from": "0x18d7c61826cdadc62bdfcef401d0cd5c69f3e945",
      "to": "0x18d7c61826cdadc62bdfcef401d0cd5c69f3e945",
      "value": "0x0"
    }
  ]
}

response = requests.post('https://sei-evm.nownodes.io/', json=payload)
data = response.json()

require 'net/http'
require 'json'

uri = URI('https://sei-evm.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "eth_estimateGas",
    "params": [
      {
        "from": "0x18d7c61826cdadc62bdfcef401d0cd5c69f3e945",
        "to": "0x18d7c61826cdadc62bdfcef401d0cd5c69f3e945",
        "value": "0x0"
      }
    ]
  }'

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": [
    {
      "from": "0x18d7c61826cdadc62bdfcef401d0cd5c69f3e945",
      "to": "0x18d7c61826cdadc62bdfcef401d0cd5c69f3e945",
      "value": "0x0"
    }
  ]
}

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

{
  "jsonrpc": "string",
  "id": 0,
  "error": {}
}