eth_createAccessList

Create Access List

POSThttps://site1.moralis-nodes.com/:chain/:apiKey

This example demonstrates generating an access list for a hypothetical transaction that interacts with a contract. The access list helps in optimizing gas costs for transactions by pre-specifying accounts and storage keys the transaction intends to access.

Note

Please refer to RPC schema page for more details on the RPC params and RPC response definitions of the RPC method.

PATH PARAMS

chainstringrequired

The blockchain to interact with. In this example, 'eth' is used to denote Ethereum Mainnet.

ethholeskypolygonpolygon amoybscbsc testnetarbitrumarbitrum sepoliaoptimismoptimism testnetbasebase sepolia

apiKeystringrequired

Your API key for authentication. Replace 'YOUR_API_KEY' with your actual Moralis API key.

BODY PARAM

Request Bodyobjectrequired

The request payload for generating an access list based on a transaction object.

{ "jsonrpc": "2.0", "id": 1, "method": "eth_createAccessList" }

Responses

200Successful response with the generated access list and gas used.

400Bad Request

404Not Found

429Too Many Requests

500Internal Server Error

cURL

curl --request POST \
     --url 'https://site1.moralis-nodes.com/eth/YOUR_API_KEY' \
     --header 'accept: application/json' \
     --header 'content-type: application/json' \
     --data '
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "eth_createAccessList"
}
'

Node.js

// Node.js v18+ has native fetch support
// No additional dependencies required

const options = {
  method: 'POST',
  headers: {
    accept: 'application/json',
    'content-type': 'application/json'
  },
  body: JSON.stringify({
    "jsonrpc": "2.0",
    "id": 1,
    "method": "eth_createAccessList"
  })
};

fetch('https://site1.moralis-nodes.com/eth/YOUR_API_KEY', options)
  .then(response => response.json())
  .then(response => console.log(response))
  .catch(err => console.error(err));

Python

# Dependencies to install:
# $ python -m pip install requests

import requests

url = "https://site1.moralis-nodes.com/eth/YOUR_API_KEY"

payload = {
  "jsonrpc": "2.0",
  "id": 1,
  "method": "eth_createAccessList"
}
headers = {
  "Accept": "application/json",
  "Content-Type": "application/json"
}

response = requests.request("POST", url, json=payload, headers=headers)

print(response.text)

Go

package main

import (
  "fmt"
  "strings"
  "net/http"
  "io"
)

func main() {

  url := "https://site1.moralis-nodes.com/eth/YOUR_API_KEY"

  payload := strings.NewReader("{\"jsonrpc\":\"2.0\",\"id\":1,\"method\":\"eth_createAccessList\"}")

  req, _ := http.NewRequest("POST", url, payload)

  req.Header.Add("Accept", "application/json")
  req.Header.Add("Content-Type", "application/json")

  res, _ := http.DefaultClient.Do(req)

  defer res.Body.Close()
  body, _ := io.ReadAll(res.Body)

  fmt.Println(res)
  fmt.Println(string(body))

}

PHP

<?php
// Dependencies to install:
// $ composer require guzzlehttp/guzzle

require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://site1.moralis-nodes.com/eth/YOUR_API_KEY', [
  'body' => '{"jsonrpc":"2.0","id":1,"method":"eth_createAccessList"}',
  'headers' => [
    'Accept' => 'application/json',
    'Content-Type' => 'application/json',
  ],
]);

echo $response->getBody();

Response Example

200 Successful response with the generated access list and gas used.

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "accessList": [
      ""
    ],
    "gasUsed": "0x5208"
  }
}