Base tooling

​

Geth

1. Install Geth.
2. Use geth attach command with the node endpoint.
   Shell

   Copy

   geth attach YOUR_CHAINSTACK_ENDPOINT
   

   where YOUR_CHAINSTACK_ENDPOINT — your node HTTPS or WSS endpoint protected either with the key or password. See node access details.
3. Invoke any methods from Web3 JavaScript API.

> web3.fromWei(web3.eth.getBalance("0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae"))
642538.078574759898951277

​

GraphQL

​

UI

1. On Chainstack, navigate to your dedicated Base node. See node access details.
2. Hover over GraphQL IDE URL and click Open.
3. In the graphical interface that opens, run a GraphQL query.

{
  block {
    number
  }
}

​

node.js

const axios = require("axios");
const main = async () => {
  try {
    const result = await axios.post("YOUR_CHAINSTACK_ENDPOINT", {
      query: `
          { block { number } }
        `,
    });
    console.log(result.data);
  } catch (error) {
    console.error(error);
  }
};
main();

• YOUR_CHAINSTACK_ENDPOINT — your node GraphQL endpoint protected either with the key or password. See node access details.
• query — your GraphQL query. In this case, to get the latest block number.

​

MetaMask

​

Hardhat

1. Install Hardhat and create a project.
2. Create a new environment in hardhat.config.js:
   Javascript

   Copy

   require("@nomiclabs/hardhat-waffle");
   ...
   module.exports = {
     solidity: "0.7.3",
     networks: {
       chainstack: {
           url: "YOUR_CHAINSTACK_ENDPOINT",
           accounts: ["YOUR_PRIVATE_KEY"]
       },
     }
   };
   

   where
   • YOUR_CHAINSTACK_ENDPOINT — your node HTTPS or WSS endpoint protected either with the key or password. See node access details.
   • YOUR_PRIVATE_KEY — the private key of the account that you use to deploy the contract
3. Run npx hardhat run scripts/deploy.js --network chainstack and Hardhat will deploy using Chainstack.

​

Remix IDE

1. Get MetaMask and set it to interact through a Chainstack node. See Interacting through MetaMask.
2. In Remix IDE, navigate to the Deploy tab. Select Injected Provider - MetaMask in Environment.

​

web3.js

1. Install web3.js.
2. Connect over HTTP or WebSocket.

​

HTTP

const Web3 = require("web3");

const web3 = new Web3(
  new Web3.providers.HttpProvider("YOUR_CHAINSTACK_ENDPOINT")
);

web3.eth.getBlockNumber().then(console.log);

​

WebSocket

const Web3 = require("web3");

const web3 = new Web3(
  new Web3.providers.WebsocketProvider("YOUR_CHAINSTACK_ENDPOINT")
);

web3.eth.getBlockNumber().then(console.log);

​

web3.py

1. Install web3.py.
2. Connect over HTTP or WebSocket. See also EVM node connection: HTTP vs WebSocket.

​

HTTP

from web3 import Web3

web3 = Web3(Web3.HTTPProvider('YOUR_CHAINSTACK_ENDPOINT'))
print(web3.eth.block_number)

from web3 import Web3

web3 = Web3(Web3.HTTPProvider('https://%s:%s@%s'% ("USERNAME", "PASSWORD", "HOSTNAME")))
print(web3.eth.block_number)

• YOUR_CHAINSTACK_ENDPOINT — your node HTTPS endpoint protected either with the key or password
• HOSTNAME — your node HTTPS endpoint hostname
• USERNAME — your node access username (for password-protected endpoints)
• PASSWORD — your node access password (for password-protected endpoints)

​

WebSocket

from web3 import Web3

web3 = Web3(Web3.WebsocketProvider('YOUR_CHAINSTACK_ENDPOINT'))
print(web3.eth.block_number)

from web3 import Web3

web3 = Web3(Web3.WebsocketProvider('wss://%s:%s@%s'% ("USERNAME", "PASSWORD", "HOSTNAME")))
print(web3.eth.block_number)

• YOUR_CHAINSTACK_ENDPOINT — your node WSS endpoint protected either with the key or password
• HOSTNAME — your node WSS endpoint hostname
• USERNAME — your node access username (for password-protected endpoints)
• PASSWORD — your node access password (for password-protected endpoints)

​

web3.php

1. Install web3.php.
2. Connect over HTTP:
   Php

   Copy

   <?php
   
   require_once "vendor/autoload.php";
   
   use Web3\Web3;
   use Web3\Providers\HttpProvider;
   use Web3\RequestManagers\HttpRequestManager;
   
   $web3 = new Web3(new HttpProvider(new HttpRequestManager("YOUR_CHAINSTACK_ENDPOINT", 5)));
   ?>
   

   where YOUR_CHAINSTACK_ENDPOINT is your node HTTPS endpoint protected either with the key or password
3. Use JSON-RPC methods to interact with the node. Example to get the latest block number:
   Key Protected

   Copy

   <?php
   
   require_once "vendor/autoload.php";
   
   use Web3\Web3;
   use Web3\Providers\HttpProvider;
   use Web3\RequestManagers\HttpRequestManager;
   
   $web3 = new Web3(new HttpProvider(new HttpRequestManager("YOUR_CHAINSTACK_ENDPOINT, 5)));
   
   $eth = $web3->eth;
   
   $eth->blockNumber(function ($err, $data) {
        print "$data \n";
   });
   ?>
   

​

web3j

package getLatestBlock;

import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.web3j.protocol.Web3j;
import org.web3j.protocol.core.DefaultBlockParameterName;
import org.web3j.protocol.core.methods.response.EthBlock;
import org.web3j.protocol.exceptions.ClientConnectionException;
import org.web3j.protocol.http.HttpService;

import okhttp3.Authenticator;
import okhttp3.Credentials;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import okhttp3.Route;

public final class App {

  private static final String USERNAME = "USERNAME";
  private static final String PASSWORD = "PASSWORD";
  private static final String ENDPOINT = "ENDPOINT";

  public static void main(String[] args) {
    try {

      OkHttpClient.Builder clientBuilder = new OkHttpClient.Builder();
      clientBuilder.authenticator(new Authenticator() {
          @Override public Request authenticate(Route route, Response response) throws IOException {
              String credential = Credentials.basic(USERNAME, PASSWORD);
              return response.request().newBuilder().header("Authorization", credential).build();
          }
      });

      HttpService service = new HttpService(RPC_ENDPOINT, clientBuilder.build(), false);
      Web3j web3 = Web3j.build(service);

      EthBlock.Block latestBlock = web3.ethGetBlockByNumber(DefaultBlockParameterName.LATEST, false).send().getBlock();

      System.out.println("Latest Block: #" + latestBlock.getNumber());

    } catch (IOException | ClientConnectionException ex) {

      Logger.getLogger(App.class.getName()).log(Level.SEVERE, null, ex);
    }
  }

}

• ENDPOINT — your node HTTPS endpoint protected either with the key or password
• USERNAME — your node access username (for password-protected endpoints)
• PASSWORD — your node access password (for password-protected endpoints)

​

ethers.js

1. Install ethers.js.
2. Connect over HTTP or WebSocket. See also EVM node connection: HTTP vs WebSocket.

​

HTTP

const { ethers } = require("ethers");

var urlInfo = {
  url: "YOUR_CHAINSTACK_ENDPOINT",
};
var provider = new ethers.providers.JsonRpcProvider(urlInfo, NETWORK_ID);

provider.getBlockNumber().then(console.log);

const { ethers } = require("ethers");

var urlInfo = {
  url: "YOUR_CHAINSTACK_ENDPOINT",
  user: "USERNAME",
  password: "PASSWORD",
};
var provider = new ethers.providers.JsonRpcProvider(urlInfo, NETWORK_ID);

provider.getBlockNumber().then(console.log);

• YOUR_CHAINSTACK_ENDPOINT — your node HTTPS endpoint protected either with the key or password
• USERNAME — your node access username (for password-protected endpoints)
• PASSWORD — your node access password (for password-protected endpoints)
• NETWORK_ID — Base network ID:
  • Mainnet: 8453
  • Goerli Testnet: 84531

​

WebSocket

const { ethers } = require("ethers");

const provider = new ethers.providers.WebSocketProvider(
  "YOUR_CHAINSTACK_ENDPOINT",
  NETWORK_ID
);

provider.getBlockNumber().then(console.log);

• YOUR_CHAINSTACK_ENDPOINT — your node WSS endpoint endpoint protected either with the key or password
• NETWORK_ID — Base network ID:
  • Mainnet: 8453
  • Goerli Testnet: 84531

​

Brownie

1. Install Brownie.
2. Use the brownie networks add command with the node endpoint. For example, Base mainnet:
   Shell

   Copy

   brownie networks add Base ID name="NETWORK_NAME" host= YOUR_CHAINSTACK_ENDPOINT chainid=NETWORK_ID
   

   where
   • ID — any name that you will use as the network tag to run a deployment. For example, chainstack-mainnet.
   • NETWORK_NAME — any name that you want to identify the network by in the list of networks. For example, Mainnet (Chainstack).
   • YOUR_CHAINSTACK_ENDPOINT — your node HTTPS or WSS endpoint protected either with the key or password
   • NETWORK_ID — Base network ID:
     • Mainnet: 8453
     • Goerli Testnet: 84531

brownie run deploy.py --network chainstack-mainnet

​

Foundry

1. Install Foundry.
2. Use --rpc-url to run the operation through your Chainstack node.

​

Forge

forge create CONTRACT_NAME --contracts CONTRACT_PATH --private-key YOUR_PRIVATE_KEY --rpc-url YOUR_CHAINSTACK_ENDPOINT

• CONTRACT_NAME — name of the contract in the Solidity source code
• CONTRACT_PATH — path to your smart contract
• YOUR_PRIVATE_KEY — the private key to your funded account that you will use to deploy the contract.
• YOUR_CHAINSTACK_ENDPOINT — your node HTTPS endpoint protected either with the key or password

​

Cast

cast block-number --rpc-url YOUR_CHAINSTACK_ENDPOINT