Skip to main content

​
Geth

Interact with your Base node using Geth.
1
Install Geth.
2
Use geth attach command with the node endpoint.
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.
Example below demonstrates how to get the balance of an address in wei value and convert it to ether value: 
> web3.fromWei(web3.eth.getBalance("0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae"))
642538.078574759898951277

​
GraphQL

You can use GraphQL on a dedicated node on the paid plans.

​
UI

You can query data using the graphical interface.
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.
Example to get the latest block number: 
{
  block {
    number
  }
}

​
node.js

You can build a web app to query data using node.js and axios: 
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();
where
  • 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.
See also Using GraphQL with EVM-compatible nodes.

​
MetaMask

On node access details, click Add to MetaMask.

​
Truffle

Configure Truffle Suite to deploy contracts to your Base nodes.
1
Install Truffle Suite, HD Wallet-enabled Web3 provider, and create a project.
2
Create a new environment in truffle-config.js, add your mnemonic phrase generated by a wallet and the Base endpoint instead of YOUR_CHAINSTACK_ENDPOINT:
const HDWalletProvider = require("@truffle/hdwallet-provider");
const mnemonic = 'pattern enroll upgrade ...';
...
module.exports = {
 networks: {
    chainstack: {
        provider: () => new HDWalletProvider(mnemonic, "YOUR_CHAINSTACK_ENDPOINT"),
        network_id: "*"
    },
   }
  }
};

​
Hardhat

Configure Hardhat to deploy contracts and interact through your Base nodes.
1
Install Hardhat and create a project.
2
Create a new environment in hardhat.config.js:
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.
See also Forking EVM-compatible mainnet with Hardhat.

​
Remix IDE

To make Remix IDE interact with the network through a Chainstack node:
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.
This will engage MetaMask and make Remix IDE interact with the network through a Chainstack node. For a detailed tutorial with Remix IDE, see Trust fund account with Remix.

​
web3.js

Build DApps using web3.js and Base nodes deployed with Chainstack.
1
Install web3.js.
2
Connect over HTTP or WebSocket.

​
HTTP

Use the HttpProvider object to connect to your node HTTPS endpoint and get the latest block number: 
const Web3 = require("web3");

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

web3.eth.getBlockNumber().then(console.log);
where YOUR_CHAINSTACK_ENDPOINT is your node HTTPS endpoint protected either with the key or password

​
WebSocket

Use the WebsocketProvider object to connect to your node WSS endpoint and get the latest block number: 
const Web3 = require("web3");

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

web3.eth.getBlockNumber().then(console.log);
where YOUR_CHAINSTACK_ENDPOINT is your node WSS endpoint protected either with the key or password

​
web3.py

Build DApps using web3.py and Base nodes deployed with Chainstack.
1
Install web3.py.
2
Connect over HTTP or WebSocket. See also EVM node connection: HTTP vs WebSocket.

​
HTTP

Use the HTTPProvider to connect to your node endpoint and get the latest block number: 
from web3 import Web3

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

from web3 import Web3

web3 = Web3(Web3.HTTPProvider('https://%s:%s@%s'% ("USERNAME", "PASSWORD", "HOSTNAME")))
print(web3.eth.blockNumber)
where
  • 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)
See also node access details.

​
WebSocket

Use the WebsocketProvider object to connect to your node WSS endpoint and get the latest block number: 
from web3 import Web3

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

from web3 import Web3

web3 = Web3(Web3.WebsocketProvider('wss://%s:%s@%s'% ("USERNAME", "PASSWORD", "HOSTNAME")))
print(web3.eth.blockNumber)
where
  • 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)
See also node access details. See also WebSocket connection to an EVM node.

​
web3.php

Build DApps using web3.php and Base nodes deployed with Chainstack.
1
Install web3.php.
2
Connect over HTTP:
<?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:
<?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

Build DApps using web3j and Base nodes deployed with Chainstack. Use the HttpService object to connect to your node endpoint. Example to get the latest block number: 
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);
    }
  }

}
where
  • 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)
See also the full code on GitHub.

​
ethers.js

Build DApps using ethers.js and Base nodes deployed with Chainstack.
1
Install ethers.js.
2
Connect over HTTP or WebSocket. See also EVM node connection: HTTP vs WebSocket.

​
HTTP

Use the JsonRpcProvider object to connect to your node endpoint and get the latest block number: 
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);
where
  • 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
See also node access details.

​
WebSocket

Use the WebSocketProvider object to connect to your node WSS endpoint and get the latest block number: 
const { ethers } = require("ethers");

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

provider.getBlockNumber().then(console.log);
where
  • 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
See also node access details.

​
Brownie

1
Install Brownie.
2
Use the brownie networks add command with the node endpoint. For example, Base mainnet:
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
Example to run the deployment script: 
brownie run deploy.py --network chainstack-mainnet

​
Foundry

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

​
Forge

Use forge to develop, test, and deploy your smart contracts. To deploy a contract: 
forge create CONTRACT_NAME --contracts CONTRACT_PATH --private-key YOUR_PRIVATE_KEY --rpc-url YOUR_CHAINSTACK_ENDPOINT
where
  • 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

Use cast to interact with the network and the deployed contracts. To get the latest block number: 
cast block-number --rpc-url YOUR_CHAINSTACK_ENDPOINT
where YOUR_CHAINSTACK_ENDPOINT is your node HTTPS endpoint protected either with the key or password