> ## Documentation Index
> Fetch the complete documentation index at: https://docs.chainstack.com/llms.txt
> Use this file to discover all available pages before exploring further.

<AgentInstructions>

## Submitting Feedback

If you encounter incorrect, outdated, or confusing documentation on this page, submit feedback:

POST https://docs.chainstack.com/feedback

```json
{
  "path": "/docs/polygon-tooling",
  "feedback": "Description of the issue"
}
```

Only submit feedback when you have something specific and actionable to report.

</AgentInstructions>

# Polygon tooling

> Set up MetaMask, Hardhat, Foundry, and development tools to build and deploy smart contracts on Polygon PoS through your Chainstack RPC node endpoints.

Get started with a [reliable Polygon RPC endpoint](https://chainstack.com/build-better-with-polygon/) to use the tools below.

## Bor

Interact with your Polygon node using [Bor](https://github.com/maticnetwork/bor).

1. Install [Bor](https://github.com/maticnetwork/bor).

2. Use `geth attach` command with the node endpoint:

   ```shell theme={"system"}
   bor 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](/docs/manage-your-node#view-node-access-and-credentials).

3. Invoke any methods from [Web3 JavaScript API](https://web3js.readthedocs.io/).

   Example below demonstrates how to get the balance of an address in wei value and convert it to ether value:

   ```js theme={"system"}
   > web3.fromWei(web3.eth.getBalance("0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae"))
   642538.078574759898951277
   ```

   You can also use the [Bor client Docker container](https://hub.docker.com/r/maticnetwork/bor).

## GraphQL

You can use GraphQL on a dedicated node on the [paid plans](https://chainstack.com/pricing/).

### UI

You can query data using the graphical interface.

1. On Chainstack, navigate to your dedicated Polygon node. See [node access details](/docs/manage-your-node#view-node-access-and-credentials).
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:

<CodeGroup>
  ```graphql GraphQL theme={"system"}
  { block { number } }
  ```
</CodeGroup>

### Node.js

You can build a web app to query data using node.js and [axios](https://www.npmjs.com/package/axios):

<CodeGroup>
  ```javascript Javascript theme={"system"}
  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();
  ```
</CodeGroup>

* YOUR\_CHAINSTACK\_ENDPOINT — your node GraphQL endpoint protected either with the key or password. See [node access details](/docs/manage-your-node#view-node-access-and-credentials).
* `query` — your GraphQL query. In this case, to get the latest block number.

See also [Using GraphQL with EVM-compatible nodes](https://support.chainstack.com/hc/en-us/articles/4409604331161-Using-GraphQL-with-EVM-compatible-nodes).

## MetaMask

On [node access details](/docs/manage-your-node#view-node-access-and-credentials), click **Connect wallet**.

## Hardhat

Configure [Hardhat](https://hardhat.org/) to deploy contracts and interact through your Polygon nodes.

1. Install [Hardhat](https://hardhat.org/) and create a project.

2. Create a new environment in `hardhat.config.js`:

   ```javascript theme={"system"}
   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](/docs/manage-your-node#view-node-access-and-credentials).
   * 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](https://support.chainstack.com/hc/en-us/articles/900004242406).

## Remix IDE

To make Remix IDE interact with the network through a Chainstack node:

1. Get [MetaMask](https://metamask.io/) and set it to interact through a Chainstack node. See [Interacting through MetaMask](#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.

## web3.js

Build DApps using [web3.js](https://github.com/ethereum/web3.js/) and Polygon nodes deployed with Chainstack.

1. Install [web3.js](https://web3js.readthedocs.io/).
2. Connect over HTTP or WebSocket.

### HTTP

Use the `HttpProvider` object to connect to your node HTTPS endpoint and get the latest block number:

<CodeGroup>
  ```javascript Javascript theme={"system"}
  const Web3 = require('web3');

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

  web3.eth.getBlockNumber().then(console.log);
  ```
</CodeGroup>

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:

<CodeGroup>
  ```javascript Javascript theme={"system"}
  const Web3 = require('web3');

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

  web3.eth.getBlockNumber().then(console.log);
  ```
</CodeGroup>

where YOUR\_CHAINSTACK\_ENDPOINT is your node WSS endpoint protected either with the key or password.

## web3.py

Build DApps using [web3.py](https://github.com/ethereum/web3.py) and Polygon nodes deployed with Chainstack.

1. Install [web3.py](https://web3py.readthedocs.io/).
2. Connect over HTTP or WebSocket. See also [EVM node connection: HTTP vs WebSocket](https://support.chainstack.com/hc/en-us/articles/900002187586-Ethereum-node-connection-HTTP-vs-WebSocket).

### HTTP

Use the `HTTPProvider` to connect to your node endpoint and get the latest block number.

<CodeGroup>
  ```python Key Protected theme={"system"}
  from web3 import Web3

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

  ```python Password Protected theme={"system"}
  from web3 import Web3

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

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](/docs/manage-your-node#view-node-access-and-credentials).

### WebSocket

Use the `WebsocketProvider` object to connect to your node WSS endpoint and get the latest block number.

<CodeGroup>
  ```python Key Protected theme={"system"}
  from web3 import Web3

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

  ```python Password Protected theme={"system"}
  from web3 import Web3

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

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 [WebSocket connection to an EVM node](https://support.chainstack.com/hc/en-us/articles/900001918763-WebSocket-connection-to-an-Ethereum-node).

## web3.php

Build DApps using [web3.php](https://github.com/web3p/web3.php) and Polygon nodes deployed with Chainstack.

1. Install [web3.php](https://github.com/web3p/web3.php).

2. Connect over HTTP:

   ```php theme={"system"}
   <?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](https://eth.wiki/json-rpc/API) to interact with the node.

   Example to get the latest block number:

   ```php theme={"system"}
   <?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](https://github.com/web3j/web3j) and Polygon nodes deployed with Chainstack.

Use the `HttpService` object to connect to your node endpoint.

Example to get the latest block number:

<CodeGroup>
  ```java Java theme={"system"}
  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);
      }
    }

  }
  ```
</CodeGroup>

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](https://github.com/chainstack/web3j-getLatestBlock).

## ethers.js

Build DApps using [ethers.js](https://github.com/ethers-io/ethers.js/) and Polygon nodes deployed with Chainstack.

1. Install [ethers.js](https://www.npmjs.com/package/ethers).
2. Connect over HTTP or WebSocket. See also [EVM node connection: HTTP vs WebSocket](https://support.chainstack.com/hc/en-us/articles/900002187586-Ethereum-node-connection-HTTP-vs-WebSocket).

### HTTP

Use the `JsonRpcProvider` object to connect to your node endpoint and get the latest block number:

<CodeGroup>
  ```javascript Key Protected theme={"system"}
  const { ethers } = require("ethers");

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

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

  ```javascript Password Protected theme={"system"}
  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);
  ```
</CodeGroup>

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 — Polygon network ID:

  * Mainnet: `137`
  * Mumbai testnet: `80001`

See also [node access details](/docs/manage-your-node#view-node-access-and-credentials).

### WebSocket

Use the `WebSocketProvider` object to connect to your node WSS endpoint and get the latest block number:

<CodeGroup>
  ```javascript Javascript theme={"system"}
  const { ethers } = require("ethers");

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

  provider.getBlockNumber().then(console.log);
  ```
</CodeGroup>

where

* YOUR\_CHAINSTACK\_ENDPOINT — your node WSS endpoint endpoint protected either with the key or password

* NETWORK\_ID — Polygon network ID:

  * Mainnet: `137`
  * Mumbai testnet: `80001`

See also [node access details](/docs/manage-your-node#view-node-access-and-credentials).

## Brownie

1. Install [Brownie](https://eth-brownie.readthedocs.io/en/stable/install.html).

2. Use the `brownie networks add` command with the node endpoint:

   ```shell theme={"system"}
   brownie networks add Polygon 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 — Polygon network ID:
     * Mainnet: `137`
     * Mumbai testnet: `80001`
       Example to run the deployment script:

<CodeGroup>
  ```shell Shell theme={"system"}
  brownie run deploy.py --network chainstack-mainnet
  ```
</CodeGroup>

## Foundry

1. Install [Foundry](https://getfoundry.sh/).
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:

<CodeGroup>
  ```shell Shell theme={"system"}
  forge create CONTRACT_NAME --contracts CONTRACT_PATH --private-key YOUR_PRIVATE_KEY --rpc-url YOUR_CHAINSTACK_ENDPOINT
  ```
</CodeGroup>

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:

<CodeGroup>
  ```shell Shell theme={"system"}
  cast block-number --rpc-url YOUR_CHAINSTACK_ENDPOINT
  ```
</CodeGroup>

where YOUR\_CHAINSTACK\_ENDPOINT is your node HTTPS endpoint protected either with the key or password