Recently, ethers.js has introduced the ChainstackProvider, a new addition to its Community Providers.
Chainstack provider on the ethers.js documentation .
ChainstackProviderintegrates directly withethers.js, enabling developers to connect seamlessly to multiple blockchain networks supported by Chainstack via JSON-RPC endpoints. The ChainstackProvider enhances the development of decentralized applications by offering robust and scalable connections to blockchain networks such as Ethereum Mainnet, Arbitrum, BNB Smart Chain Mainnet, and Polygon.

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Supported Networks

ChainstackProvider supports connections to:
  • Ethereum Mainnet (mainnet)
  • Arbitrum (arbitrum)
  • BNB Smart Chain Mainnet (bnb)
  • Polygon (matic)

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Class Overview

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ChainstackProvider

The ChainstackProvider extends JsonRpcProvider and implements the CommunityResourcable interface. It allows users to connect to Chainstack’s JSON-RPC endpoints. This provider is particularly useful for developers needing reliable network access to test and prototype blockchain applications.
A default, highly-throttled node is used by default. Deploy a high performance node and use your authorization key to increase performance.

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Constructor

JavaScript
new ChainstackProvider(network?: Networkish, apiKey?: null | string)
Parameters:
  • network: Optional. The network identifier.
  • apiKey: Optional. The authorization key from your deployed Chainstack node.

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Getting Started

To start using the ChainstackProvideryou must first install ethers.js:
Bash
npm install ethers

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Example Usage

Here’s an example of creating a ChainstackProvider instance and call the eth_chainId method:
ethers.js
const ethers = require("ethers");

// Create a ChainstackProvider instance for Ethereum mainnet
const chainstack = new ethers.ChainstackProvider("mainnet");

const chainId = async () => {
  // This will return the value in Hex
  const chainId = await chainstack.send("eth_chainId");
  console.log(\`Hex Chain ID: ${chainId}\`);
};

chainId();

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API Key Configuration

For better performance and higher rate limits, deploy a node from Chainstack and use its authorization key to instantiate theChainstackProvider. Follow these steps to sign up on Chainstack, deploy a node, and find your endpoint credentials:
1

Sign up with Chainstack.
2

Deploy a node.
3

View node access and credentials.
You must deploy a Global Node to use the authorization key in ChainstackProvider.
Once deployed, your node RPC ULR will look like this:
https://ethereum-mainnet.core.chainstack.com/AUTH_KEY
Now you can add the AUTH_KEY to the ChainstackProvider instance:
ethers.js
const ethers = require("ethers");

// Create a ChainstackProvider instance for Ethereum mainnet
const chainstack = new ethers.ChainstackProvider("mainnet", "AUTH_KEY");