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Start Making Requests

In this section, we'll create a simple script using Ethereum Mainnet RPC and Web3.js library to make requests.

1) Create a new project directory

mkdir eth-requests && cd eth-requests

2) Install web3.js library

  • Libraries simplify connecting an application to the Ethereum blockchain. You need to connect to Ethereum in order to read blockchain data and/or send transactions to the network.*
npm install web3

3) Create a landing page for your file and open it in your preferred code editor.

touch index.js

4) Now add the script below to index.js. The script does the following:

  • Creates a web3 instance,
  • Sets the provider to an Chain Protocol RPC
  • Makes a request to get the latest Block Number.
const Web3 = require('web3');
const web3 = new Web3("https://apigw-dev.chainprtcl.net/eth"); // For Premium endpoints append API key to url "https://api-us.chainprtcl.net/eth/APIKEY"
web3.eth.getBlockNumber()
.then(console.log);

5) Run the script in your code editor or in terminal/command-line.

You should see the latest Block Number as below!!!

node index.js
14679276