web3-providers-http

Connecting to an Ethereum Node

This feature allows you to connect to an Ethereum node using an HTTP provider. The code sample demonstrates how to create a new Web3 instance and connect it to a local Ethereum node running on port 8545.

const Web3 = require('web3');
const web3 = new Web3(new Web3.providers.HttpProvider('http://localhost:8545'));
console.log('Connected to Ethereum node:', web3.currentProvider.host);

Sending JSON-RPC Requests

This feature allows you to send JSON-RPC requests to the Ethereum node. The code sample demonstrates how to get the latest block number from the connected Ethereum node.

const Web3 = require('web3');
const web3 = new Web3(new Web3.providers.HttpProvider('http://localhost:8545'));
web3.eth.getBlockNumber().then(console.log);

Handling Errors

This feature allows you to handle errors that may occur when sending JSON-RPC requests. The code sample demonstrates how to catch and log errors when trying to get the latest block number.

const Web3 = require('web3');
const web3 = new Web3(new Web3.providers.HttpProvider('http://localhost:8545'));
web3.eth.getBlockNumber().then(console.log).catch(console.error);