How to use Infura.io with Web3.js 1.0

• HTTP provider is deprecated in Web3.js 1.0.
• Websocket provider needs to be used instead of HTTP provider.
• Infura HTTP provider URL: https://mainnet.infura.io
• Infura Websocket URL: wss://mainnet.infura.io/ws

In Web3.js 1.0, Web3 needs to be initialized as below.

var web3 = new Web3('wss://mainnet.infura.io/ws');

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