How to subscribe smartcontract event in Harmony js-sdk?

Smart Contracts
#1 
const hmy = new Harmony(process.env.TESTNET_0_WSS,
{
        chainType: ChainType.Harmony,
        chainId: 2,
})
let instance = hmy.contracts.createContract(abi, address);
instance.events.Deposit()
.on('data', (event) => {
 console.log(event);
})
.on('error', console.error);

process.env.TESTNET_0_WSS=‘wss://ws.s0.b.hmny.io’
=> Always error invoked
Thank your times

#2

Hey Hiro,

Just checked, there is some issue with the testnet ws endpoint. Will fix it as soon as possible and let you know. Sorry for the trouble.

#3

@Hiro, the web socket testnet endpoint should be working now. please try and let us know if you have any further issues.