Cannot watch any event on Ropsten

Question

I'm not able to watch and log event sent by smart contract using the Ropsten test network. The same code works on local test network.

Contract Event code:

event CreateOptionEvent(address indexed _who, uint256 indexed _date, uint256 indexed _id);

function createOption( ...PARAMS HERE... ){

    [...]

    emit CreateOptionEvent(msg.sender, now, optionId);
}

Web app event code:

createEvent = myContractInstance.CreateOptionEvent({ fromBlock: 0, toBlock: 'latest' })
createEvent.watch((err, result) => {
    if (err) {
        console.log(err)
        return;
    }
    console.log(result.args._id)
})

After I correctly create an option (transaction success on metamask) nothing is logged.

What should I try to do?

-> % truffle version 
Truffle v4.1.11 (core: 4.1.11) 
Solidity v0.4.24 (solc-js)

Answer 1

You can subscribe to events as shown in Web3 documentation. Also you would need to create new instance with websocket provider for it (for example wss://ropsten.infura.io/ws) as MetaMask doesn't support websockets i believe.