What version of web3 do I need to use infura to listen to events?

mcplums · November 30, 2018, 2:30pm

I heard that infura requires web3 v1.0 or higher to subscribe to events, is this still the case?

wuehler · November 30, 2018, 2:54pm

You do need to use websockets to subscribe to events. See more here including code samples:

github.com/INFURA/infura

Does Infura support the Web3.js 1.0 API?

opened 09:35AM - 11 Aug 17 UTC

closed 05:51PM - 14 Feb 18 UTC

lukehedger

Using `web3@1.0.0-beta.18` I have attempted to deploy a contract to Rinkeby with… a single argument: ``` myContract.deploy({ arguments: [ 123 ] }) ``` The contract deploys OK but when calling a method to return the constructor argument, `0` is returned, which suggests the argument was not processed. ``` myContract.methods.echo().call({ from: fromAccount }) .then( res => console.log(res) ) //=> 0 ``` The contract is here for ref: ``` pragma solidity ^0.4.0; contract Echo { uint value; function Echo(uint _value) { value = _value; } function echo() constant returns (uint) { return value; } } ```

mcplums · November 30, 2018, 2:54pm

Thank you. I have no idea what websockets are (I’m a noob just starting out) but I will try and tackle that page you linked and see where I end up!

mcplums · November 30, 2018, 2:55pm

By the way, the implication in your answer is that web3 v1 is required for websockets, is this correct?

mike · November 30, 2018, 6:29pm

Infura’s websockets support web3.js 1.0, check out the docs here, https://infura.io/docs/ethereum/wss/introduction, for more info.

Chain-Doe · February 17, 2023, 7:29pm