I have a problem with using : web3.net.listening The case when I am connected to the testRPC is working and it returns me TRUE. But the case I am not connected it returns me INTERNAL SERVER ERROR. I understand that this "listening" object doesn't exist when I am no longuer connected to testRPC. How can I solve this? so I can get false as result if testrpc not connected.

const config = require('config');
const Router = require('koa-router');
const router = new Router();

const Web3 = require('web3');
const web3 = new Web3();
web3.setProvider(new web3.providers.HttpProvider(config.provider.url));

router.get('/cbn/provider-status', ctx => {

    const listening = web3.net.listening;
    if (listening){
        ctx.body = {"status":listening}
    else ctx.body = {"status":"false"}


Many Thanks in advance.

  • 1
    you can use web3.isConnected() to check if connection to node exists or not.
    – kherwa
    May 16, 2018 at 9:47

1 Answer 1


Here is the answer for that issue:

router.get('/cbn/provider-status', ctx => {
    ctx.body = {"status":web3.isConnected()}

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