web3.js 中的连接超时

Question

When instantiating a Web3 instance, I can pass provider options, including the timeout, eg:

const w3 = new Web3(new Web3.providers.HttpProvider('...', {timeout: 10e3}));

But seems like it doesn't affect the isListening call, when I'm trying to connect to an unhealthy node and checking if it's listening:

await w3.eth.net.isListening();

is waiting for way more than the timeout I specify.

Why is it like that? How can I force the timeout there?

Answer 1

You can use Promise.race() to have a second promise that is tied to a timeout.

await Promise.race([
    web3.eth.net.isListening(),
    new Promise(function(resolve, reject) {
        setTimeout(function() {
            reject("Time out");
        }, 10e3);
    })
]);