JavaScript array is stuck in pending

Question

I have a problem where the JavaScript array is stuck in pending. Is this because there are too many requests?

const removeBots = async(arr) => {
  try {
    for (let i = 0; i < arr.length; i++) {
      console.log(i)
      axios.get(`https://api.etherscan.io/api?module=account&action=txlist&address=${arr[i]}&apikey=${apiKey}`)
        .then(res => console.log(res.data.result.length))
    }
    console.log("Done");
    console.log(walletsFinal);
  } catch (e) {
    console.log("error", e)
  }
}

Edit- I noticed the formatting problem with the backticks and fixed it. I'm trying to get around the issue where I'm getting rate limited of 5 calls per second for the API.

What do you mean by "stuck in pending"? Do you mean the AJAX calls? — Barmar, Jul 21 '21 at 19:22
Since you haven't used `await` when calling `axios.get()`, your loop should finish immediately without waiting for the AJAX requests to complete. — Barmar, Jul 21 '21 at 19:24
@Barmar there's no await, but OP used .then syntax, so that shouldn't be the problem. — Voodu, Jul 21 '21 at 19:50
@EKattalog that's not answer to your question, but you have wrong quotes in `axios.get` line. If you want to use template strings, you should use backticks (`) instead of current single quotes. Maybe that causes some problems with the request — Voodu, Jul 21 '21 at 19:53
@Voodu Using `.then()` makes the `console.log()` wait for the response, but it doesn't make the loop wait. — Barmar, Jul 21 '21 at 19:58
never heard about an array being stuck. well, there's a first for everything — Mihai T, Jul 22 '21 at 18:13

score 0 · Answer 1 · answered Jul 22 '21 at 18:11

If your problem is that you're being ratelimited to 5 api calls/second, then just wait 200ms (250ms to be safe) between each call.

// https://stackoverflow.com/a/39914235/12101554
const sleep = (ms) => new Promise(resolve => setTimeout(resolve, ms));

const removeBots = async(arr) => {
  try {
    for (let i = 0; i < arr.length; i++) {
      console.log(i)
      const res = await axios.get(`https://api.etherscan.io/api?module=account&action=txlist&address=${arr[i]}&apikey=${apiKey}`);
      console.log(res.data.result.length);
      await sleep(250);
    }
    console.log("Done");
    console.log(walletsFinal);
  } catch (e) {
    console.log("error", e)
  }
}

JavaScript array is stuck in pending

1 Answers1