When requests to Step Function fail, Workflow Service performs exponential backoff retries to notify Step Function service. Number of retries = 3 The total duration of all attempts doesn't exceed 10 seconds, the processing must not exceed the message visibility timeout.

Script
function sleep(seconds) {
    return new Promise(resolve => setTimeout(resolve, seconds * 1000))
}

function listSQS(url, params = {}, retries = 3) {
    return new Promise((resolve, reject) => {
        var sqs = new AWS.SQS({
            apiVersion: '2012-11-05'
        });
        sqs.listQueues(params, (err, data) => {
            if (err) {
                if (retries > 0) {
                    sleep(Math.pow(2, 4 - retries)).then(() => {
                        listSQS(url, params, retries - 1).then(resolve, reject)
                    })
                } else {
                    reject(err)
                }
            } else {
                resolve(data)
            }
        })
    })
}

exports.handler = (event, context, callback) => {
    var url = event.queueUrl;
    listSQS(url).then(data => {