Fetching auction data from the Hypixel API

fetchAllAuctionPages.js

/**
 * Robust function to fetch all auction pages from https://api.hypixel.net/v2/skyblock/auctions. If the auctions update during the time that
 * this function is executing, then it will restart in order to fetch the latest data.
 * @returns {Promise<Object[], Error>} Array of JSON responses from the API, with each entry being a page of auction results. The results are not necessarily in order.
 * @reject {Error} Network error
 * @reject {Error} If the function restarts more than five times due to updates or an API response with "success" set to false.
 * @license MIT
 * @author https://github.com/robere2
 * @see {@link https://gist.github.com/robere2/232691590952b1f1c3de1993b291b6eb} Source
 */
async function fetchAllAuctionPages() {
    let allPages = []
    let tries = 0;
    while(allPages.length === 0) {
        // After five failed attempts, presumably more attempts aren't going to solve the problem.
        if(tries++ >= 5) {
            throw new Error("Tried to fetch auction results five times, but all attempts failed. This could be a Hypixel API error, " +
            "or responses are not coming in fast enough to keep up with the updating results.")
        }

        const firstPage = await (await fetch("https://api.hypixel.net/v2/skyblock/auctions")).json()

        // Last updated timestamp is used to restart the process if results update between now and when we finish all page requests
        const lastUpdated = firstPage.lastUpdated;
        const abortController = new AbortController();
    
        // Request each following page concurrently
        const promises = [];
        for(let i = 1; i < firstPage.totalPages; i++) {
            promises.push((async () =>  {
                try {
                    const res = await fetch(`https://api.hypixel.net/v2/skyblock/auctions?page=${i}`, { 
                        signal: abortController.signal
                    })
                    const page = await res.json();

                    // Abort and restart if the results have updated or API says request failed. Wait a moment to give the
                    // error some time to resolve itself.
                    if((page.lastUpdated !== lastUpdated || res.status === 404 || page.success === false)) {
                        abortController.abort()
                        await new Promise(resolve => setTimeout(() => resolve(), 1000));
                    }
                    return page;
                } catch(e) {
                    if(e.name === "AbortError") {
                        return;
                    }
                    throw e;
                }
            })())
        }
    
        // Await all of the page requests to complete, and add their responses to an array with the first page
        allPages = [firstPage, ...await Promise.all(promises)]
    
        // Aborted due to failure or updated list, restart by deleting the responses
        if(abortController.signal.aborted) {
            allPages = [];
        }
    }

    return allPages;
}