asyncAPI

app.js

const axios = require("axios");

async function getLastRecord(indexID) {
    const response = await axios.get("http://iss.moex.com/iss/history/engines/stock/markets/index/securities/" + indexID + ".json?limit=1");
    const lastRecord = response.data["history.cursor"]["data"][0][1];
    return lastRecord;
}

async function getDataAsync(indexID) {
    const lastRecord = await getLastRecord(indexID);
    let promises = [];
    let data = [];
        for (let i = 0; i < lastRecord; i += 100) {
            promises.push(axios.get("http://iss.moex.com/iss/history/engines/stock/markets/index/securities/" + indexID + ".json?start=" + i));
        }
    const results = await Promise.all(promises);
    data = results.reduce((acc, val) => acc.concat(val.data.history.data), []);
    return(data);    
}

async function printData(indexID) {
    let data = await getDataAsync(indexID);
    console.log(data.length)
}

printData("MICEX10INDEX");