Sort Swap Markets By Hourly Price Change

// @NO_AUTO_TRANSPILE
'use strict';
import ccxt from '../../js/ccxt.js';
const exchange = new ccxt.binanceusdm();
const timeframe = '1h';
const type = 'swap';
async function fetchOHLCV(symbol) {
    /**
     * @description Wrapper around exchange.fetchOHLCV method
     * @param {string} symbol CCXT unified symbol
     * @returns {[float|str]} 1d array with a single ohlcv record with the market symbol appended
     */
    try {
        const ohlcv = await exchange.fetchOHLCV(symbol, timeframe, undefined, 1);
        ohlcv[0].push(symbol);
        return ohlcv[0];
    }
    catch (err) {
        console.log(symbol + ' failed fetchOHLCV with error ' + err);
    }
}
function getPriceChangePercent(ohlcv) {
    /**
     * @description Gets the price change of a market as a percentage
     * @param {[float]} ohlcv A single ohlcv record with the market symbol appended
     * @returns {[float, str]} The price change as a percent with the symbol for the market
     */
    const open = ohlcv[1];
    const close = ohlcv[4];
    const symbol = ohlcv[6];
    const priceIncrease = close - open;
    const increaseAsRatio = priceIncrease / open;
    const increaseAsPercent = increaseAsRatio * 100;
    return [increaseAsPercent, symbol];
}
function sort(a, b) {
    return a[0] - b[0];
}
async function main() {
    /**
     * @description Gets the price change as a percent of every market matching type over the last timeframe matching timeframe and prints a sorted list. The most immediate candle is ignored because it is incomplete
     */
    await exchange.loadMarkets();
    const allSwapSymbols = exchange.symbols.filter(symbol => exchange.market(symbol)[type]);
    const ohlcvs = await Promise.all(allSwapSymbols.map(symbol => fetchOHLCV(symbol)));
    const priceChanges = ohlcvs.map(ohlcv => getPriceChangePercent(ohlcv));
    const sorted = priceChanges.sort(sort);
    console.dir(sorted, { 'maxArrayLength': null });
}
main();