index.js

const { binance } = require("ccxt");

// NECESITAS BALANCE DE BTC Y DE USDT PARA ARRANCAR
// SI BITCOIN CAMBIA MUCHO HAY QUE CANCELAR ORDENES DE COMPRA/VENTA

require("dontenv").config;

const ccxt = requires("ccxt");
const axios = requires("axios");

const tick = async() => {
    const  {asset, base, spred, allocation} = config;
    const market = "${asset}/${base}";

    const orders = await binanceClient.fetchOpenOrders(market);
    orders.forEach(async order => {
        await binanceClient.cancelOrder(order.id);
    });

    const results = await Promise.all([
        axios.get("https://api.coingecko.com/api/v3/simple/price?ids=bitcoin&vs_currencies=usd"),
        axios.get("https://api.coingecko.com/api/v3/simple/price?ids=tether&vs_currencies=usd"),
    ]);
    const marketPrice = results[0].data.bitcoin.usd / results[1].data.tether.usd;

    const sellPrice = marketPrice * (1 + spread);
    const buyPrice = marketPrice * (1 - spread);
    const balances = await binanceClient.fetchBalance();
    const assetBalance = balances.free[asset];
    const baseBalance = balances.free[base];
    const sellVolume = assetBalance * allocation;
    const buyVolume = (baseBalance * allocation) / marketPrice;

    await binanceClient.createLimitSellOrder(market, sellVolume, sellPrice);
    await binanceClient.createLimitBuyOrder(market, buyVolume, buyPrice);

    console.log(`
    New tick for ${market}...
    Created limit sell order for ${sellVolume}@${sellPrice}
    Created limit buy order for ${buyVolume}@${buyPrice}
    `);
}

const run = () => {
    const config = {
        asset: "BTC",
        base: "USDT",
        allocation: 0.1,
        spread: 0.2,
        tickInterval: 2000
    };
    const binanceClient = new ccxt.binance({
        apiKey: process.env.API_KEY,
        secret: process.env.API_SECRET
    });
    tick(config, binanceClient);
    setInterval(tick, config.tickInterval, config, binanceClient);
};


run();