I have a function that has more than 1400+ crypto pairs and I have to send an API against each pair and store the trades. Now each pair takes 3-4 seconds hence the whole function takes a lot of time. I am getting the pairs from my DB and I am storing trade data in my DB as well. I need to process the pairs in parallel so the trades from the pair in the beginning don't miss because the function is not processing.
This is my current function:
const getTrades = async () => {
let page = 1;
const results = await db.query("SELECT * FROM pairs;");
const pairs = results.rows;
const latest = await db.query("SELECT MAX(trade_time) FROM trades");
const latestTrade = latest.rows[0].max;
const coinResult = await db.query("SELECT * FROM coins");
let coinsInfo = coinResult.rows;
coinsInfo = coinsInfo.flat();
for (const pair of pairs) {
let biggestTrade = [];
const response = await axios.get(
`
https://api.binance.com/api/v3/trades?symbol=${pair.pair}`
);
let filtered = response.data;
filtered = filtered.filter((trade) => trade.time > latestTrade);
let sells = filtered.filter((trade) => trade.isBuyerMaker === true);
let buys = filtered.filter((trade) => trade.isBuyerMaker === false);
if (sells.length > 0) {
biggestTrade.push(
sells.reduce(function (prev, current) {
return prev.quoteQty > current.quoteQty ? prev : current;
})
);
}
if (buys.length > 0) {
biggestTrade.push(
buys.reduce(function (prev, current) {
return prev.quoteQty > current.quoteQty ? prev : current;
})
);
}
biggestTrade = biggestTrade.flat();
for (const trade of filtered) {
let priceUSD = 0;
let baseAssetIcon = "null";
for (const coin of coinsInfo) {
if (coin.symbol.toUpperCase() === pair.quote_asset) {
priceUSD = coin.current_price;
}
if (coin.symbol.toUpperCase() === pair.base_asset) {
baseAssetIcon = coin.image_url;
}
if (priceUSD > 0 && baseAssetIcon != "null") {
break;
}
}
if (trade.quoteQty * priceUSD > 50000) {
const results = db.query(
"INSERT INTO trades (exchange_name, exchange_icon_url, trade_time, price_in_quote_asset,price_in_usd, trade_value, base_asset_icon, qty, quoteQty, is_buyer_maker, pair, base_asset_trade, quote_asset_trade) VALUES($1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11,$12, $13)",
[
"Binance",
"
https://assets.coingecko.com/markets/images/52/small/binance.jpg?1519353250",
trade.time,
trade.price,
priceUSD,
trade.quoteQty * priceUSD,
baseAssetIcon,
trade.qty,
trade.quoteQty,
trade.isBuyerMaker,
pair.pair,
pair.base_asset,
pair.quote_asset,
]
);
console.log("TRADE ADDED");
}
}
}
console.log("PAIRS ARE OVER");
};
pairs has over 1400 entries and this is the one where are looping through.
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