Find Items In Trades

let targets = [20573078, 416846000, 439984665]; // list of items to search for
let checkBothSides = true; // when false it only checks your side, when true it checks both

function getTrade(sessionId) {
    let data = new FormData();
    data.append('TradeID', sessionId);
    data.append('cmd', 'pull');
    return new Promise(async (resolve, reject) => {
        let response = await fetch('https://www.roblox.com/trade/tradehandler.ashx', {
            method: 'POST',
            body: data,
            headers: {
                'X-CSRF-TOKEN': Roblox.XsrfToken.getToken()
            }
        });
        response = await response.json();
        response = JSON.parse(response.data);
        resolve(response);
    });
};

function getTrades(startIndex) {
    return new Promise(async (resolve, reject) => {
        let response = await fetch('https://www.roblox.com/My/money.aspx/getmyitemtrades', {
            method: 'POST',
            body: JSON.stringify({startindex: startIndex, statustype: "inbound"}),
            headers: {
                'X-CSRF-TOKEN': Roblox.XsrfToken.getToken(),
                'Content-Type': 'application/json; charset=UTF-8'
            }
        });
        response = await response.text();
        response = JSON.parse(response);
        response = response.d.replace('/\/g', '');
        response = JSON.parse(response);
        resolve(response);
    });
};

function mark(index) {
    index += 1;
    let rows = document.getElementsByClassName('datarow');
    rows[index].style.color = "red";
};

async function check(startIndex) {
    let trades = await getTrades(startIndex);
    for (let index in trades.Data) {
        index = Number(index);
        let trade = JSON.parse(trades.Data[index]);
        let tradeInfo = await getTrade(trade.TradeSessionID);
        for (let item of tradeInfo.AgentOfferList[1].OfferList) {
            let id = item.ItemLink.match(/\d/g).join('');
            if (targets.indexOf(Number(id)) > -1) {
                mark(startIndex + index);
            };
        };
        if (checkBothSides) {
            for (let item of tradeInfo.AgentOfferList[0].OfferList) {
                let id = item.ItemLink.match(/\d/g).join('');
                if (targets.indexOf(Number(id)) > -1) {
                    mark(startIndex + index);
                };
            };
        };
    };
};

function run() {
    let index = 0;
    check(index);
    let button = document.getElementsByClassName('btn-control btn-control-small')[0];
    button.addEventListener('click', function() {
        index += 20;
        check(index);
    });
};

run();