steam_transaction_totals.js

// To be run on https://store.steampowered.com/account/history/
function parseTotals()
{
	var transactions = document.getElementsByClassName('wallet_table_row');
	var totals = { usd: 0, eur: 0 };
	for (var i = 0; i < transactions.length; ++i)
	{
		var transaction = transactions[i];
		var items = transaction.getElementsByClassName('wht_items')[0];
		if (items && items.innerText.indexOf('Wallet Credit') >= 0)
			continue;
		var total = transaction.getElementsByClassName('wht_total')[0];
		if (!total)
			continue;

		total = total.innerText.strip();

		if (total[0] == '$')
		{
			total = total.substr(1);
			totals.usd += parseFloat(total);
		}
		else if (total[total.length - 1] == '€')
		{
			total = total.replace(',', '.').substr(0, total.length - 1);
			totals.eur += parseFloat(total);
		}
	}

	return totals;
}

function printTotals()
{
	var loadMore = document.getElementById('load_more_button');
	if (loadMore && loadMore.style.display !== 'none')
	{
		loadMore.click();
		console.log("Loading more transactions first...");
		setTimeout(printTotals, 2000);
		return;
	}

	var historyLoading = document.getElementById('wallet_history_loading');
	if (historyLoading && historyLoading.style.display !== 'none')
	{
		console.log("Waiting for transaction loading to finish...");
		setTimeout(printTotals, 2000);
		return;
	}

	var totals = parseTotals()
	if (totals.usd > 0)
		console.log("USD: $" + totals.usd.toFixed(2));
	if (totals.eur > 0)
		console.log("EUR: " + totals.eur.toFixed(2) + "€");
}

printTotals();