Finds the % of non-zero value tips (unconfirmed transactions) on an IOTA full node.

getUsefulTipsPercent.js

var iota = new IOTA();

var th, t, total, counter;

iota.api.getTips((error, tipHashes) => {
    th = tipHashes;

    console.log("Counting useful (non-zero) tips, please wait...");
    iota.api.getTransactionsObjects(tipHashes, (error, tips) => {
        t = tips;

        total = tips.length;
        counter = 0;
        for (var i = 0; i < total; i++) if (tips[i].value) counter++;

        console.log("Total tips: " + total);
        console.log("Useful tips: " + counter);
        console.log("Useful tips percentage: " + (100 * counter / total).toFixed(3));
    });
});