function sendKeys() {
	//console.log('here 1')
	manager.loadInventory(440, 2, true, (err,inventory) => {

		if(err){
			console.log(err);

		} else {

			const offer = manager.createOffer(a[0]);
			inventory.forEach(function(item) {

				if (item.market_name ===  'Mann Co. Supply Crate Key') {

					offer.addMyItem(item);
					offer.send((err, status) => {
						if(err) {
							console.log(err);

						} else{
							console.log(status)

								const removeLines = (data, lines = []) => { //
								    return data
								        .split('\n')
								        .filter((val, idx) => lines.indexOf(idx) === -1)
								        .join('\n');
								}
									fs.readFile('data.txt', 'utf8', (err, data) => {
									    if (err) throw err;
									    fs.writeFile('data.txt', removeLines(data, [0]), 'utf8', function(err) {
									        if (err) throw err;
									    });
									})	//
						}
					});
				}
			});
		}
	});
}