Meteor Concurrency Model

in App.js I call:

Meteor.call(‘orders.newBuyLimit’, this.state.marketName, this.state.price, Meteor.userId(), name, this.state.marketName.maxValue)

in orders.js I have:

if(Meteor.isServer){

// This code only runs on the server
Meteor.publish('orders', function ordersPublication() {
	return Orders.find();
 });

Meteor.methods({
  'orders.newBuyLimit'(marketName, price, user, userName, maxPrice) {
 
 	findOneAndUpdate=Meteor.wrapAsync(Orders.rawCollection().findOneAndUpdate)
 	try{
	    const response = findOneAndUpdate(
	    {
	    	$and: [
	    	{sellerActive:1},
	    	{sellerExists:1},
	    	{marketName:marketName},
	    	{price: {$lt:price}},]
	    },
	    {
	    	$set: {
	    		buyerId:user,
	    		buyerPrice:price,
	    		buyerExists:1,
	    		buyerActive:1,
	    		buyerTime: new Date(),
	    		buyerResult:1.01*price,
	    		buyerName:userName,
	    		marketName:marketName,
	    	}
	    },
	    {
	    	sort: {
	    		price: 1
	    	}
	    },
	    {
	    	upsert:true,
	    	returnNewDocument:true,
	    },
	    function(err,result) {
		    if ( err ) {
		        console.warn(err);
		    } else {
		        console.log(result);
		    }});
	} catch (err) {
    	throw new Meteor.Error(err);
    }
  },

};