Limiting outside API requests - node.js

Question

I'm trying to limit my use of an external API in my node.js code.
I've set up node rate limiter, but it doesn't seem to be working. I still hit 429's. What else should I be doing that I'm not?
var RateLimiter = require('limiter').RateLimiter; // Rate limits
var limiter = new RateLimiter(1, 2000); // one call every two seconds
self.riotAPI = function(options, cb){
limiter.removeTokens(1, function() {
https.request(options, function(response) {
// Error handling
response.on('error', function (e) {
console.log(e);
});
var str = '';
// Another chunk of data has been recieved, so append it to `str`
response.on('data', function (chunk) {
str += chunk;
});
// Parse and return the object
response.on('end', function () {
if(response.statusCode >= 400) {
var err = "HTTP response "+response.statusCode;
console.log(err);
cb(new Error("err"), null);
}
else {
cb(null, JSON.parse(str));
}
});
}).end();
});
}

Answer 1

I switched to Bottleneck and got everything functioning as desired.
self.riotAPI = function(options, cb){
limiter.submit( function(lcb) {
https.request(options, function(response) {
// Error handling
response.on('error', function (e) {
console.log(e);
});
var str = '';
// Another chunk of data has been recieved, so append it to `str`
response.on('data', function (chunk) {
str += chunk;
});
// Parse and return the object
response.on('end', function () {
if(response.statusCode >= 400) {
var err = "HTTP response "+response.statusCode;
console.log(err);
// If it's a 429, retry
if(response.statusCode == 429) {
console.log("retrying...");
self.riotAPI(options, cb);
}
// If not, fail
else {
cb(new Error("err"), null);
lcb();
}
}
else {
cb(null, JSON.parse(str));
lcb();
}
});
}).end();
}, null);
}