@mvp-rockets/namma-ratelimit/ratelimit.js

A package to handle ratelimit in node apis

const rateLimit = require('express-rate-limit')
const { createClient } = require('redis');
const RedisStore = require("rate-limit-redis");
const { logError, ApiError } = require('@mvp-rockets/namma-lib/utilities');
const { HTTP_CONSTANT } = require("@mvp-rockets/namma-lib")
const config = {};
let client;
const reload = () => {
    client = createClient(config.configurations);
    client.connect().then(() => {
        console.log("Successfully connected to redis server")
    });
    client.on('error', err => {
        console.log('Error ' + err);
    });
};

const initialize = (configurations) => {
    config.configurations = configurations;
    reload();
};

const requestsPerMin = (times) => rateLimit({
    windowMs: 60 * 1000, // 1 min
    max: times,
    message: 'Too many accounts created from this IP, please try again after an hour',
    standardHeaders: true,
    legacyHeaders: false,
    store: new RedisStore({
        sendCommand: (...args) => {
            return client.sendCommand(args)
        },
    }),
    handler: (request, response, next, options) => {
        logError("Ip blocked exceeded the rate limit", options)
        next(new ApiError(options, options.message, HTTP_CONSTANT.TOO_MANY_REQUESTS))
    }
})

module.exports = { requestsPerMin, initialize };