@rsksmart/express-did-auth/lib/classes/request-counter.js

Authentication with Verifiable Credentials for Express.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.RequestCounter = void 0;
const defaults_1 = require("../defaults");
const errors_1 = require("../errors");
class RequestCounter {
    constructor({ maxRequestsPerTimeSlot, timeSlot }) {
        this.accesses = [];
        this.maxRequests = maxRequestsPerTimeSlot || defaults_1.MAX_REQUESTS_PER_TIME_SLOT;
        this.timeSlot = timeSlot || defaults_1.REQUEST_COUNTER_TIME_SLOT;
    }
    count() {
        const now = Date.now();
        if (!this.accesses)
            this.accesses = [now];
        else if (this.accesses.length < this.maxRequests)
            this.accesses.push(now);
        else if (now - this.accesses[0] > this.timeSlot) {
            this.accesses.shift();
            this.accesses.push(now);
        }
        else
            throw new Error(errors_1.MAX_REQUESTS_REACHED);
    }
}
exports.RequestCounter = RequestCounter;
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