near-protocol-rewards/dist/src/utils/rate-limiter.js

A transparent, metric-based rewards system for NEAR projects

"use strict";
/**
 * Rate limiter configuration and implementation
 * for controlling API request rates
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.RateLimiter = void 0;
class RateLimiter {
    constructor(config) {
        this.requests = 0;
        this.lastReset = Date.now();
        this.maxRequests = config.maxRequestsPerSecond;
        this.timeWindow = config.timeWindowMs || 1000;
        this.retryAfter = config.retryAfterMs || 1000;
    }
    async acquire() {
        const now = Date.now();
        if (now - this.lastReset >= this.timeWindow) {
            this.requests = 0;
            this.lastReset = now;
        }
        if (this.requests >= this.maxRequests) {
            await new Promise((resolve) => setTimeout(resolve, this.retryAfter));
            return this.acquire();
        }
        this.requests++;
    }
    async release() {
        if (this.requests > 0) {
            this.requests--;
        }
    }
}
exports.RateLimiter = RateLimiter;