random-org-mcp-server/dist/rateLimiter.js

MCP Server for api.random.org integration - Generate true random numbers, strings, UUIDs and more

export class RateLimiter {
    constructor(requestsPerSecond, burstSize) {
        this.maxTokens = burstSize;
        this.tokens = burstSize;
        this.refillRate = requestsPerSecond;
        this.lastRefill = Date.now();
    }
    async waitForToken() {
        this.refillTokens();
        if (this.tokens >= 1) {
            this.tokens -= 1;
            return;
        }
        // Calculate how long to wait for the next token
        const timeToWait = (1 / this.refillRate) * 1000; // Convert to milliseconds
        await new Promise(resolve => setTimeout(resolve, timeToWait));
        // Try again after waiting
        return this.waitForToken();
    }
    refillTokens() {
        const now = Date.now();
        const timePassed = (now - this.lastRefill) / 1000; // Convert to seconds
        const tokensToAdd = timePassed * this.refillRate;
        this.tokens = Math.min(this.maxTokens, this.tokens + tokensToAdd);
        this.lastRefill = now;
    }
    getAvailableTokens() {
        this.refillTokens();
        return Math.floor(this.tokens);
    }
}
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