Cloud function for Fibonacci number check via HTTP triggers.

cloudfunction.ts

import * as functions from 'firebase-functions';

exports.pruoo = functions.https.onRequest((request, response) => {
    let a:number = 0;
    let b:number = 1;
    let n = request.query.n;
    console.log(request.query);
    for(let i:number=2; i<=n; i++) {
        const c:number = a+b;
        console.log(c);
        if(n===c || n===b || n===a) response.status(200).json({ "success": "true" });
        else if(c>n) response.status(200).json({ "success": "false" });
        a=b;
        b=c;
    }
});