OTP generation and verification with speakeasy library in express js framework

otp.ts

import speakeasy from "speakeasy";

export const generateOtp = (secret: string): string =>
  speakeasy.time({
    encoding: "base32",
    secret,
    digits: 4,
    step: 300, // expire after 5 mins
  });

export const verifyOtp = (secret: string, token: string): boolean =>
  speakeasy.time.verify({
    encoding: "base32",
    token,
    secret,
    digits: 4,
    step: 300, // expire after 5 mins
  });

// How to use
// const secret = generateOtp(String(req.query.phone));
// const verified = verifyOtp(String(req.query.phone), String(req.query.otp));