TypeScript node:crypto timingSafeEqual function not found

import { createHmac, timingSafeEqual } from 'node:crypto';
import { Buffer } from 'node:buffer';

// Prepend this string to the HMAC that's created from the message
const HMAC_PREFIX = 'sha256=';

// Verify whether our hash matches the hash that Twitch passed in the header.
function verifyMessage(hmac, verifySignature) {
    return timingSafeEqual(Buffer.from(hmac), Buffer.from(verifySignature));
}

export default {
    async fetch(request: Request, env: Env, ctx: ExecutionContext): Promise<Response> {
        const hmac = HMAC_PREFIX + createHmac('sha256', 'MySecret')
            .update('MyMessage')
            .digest('hex');

        if (verifyMessage(hmac, hmac)) {
            console.log('timingSafeEqual true');
        } else {
            console.log('timingSafeEqual false');
        }

        return new Response('');
    }
};