No. But neither does the code in examples of the blog.

name = "worker-t"
main = "src/worker.js"
compatibility_date = "2024-05-07"
node_compat = true

name = "worker-t"
main = "src/worker.js"
compatibility_date = "2024-05-07"
node_compat = true

export default {
  fetch(req: Request) {
    const someHeader = req.headers.get("some-header");
  }
}

export default {
  fetch(req: Request) {
    const someHeader = req.headers.get("some-header");
  }
}

export interface Env {
    BUCKET_URL_AUTH_GENERATION_KEY: string;
    BUCKET_URL_SYMMETRIC_KEY: string;
}

export default {
    async fetch(request: Request, env: Env,): Promise<Response> {
        if (!env.BUCKET_URL_AUTH_GENERATION_KEY || !env.BUCKET_URL_SYMMETRIC_KEY) {
            return new Response("Missing required environment variables", { status: 500 });
        }

export interface Env {
    BUCKET_URL_AUTH_GENERATION_KEY: string;
    BUCKET_URL_SYMMETRIC_KEY: string;
}

export default {
    async fetch(request: Request, env: Env,): Promise<Response> {
        if (!env.BUCKET_URL_AUTH_GENERATION_KEY || !env.BUCKET_URL_SYMMETRIC_KEY) {
            return new Response("Missing required environment variables", { status: 500 });
        }