You must create a temporary bot account using @BotFather.
Then, build this example:
wrangler buildBefore running the example, you should store your bot token to Cloudflare secrets.
wrangler secret put BOT_TOKENYou can now run the example.
wrangler devYou may want to use tunnelling tool such as ngrok to expose your dev webhook server to Telegram.
Visit https://api.telegram.org/bot<your bot token>/setWebhook?url=<your webhook url>
to set up the webhook.