How to get chat_id for Telegram bot

telegram_chat_id.md

1. Create telegram bot https://core.telegram.org/bots/api#authorizing-your-bot. Make sure the bot works as expected:

$ export TELEGRAM_TOKEN=your_token
$ curl -s https://api.telegram.org/bot$TELEGRAM_TOKEN/getMe
{
  "ok": true,
  "result": {
    "id": xxx,
    "is_bot": true,
    "first_name": "drone",
    "username": "cuongnv23_telegram_bot"
  }
}

2. Create a group, add your bot to that group with admin right. Send any message to the group
3. Get the chat_id:

$ curl https://api.telegram.org/bot$TELEGRAM_TOKEN/getUpdates -s | jq '.result[0].message.chat.id'
-xxx