Configure a Telegram bot to echo incoming texts without hosting a server. How can I dynamically retrieve the chat identifier necessary to respond? For example:
https://api.telegram.org/botNEW_TOKEN/setCallback?target=https://api.telegram.org/botNEW_TOKEN/triggerEcho?message=Hello&chat_ref=<CHAT_ID>
In my experience, a viable solution is to utilize the getUpdates method provided by Telegram. When working with a bot without a dedicated server, I set up a serverless function on a platform like Cloud Functions or AWS Lambda to poll getUpdates at a set interval. This approach allows you to obtain the chat identifier dynamically after any new message arrives. After extracting the chat id from the update payload, you can then use that value in subsequent API calls to echo the message. This method worked seamlessly for my project.