Auto Forward Telegram messages from one group to Another group on telegram

I would just need to make sure that the script is able to copy the contents of all incoming messages in two telegram channels and forward the messages into a 3rd channel/chat on Telegram.

So in Summary:

I want a bot by which i can get all the posts instantly to my Own Channel where i am Admin. I want to get all the messages instantly when it is posted in a specific channel. But i am only a memeber in that channel. I am NOT admin and i can not add any bot to that channel.

Source code available here: https://github.com/telegramdesktop/tdesktop

My Actual Requirement is:-
1. I want all posts to be forwarded to my own channel instantly at same time.
2. I am not admin in the original channel but i am a Member of it.
3. I will not be able to add any Bot to that channel that I am not an administrator in.
4. I am only admin in My channel, so I can add a bot in my own channel.