Bitchat is a decentralized messaging platform based on which technology?

The Indian Cyber ​​Crime Coordination Centre (I4C), under the Ministry of Home Affairs, has directed GitHub to remove the repository for Bitchat—a Bluetooth-based decentralized messaging platform—citing concerns related to national security and cybercrime. Bitchat is an open-source messaging system based on a Bluetooth Low Energy (BLE) mesh network; action has been taken against it under the Information Technology Act, 2000, and the IT Rules, 2021, due to concerns regarding its potential misuse.