The idea is to implement peer-to-peer torrent protocol.

Tracker server works like a signal server, when someone wants to download a file, tracker reacts on posted request and contacts all peers in network, so they can seed that file.

Tracker will also contain queue with requests for downloading and uploading files. RSA encryption is used for encrypting IPs of every seeder that responds to download request. Each file will be downloaded in fixed number of chunks.
Important aspect is that tracker does not contains IPs of every node that contains each file which is the main difference with other torrent protocols.
In future, signal server will be replaced with Ethereum blockchain, because we want decentralization of network.

Every node (peer) in network can be both seeder and downloader.

UPnP protocol is used for connecting nodes in network, where user explicitly forward ports.

Known issue is that UPnP protocol isn't supported on all router devices, also mobile network operator does not support uPnP so our app is (for now) available only for pc.

Except standard golang libraries we've used:

1. "crypto/rand" "crypto/rsa" "crypto/sha256" - for encryption algorithms and data structures
2. "github.com/deckarep/golang-set" - for thread-safe Set implementation
3. "gitlab.com/NebulousLabs/go-upnp" - for UPnP implementation