How to find out if a client is currently uploading data of a specific torrent?

[half-dead]

The need of this is to know when we can drop a torrent from a client safely.

[anacrolix]

Do you mean that it has a connection to which it's uploading pieces at that very moment?

[half-dead]

Yes, but I think a connection without any actual traffic shouldn't count.
I'm not familiar with the implementation, so I don't know If there is a possibility.

[anacrolix]

You can always drop a connection safely, and thus by extension, the connections attached to a Torrent or Client. The BitTorrent protocol expects and allows for this, and no harm is done to either end of the connection.

[anacrolix]

I've improved the doc to make this clear.