How to share and transfer a large file via p2p?

Question

P2P

I am looking for a solution to transfer large (and not so) files via p2p.
Preferably console, open source, under Lin and Win.
Punching NAT. Similar to BTSync.
Those. the task is something like this:
1. Seeder says:
blahblahsync c:\shared
this directory is hashed, hash is issued
2. Downloader (leecher) says:
blahblahsync hash
3. They find each other even if both are behind NAT (possibly through a torrent DHT )
and pump at the maximum possible speed for both.
Of course, I tried transmission, deluge. For such a transfer (without many hosts
with white ip), they are not suitable - apparently, the hash is simply not published in DHT.
The essence of the search is decentralization and high speed (if it is not deliberately cut along the way ). When I tried transmission, the distributing and downloading
channels had 40-50 honest megabits each, and the speed between seeder -> my intermediate
server with white ip -> leecher jumped in the range of 300-500-700 Kb/sec. And often dropped to zero.
I also searched on github. So far, nothing suitable. If anyone has any thoughts or advice, I'd be
grateful!