There are two ways this could work.
It could be purely darknet which would mean that the instance only federates with darknet instances.
The other option would be to have a darknet mirror of the clearnet.
I2P Community Edition
This isn't the official I2P channel, if you want go there then you can find it in the links below.
Rules
"Don't be a dick" - Wil Wheaton
General
I2P Forum (clearnet) Official I2P community and development forum
zzz zzz's personal website, old developers forum
planet.i2p RSS aggregator
Media:
File Hosting and Pastebins
FS Filesharing service
Cake Pastebin short term filesharing and pastebin
PrivateBin Encrypted pastebin
IDK's CowYo pastebin, Mirror (Requires JS)
Torrents
PaTracker Main torrent tracker
Chudo's Torrents (French) torrent tracker
Social Networks and Microblogging
Exploring I2P
I2P Name Registries
reg.i2p operated by PurpleI2P Team
isitup.i2p Another I2P Name Registry and checking tools to see if a eepsite is offline.
Search engines
IRC
Irc2P comes pre-configured with I2P. To connect with other networks, please follow this tutorial.
Syndie
An open source system for operating distributed forums in anonymous networks
Syndie Project Syndie Project Website
syndie.darrob.i2p
syndie.echelon.i2p
syndie.inscrutable.i2p
syndie.killyourtv.i2p
syndie.meeh.i2p
syndie.welterde.i2p
Inproxies
You can use inproxies to surf the I2P network without having to have an I2P router.
i2phides.me / i2p.mk16.de (i2p-inproxy.mk16.de)
onion.ly
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There are two ways this could work.
It could be purely darknet which would mean that the instance only federates with darknet instances.
The other option would be to have a darknet mirror of the clearnet.
I think it should be possible with a reverse proxy. I don't see why not
I'd wager tor is more suitable to contact clearnet as I2P but i may be wrong.
I get what your saying. But I think having a network of Lemmy instances on I2P would be nice. Bonus if you can also communicate with clear net instances from it.