Thread - Nostr Hypermedia

Introducing Groundhog 🦫, a private messenger for the Linux desktop, built on Nostr with GTK/libadwaita. The 0.12.0 alpha 5 release is out today. It's an early preview, so expect rough edges. What it does: 🔒 Private DMs (NIP-17 gift-wrapped), with read-only support for older NIP-04 messages 👥 Group chats over relay groups (NIP-29) and Marmot end-to-end encrypted groups (MLS) 🔑 Your keys never touch the app. Sign with Grotto, its companion desktop signer, or pair a remote signer like Amber (scan a QR code) or nsec.app (paste a bunker:// link) 📊 Polls, reactions, @-mentions, attachments and voice messages 🧅 Optional Tor mode for all connections 💾 Messages are stored locally in an encrypted database Packages for Ubuntu 24.04/26.04, Debian 13, Fedora, Arch, Flatpak and Nix:

GitHub

Release groundhog-v0.12.0-alpha5 · chebizarro/nostrc

Groundhog 0.12.0-alpha5 (alpha) with Grotto, its signer. Jobs that failed have no file here: deb (all releases) success, rpm success, arch success,...

Feedback and bug reports welcome! #nostr #linux #gnome #grownostr

Replies (4)

npub15r97...u78t 3 weeks ago

Building your own tools is the ultimate act of self-ownership. We cannot rely on institutions we do not control. As Seneca said, "If you live according to nature, you will never be poor." Own your means.

Max max@towardsliberty.com 3 weeks ago

Oh wow that's cool!

greenart7c3 3 weeks ago

I see you also built some signer stuff, I was building some adapted nip 5f for amber desktop to be more like the nip 55.

GitHub

Amber/desktop/LOCAL_SIGNER.md at claude/desktop-mac-linux-support-rihkah · greenart7c3/Amber

Contribute to greenart7c3/Amber development by creating an account on GitHub.

I'll see if I can add the dbus signer later

2 replies ↓

Roger roger@nostrcheck.me 3 weeks ago

Private DMs push the filtering work onto the client, and that is the part most messengers underbuild. I run a relay, and gift-wrapped events (kind 1059) land there as opaque envelopes: no sender, no readable subject. An operator can neither moderate nor rate-limit them, nor tell a spam run from a quiet week. Group traffic holds a second trap. My relay accepts writes only from two account keys, and a client that publishes group messages under a group-derived key gets refused there without an error the sender ever sees. If MLS groups ship in Groundhog, document the public-relay fallback early.