Identity overhaul (server changes deployed to goblin.st separately):
Avatars
- profile pictures hosted on goblin.st, tied to the username: tap the
settings avatar → native image picker → 256px PNG uploaded over Tor
- letter avatars now use (background, ink) color pairs (8) keyed off the
npub, and render the first ALPHANUMERIC char — never the '@'
- custom pictures shown everywhere self/contacts appear: settings card,
home header, sidebar chip, peers strip, activity rows, send recipient
- AvatarTextures: disk cache (~/.goblin/cache/avatars) + background Tor
fetch + egui textures loaded on the UI thread; a network/Tor failure
is never cached as "no avatar" (would have stuck for 6h)
- nostr/avatar.rs mirrors the server's sniff→limits→orientation→crop→
256→re-encode-PNG pipeline so uploads are small and previews instant
Username lifecycle
- rotating the key now RELEASES the username (and deletes its avatar
server-side) instead of transferring; rotation aborts if release fails
- claim panel is one Claim button (checks then registers); registered
state shows "Registered <name>" + a Release action behind an
are-you-sure gate ("up for grabs the moment it's free")
- released names are immediately re-claimable (quarantine removed)
Other
- Tor::http_request_bytes: binary bodies + status code, for upload and
avatar download (string http_request kept as a wrapper)
- settings reordered Identity-first, then Wallet
- sidebar node card is 3 lines: status / block height / host
- profile card shows the full npub when it fits, else head…tail
34 lib tests green. Live-verified on goblin.st: upload→serve (image/png,
nosniff, immutable)→5/day limit (6th 429)→release purges avatar; a real
picture for @fartmuncher22 fetched over Tor and rendered across surfaces.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Grim

Cross-platform GUI for GRiN ツ in Rust for maximum compatibility with original Mimblewimble implementation. Initially supported platforms are Linux, Mac, Windows, limited Android and possible web support with help of egui - immediate mode GUI library in pure Rust.
Named by the character Grim - the shape of a large, black, menacing, spectral giant dog.
Build instructions
Install Rust
Follow instructions on Windows.
curl https://sh.rustup.rs -sSf | sh
Desktop
To build and run application go to project directory and run:
git submodule update --init --recursive
cargo build --release
./target/release/grim
Android
Set up the environment
Install Android SDK / NDK / Platform Tools for your OS according to this FAQ.
Build the project
Run Android emulator or connect a real device. Command adb devices should show at least one device.
In the root of the repo run ./scripts/android.sh build|release v7|v8|x86, where is v7, v8, x86 - device CPU architecture for build type, for release specify version number in format major.minor.patch.
License
Apache License v2.0.
