logos-libchat-mls-android

This is a personal, experimental hobby project. It is not an official Logos product. Not audited.

Android arm64-v8a build of the new pure-Rust libchat generation — stable hex addresses, MLS groups (OpenMLS / de-mls), and persistent identity — cross-compiled into a JNI cdylib (liblogoschat.so) for the logos-chat-android app.

This is the MLS-rebuild sibling of xAlisher/logos-libchat-android (the older ephemeral intro-bundle build). It wraps logos-messaging/libchat @ d2124fd in a thin C ABI and reuses the proven arm64 delivery node from xAlisher/logos-libdelivery-android.

What's here

prebuilt/arm64-v8a/   liblogoschat.so (stripped) + liblogosdelivery.so + librln.so
                      + libc++_shared.so + SHA256SUMS   ← drop into jniLibs
include/              liblogoschat.h    ← the C ABI (13 verbs + event callback)
wrapper/              the cdylib wrapper crate source (logos_chat facade -> C ABI)
patches/              libchat-android-arm64.patch (android build.rs, alloy pare,
                      persistent-identity rehydration)
scripts/              build-android-arm64.sh (exact working sequence) + smoke.c
docs/                 BUILD.md, build-fork-tree.md (every wall + fix)
.github/workflows/    build.yml (from-source rebuild + artifact)

C ABI (see include/liblogoschat.h)

Identity/lifecycle: logoschat_gen_address (network-free mint), logoschat_open, logoschat_open_persistent (stable address across restarts), logoschat_shutdown. Verbs: get_address, installation_name, create_conversation, create_group, add_group_member, list_conversations, send_message, set_event_callback. Plus last_error + free_string. Mirrors the desktop chat_module contract; compiled panic="abort" (errors -> null/-1 + thread-local message).

Build

export ANDROID_NDK_HOME=~/Android/Sdk/ndk/27.1.12297006
rustup target add aarch64-linux-android
bash scripts/build-android-arm64.sh

See docs/BUILD.md. The three scoped cross-compile walls (aws-lc-rs, alloy, delivery ABI) are documented with their exact fixes in docs/build-fork-tree.md — none blocked.

Status

• M0' (build + on-device smoke): done. liblogoschat.so (arm64, 13 exports) smoked on a Samsung SM-G780G and a Pixel: gen_address -> 64-hex address; full open() -> embedded node + registry + address; open_persistent() -> same address across restarts (the persistent-identity gate).
• Next: M1' wires these verbs into the app's Kotlin/JS bridge and deletes the ephemeral intro-bundle apparatus.

Built autonomously as part of the logos-chat-android MLS rebuild.