lez-programs/apps/amm/README.md

AMM UI

A QML UI application for the Automated Market Maker (AMM) program.

See the Logos QML UI App Tutorial for more information.

Wallet / chain integration

This app is a ui_qml module with a hand-written C++ backend (src/AmmUiBackend.*, plugin in src/AmmUiPlugin.*) that depends on the core logos_execution_zone wallet module. The backend calls the core module's wallet FFI through m_logos->logos_execution_zone.* and exposes an async QtRO surface (src/AmmUiBackend.rep) plus an account list model to the QML view.

Onboarding is non-invasive. The app opens straight to the Trade screen; the navbar shows Connect (opens a password-only modal) or Connected + the account selector. There is no path picking — the wallet uses LEZ's canonical home, ~/.lee/wallet/ (override with LEE_WALLET_HOME_DIR, the same var LEZ honors), and its config (wallet_config.json) self-initializes.

Account/keystore sharing follows the runtime:

• Standalone (nix run .): own core-module instance, but the canonical ~/.lee/wallet keystore is shared with the LEZ wallet UI and any other LEZ app on the machine. A previously-created wallet auto-opens on launch.
• Inside Basecamp: the core wallet module is a single shared instance, so on startup the backend adopts the already-open wallet (see openOrAdoptWallet()), surfacing shared accounts across apps.

Follow-up: the app reconstructs the wallet paths itself because the logos_execution_zone module only exposes path-taking create_new/open. LEZ's wallet FFI now provides path-free variants (wallet_ffi_create_new_default, wallet_ffi_open_default, plus wallet_ffi_default_config_path / _storage_path / wallet_ffi_wallet_exists_default). Once the module surfaces those over QtRO, the app can drop its defaultWalletHome/Config/Storage logic.

Setup

This project requires Nix with experimental features enabled. If you haven't already, enable them permanently:

mkdir -p ~/.config/nix && echo "experimental-features = nix-command flakes" >> ~/.config/nix/nix.conf

Running the UI

Start the UI with:

nix run .

This builds and runs the application in development mode.

Updating Dependencies

To update the pinned versions of dependencies in flake.lock:

nix flake update