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](https://github.com/logos-co/logos-tutorial/blob/master/tutorial-qml-ui-app.md) 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 wallet FFI requires explicit `config_path`/`storage_path` even
> though the wallet crate already defines defaults (`~/.lee/wallet`,
> `from_path_or_initialize_default`). A `wallet_ffi_create_new_default()` /
> `_open_default()` upstream would let the app drop its path handling entirely.

## Setup

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

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

Install the Logos package manager CLI globally (one-time):

```bash
nix profile install 'github:logos-co/logos-package-manager#cli'
```

This makes `lgpm` available as a global command.

## Running the UI standalone

Start the UI with:

```bash
nix run .
```

This builds and runs the application in development mode. The Logos bridge is unavailable in standalone mode, but the UI layout and mock data are fully functional.

## Running inside Logos Basecamp

This app is a UI plugin that depends on the **core wallet module**
`logos_execution_zone` (see the Wallet / chain integration section above). Both
have to be installed into Basecamp — the UI plugin alone will show the AMM tab
but fail to open it with `Failed to load core dependencies for amm_ui`.

### 1. Build the LGX packages

```bash
# The AMM UI plugin — development variant (requires nix store at runtime)
nix build '.#lgx' --out-link result-lgx

# Portable variant (self-contained, works without nix)
nix build '.#lgx-portable' --out-link result-lgx-portable

# The core wallet module it depends on. Use the same rev this app pins as the
# `logos_execution_zone` input in flake.nix so the ImageID/ABI match.
nix build 'github:logos-blockchain/logos-execution-zone-module?rev=d2e9400ac06c3cdbfc2405b4f153fff9841a453c#lgx' \
  --out-link result-core
```

### 2. Install into Basecamp

```bash
# Launch Basecamp once to initialise its data directory, then quit (see below)

# Set the data directory path
# macOS:
BASECAMP_DIR="$HOME/Library/Application Support/Logos/LogosBasecampDev"
# Linux:
# BASECAMP_DIR="$HOME/.local/share/Logos/LogosBasecampDev"

# Install the core wallet module first (into the modules dir), then the UI plugin
lgpm --modules-dir "$BASECAMP_DIR/modules" \
  install --file result-core/*.lgx
lgpm --ui-plugins-dir "$BASECAMP_DIR/plugins" \
  install --file result-lgx/*.lgx
```

> **Note:** Use matching variants throughout — dev with dev, portable with portable. Mixing variants causes loading failures. The portable build uses the `LogosBasecamp` data directory instead of `LogosBasecampDev`.

### 3. Launch Basecamp

```bash
nix build 'github:logos-co/logos-basecamp' --accept-flake-config -o ~/.basecamp-result
~/.basecamp-result/bin/LogosBasecamp
```

The AMM UI appears as a new tab in the Basecamp sidebar.

> **Note:** `nix run 'github:logos-co/logos-basecamp'` currently fails with
> `unable to execute ... No such file or directory` — the flake's default app
> is named `logos-basecamp` but the packaged binary is `LogosBasecamp`. Build
> the package and run the `bin/LogosBasecamp` wrapper directly, as above.

### Installing via the Basecamp UI

Alternatively, use the built-in package manager. Install both packages — the
core module from `result-core/` and the UI plugin from `result-lgx/`:

1. Launch Basecamp
2. Open Package Manager
3. Select "Install from file"
4. Choose the core module `.lgx` from `result-core/`, then the UI plugin `.lgx`
   from `result-lgx/`

## Updating Dependencies

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

```bash
nix flake update
```

## Troubleshooting

**Stale QML cache after rebuild:**
```bash
QML_DISABLE_DISK_CACHE=1 ~/.basecamp-result/bin/LogosBasecamp
```

**Reset Basecamp data directory:**
```bash
# macOS
rm -rf ~/Library/Application\ Support/Logos/LogosBasecampDev
# Linux
rm -rf ~/.local/share/Logos/LogosBasecampDev
```