# LEZ Explorer UI

A QML block explorer for the **Logos Execution Zone** (LEZ), packaged as a `logos-module-builder` **`ui_qml`** module (universal authoring model). The QML view runs process-isolated in a `ui-host`, backed by a small C++ backend that reads from the [`lez_indexer_module`](https://github.com/logos-blockchain/lez-indexer-module) **in-process over the Logos protocol** (Qt Remote Objects) — no WebSocket, no external RPC socket.

## Features

- Browse recent blocks with a live tip poll (new heads appear automatically)
- Block details: hash, previous hash, timestamp, Bedrock status, signature, transactions
- Navigate to the previous block via a clickable hash link
- Transaction details (Public, Privacy-Preserving, Program Deployment)
- Account details with recent transaction history
- Search by block id, block hash, transaction hash, or account id
- Browser-style back/forward navigation
- "Load more" pagination for older blocks
- Copy buttons on hashes / ids; in-app **Settings** JSON editor to configure & (re)start the indexer (no file paths; persists across launches)
- Styled with the shared `Logos.Theme` / `Logos.Controls` design system

## Architecture

- `src/lez_explorer_ui.rep` — the QtRO view contract (PROPs / SLOTs / SIGNALs).
- `src/lez_explorer_ui_backend.{h,cpp}` — the only hand-written C++: derives the
  generated `LezExplorerUiSimpleSource` + `LogosUiPluginContext`, calls the
  indexer with typed `modules().lez_indexer_module.*`, converts its compact JSON
  into QVariant for the view, and polls the chain tip for live updates.
- `src/qml/` — the view (`Main.qml`, `pages/`, `components/`, `icons/`).

The `*Plugin` / `*Interface` glue is generated by the builder from the `.rep` + `metadata.json` (`interface: "universal"`).

## Building with Nix

```sh
git add -A          # nix only sees git-tracked files
nix build           # runs repc + compiles → result/lib/lez_explorer_ui_plugin.{so,dylib}
nix run .           # preview in logos-standalone-app (spawns the ui-host)
nix build .#lgx     # bundle as a .lgx for logos-basecamp
```

Running against live data: open **Settings** (gear icon, top-right), edit the indexer config JSON (pre-filled with a working template) and press **Save & Start** — the explorer persists the config and (re)starts the indexer from it, so no file paths are involved, and it auto-restarts from the saved config on the next launch. Load the explorer and indexer `.lgx` bundles together in logos-basecamp for the full experience.

## Testing

`tests/ui-tests.mjs` holds UI smoke tests (auto-detected by `mkLogosQmlModule`): they launch the view, wait for it to come up, and check the home page renders. They don't require a running indexer — with none ingesting, the backend stays in its "Connecting" empty state, which is expected.

```sh
git add -A                       # nix only sees tracked files
nix build .#integration-test -L  # build + run the tests (logs streamed with -L)
```

> [!TIP]
>
> To iterate interactively against a local, un-pushed indexer branch, add the override used during development:
>
> ```sh
> nix build .#integration-test -L \
>   --override-input lez_indexer_module path:../lez-indexer-module
> ```

## License

Licensed under either of

- Apache License, Version 2.0 ([LICENSE-APACHE-v2](LICENSE-APACHE-v2))
- MIT License ([LICENSE-MIT](LICENSE-MIT))

at your option.