# Aranya Daemon

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[license-url]: ../../LICENSE.md

## Overview

The Aranya Daemon is a long-running executable that is used to maintain
the state of Aranya after adding commands to the graph or syncing commands from
other peers by interacting directly with the
[Aranya Core](https://github.com/aranya-project/aranya-core) library. See
[here](../aranya-daemon-api/src/service.rs) for details on the Aranya
functionality available through the daemon.

The daemon's responsibilities include:
- Periodically syncing state between networked Aranya peers to ensure they all
  have consistent state. This includes the ability to add and remove sync peers,
  available to your application through the [Rust Client library](../aranya-client/).
- Invokes actions received from the client and handles effects from the
  [Aranya Core](https://github.com/aranya-project/aranya-core) library. See the
  [walkthrough](../../docs/walkthrough.md) for more details.
- Generates and maintains cryptographic keys for encrypting and decrypting data
  for Aranya and Fast Channels

Note: The Aranya Daemon supports a single user. As such, device and user may be
used interchangeably throughout the code base.

## Configuration

Create a config file for the daemon before running it. Refer to
this documentation on the JSON config file parameters:
[config](src/config.rs).

An example daemon configuration file can be found [here](example.json).

## Running the daemon

Build and run the daemon crate:
```shell
$ cargo build --bin daemon --release
$ ./target/release/daemon <path to config>
```