# Install - nix

## Preliminaries for using nix

For a dev environment with nix package manager a postgres install on the base system is required, this guide does not cover a postgresql server running with nix-shell.

### Set up PostgreSQL

```
sudo -u postgres createdb lamassu
sudo -u postgres psql postgres
```

In ``psql``, run the following and set password to ``postgres123``:

```
\password postgres
ctrl-d
```

### Starting up environment

shell.nix script provided, all you need to do to setup the environment is to run `nix-shell` on the folder. 

## Installation

### Install node modules

Make sure you're running NodeJS 8.3 or higher. Ignore any warnings.

```
npm install
```

### Generate certificates

```
bash tools/cert-gen.sh
```

Notes: 
  - This will create a ``.lamassu`` directory in your home directory.
  
### Set up database

Important: lamassu-migrate currently gripes about a QueryResultError. Ignore this, it works anyway.

```
node bin/lamassu-migrate
```

### Run new-lamassu-admin

```
cd new-lamassu-admin/
npm install
npm run start
```

### Run lamassu-admin-server

In a second terminal window:

```
node bin/lamassu-admin-server --dev
```

### Register admin user

In a third terminal window:

```
node bin/lamassu-register admin@example.com superuser
```

You'll use this generated URL in the brower in a moment.

### Complete configuration

Paste the URL from lamassu-register exactly as output, into a browser (chrome or firefox).

**Important**: the host must be localhost. Tell your browser to trust the certificate even though it's not signed by a recognized CA. If you get an "expired" error, try opening https://localhost:8070/graphql in another tab and trust the certificate.

Go to all the required, unconfigured red fields and choose some values. Choose mock services whenever available.

### Run lamassu-server

```
node bin/lamassu-server --mockScoring
```

### Add a lamassu-machine

Click on ``+ Add Machine`` in the sidebar. Type in a name for your machine and click **Pair**. Open up development tools to show the JavaScript console and copy the totem. You will use this to run lamassu-machine. This pairing totem expires after an hour.

Now continue with lamassu-machine instructions from the ``INSTALL.md`` file in [lamassu-machine repository](https://github.com/lamassu/lamassu-machine).

## Subsequent runs

To start the Lamassu server run:

```
node bin/lamassu-server --mockScoring
```

To start the Lamassu Admin run:

```
node bin/lamassu-admin-server --dev
```

and

```
cd new-lamassu-admin/
npm run start
```