jam/docs/developing.md
2026-01-24 12:19:10 +01:00

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# Developer Docs
A place to collect useful information for developers that doesn't really fit elsewhere.
👉 See [CONTRIBUTING.md](../CONTRIBUTING.md) for how to get started participating in this project.
## JoinMarket Development Environment
For a complete development environment you need a local JoinMarket instance that the web UI can interact with. We provide a regtest environment that should give you everything needed to get started developing with JoinMarket. You can find details here: [docker/regtest/readme.md](../docker/regtest/readme.md).
## Linting
We use Create React App's [default ESLint integration](https://create-react-app.dev/docs/setting-up-your-editor/#displaying-lint-output-in-the-editor).
You'll see linting issues in the console when running the app with `npm run dev`.
Pull request builds will fail if ESLint is not happy with the code.
## Code Formatting
We use the [Prettier](https://prettier.io/) code formatter to keep a consistent code style.
Pull request builds will fail if Prettier is not happy with the code.
There's a couple of options on how to setup Prettier so that it formats your code automatically:
### NPM Script
Running `npm run format` will format the whole codebase.
### Editor Integration
Prettier has great [editor integrations](https://prettier.io/docs/en/editors.html) which will automatically format all files you touch.
### Git Pre-Commit Hook
You can use a pre-commit hook that will automatically format all changes before comitting them to Git.
We use [husky](https://github.com/typicode/husky) and [lint-staged](https://github.com/okonet/lint-staged) for that.
By default, the hook will be installed automatically as an [NPM postinstall script](https://docs.npmjs.com/cli/v6/using-npm/scripts#npm-install).
### Troubleshooting
If you're having issues with Husky not using the correct `$PATH`, you may need to setup a `~/.huskyrc` which will let you set up your path before the hook is run.
See [here](https://typicode.github.io/husky/#/?id=command-not-found) for more info.
## Running the Web UI Locally and Connecting to a Remote JoinMarket Instance
These instructions assume you want to run the web UI locally and connect it to a JoinMarket instance on your RaspiBlitz.
The process should be similar for other setups.
If you run the Web UI and JoinMarket on the same system, simply skip the SSH tunnel step.
### 🚨 Prerequisite: JoinMarket
To run the web UI locally you need to connect it to a running JoinMarket instance.
#### 1. Install JoinMarket
Install [JoininBox](https://github.com/openoms/joininbox) on your [RaspiBlitz](https://github.com/rootzoll/raspiblitz):
```
Services > j [BTC JoinMarket+JoininBox menu]
```
Or follow the JoinMarket [installation guide](https://github.com/JoinMarket-Org/joinmarket-clientserver#quickstart---recommended-installation-method-linux-and-macos-only) if you're on another system.
### 🚨 Prerequisite: JoinMarket API Service
This app makes use of the JoinMarket RPC API. For this, you will need JoinMarket version 0.9.3 or higher. If needed you can upgrade JoinMarket to the latest commit via the JoininBox menu on your RaspiBlitz: Type `jm` in the command line and select `UPDATE > ADVANCED > JMCOMMIT`. This will install the latest development version from JoinMarket's master branch.
#### 2. SSL Certificate
As the joinmarket user on your RaspiBlitz, generate a self-signed certificate for the JoinMarket API Service as described [here](https://linuxize.com/post/creating-a-self-signed-ssl-certificate/), and put the certificate and the key in the `~/.joinmarket/ssl/` directory.
_Hint:_ To login as the JoinMarket user, you can ssh into your RaspiBlitz, type `jm`, and exit the JoininBox menu.
Create the SSL directory:
```bash
(jmvenv) joinmarket@raspberrypi:~ $ mkdir ~/.joinmarket/ssl/
```
Generate the certificate and associated key:
```bash
openssl req -newkey rsa:4096 -x509 -sha256 -days 3650 -nodes -out ~/.joinmarket/ssl/cert.pem -keyout ~/.joinmarket/ssl/key.pem
```
_Hint:_ You don't have to enter anything meaningful, you can just hit the return key a couple of times.
#### 3. API Service
Start the JoinMarket [API service](https://github.com/JoinMarket-Org/joinmarket-clientserver/blob/master/docs/JSON-RPC-API-using-jmwalletd.md):
```bash
(jmvenv) joinmarket@raspberrypi:~/joinmarket-clientserver/scripts $ python jmwalletd.py
```
You should see the following:
```text
2021-11-18 18:16:57,639 [INFO] Starting jmwalletd on port: 28183
2021-11-18 18:16:57,661 [INFO] Joinmarket daemon listening on port 27183
```
#### 4. SSH Tunnel
Create an SSH tunnel for the API service. On the machine where you want to run the web UI, add the following lines to your `~/.ssh/config` file:
```conf
Host raspiblitz
HostName 192.168.X.X # (IP address of your RaspiBlitz)
User admin
ForwardAgent yes
LocalForward 28183 localhost:28183
```
### 💻 Download, Install, Jam
In short:
```bash
git clone https://github.com/joinmarket-webui/jam.git
cd jam/
npm install && npm run dev
```
## Resources
- yup (GitHub): https://github.com/jquense/yup
- react-hook-form (GitHub): https://github.com/react-hook-form/react-hook-form
- react-query (GitHub): https://github.com/TanStack/query