API WebSocket Bridge

API WebSocket Bridge is a Node.js application designed to be run in a Docker container. It constantly refreshes an API at a set interval and distributes WebSocket (WSS) events to connected clients.

Prerequisites

Before running the API WebSocket Bridge, make sure you have the following:

• Docker installed on your machine.

Getting Started

To run the API WebSocket Bridge in a Docker container, follow these steps:

1. Clone this repository to your local machine.
2. Navigate to the project directory.

cd api-websocket-bridge

3. Configure the API WebSocket Bridge by editing the config.json file located in the config directory. Refer to the 'Configuration' section below for details on how to customize the configuration based on your requirements and the API you are working with.

4. Build the Docker image.

docker build -t api-websocket-bridge .

5. Run the Docker container, exposing the necessary port and providing the required volume mounts.

docker run -d -p 8080:8080 --name api-websocket-bridge \
  -v /path/to/cert/fullchain.pem:/app/cert/fullchain.pem \
  -v /path/to/cert/privkey.pem:/app/cert/privkey.pem \
  -v /path/to/config:/app/config \
  api-websocket-bridge

Make sure to replace /path/to/cert with the path to your SSL certificate and key files, and /path/to/config with the path to your config.json file.

Configuration

The API WebSocket Bridge application relies on a configuration file (config.json) to specify various settings. Below is an example configuration that corresponds to the example response from Salty Bet's API:

{
  "certPath": "/app/cert/fullchain.pem",
  "keyPath": "/app/cert/privkey.pem",
  "port": 8080,
  "updateInterval": 5000,
  "apiUrl": "https://www.saltybet.com/state.json",
  
  "events": {
    "teamNamesChange": {
      "emitEvent": "teamNamesChange",
      "params": ["p1name", "p2name"] 
    },
    "betAmountChange": {
      "emitEvent": "betAmountChange",
      "params": ["p1total", "p2total"]
    },
    "statusChange": {
      "emitEvent": "statusChange",
      "params": ["status"]
    },
    "alertChange": {
      "emitEvent": "alertChange",
      "params": ["alert"]
    },
    "remainingChange": {
      "emitEvent": "remainingChange",
      "params": ["remaining"]
    }
  }
}

• "certPath" and "keyPath" specify the file paths for the SSL certificate and private key respectively.
• "port" defines the port number on which the WebSocket server will run.
• "updateInterval" determines the interval (in milliseconds) at which the API will be checked for updates.
• "apiUrl" specifies the URL of the API that provides the match information. In this case, it is Salty Bet's API endpoint (https://www.saltybet.com/state.json).
• "events" contains a mapping of event types to their corresponding configuration.

The example response from Salty Bet's API:

{
  "p1name": "Upset chieshen",
  "p2name": "Brunestud arcueid",
  "p1total": "0",
  "p2total": "0",
  "status": "open",
  "alert": "",
  "x": 0,
  "remaining": "78 more matches until the next tournament!"
}

The configuration defines five events with their respective emitEvent names and associated parameters. These events allow you to subscribe to specific changes in the API response:

• teamNamesChange: Triggers when the names of the players change ("p1name" or "p2name").
• betAmountChange: Triggers when the total bet amounts change ("p1total" or "p2total").
• statusChange: Triggers when the match status changes ("status").
• alertChange: Triggers when there is an alert or message change ("alert").
• remainingChange: Triggers when the number of matches remaining changes ("remaining").

These events provide flexibility in handling specific updates and allow you to emit WebSocket events accordingly.

Please make sure to modify the configuration file (config.json) according to your requirements and the API you are working with.

Development

To set up the project for development, follow these steps:

1. Clone this repository to your local machine.
2. Navigate to the project directory.

cd api-websocket-bridge

3. Install the required dependencies.

npm install

4. Start the API WebSocket Bridge.

npm start

The API WebSocket Bridge will now be running on your local machine.

License

This project is licensed under the Apache 2.0.

Acknowledgements

This project makes use of the following packages:

• axios v1.4.0
• events v3.3.0

We would like to express our gratitude to the authors and maintainers of these packages for their valuable contributions to the open-source community.