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PDR-Websocket Project

This is the PDR-Websocket project, a websockets server that checks for specified Predictoor contracts, buys them based on the provided Private Key and sends the data to the clients.

Prerequisites

If you are running against Barge!

Before setting up the PDR-Websocket project, make sure you have the following components running:

  • Ganache: This is your local Ethereum blockchain, available when you need it.
  • Barge: Barge is a collection of Ocean components packed into one Docker Compose file for easy local development.

Setup

Update env variables

Create a new file called '.env.local' and copy content from '.env.sample'

Check environment variables from .env.sample file and update them accordangly to your setup.

Update configs

  • opfProvidedPredictions: List of Predictoor contracts that the app it's going to purchase subscriptions for, get the predictions and serve it to the client using socket connection.

Run the app

Standalone

Install dependencies

npm i

Start the app

npm start
# or
yarn start
# or
pnpm start

As docket container

Building the Docker image

In the project directory, build the Docker image with the following command:

docker build --build-arg NODE_ENV=development -t pdr-websocket .

This command builds a Docker image for the PDR-Websocket project in development mode. The -t option tags our image with the name pdr-websocket.

Running the Docker container

After building the Docker image, run a container with this image using the following command:

docker run -e NODE_ENV=development -p 8888:8888 --network ocean_backend -d pdr-websocket

This command runs the pdr-websocket image in a new container, mapping the container's port 8888 to port 8888 on your host machine. The -e NODE_ENV=development option sets an environment variable inside the container to indicate we're running in development mode. The --network ocean_backend option connects our container to the ocean_backend network so it can communicate with other Ocean services.