This project sets up a Dockerized instance of Geth (Go Ethereum) running in Ultra Light Client (ULC) mode.

• Docker and Docker-compose installed on your machine.
• Understanding of Ethereum, Geth and Docker is recommended.

1. Clone the repository:

   git clone <repository-url>
   

2. Navigate to the cloned repository:

   cd <repository-directory>
   

3. Start the Docker service with a specified network. You can specify --goerli, --mainnet or --sepolia as a command line option to determine which network you would like to connect to:

   # For Ethereum mainnet
   EXTRA_OPTS='--mainnet' docker-compose up -d
   
   # For Görli network
   EXTRA_OPTS='--goerli' docker-compose up -d
   
   # For Sepolia network
   EXTRA_OPTS='--sepolia' docker-compose up -d
   

The provided docker-compose.yml file configures a Geth instance in ULC mode, listening on HTTP, and connected to specified trusted ULC servers.

You may replace the servers listed in --ulc.servers with addresses of your trusted servers.

The service exposes the following ports:

• 8545: JSON-RPC HTTP interface
• 30303: P2P network interface

Blockchain data is persisted in a Docker volume mapped to ./eth in your host system.

The service enables the following JSON-RPC APIs: eth, net, web3, debug, and admin.

Ensure to properly manage your Docker environment and restrict access to your system, as your Geth instance will allow external connections due to the --http.addr=0.0.0.0 and --http.vhosts=\* settings. Consider additional security measures for production environments.

This setup allows you to select the network for the Geth ULC client to connect to. You can specify --goerli, --mainnet or --sepolia using the EXTRA_OPTS environment variable while starting the docker service.

For any issues, questions, or suggestions for improvement, please open an issue in the GitHub issue tracker. Contributions are welcome.