In today’s digital age, privacy is key to secure communication. HOPR is a privacy-preserving messaging protocol designed for just that. In this guide, we’ll walk through the installation, usage, and troubleshooting of HOPR, enabling you to establish a secure communication network powered by relay nodes.

Table of Contents

• About
• Install
• Install via Docker
• Install via Nix package manager
• Usage
• Example Execution
• Using Docker Compose with Extended HOPR Node Monitoring
• Testnet Accessibility
• Migrating Between Releases
• Develop
• Test
• Contact
• License

About

The HOPR project creates various components for running and modifying HOPR nodes, including:

1. hopr-lib: A transport layer for HOPR protocol implementation.
2. hoprd: A daemon application with a REST API for compliance with the HOPR protocol.
3. hoprd-api-schema: Utility for generating the OpenAPI spec.
4. hoprd-cfg: Configuration management tool for hoprd.
5. hopli: Utility for on-chain and identity-related tasks.

Install

To ensure proper performance, always run the latest stable release. There are two primary installation methods: Docker and Nix package manager.

Install via Docker

To install any specific release, set the $RELEASE variable. For instance:

export RELEASE=latest

Then, pull the required container image:

docker pull europe-west3-docker.pkg.dev/hoprassociation/docker-images/hoprd:saint-louis

It’s recommended to set up an alias for easy command invocation.

Install via Nix package manager

This is useful for development purposes. Clone the repository:

git clone https://github.com/hoprnet/hoprnet

Then build and install:

nix build
sudo cp result/bin/* /usr/local/bin/

Usage

Once installed, hoprd allows various command-line configurations:

hoprd --help

For example, a basic command setup could look like:

hoprd --identity apphoprd-db.hopr-identity --password securepassword --init --announce --host 0.0.0.0:9091 --apiToken YOUR_TOKEN --network dufour

In this command, think of your HOPR node as a house:

• **–identity**: The key to the house.
• **–password**: Your security alarm password.
• **–init**: Setting up the house for the first time.
• **–announce**: Telling others your house is ready for visitors.
• **–host**: The address where your house is located.
• **–apiToken**: A token granting access to your collection of valuable items (data).
• **–network**: The street name where your house is located (the blockchain).

Using Docker Compose with Extended HOPR Node Monitoring

For additional monitoring, you can use Docker Compose:

docker compose --file scripts/compose/docker-compose.yml up -d

This will set up a monitoring dashboard for your HOPR nodes.

Testnet Accessibility

To participate in the public network, ensure your node is eligible. For more details, refer to Network Registry.

Migrating Between Releases

There is no backward compatibility, hence follow these steps to migrate:

1. Change the channel strategy to passive.
2. Redeem all unredeemed tickets.
3. Close all open payment channels.
4. Withdraw funds to an external wallet.
5. Note the network name.
6. Backup the identity folder.
7. Launch a new instance with the latest release.

Develop

There are multiple options for development setup, including using Nix and Rust toolchain. Ensure the relevant environment is prepared for efficient coding and testing.

Test

Regular testing is crucial for ensuring stability. The HOPR codebase includes unit testing and CI using GitHub Actions. You can run tests locally to ensure everything is functioning correctly:

make test

Troubleshooting

If you encounter issues, try the following:

• Check the container logs for errors using: docker logs CONTAINER_ID.
• Ensure network settings are correctly configured.
• Revisit the command-line arguments and ensure they are correctly defined.
• Consult the community or resources available on GitHub.

For more insights, updates, or to collaborate on AI development projects, stay connected with fxis.ai.

Conclusion

At fxis.ai, we believe that such advancements are crucial for the future of AI, as they enable more comprehensive and effective solutions. Our team is continually exploring new methodologies to push the envelope in artificial intelligence, ensuring that our clients benefit from the latest technological innovations.