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Hydra Head - Proof of Concept (POC)

A home to our colorful experiments and prototypes.

🌄 Introduction

Hydra is the layer-two scalability solution for Cardano, which aims to increase the speed of transactions (low latency, high throughput) and minimize transaction cost.

This repository contains the proof-of-concept implementation for the Hydra Head protocol. It is a developer preview that we've put together, marching towards a production ready solution. It outlines the basic architecture of a hydra-node, which runs a simplified (coordinated) Hydra Head protocol, connects to other hydra-nodes, interfaces the Cardano blockchain and provides an API to clients such as the included terminal user interface hydra-tui.

⚠️ ⚠️ ⚠️

This is still prototypical and exploratory work shared here for your interest.

It is NOT ready for production (yet).

🚀 Getting started

The quickest way to get a hydra-node running is to use our docker images.

docker pull ghcr.io/input-output-hk/hydra-node:latest
docker run --rm ghcr.io/input-output-hk/hydra-node --help

More information (including a demo) available on user manual 📖!

🌈 Features

Proof of concept:

  • Coordinated Hydra Head protocol
  • Single Head per hydra-node
  • Stubbed chain using external process
  • Network statically configured, direct TCP connections
  • WebSocket, message-based API Server
  • Terminal user interface client
  • Cardano-node integration via Direct connection
  • Running on testnet

Later:

  • Persisted Head state
  • Audited and mainnet ready
  • Multiple Heads per hydra-node, managed via API
  • Support for external wallets (e.g. hardware wallets)
  • Optimistic Head closure and incremental de-/commit protocol extension
  • Relay-capable, mesh network

🤝 Contributing

The best way to contribute right now is to provide feedback. Give the demo a test drive and have a look at our documentation. Should you have any questions, ideas or issues, we would like to hear from you:

When contributing to this project and interacting with other contributors, please follow our Code of Conduct.


Thanks for visiting and enjoy ❤️!

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Proof of concept for the Hydra Head protocol 👷

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