HydraChain is an extension of the Ethereum protocol, designed to enable the creation of permissioned distributed ledgers. It functions as a customizable framework that allows users to implement private blockchains while leveraging the Ethereum technology stack. HydraChain supports smart contracts and ensures compatibility with the Ethereum ecosystem, facilitating seamless integration and interoperability. The project is open-source and available for collaboration and development on GitHub, which is the primary platform for accessing its resources and contributing to its growth.