Architecture components

Light clients can be seen as lightweight nodes that enable users to interact with the blockchain without needing to download the entire blockchain history. They rely on full nodes to provide necessary data, such as block headers, and use cryptographic proofs to verify transactions and maintain security.

There are four core components that need to exist to have a functional light client bridge running:

• Source Chain Node: A full node of the source chain from which it is possible to fetch the necessary data to generate our proofs.
• Coordinator Middleware: This middleware is responsible for orchestrating the other components that are part of the architecture.
• Light Client Proving Servers: The core service developed by Lurk. It contains all the necessary logic to generate the necessary proofs and exposes it through a simple RPC endpoint.
• Verifier: A software that can verify the proofs generated by the Light Client. This verification can happen in a regular computer, using a Rust verifier exposed by the Proof servers, or it can be implemented as a smart contract living on a destination chain.