The Lightning Network Daemon (lnd) is a comprehensive implementation of a Lightning Network node, offering robust channel management capabilities, including creation, closure, and maintenance of all channel states. It integrates with several back-end chain services such as btcd, bitcoind, and the experimental light client neutrino. Leveraging the btcsuite Bitcoin libraries, lnd provides a suite of re-usable Lightning Network libraries. It aligns with most BOLTs (Basis of Lightning Technology) specifications, facilitating seamless operations like onion-encrypted payment routing and automated channel management. Designed for developer ease, lnd offers two primary RPC interfaces—HTTP REST API and gRPC service. Though still in beta, and not yet API stable, it is a powerful tool for developers to build applications atop the Lightning Network, supported by extensive documentation and community resources. Emphasizing security, the project encourages responsible disclosure of vulnerabilities and provides rigorous operational guidelines for maintaining mainnet nodes.