LND: Lightning Network Daemon Implementation

Complete Lightning Network node implementation with channel management, payment routing, and BOLT specification compliance.

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Learn more about LND

LND (Lightning Network Daemon) is a complete implementation of a Lightning Network node for Bitcoin's second-layer payment protocol. The daemon supports multiple Bitcoin backend services including btcd, bitcoind, and neutrino, and uses the btcsuite library collection for Bitcoin operations. LND handles channel creation and management, maintains an authenticated channel graph, performs payment routing with onion encryption, and includes automatic channel management through autopilot functionality. The implementation serves as both a standalone Lightning node and a platform for building Lightning-enabled applications through its REST and gRPC APIs.

Full BOLT Compliance

Implements all Lightning Network specifications (BOLT 1-11) including base protocol, channel management, onion routing, and invoice protocols.

Multiple Backend Support

Works with various Bitcoin node implementations including btcd full nodes, bitcoind, and neutrino light clients for flexible deployment options.

Developer APIs

Provides both HTTP REST API and gRPC interfaces for application development, with comprehensive documentation and client libraries.

package main

import (
	"context"
	"crypto/tls"
	"fmt"
	"log"

	"google.golang.org/grpc"
	"google.golang.org/grpc/credentials"
	"github.com/lightningnetwork/lnd/lnrpc"
)

func main() {
	// Load TLS credentials
	creds, err := credentials.NewClientTLSFromFile("tls.cert", "")
	if err != nil {
		log.Fatal(err)
	}

	// Connect to LND
	conn, err := grpc.Dial("localhost:10009", grpc.WithTransportCredentials(creds))
	if err != nil {
		log.Fatal(err)
	}
	defer conn.Close()

	// Create Lightning client
	client := lnrpc.NewLightningClient(conn)

	// Get node info
	resp, err := client.GetInfo(context.Background(), &lnrpc.GetInfoRequest{})
	if err != nil {
		log.Fatal(err)
	}

	fmt.Printf("Node Alias: %s\n", resp.Alias)
	fmt.Printf("Node Pubkey: %s\n", resp.IdentityPubkey)
	fmt.Printf("Block Height: %d\n", resp.BlockHeight)
	fmt.Printf("Synced to Chain: %t\n", resp.SyncedToChain)
}