lncfg+lnd: prefix etcd db with only network name instead of full path

config.go

@@ -1102,6 +1102,10 @@ func (c *Config) localDatabaseDir() string {
 		normalizeNetwork(activeNetParams.Name))
 }
 
+func (c *Config) networkName() string {
+	return normalizeNetwork(activeNetParams.Name)
+}
+
 // CleanAndExpandPath expands environment variables and leading ~ in the
 // passed path, cleans the result, and returns it.
 // This function is taken from https://github.com/btcsuite/btcd

lncfg/db.go

@@ -2,7 +2,6 @@ package lncfg
 
 import (
 	"fmt"
-	"path"
 
 	"github.com/lightningnetwork/lnd/channeldb/kvdb"
 )
@@ -51,11 +50,12 @@ func (db *DB) Validate() error {
 }
 
 // GetBackend returns a kvdb.Backend as set in the DB config.
-func (db *DB) GetBackend(dbPath string) (kvdb.Backend, error) {
+func (db *DB) GetBackend(dbPath string, networkName string) (
+	kvdb.Backend, error) {
+
 	if db.Backend == etcdBackend {
 		// Prefix will separate key/values in the db.
-		prefix := path.Join(dbPath, dbName)
-		return kvdb.GetEtcdBackend(prefix, db.Etcd)
+		return kvdb.GetEtcdBackend(networkName, db.Etcd)
 	}
 
 	return kvdb.GetBoltBackend(dbPath, dbName, db.Bolt.NoFreeListSync)

lnd.go

@@ -250,7 +250,9 @@ func Main(cfg *Config, lisCfg ListenerCfg, shutdownChan <-chan struct{}) error {
 	ltndLog.Infof("Opening the main database, this might take a few " +
 		"minutes...")
 
-	chanDbBackend, err := cfg.DB.GetBackend(cfg.localDatabaseDir())
+	chanDbBackend, err := cfg.DB.GetBackend(
+		cfg.localDatabaseDir(), cfg.networkName(),
+	)
 	if err != nil {
 		ltndLog.Error(err)
 		return err