multi: use "bitcoin" chain name constant

Make use of the `bitcoinChainName` constant instead of re-writing the
"bitcoin" string.

cmd/lncli/main.go

@@ -15,6 +15,7 @@ import (
 	"syscall"
 
 	"github.com/btcsuite/btcd/btcutil"
+	"github.com/lightningnetwork/lnd"
 	"github.com/lightningnetwork/lnd/build"
 	"github.com/lightningnetwork/lnd/lncfg"
 	"github.com/lightningnetwork/lnd/lnrpc"
@@ -301,8 +302,8 @@ func extractPathArgs(ctx *cli.Context) (string, string, error) {
 		// lnddir/data/chain/<chain>/<network> in order to fetch the
 		// macaroon that we need.
 		macPath = filepath.Join(
-			lndDir, defaultDataDir, defaultChainSubDir, "bitcoin",
-			network, defaultMacaroonFilename,
+			lndDir, defaultDataDir, defaultChainSubDir,
+			lnd.BitcoinChainName, network, defaultMacaroonFilename,
 		)
 	}
 

config.go

@@ -259,7 +259,7 @@ var (
 	defaultBtcdDir         = btcutil.AppDataDir(btcdBackendName, false)
 	defaultBtcdRPCCertFile = filepath.Join(defaultBtcdDir, "rpc.cert")
 
-	defaultBitcoindDir = btcutil.AppDataDir("bitcoin", false)
+	defaultBitcoindDir = btcutil.AppDataDir(BitcoinChainName, false)
 
 	defaultTorSOCKS   = net.JoinHostPort("localhost", strconv.Itoa(defaultTorSOCKSPort))
 	defaultTorDNS     = net.JoinHostPort(defaultTorDNSHost, strconv.Itoa(defaultTorDNSPort))
@@ -1811,7 +1811,7 @@ func parseRPCParams(cConfig *lncfg.Chain, nodeConfig interface{},
 		daemonName = bitcoindBackendName
 		confDir = conf.Dir
 		confFile = conf.ConfigPath
-		confFileBase = "bitcoin"
+		confFileBase = BitcoinChainName
 
 		// Check that cookie and credentials don't contradict each
 		// other.

lntest/node/config.go

@@ -11,6 +11,7 @@ import (
 	"sync/atomic"
 
 	"github.com/btcsuite/btcd/chaincfg"
+	"github.com/lightningnetwork/lnd"
 	"github.com/lightningnetwork/lnd/chanbackup"
 	"github.com/lightningnetwork/lnd/kvdb/etcd"
 	"github.com/lightningnetwork/lnd/lntest/wait"
@@ -157,7 +158,7 @@ func (cfg BaseNodeConfig) DBPath() string {
 
 func (cfg BaseNodeConfig) ChanBackupPath() string {
 	return filepath.Join(
-		cfg.DataDir, "chain", "bitcoin",
+		cfg.DataDir, "chain", lnd.BitcoinChainName,
 		fmt.Sprintf(
 			"%v/%v", cfg.NetParams.Name,
 			chanbackup.DefaultBackupFileName,

lntest/node/harness_node.go

@@ -18,6 +18,7 @@ import (
 	"time"
 
 	"github.com/jackc/pgx/v4/pgxpool"
+	"github.com/lightningnetwork/lnd"
 	"github.com/lightningnetwork/lnd/lnrpc"
 	"github.com/lightningnetwork/lnd/lntest/rpc"
 	"github.com/lightningnetwork/lnd/lntest/wait"
@@ -107,7 +108,7 @@ func NewHarnessNode(t *testing.T, cfg *BaseNodeConfig) (*HarnessNode, error) {
 	cfg.TLSKeyPath = filepath.Join(cfg.BaseDir, "tls.key")
 
 	networkDir := filepath.Join(
-		cfg.DataDir, "chain", "bitcoin", cfg.NetParams.Name,
+		cfg.DataDir, "chain", lnd.BitcoinChainName, cfg.NetParams.Name,
 	)
 	cfg.AdminMacPath = filepath.Join(networkDir, "admin.macaroon")
 	cfg.ReadMacPath = filepath.Join(networkDir, "readonly.macaroon")