cfg: rename legacyprotocol to protocol

Since we are also going to use it for experimental new features.

config.go

@@ -345,7 +345,7 @@ type config struct {
 
 	Watchtower *lncfg.Watchtower `group:"watchtower" namespace:"watchtower"`
 
-	LegacyProtocol *lncfg.LegacyProtocol `group:"legacyprotocol" namespace:"legacyprotocol"`
+	ProtocolOptions *lncfg.ProtocolOptions `group:"protocol" namespace:"protocol"`
 
 	AllowCircularRoute bool `long:"allow-circular-route" description:"If true, our node will allow htlc forwards that arrive and depart on the same channel."`
 }

lncfg/protocol_legacy_off.go

@@ -2,21 +2,21 @@
 
 package lncfg
 
-// LegacyProtocol is a struct that we use to be able to test backwards
+// ProtocolOptions is a struct that we use to be able to test backwards
 // compatibility of protocol additions, while defaulting to the latest within
-// lnd.
-type LegacyProtocol struct {
+// lnd, or to enable experimental protocol changes.
+type ProtocolOptions struct {
 }
 
 // LegacyOnion returns true if the old legacy onion format should be used when
 // we're an intermediate or final hop. This controls if we set the
 // TLVOnionPayloadOptional bit or not.
-func (l *LegacyProtocol) LegacyOnion() bool {
+func (l *ProtocolOptions) LegacyOnion() bool {
 	return false
 }
 
-// LegacyOnion returns true if the old commitment format should be used for new
-// funded channels.
-func (l *LegacyProtocol) LegacyCommitment() bool {
+// LegacyCommitment returns true if the old commitment format should be used
+// for new funded channels.
+func (l *ProtocolOptions) LegacyCommitment() bool {
 	return false
 }

lncfg/protocol_legacy_on.go

@@ -2,14 +2,14 @@
 
 package lncfg
 
-// LegacyProtocol is a struct that we use to be able to test backwards
+// ProtocolOptions is a struct that we use to be able to test backwards
 // compatibility of protocol additions, while defaulting to the latest within
-// lnd.
-type LegacyProtocol struct {
-	// Onion if set to true, then we won't signal TLVOnionPayloadOptional.
-	// As a result, nodes that include us in the route won't use the new
-	// modern onion framing.
-	Onion bool `long:"onion" description:"force node to not advertise the new modern TLV onion format"`
+// lnd, or to enable experimental protocol changes.
+type ProtocolOptions struct {
+	// LegacyOnionFormat if set to true, then we won't signal
+	// TLVOnionPayloadOptional. As a result, nodes that include us in the
+	// route won't use the new modern onion framing.
+	LegacyOnionFormat bool `long:"legacyonion" description:"force node to not advertise the new modern TLV onion format"`
 
 	// CommitmentTweak guards if we should use the old legacy commitment
 	// protocol, or the newer variant that doesn't have a tweak for the
@@ -21,12 +21,12 @@ type LegacyProtocol struct {
 // LegacyOnion returns true if the old legacy onion format should be used when
 // we're an intermediate or final hop. This controls if we set the
 // TLVOnionPayloadOptional bit or not.
-func (l *LegacyProtocol) LegacyOnion() bool {
-	return l.Onion
+func (l *ProtocolOptions) LegacyOnion() bool {
+	return l.LegacyOnionFormat
 }
 
-// LegacyOnion returns true if the old commitment format should be used for new
-// funded channels.
-func (l *LegacyProtocol) LegacyCommitment() bool {
+// LegacyCommitment returns true if the old commitment format should be used
+// for new funded channels.
+func (l *ProtocolOptions) LegacyCommitment() bool {
 	return l.CommitmentTweak
 }

lntest/itest/lnd_test.go

@@ -982,7 +982,7 @@ func (c commitType) String() string {
 func (c commitType) Args() []string {
 	switch c {
 	case commitTypeLegacy:
-		return []string{"--legacyprotocol.committweak"}
+		return []string{"--protocol.committweak"}
 	case commitTypeTweakless:
 		return []string{}
 	}
@@ -4247,7 +4247,7 @@ func testMultiHopPayments(net *lntest.NetworkHarness, t *harnessTest) {
 	//
 	// First, we'll create Dave and establish a channel to Alice. Dave will
 	// be running an older node that requires the legacy onion payload.
-	daveArgs := []string{"--legacyprotocol.onion"}
+	daveArgs := []string{"--protocol.legacyonion"}
 	dave, err := net.NewNode("Dave", daveArgs)
 	if err != nil {
 		t.Fatalf("unable to create new nodes: %v", err)

server.go

@@ -336,13 +336,13 @@ func newServer(listenAddrs []net.Addr, chanDB *channeldb.DB,
 
 	// Only if we're not being forced to use the legacy onion format, will
 	// we signal our knowledge of the new TLV onion format.
-	if !cfg.LegacyProtocol.LegacyOnion() {
+	if !cfg.ProtocolOptions.LegacyOnion() {
 		globalFeatures.Set(lnwire.TLVOnionPayloadOptional)
 	}
 
 	// Similarly, we default to the new modern commitment format unless the
 	// legacy commitment config is set to true.
-	if !cfg.LegacyProtocol.LegacyCommitment() {
+	if !cfg.ProtocolOptions.LegacyCommitment() {
 		globalFeatures.Set(lnwire.StaticRemoteKeyOptional)
 	}
 
@@ -375,8 +375,8 @@ func newServer(listenAddrs []net.Addr, chanDB *channeldb.DB,
 	)
 
 	featureMgr, err := feature.NewManager(feature.Config{
-		NoTLVOnion:        cfg.LegacyProtocol.LegacyOnion(),
-		NoStaticRemoteKey: cfg.LegacyProtocol.LegacyCommitment(),
+		NoTLVOnion:        cfg.ProtocolOptions.LegacyOnion(),
+		NoStaticRemoteKey: cfg.ProtocolOptions.LegacyCommitment(),
 	})
 	if err != nil {
 		return nil, err