subserver: add faraday

subservers/faraday.go

@@ -0,0 +1,94 @@
+package subservers
+
+import (
+	"github.com/lightninglabs/faraday"
+	"github.com/lightninglabs/faraday/frdrpc"
+	"github.com/lightninglabs/faraday/frdrpcserver"
+	"github.com/lightninglabs/lndclient"
+	"github.com/lightningnetwork/lnd/lnrpc"
+	"google.golang.org/grpc"
+)
+
+// faradaySubServer implements the SubServer interface.
+type faradaySubServer struct {
+	*frdrpcserver.RPCServer
+
+	remote    bool
+	cfg       *faraday.Config
+	remoteCfg *RemoteDaemonConfig
+}
+
+// A compile-time check to ensure that faradaySubServer implements SubServer.
+var _ SubServer = (*faradaySubServer)(nil)
+
+// NewFaradaySubServer returns a new faraday implementation of the SubServer
+// interface.
+func NewFaradaySubServer(cfg *faraday.Config, rpcCfg *frdrpcserver.Config,
+	remoteCfg *RemoteDaemonConfig, remote bool) SubServer {
+
+	return &faradaySubServer{
+		RPCServer: frdrpcserver.NewRPCServer(rpcCfg),
+		cfg:       cfg,
+		remoteCfg: remoteCfg,
+		remote:    remote,
+	}
+}
+
+// Name returns the name of the sub-server.
+//
+// NOTE: this is part of the SubServer interface.
+func (f *faradaySubServer) Name() string {
+	return FARADAY
+}
+
+// Remote returns true if the sub-server is running remotely and so
+// should be connected to instead of spinning up an integrated server.
+//
+// NOTE: this is part of the SubServer interface.
+func (f *faradaySubServer) Remote() bool {
+	return f.remote
+}
+
+// RemoteConfig returns the config required to connect to the sub-server
+// if it is running in remote mode.
+//
+// NOTE: this is part of the SubServer interface.
+func (f *faradaySubServer) RemoteConfig() *RemoteDaemonConfig {
+	return f.remoteCfg
+}
+
+// Start starts the sub-server in integrated mode.
+//
+// NOTE: this is part of the SubServer interface.
+func (f *faradaySubServer) Start(_ lnrpc.LightningClient,
+	lndGrpc *lndclient.GrpcLndServices, withMacaroonService bool) error {
+
+	return f.StartAsSubserver(
+		lndGrpc.LndServices, withMacaroonService,
+	)
+}
+
+// RegisterGrpcService must register the sub-server's GRPC server with the given
+// registrar.
+//
+// NOTE: this is part of the SubServer interface.
+func (f *faradaySubServer) RegisterGrpcService(service grpc.ServiceRegistrar) {
+	frdrpc.RegisterFaradayServerServer(service, f)
+}
+
+// ServerErrChan returns an error channel that should be listened on after
+// starting the sub-server to listen for any runtime errors. It is optional and
+// may be set to nil. This only applies in integrated mode.
+//
+// NOTE: this is part of the SubServer interface.
+func (f *faradaySubServer) ServerErrChan() chan error {
+	return nil
+}
+
+// MacPath returns the path to the sub-server's macaroon if it is not running in
+// remote mode.
+//
+// NOTE: this is part of the SubServer interface.
+func (f *faradaySubServer) MacPath() string {
+	return f.cfg.MacaroonPath
+}

subservers/subserver.go

@@ -11,8 +11,9 @@ import (
 )
 
 const (
-	LND string = "lnd"
-	LIT string = "lit"
+	LND     string = "lnd"
+	LIT     string = "lit"
+	FARADAY string = "faraday"
 )
 
 // subServerWrapper is a wrapper around the SubServer interface and is used by