lsat+loopd: add logger

cmd/loopd/log.go

@@ -5,6 +5,7 @@ import (
 	"github.com/lightninglabs/loop"
 	"github.com/lightninglabs/loop/lndclient"
 	"github.com/lightninglabs/loop/loopdb"
+	"github.com/lightninglabs/loop/lsat"
 	"github.com/lightningnetwork/lnd/build"
 )
 
@@ -19,6 +20,7 @@ func init() {
 	addSubLogger("LOOP", loop.UseLogger)
 	addSubLogger("LNDC", lndclient.UseLogger)
 	addSubLogger("STORE", loopdb.UseLogger)
+	addSubLogger(lsat.Subsystem, lsat.UseLogger)
 }
 
 // addSubLogger is a helper method to conveniently create and register the

lsat/log.go

@@ -0,0 +1,26 @@
+package lsat
+
+import (
+	"github.com/btcsuite/btclog"
+	"github.com/lightningnetwork/lnd/build"
+)
+
+// Subsystem defines the sub system name of this package.
+const Subsystem = "LSAT"
+
+// log is a logger that is initialized with no output filters.  This
+// means the package will not perform any logging by default until the caller
+// requests it.
+var log btclog.Logger
+
+// The default amount of logging is none.
+func init() {
+	UseLogger(build.NewSubLogger(Subsystem, nil))
+}
+
+// UseLogger uses a specified Logger to output package logging info.
+// This should be used in preference to SetLogWriter if the caller is also
+// using btclog.
+func UseLogger(logger btclog.Logger) {
+	log = logger
+}