channeldb: export now function

To allow mocking when testing other packages.

channeldb/db.go

@@ -137,7 +137,8 @@ type DB struct {
 	*bbolt.DB
 	dbPath string
 	graph  *ChannelGraph
-	now    func() time.Time
+
+	Now func() time.Time
 }
 
 // Open opens an existing channeldb. Any necessary schemas migrations due to
@@ -171,7 +172,7 @@ func Open(dbPath string, modifiers ...OptionModifier) (*DB, error) {
 	chanDB := &DB{
 		DB:     bdb,
 		dbPath: dbPath,
-		now:    time.Now,
+		Now:    time.Now,
 	}
 	chanDB.graph = newChannelGraph(
 		chanDB, opts.RejectCacheSize, opts.ChannelCacheSize,

channeldb/invoice_test.go

@@ -337,7 +337,7 @@ func TestDuplicateSettleInvoice(t *testing.T) {
 	if err != nil {
 		t.Fatalf("unable to make test db: %v", err)
 	}
-	db.now = func() time.Time { return time.Unix(1, 0) }
+	db.Now = func() time.Time { return time.Unix(1, 0) }
 
 	// We'll start out by creating an invoice and writing it to the DB.
 	amt := lnwire.NewMSatFromSatoshis(1000)

channeldb/invoices.go

@@ -1244,7 +1244,7 @@ func (d *DB) updateInvoice(hash lntypes.Hash, invoices, settleIndex *bbolt.Bucke
 	// Update invoice state.
 	invoice.State = update.State
 
-	now := d.now()
+	now := d.Now()
 
 	// Update htlc set.
 	for key, htlcUpdate := range update.Htlcs {