Merge pull request #2777 from wpaulino/reject-zombie-anns

channeldb+routing+discovery: reject zombie announcements

channeldb/db.go

@@ -268,6 +268,9 @@ func createChannelDB(dbPath string) error {
 		if _, err := edges.CreateBucket(channelPointBucket); err != nil {
 			return err
 		}
+		if _, err := edges.CreateBucket(zombieBucket); err != nil {
+			return err
+		}
 
 		graphMeta, err := tx.CreateBucket(graphMetaBucket)
 		if err != nil {

channeldb/error.go

@@ -1,6 +1,9 @@
 package channeldb
 
-import "fmt"
+import (
+	"errors"
+	"fmt"
+)
 
 var (
 	// ErrNoChanDBExists is returned when a channel bucket hasn't been
@@ -79,6 +82,10 @@ var (
 	// can't be found.
 	ErrEdgeNotFound = fmt.Errorf("edge not found")
 
+	// ErrZombieEdge is an error returned when we attempt to look up an edge
+	// but it is marked as a zombie within the zombie index.
+	ErrZombieEdge = errors.New("edge marked as zombie")
+
 	// ErrEdgeAlreadyExist is returned when edge with specific
 	// channel id can't be added because it already exist.
 	ErrEdgeAlreadyExist = fmt.Errorf("edge already exist")