diff --git a/chainntfs/chainntfs.go b/chainntfs/chainntfs.go
index 2f7a096f0..bc06445a8 100644
--- a/chainntfs/chainntfs.go
+++ b/chainntfs/chainntfs.go
@@ -1,5 +1,7 @@
 package chainntnfs
 
+import "github.com/btcsuite/btcd/wire"
+
 // TODO(roasbeef): finish
 //  * multiple backends for interface
 //   * btcd - websockets
@@ -10,4 +12,14 @@ package chainntnfs
 //   * SPV bloomfilter
 //   * other stuff maybe...
 type ChainNotifier interface {
+	RegisterConfirmationsNotification(txid *wire.ShaHash, numConfs uint32, trigger *NotificationTrigger) error
+	RegisterSpendNotification(outpoint *wire.OutPoint, trigger *NotificationTrigger) error
+
+	Start() error
+	Stop() error
+}
+
+type NotificationTrigger struct {
+	TriggerChan chan struct{}
+	Callback    func()
 }