diff --git a/core/interface.go b/core/interface.go
index a24bbc0..6ed305c 100644
--- a/core/interface.go
+++ b/core/interface.go
@@ -66,6 +66,7 @@ type TracerResult interface {
 	CaptureState(pc uint64, op OpCode, gas, cost uint64, scope ScopeContext, rData []byte, depth int, err error)
 	CaptureFault(pc uint64, op OpCode, gas, cost uint64, scope ScopeContext, depth int, err error)
 	CaptureEnd(output []byte, gasUsed uint64, t time.Duration, err error)
+	Result() interface{}
 }
 
 type ScopeContext interface {