diff --git a/core/evm.go b/core/evm.go
index 4346f2d091..a97deed4ab 100644
--- a/core/evm.go
+++ b/core/evm.go
@@ -33,7 +33,10 @@ import (
 type ChainContext interface {
 	// Engine retrieves the chain's consensus engine.
 	Engine() consensus.Engine
-
+	// SYSCOIN
+	ReadSYSHash(uint64) []byte
+	ReadDataHash(common.Hash) []byte
+	GetNEVMAddress(common.Address) []byte
 	// GetHeader returns the header corresponding to the hash/number argument pair.
 	GetHeader(common.Hash, uint64) *types.Header
 }