1 files changed, 12 insertions, 1 deletions
diff --git a/packages/types/src/index.ts b/packages/types/src/index.ts
index f28c2f9a3..055c47e0a 100644
--- a/packages/types/src/index.ts
+++ b/packages/types/src/index.ts
@@ -58,7 +58,18 @@ export interface DataItem {
     components?: DataItem[];
 }
 
-export type OpCode = string;
+export enum OpCode {
+    DelegateCall = 'DELEGATECALL',
+    Revert = 'REVERT',
+    Create = 'CREATE',
+    Stop = 'STOP',
+    Invalid = 'INVALID',
+    CallCode = 'CALLCODE',
+    StaticCall = 'STATICCALL',
+    Return = 'RETURN',
+    Call = 'CALL',
+    SelfDestruct = 'SELFDESTRUCT',
+}
 
 export interface StructLog {
     depth: number;