1 files changed, 14 insertions, 0 deletions
diff --git a/src/script/script.h b/src/script/script.h
index a2941ce901..0b6d822d81 100644
--- a/src/script/script.h
+++ b/src/script/script.h
@@ -643,6 +643,20 @@ public:
     }
 };
 
+struct CScriptWitness
+{
+    // Note that this encodes the data elements being pushed, rather than
+    // encoding them as a CScript that pushes them.
+    std::vector<std::vector<unsigned char> > stack;
+
+    // Some compilers complain without a default constructor
+    CScriptWitness() { }
+
+    bool IsNull() const { return stack.empty(); }
+
+    std::string ToString() const;
+};
+
 class CReserveScript
 {
 public: