From bab187e963dd579f8c495c31c1403d1512b6cbfa Mon Sep 17 00:00:00 2001
From: Jack Grigg <jack@z.cash>
Date: Sat, 1 Oct 2016 01:16:51 +1300
Subject: [PATCH] Disable OP_CODESEPARATOR

---
 src/script/interpreter.cpp | 33 ++++++---------------------------
 1 file changed, 6 insertions(+), 27 deletions(-)

diff --git a/src/script/interpreter.cpp b/src/script/interpreter.cpp
index b83d67d9..ccc98957 100644
--- a/src/script/interpreter.cpp
+++ b/src/script/interpreter.cpp
@@ -289,7 +289,8 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, un
                 opcode == OP_DIV ||
                 opcode == OP_MOD ||
                 opcode == OP_LSHIFT ||
-                opcode == OP_RSHIFT)
+                opcode == OP_RSHIFT ||
+                opcode == OP_CODESEPARATOR)
                 return set_error(serror, SCRIPT_ERR_DISABLED_OPCODE); // Disabled opcodes.
 
             if (fExec && 0 <= opcode && opcode <= OP_PUSHDATA4) {
@@ -814,13 +815,6 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, un
                     popstack(stack);
                     stack.push_back(vchHash);
                 }
-                break;                                   
-
-                case OP_CODESEPARATOR:
-                {
-                    // Hash starts after the code separator
-                    pbegincodehash = pc;
-                }
                 break;
 
                 case OP_CHECKSIG:
@@ -981,27 +975,12 @@ public:
         fHashSingle((nHashTypeIn & 0x1f) == SIGHASH_SINGLE),
         fHashNone((nHashTypeIn & 0x1f) == SIGHASH_NONE) {}
 
-    /** Serialize the passed scriptCode, skipping OP_CODESEPARATORs */
+    /** Serialize the passed scriptCode */
     template<typename S>
     void SerializeScriptCode(S &s, int nType, int nVersion) const {
-        CScript::const_iterator it = scriptCode.begin();
-        CScript::const_iterator itBegin = it;
-        opcodetype opcode;
-        unsigned int nCodeSeparators = 0;
-        while (scriptCode.GetOp(it, opcode)) {
-            if (opcode == OP_CODESEPARATOR)
-                nCodeSeparators++;
-        }
-        ::WriteCompactSize(s, scriptCode.size() - nCodeSeparators);
-        it = itBegin;
-        while (scriptCode.GetOp(it, opcode)) {
-            if (opcode == OP_CODESEPARATOR) {
-                s.write((char*)&itBegin[0], it-itBegin-1);
-                itBegin = it;
-            }
-        }
-        if (itBegin != scriptCode.end())
-            s.write((char*)&itBegin[0], it-itBegin);
+        auto size = scriptCode.size();
+        ::WriteCompactSize(s, size);
+        s.write((char*)&scriptCode.begin()[0], size);
     }
 
     /** Serialize an input of txTo */