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diff --git a/src/script_lua.h b/src/script_lua.h
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+/*
+ * Copyright (c) 2009-2021, Redis Ltd.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   * Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *   * Neither the name of Redis nor the names of its contributors may be used
+ *     to endorse or promote products derived from this software without
+ *     specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __SCRIPT_LUA_H_
+#define __SCRIPT_LUA_H_
+
+/*
+ * script_lua.c unit provides shared functionality between
+ * eval.c and function_lua.c. Functionality provided:
+ *
+ * * Execute Lua code, assuming that the code is located on
+ *   the top of the Lua stack. In addition, parsing the execution
+ *   result and convert it to the resp and reply ot the client.
+ *
+ * * Run Redis commands from within the Lua code (Including
+ *   parsing the reply and create a Lua object out of it).
+ *
+ * * Register Redis API to the Lua interpreter. Only shared
+ *   API are registered (API that is only relevant on eval.c
+ *   (like debugging) are registered on eval.c).
+ *
+ * Uses script.c for interaction back with Redis.
+ */
+
+#include "server.h"
+#include "script.h"
+#include <lua.h>
+#include <lauxlib.h>
+#include <lualib.h>
+
+#define REGISTRY_RUN_CTX_NAME "__RUN_CTX__"
+#define REGISTRY_SET_GLOBALS_PROTECTION_NAME "__GLOBAL_PROTECTION__"
+#define REDIS_API_NAME "redis"
+
+typedef struct errorInfo {
+    sds msg;
+    sds source;
+    sds line;
+    int ignore_err_stats_update;
+}errorInfo;
+
+void luaRegisterRedisAPI(lua_State* lua);
+sds luaGetStringSds(lua_State *lua, int index);
+void luaRegisterGlobalProtectionFunction(lua_State *lua);
+void luaSetErrorMetatable(lua_State *lua);
+void luaSetAllowListProtection(lua_State *lua);
+void luaSetTableProtectionRecursively(lua_State *lua);
+void luaRegisterLogFunction(lua_State* lua);
+void luaRegisterVersion(lua_State* lua);
+void luaPushErrorBuff(lua_State *lua, sds err_buff);
+void luaPushError(lua_State *lua, const char *error);
+int luaError(lua_State *lua);
+void luaSaveOnRegistry(lua_State* lua, const char* name, void* ptr);
+void* luaGetFromRegistry(lua_State* lua, const char* name);
+void luaCallFunction(scriptRunCtx* r_ctx, lua_State *lua, robj** keys, size_t nkeys, robj** args, size_t nargs, int debug_enabled);
+void luaExtractErrorInformation(lua_State *lua, errorInfo *err_info);
+void luaErrorInformationDiscard(errorInfo *err_info);
+unsigned long luaMemory(lua_State *lua);
+
+
+#endif /* __SCRIPT_LUA_H_ */