Let us start here, from square one. No, from Zero!

script/api/card.cpp

@@ -0,0 +1,28 @@
+#include "card.h"
+#include "external/LuaBridge.h"
+#include "util/utils.h"
+#include "misc/eamuse.h"
+
+using namespace luabridge;
+
+namespace script::api::card {
+
+    void insert(int index, const std::string &card_hex) {
+
+        // convert to binary
+        uint8_t card_bin[8] {};
+        if (!hex2bin(card_hex.c_str(), card_bin)) {
+            return;
+        }
+
+        // insert card
+        eamuse_card_insert(index & 1, card_bin);
+    }
+
+    void init(lua_State *L) {
+        getGlobalNamespace(L)
+        .beginNamespace("card")
+            .addFunction("insert", insert)
+        .endNamespace();
+    }
+}