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content/docs/macros/MV_ENC_FUNC.md

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+---
+weight: 100
+title: "MV_ENC_FUNC"
+description: "Encrypts functions"
+icon: "article"
+date: "2025-05-01T18:47:58-05:00"
+lastmod: "2025-05-01T18:47:58-05:00"
+---
+
+`declare function MV_ENC_FUNC<A..., R...>(vmFunction: (A...) -> R..., encryptKey: string, decryptKey: string): (A...) -> R...`
+
+will virtualize and encrypt the passed function constant with the provided `encryptKey`. Then `decryptKey` is evaluated at runtime to grab the key.
+
+## Valid Usage
+```lua
+local foo = 'ok'
+local total = 0
+
+local getKey = MV_VM(function()
+  -- WARNING: this is just an example! don't do this
+  return "pass" .. "word123"
+end)
+
+for i = 1, 10 do
+  -- referenced upvalues will be captured
+  MV_ENC_FUNC(function()
+    print("in virtualized function # 1", i)
+    total = total + i
+  end, "password123", getKey())()
+end
+
+return total
+```
+{{% alert context="warning" text="**Note**: if your plan doesn't include virtualization support, `MV_ENC_FUNC` is a no-op where the passed function is mangled normally and not virtualized or encrypted!" /%}}
+