什么是原生函数，我们可以直接调用它们吗？

Question

我在 Move 中遇到过 “原生函数” 一词，但找不到有关它的详细信息. 我听说它们是在 Move 中声明的，但是在外部定义的，通常是在 Rust 中. 这是否意味着它们是钱包或其他模块无法直接调用的内部函数？

mssoni · Answer

Native functions in Move are indeed declared within the language but they dont have a body because theyre implemented outside of Move, usually in Rust. Despite this, if the native function is public, you can call it just like any other function. They arent restricted to internal use only. You can invoke them as long as the necessary permissions and public access are in place.

24p30p · Answer

In Move, a native function is a special kind of function that you declare inside a Move module but don’t actually write in Move language itself—instead, it’s implemented in Rust at the runtime level. These functions are usually used for performance-heavy operations or low-level tasks that can’t be efficiently or securely done in pure Move, like hashing, cryptographic checks, or certain arithmetic operations. While you can use native functions inside your Move modules just like regular functions, you can’t directly call them from a wallet or transaction like a normal entry function. Theyre not exposed for direct user interaction; instead, theyre called internally by the module code you write when needed. If youre building a module and call a native function inside it, users interacting with your module (through transactions or dApps) will indirectly make use of that native function. But the native logic itself runs under-the-hood in the Move VM, handled in Rust, not exposed directly in any way. Here’s a small example of how you might declare a native function: native public fun sha256(data: vector): vector; This tells the Move compiler that sha256 exists, but the actual implementation lives in Rust inside the Sui VM. If you want to read more about native functions in Move and how they tie into the Sui runtime, check out the official docs: https://docs.sui.io/learn/move/native-functions https://github.com/MystenLabs/sui/tree/main/crates/sui-move-natives This is especially useful when youre writing performance-sensitive modules that need cryptographic operations or advanced math.

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什么是原生函数，我们可以直接调用它们吗？

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