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Functions · easy

5. Function Visibility: public, entry, and private

Controlling invocation boundaries in Move.

1 min read2 questionsup to 50 XPtopic 5/25

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- `fun`: Private helper, callable only within the defining module. - `public fun`: Callable by other Move modules and programmable transaction blocks. - `entry fun`: Callable directly as transaction entrypoints from client SDKs/wallets. - `public(package) fun`: Visible across modules inside the same package.

How to study this topic

  1. 1. Read the explanation once end to end, skipping the code.
  2. 2. Re-read the code snippets and say out loud what each line does.
  3. 3. Answer the quiz without scrolling back — that is the real check.
  4. 4. Read every explanation, even for the answers you got right.

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Check your understanding

  1. 1. Which visibility modifier allows a function to be invoked directly by a wallet transaction?

  2. 2. Can a function be both public and an entry function?

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