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Global Storage · easy

3. Global Storage Operators (move_to, borrow_global, move_from)

Managing state under account addresses.

1 min read3 questionsup to 50 XPtopic 3/10

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Core Move manages account state with 5 native global storage operators: - `move_to(signer, resource)`: Publishes a resource under the signer's address. - `borrow_global<T>(address)`: Reads an immutable reference to `T` at address. - `borrow_global_mut<T>(address)`: Borrows a mutable reference to `T` at address. - `move_from<T>(address)`: Removes and returns `T` from address storage. - `exists<T>(address)`: Returns true if `T` is stored under address.

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 operator removes a resource from an account's storage and returns it?

  2. 2. What happens if borrow_global<T>(addr) is called on an address where T does not exist?

  3. 3. Which operator publishes a resource to an account?

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