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6. The init Function

One-time package initialization on deployment.

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The `init` function runs exactly once when a package is published on-chain. It takes a `&mut TxContext` (or a One-Time Witness) and initializes administrative capabilities or shared states.

move
fun init(ctx: &mut TxContext) {
    let admin_cap = AdminCap { id: object::new(ctx) };
    transfer::transfer(admin_cap, ctx.sender());
}

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Check your understanding

1. When does a module's init function execute?
Automatically, exactly once when the package is publishedOn every transactionWhen called by an adminNever
2. Can a module's init function be invoked manually after deployment?
No, it cannot be called by external transactions after deploymentYes, with admin keyYes, via CPIAnytime

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