How to get owner identity in a module?

[egormanga]

There doesn't seem to be an available way of retrieving the owner identity (e.g. for reducer caller checks) inside the module.

There's ctx.identity() which is the module identity, useful for self-calling checks — that is, scheduled reducers. But there's no equivalent ctx.owner for checking when the module owner calls the reducer (e.g. with the CLI).

Is there another way to check this, apart from hard-coding the value?

[bfops]

Hey @egormanga! It's not the clearest UX, but you can get the module owner in the init reducer:

#[spacetimedb::reducer(init)]
pub fn init(ctx: &ReducerContext) {
    log::info!("module owner: {}", ctx.sender);
}

[egormanga]

Thank you! This should probably be documented, at least as a note in the module reference.

Is it possible to save it from there, though? There are no module-global variables, is the only way is to store it in a table?

[bfops]

Yeah, you'll have to store it in a table.

I'll make a ticket to document this.

Edit: #3229