Top 5 Bugs from Fuel Attackathon 33351-2.rs

// main.sw

contract;

mod ownable;
use ownable::*;

storage {
    owner: b256 = b256::zero(),
}

abi MyAbi : Ownable {
    #[storage(read, write)]
    fn init();

    #[storage(read)]
    fn owner() -> b256;
}

impl StorageHelpers for Contract {
    #[storage(read)]
    fn get_owner() -> b256 {
        storage.owner.read()
    }

    #[storage(write)]
    fn set_owner(owner: b256) {
        storage.owner.write(owner)
    }
}

impl Ownable for Contract { }

impl MyAbi for Contract {

    #[storage(read, write)]
    fn init() {
        Self::set_owner(ContractId::this().into());
    }

    #[storage(read)]
    fn owner() -> b256 {
        return Self::get_owner();

    }
}

abi Test {
    fn renounce_ownership();
}

#[test]
fn test() {
    let callerA = abi(MyAbi, CONTRACT_ID);

    callerA.init(); 

    assert(callerA.owner() == CONTRACT_ID);

    let callerB = abi(Test, CONTRACT_ID);

    callerB.renounce_ownership();  // ! Externally available

    assert(callerA.owner() != CONTRACT_ID);
    assert(callerA.owner() == b256::zero());
}