0

I noticed from this answer that there's two ways of separating Contract code with state variables: Inheritance (class Contract is XY {}) or Reference (otherClass = new OtherClass())

I'm wondering what are the pros/cons of using one over the other.

In my mind, I expect initialising a new Contract() to be more expensive since it sounds like it's deploying; yet in that answer, he explains that all the contracts compile down to one in the end, so perhaps it is not more/less expensive.

So why would you choose one over the other?

Improve this question
4
  • you split contracts in multiple instances when they execute different functionality. And therefore can be reused by other contracts efficiently
    – Nulik
    Commented Jul 19, 2021 at 1:25
  • @Nulik thanks, I understand that. My question is what are the pros and cons of each. i.e. why should I use inheritence vs new Contract()
    – HJo
    Commented Jul 19, 2021 at 14:45
  • this is more like OOP question, I suggest Java forums, or C++
    – Nulik
    Commented Jul 19, 2021 at 17:02
  • I see. I wasn't aware that the second design I was referring to was composition pattern, have looked into that now.
    – HJo
    Commented Jul 19, 2021 at 23:14

1 Answer 1

Reset to default
1

Depends on the design of the project. You will see the difference when you work on a project or you go through a project step by step.

I remember there is a limitation if you wanna use inheritance contracts "Linearization of inheritance graph impossible" https://docs.soliditylang.org/en/v0.8.6/contracts.html#multiple-inheritance-and-linearization

The size: it could be exceeded the maximum size for a contract because of duplications, for example.

Check the the access classifiers when use new contract() see the example https://docs.soliditylang.org/en/v0.8.6/contracts.html#visibility-and-getters

Improve this answer

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.