Introduce Transient Permission in Access Controller

[kingster-will]

Description

This PR introduces transient permissions in the Access Controller, allowing users to set one-time use permissions that only take effect in the current transaction. This feature enhances the flexibility and security of the permission management system.

Key Changes

• Transient Permission Implementation: Added functionality to set and check transient permissions that are valid only for the current transaction.

[kingster-will]

Hey @berndartmueller,
Could you please help to review this PR?

[berndartmueller]

Hey @berndartmueller, Could you please help to review this PR?

Hey @kingster-will! Sure, I'm just a bit behind on chores, so please allow me some time to review it. I'll try to get to it next week.

[berndartmueller]

Hey @kingster-will! I reviewed the changes and have a question.

I noticed that once a transient permission is set in the current tx, it's not possible anymore that a previously set (permanent) permission is used during this very same tx. checkPermission(..) only verifies transient permissions due to _usingTransientPermission() returning true once a transient permission is set. Is this intentional?

[kingster-will]

Hey @kingster-will! I reviewed the changes and have a question.

I noticed that once a transient permission is set in the current tx, it's not possible anymore that a previously set (permanent) permission is used during this very same tx. checkPermission(..) only verifies transient permissions due to _usingTransientPermission() returning true once a transient permission is set. Is this intentional?

Hey @berndartmueller ,

Yes, this is intentional. When the IP owner sets a one-time (transient) permission in the current transaction, all permanent permissions are ignored for that transaction. This prevents confusion when checking permissions by avoiding the combination of transient and permanent permissions, ensuring straightforward permission management.