* fix Warning: Unused function parameter. Remove or comment out the variable name to silence this warning.

* fix: shadows another variable error

* fix: Warning: Visibility for constructor is ignored.

* fix: unused local variable warning

* fix: Warning: Function state mutability can be restricted to pure

* Warning: Return value of low-level calls not used.

* fix: Warning: Unnamed return variable can remain unassigned.

* fix: final Warning: Visibility for constructor is ignored. If you want the contract to be non-deployable, making it abstract is sufficient

* implement comments

* fix: change return to address(0) to silence compiler