Algorand Coding Challenge Submission

What was the bug?
-> Given code after debugging give an error at

*** ptxn.receiver == Global.current application_id ***
and
***Txn.sender, Global.current application address ***
because, above both are comparing the Address type and Application type
=>In (1) expression, ptxn.receiver returns the Address type but Global.current application id returns the application type comparing both gives an error.
=> In (2) expression, op.app_opted_ in method is comparing the T×n.sender(returns Application type) and Global.current_application_address ( returns Address type) here, we are comparing different types of data so we get an error.
How did you fix the bug?
=> To solve (1) we need to use the current_ application_address (returns address type) method in Global class
Global.current application_address }
=> To solve (2) we need to use the current_application id method(returns Application type) in Global class {
Global.current_application_id }

Console Screenshot: