Reentrancy-guard or complying with the CEI paradigm

[CARDIN00]

Description

Integrations Checklist

• Have any function signatures changed? If yes, outline below.
  The following functions are changed
  unzap Function
  zap Function

• Have any features changed or been added? If yes, outline below.
  1;Added Reentrancy Protection:
  2;Validated Destination Addresses:

• Have any events changed or been added? If yes, outline below.

• Has all documentation been updated?

Changelog

Function Signature Changes

Features

1:Added Reentrancy Protection:
Ensured the function includes a nonReentrant modifier to safeguard against reentrant calls.

2:Validated Destination Addresses:
Added checks to validate that the recipient address is non-zero and expected.

3:Improved Ether Transfer Handling:
If Ether transfers occur in zap, the pull-over-push pattern would replace direct transfers.

Events

[CARDIN00]

1:The nonReentrant modifier blocks potential reentrancy attacks during Ether transfers
2:Validation of Addresses, Prevents sending Ether to invalid or unintended addresses.
3:By adopting the pull-over-push pattern, Ether is transferred securely, and only intended recipients can withdraw funds.

[CARDIN00]

Updated the Unzap function