Implementing check mask

[Hardcode3]

📌 Implementing check mask

📄 Description

Describe the changes made and the motivation behind them. Include any relevant context or background information.

🧩 Type of Change

Select the type of change your pull request introduces by removing unnecessary items.

• 🐛 Bug fix
• ✨ New feature
• 📝 Documentation update
• 🔨 Refactoring
• ✅ Test addition or update
• 🚀 Performance improvement
• 🔧 Build or CI/CD configuration
• 🧹 Code cleanup
• ⚠️ Breaking change
• 🧱 Chore

📊 Severity

Indicate the potential impact of this change:

• 🟢 Low: Minor changes, unlikely to affect users
• 🟡 Medium: Changes may affect functionality, but are localized and tested
• 🟠 High: Major impact on core functionality, requires careful review
• 🔴 Critical: Breaking change or affects many areas of the system

🔖 Release

Select the type of release this PR corresponds to:

• 🩹 Patch — Backward-compatible bug fix
• 🧪 Minor — Backward-compatible feature
• 💥 Major — Breaking change
• 🚫 None — Does not affect the public API or functionality

🗒️ Changelog Entry

If applicable, describe what should appear in the changelog.

- Added: Feature X that allows users to Y.
- Fixed: Bug in Z that caused incorrect behavior.

🔗 Related Issues

Reference any issues this pull request addresses.

• Closes #123
• Fixes #456

🧪 Testing

Explain how the changes were tested. Include details about test cases, environments, and any tools used.

✅ Checklist

Please ensure the following before requesting a review:

• I have reviewed my own code before submitting.
• My code follows the project's coding standards.
• I have commented my code, particularly in hard-to-understand areas.
• Documentation has been updated to reflect the changes.
• I have added tests proving that my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• I have checked my code for security vulnerabilities.
• The pull request title is clear and concise.
• I have reviewed the content of this pull request.

📝 Additional Notes

Include any other relevant information or context for reviewers.