payd cotract additions and implementation

[Akatenvictor]

Pull Request

Summary

What Changed

Checklist

• I linked the relevant issue(s) in the summary.
• I added or updated tests for the change.
• I ran the relevant test suite locally.
• I updated documentation where needed, or explained why it was not needed.
• If this change touches the UI, I verified responsive behavior and accessibility.
• I included screenshots, logs, or other proof when they help review.

Testing

Documentation

Accessibility / Responsiveness

Notes

Closes #902
Closes #889
Closes #887
Closes #911