Support Polygon Boundary Selection for Land Registration via Map Interface

[onlydustapp]

📚 Overview

This feature enhances the Land Registry system by allowing users to register land using polygon boundaries rather than a single coordinate. The update will improve realism and verification against real-world land boundaries.

🔍 Background

Currently, the Land Registry smart contract uses the Location struct that supports only a single latitude/longitude pair, which is insufficient for representing actual land boundaries. With this update, users will be able to select multiple points on a map to form polygon boundaries. This effort will involve modifications to the smart contract, frontend UI, validation logic, and tests.

🛠️ Requirements & Tasks

1. Smart Contract Updates:

   • Refactor the Location data structure to support a list of coordinates (Polygon) with a minimum of 3 points.
   • Introduce new structs as proposed:
     • Coordinate with latitude and longitude.
     • Polygon containing an array of Coordinate.
   • Update contract events, functions, and data indexing logic to work with the new structure.
   • Implement validations ensuring the submitted coordinates form a closed polygon.

2. Frontend Updates:

   • Update the map interface to allow users to select multiple points for defining land boundaries.
   • Ensure the UI guides users to select at least 3 coordinates for a valid polygon.

3. Testing:

   • Update or create new tests to validate the new registration flow with polygon boundaries.

4. Migration/Backward Compatibility (if needed):

   • Provide logic to handle or migrate existing land records stored with the old structure.

⚙️ Definition of Done

• Land can be registered with a polygon boundary comprising 3 or more coordinates.
• Coordinates selection is implemented and functional on the frontend map interface.
• All contract and frontend changes are thoroughly tested and deployed.
• The indexer (if applicable) supports the new location format.

📄 References

For additional context, refer to the README on project setup and architecture.

Let's get this feature rolled out to improve the accuracy and validity of our land registration process! 🚀

[SoarinSkySagar]

I am a cairo smart contract developer since 2024, and have worked on many such issues. I would really like to take this up.
eta: 2 days

[She-ge]

Hi, let me solve this issue, I'll love to work on this task

[Godsmiracle001]

Hello Maintainer, please can i tackle this?