Implement get_campaign_backers Functionality in Contract

[0xdevcollins]

Overview

Implement the logic to retrieve campaign backers in the smart contract for the Boundless platform. This function is crucial for allowing users to view all the backers of a given campaign.

🗂 Background

The function to be implemented is located in:

• File: contracts/boundless/src/logic/campaign.rs
• Relevant trait in: contracts/boundless/src/interface.rs
• Data types are defined in: contracts/boundless/src/datatypes.rs

🛠️ Requirements

• Location: Implement the logic inside CampaignManagement trait for BoundlessContract.

• Logic Steps:

  1. Retrieve the campaign from storage using the provided campaign_id.
  2. Extract and return the list of backers from the campaign data.
  3. Properly handle error cases (e.g., when the campaign does not exist).

• Current Placeholder: Currently, the function returns an empty vector using a placeholder Ok(Vec::new(&env)).

📌 Technical Considerations

• Ensure that the function correctly interacts with the existing storage mechanism for retrieving campaign data.
• Maintain consistency with the error handling as defined by BoundlessError in the project.
• Validate input parameters as necessary.
• Consider potential edge cases such as a campaign with no backers.

✅ Definition of Done

• The function successfully retrieves and returns a list of backers for a given campaign.
• Proper error handling is implemented when the campaign is not found or other errors occur.
• Code is reviewed and merged following project guidelines.

- All new functionality is covered by tests.

[nahaktarun]

Hi @0xdevcollins I'm interested in working on the issue please help assign the issue

[0xdevcollins]

@nahaktarun what's the update on this issue?
I will unassign in few hours if no update is provided