Implement Complete Campaign Logic Contract

[0xdevcollins]

Overview

Implement the logic for completing a campaign in the Boundless smart contract. This feature will mark a campaign as completed by changing its status and emitting an event to notify listeners. 🚀

Background

The function to be implemented is defined in contracts/boundless/src/logic/campaign.rs under the CampaignManagement trait. The goal is to update the campaign status to Completed in storage, after performing necessary checks such as verifying the admin's authorization.

Requirements

1. Admin Authorization

   • Verify that the provided admin address is authorized to complete the campaign.

2. Campaign Retrieval

   • Retrieve the campaign from storage using the provided campaign_id.
   • Handle cases where the campaign does not exist or is in an unexpected state.

3. Status Update

   • Update the campaign's status to Completed as defined by the Status enum in datatypes.rs.
   • Save the updated campaign back to storage.

4. Event Emission

   • Emit an event to signal that the campaign has been successfully completed.

5. Error Handling

   • Use appropriate error handling by returning a BoundlessError if any of the checks fail or other issues are encountered.

Technical Considerations

• Ensure that the logic respects the integrity of data stored in Campaign and related data types.
• Maintain consistency with the existing contract coding style and error handling as observed in other functions.
• Double-check that the event emission methodology aligns with other events defined in the project for uniformity.

Acceptance Criteria

• The complete_campaign function verifies admin authorization correctly.
• The campaign is successfully retrieved and its status updated to Completed.
• The updated campaign is stored in the blockchain storage.
• A campaign completion event is emitted after successfully updating the campaign.
• All error cases (e.g., unauthorized admin, missing campaign) are handled gracefully.

- All new functionality is covered by tests.

[brisstone]

I would like to implement this feature, kindly assign.

[CMI-James]

Can i take on this issue ?
ETA: 8 hours.