Enhance NFT Integration and Add Attendance Verification

[mubarak23]

The contract has partial NFT integration and mentions attendance tracking but lacks full implementation.
Current Issues

deploy_event_nft() exists but is never called
EventAttendanceMark event is defined but never emitted
NFT contract address in registration is set to attendee address (incorrect)
No attendance verification system

Proposed Enhancements

Automatic NFT minting upon successful registration
Attendance verification system with QR codes or similar
NFT metadata integration
Attendance-based NFT rewards

Acceptance Criteria

Integrate NFT deployment in add_event() or _create_event()
Implement proper NFT minting for registered attendees
Add attendance marking functionality
Create attendance verification system
Update EventRegistration to properly track NFT details
Add functions to query NFT-related data
Implement attendance-based rewards or special NFTs

Technical Implementation

fn mark_attendance(ref self: ContractState, event_id: u256, attendee: ContractAddress) {
    // Verify caller is event owner or authorized
    // Verify attendee is registered
    // Mark attendance in storage
    // Emit EventAttendanceMark event
    // Potentially mint special attendance NFT
}

[MarcusDavidG]

Gm @mubarak23, my name is Marcus David. I’m a smart contract and frontend developer.

I’d like to work on Issue #193: Enhance NFT Integration and Add Attendance Verification. I have experience with NFT minting, event-based smart contracts, and access control.

I’ll:

Integrate NFT minting into event creation

Implement mark_attendance with proper checks and event emission

Fix registration to track NFT details correctly

Add attendance-based NFT rewards

Cover all logic with tests

ETA: 48 hours.

Looking forward to contributing. Thanks!

[mubarak23]

@MarcusDavidG please let endeavour to submit draft PR before the end of the day