SC: Contract Enhancements & Security Improvements

[Pvsaint]

Overview

The group savings contract needs several critical improvements to enhance security, user experience, and operational efficiency. This issue covers all identified problems and proposed solutions.

Critical Security Issues

Emergency Functions

Problem: No emergency mechanisms to handle security breaches, member crises, or operational issues.

Required Functions:

• emergency_pause() / emergency_unpause() - Circuit breaker mechanism
• emergency_withdraw_all() - Return all funds proportionally to members
• emergency_withdraw_member() - Selective member fund recovery
• emergency_complete_round() - Force complete stuck rounds
• emergency_change_recipient() - Change recipient due to member issues
• emergency_cancel_round() - Cancel round and refund contributions
• emergency_recover_tokens() - Recover accidentally sent tokens
• emergency_migrate_funds() - Move funds to new contract if needed

New Storage:

emergency_paused: bool,
pause_reason: felt252,
pause_timestamp: u64,
banned_members: Map<ContractAddress, bool>,

Penalty System

Problem: No consequences for missed contributions, leading to potential free-rider problems.

Phase 1 - Essential Penalties

• Fixed Late Fee System - 2-3% penalty for missed deadlines
• Strike System - Remove members after 2 missed contributions

Phase 2 - Enhanced Penalties

• Grace Period - 24-48 hour buffer after deadline
• Penalty Pool Redistribution - Reward compliant members with collected penalties
• Credit Score System - Track member reliability over time

New Storage:

penalty_config: PenaltyConfig,
member_strikes: Map<ContractAddress, u8>,
security_deposits: Map<ContractAddress, u256>,
penalty_pool: u256,
member_credit_scores: Map<ContractAddress, u8>,

Automated Scheduling

Problem: Manual round creation creates administrative burden and potential delays.

Solutions:

• Pre-planned Schedule - Set up entire rotation cycle at initialization
• Automatic Round Activation - Rounds activate based on timestamps
• Auto Round Completion - Rounds complete automatically when deadline passes
• Rolling Schedule Maintenance - Always maintain 2-3 future rounds

New Functions:

fn setup_auto_schedule(config: AutoScheduleConfig)
fn get_current_active_round() -> u256
fn auto_complete_expired_rounds()
fn maintain_rolling_schedule()

Operational Improvements

Enhanced Member Management

• Member Profile System - Track join date, contribution history, reliability
• Waitlist Management - Queue system for new member applications
• Member Communication - On-chain messaging for important updates

Payment Flexibility (ROSCA-Appropriate)

• Grace Period Implementation - Allow late payments with penalties
• Early Payment Acceptance - Accept contributions before round starts
• Auto-payment Setup - Automatic contribution deductions
• Multiple Token Support - Accept different tokens worth same USD value

Analytics & Reporting

• Contribution Analytics - Track payment patterns and member reliability
• Round Performance Metrics - Success rates, completion times, etc.
• Financial Reporting - Generate contribution summaries and member statements

New Data Structures

struct PenaltyConfig {
    late_fee_percentage: u256,
    grace_period_hours: u64,
    max_strikes: u8,
    security_deposit_multiplier: u256,
}

struct AutoScheduleConfig {
    round_duration_days: u64,
    start_date: u64,
    member_rotation: Span<ContractAddress>,
}

struct MemberProfile {
    join_date: u64,
    total_contributions: u256,
    missed_contributions: u8,
    credit_score: u8,
    last_recipient_round: u256,
}

enum RoundStatus {
    Scheduled,
    Active,
    Completed,
    Cancelled,
}

✅ Success Criteria

Security

• All emergency scenarios tested and handled
• Penalty system reduces missed contributions by >80%
• No funds can be permanently locked

Automation

• Zero manual intervention needed for normal operations
• Rounds progress automatically without admin input
• System handles member changes gracefully

User Experience

• Clear member dashboards and contribution tracking
• Comprehensive event logging for transparency
• Mobile-friendly interaction patterns

Testing Requirements

• Unit tests for all new functions
• Integration tests for emergency scenarios
• Testnet deployment with full feature testing
• Gas optimization analysis
• Security audit of emergency functions

[wheval]

Hello @Pvsaint, i would love to work on this!

Recommended by OnlyDust for exceptional experience, quality, and reliability.

[Pvsaint]

Hello @Pvsaint, i would love to work on this!

Recommended by OnlyDust for exceptional experience, quality, and reliability.

Assigned

[wheval]

Thank you. On it!

[gelluisaac]

hi i would love to work on this issue, can i be assigned

Recommended by OnlyDust for high-quality and dependable contributions.