feat: Centralize Event System with Comprehensive Event Management

[1nonlypiece]

Overview

This PR introduces a dedicated events.rs module that centralizes all event emission, logging, and management functionality for the Predictify Hybrid contract. The event system provides structured event handling, comprehensive logging capabilities, and robust validation mechanisms.

🎯 Key Features

Event Types & Structures

• Market Events: MarketCreated, VoteCast, OracleResult, MarketResolved
• System Events: DisputeCreated, FeeCollected, ErrorLogged, PerformanceMetric
• Structured Event Data: Type-safe event structures with proper Soroban SDK integration
• Event Summaries: Standardized event summaries for consistent reporting

Event Emission System

• EventEmitter: Centralized event emission with storage persistence
• Event Validation: Built-in validation for event structure and data integrity
• Symbol Management: Shortened event symbols (≤9 chars) for Soroban compatibility
• Generic Event Storage: Type-safe event storage with proper trait bounds

Event Logging & Monitoring

• EventLogger: Comprehensive logging system with market-specific event tracking
• Recent Events: Retrieval of recent events with configurable limits
• Error Events: Dedicated error event tracking and management
• Performance Metrics: Event performance monitoring and analytics

Event Validation & Helpers

• EventValidator: Validation utilities for event structure and content
• EventHelpers: Utility functions for timestamp validation, event age calculation
• Context Creation: Event context building for enhanced debugging
• Timestamp Formatting: Human-readable timestamp formatting utilities

Event Documentation & Testing

• Event Documentation: Comprehensive documentation for all event types
• Usage Examples: Practical examples for event system usage
• Testing Utilities: Test event creation and validation helpers
• Event Analytics: Event system overview and performance metrics

🔧 Technical Implementation

Soroban SDK Integration

• Type Safety: Proper use of soroban_sdk::String and soroban_sdk::Vec
• Trait Bounds: Correct implementation of IntoVal and TryFromVal traits
• Storage Compatibility: Soroban-compatible event storage and retrieval
• Symbol Constraints: Adherence to Soroban symbol length limitations

Event System Architecture

// Event emission with validation
EventEmitter::emit_market_created(env, market_id, admin, question, outcomes);

// Event logging with filtering
EventLogger::get_market_events(env, market_id);

// Event validation
EventValidator::validate_event_structure(event_type, event_data);

Contract Integration

• Contract Interface: Added event-related methods to main contract
• Event Methods: get_market_events, get_recent_events, validate_event_structure
• Testing Integration: Comprehensive test coverage for all event functionality
• Error Handling: Proper error handling and validation throughout

📊 Event System Benefits

Centralized Management

• Single Source of Truth: All event logic centralized in events.rs
• Consistent Patterns: Standardized event emission and logging patterns
• Maintainability: Easier maintenance and updates to event system
• Code Reuse: Reusable event utilities across the contract

Enhanced Monitoring

• Real-time Tracking: Live event monitoring and analytics
• Debugging Support: Enhanced debugging capabilities with event context
• Performance Insights: Event performance metrics and optimization
• Error Tracking: Comprehensive error event logging and analysis

Developer Experience

• Clear Documentation: Well-documented event types and usage patterns
• Testing Support: Comprehensive testing utilities and examples
• Type Safety: Compile-time guarantees for event structure and data
• IDE Support: Better IDE support with structured event types

🧪 Testing

Comprehensive Test Coverage

• Event Emission Tests: Validation of all event emission scenarios
• Event Logging Tests: Testing of event retrieval and filtering
• Event Validation Tests: Verification of event structure validation
• Integration Tests: End-to-end event system integration testing

Test Categories

• test_event_emitter_market_created: Market creation event emission
• test_event_emitter_vote_cast: Vote casting event emission
• test_event_logger_get_recent_events: Recent event retrieval
• test_event_validator_market_created_event: Event validation
• test_event_integration: Full event system integration

🔄 Migration Guide

For Existing Code

• Event Emission: Use EventEmitter methods instead of direct event creation
• Event Logging: Use EventLogger methods for event retrieval
• Event Validation: Use EventValidator for event structure validation
• Event Helpers: Use EventHelpers for common event operations

Breaking Changes

• None: This is a purely additive change with no breaking modifications
• Backward Compatible: All existing functionality remains unchanged
• Optional Usage: Event system can be used incrementally

�� Performance Impact

Minimal Overhead

• Efficient Storage: Optimized event storage with minimal overhead
• Lazy Loading: Events loaded only when requested
• Memory Management: Proper memory management for event data
• Scalable Design: Event system scales with contract usage

Optimization Features

• Event Filtering: Efficient event filtering and retrieval
• Context Caching: Cached event context for improved performance
• Batch Operations: Support for batch event operations
• Memory Efficiency: Memory-efficient event data structures

🔮 Future Enhancements

Planned Features

• Event Compression: Event data compression for storage efficiency
• Event Streaming: Real-time event streaming capabilities
• Advanced Analytics: Enhanced event analytics and reporting
• Event Plugins: Plugin system for custom event handlers

Extensibility

• Custom Events: Support for custom event types and structures
• Event Hooks: Event hook system for custom processing
• External Integration: Integration with external event systems
• Advanced Filtering: Advanced event filtering and search capabilities

�� Documentation

Event System Overview

The event system provides a comprehensive framework for event management in the Predictify Hybrid contract, enabling structured event emission, logging, and monitoring.

Usage Examples

// Emit a market creation event
EventEmitter::emit_market_created(env, market_id, admin, question, outcomes);

// Get market events
let events = EventLogger::get_market_events(env, market_id);

// Validate event structure
let is_valid = EventValidator::validate_event_structure(event_type, event_data);

API Reference

• EventEmitter: Event emission and storage management
• EventLogger: Event logging and retrieval functionality
• EventValidator: Event validation and structure verification
• EventHelpers: Utility functions for event operations

✅ Quality Assurance

Code Quality

• Type Safety: Full type safety with Soroban SDK integration
• Error Handling: Comprehensive error handling throughout
• Documentation: Extensive inline documentation and examples
• Testing: Complete test coverage for all functionality

Soroban Compatibility

• SDK Compliance: Full compliance with Soroban SDK requirements
• Storage Compatibility: Proper use of Soroban storage mechanisms
• Type Constraints: Adherence to Soroban type system constraints
• Performance: Optimized for Soroban runtime performance

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Related Issues: #113
Breaking Changes: None
Migration Required: No
Testing: ✅ All tests passing
Documentation: ✅ Complete

[greatest0fallt1me]

@1nonlypiece Thanks for the PR