feat: Implement comprehensive MarketParameterValidator for robust market creation

[Jagadeeshftw]

This MR implements comprehensive validation for market creation parameters as outlined in issue #70, providing robust protection against invalid market configurations and ensuring data integrity throughout the market creation process.

✨ Key Features Implemented

1. MarketParameterValidator Struct

• Location: contracts/predictify-hybrid/src/validation.rs
• Purpose: Centralized validation logic for all market creation parameters
• Features: Comprehensive parameter validation with detailed error reporting

2. Core Validation Functions

• ✅ validate_duration_limits() - Duration bounds validation (1-365 days)
• ✅ validate_stake_amounts() - Stake amount validation with min/max limits
• ✅ validate_outcome_count() - Outcome count validation (2-10 outcomes)
• ✅ validate_threshold_value() - Threshold value bounds validation
• ✅ validate_comparison_operator() - Supported operator validation
• ✅ validate_market_parameters_all_together() - Comprehensive parameter validation

3. Validation Rules System

• Function: get_parameter_validation_rules()
• Purpose: Provides clear validation rules and limits
• Output: Structured Map with validation guidelines

4. Enhanced Market Creation

• File: contracts/predictify-hybrid/src/markets.rs
• Integration: Updated validate_market_params() to use new validator
• Benefits: More robust validation with detailed error messages

🔧 Technical Implementation

Validation Categories

1. Duration Validation

   • Minimum: 1 day
   • Maximum: 365 days
   • Business rule compliance

2. Stake Amount Validation

   • Minimum: config::MIN_VOTE_STAKE
   • Maximum: config::LARGE_MARKET_THRESHOLD
   • Protection against invalid stake amounts

3. Outcome Validation

   • Minimum: 2 outcomes
   • Maximum: 10 outcomes
   • Duplicate detection (exact match)
   • Empty outcome validation

4. Threshold Validation

   • Configurable min/max bounds
   • Numeric range validation
   • Protection against invalid thresholds

5. Comparison Operator Validation

   • Supported operators: gt, gte, lt, lte, eq
   • Clear error messages for unsupported operators

�� Testing Coverage

Comprehensive Test Suite

• File: contracts/predictify-hybrid/src/validation_tests.rs
• Coverage: All validation functions with edge cases
• Test Categories:
  • ✅ Valid parameter combinations
  • ✅ Invalid duration limits
  • ✅ Invalid stake amounts
  • ✅ Invalid outcome counts
  • ✅ Invalid threshold values
  • ✅ Invalid comparison operators
  • ✅ Duplicate outcome detection
  • ✅ Validation rules generation

Test Results

running 15 tests
test market_parameter_validator_tests::test_validate_comparison_operator ... ok
test market_parameter_validator_tests::test_validate_duration_limits ... ok
test market_parameter_validator_tests::test_validate_market_parameters_all_together ... ok
test market_parameter_validator_tests::test_validate_outcome_count ... ok
test market_parameter_validator_tests::test_validate_stake_amounts ... ok
test market_parameter_validator_tests::test_validate_threshold_value ... ok
test market_parameter_validator_tests::test_get_parameter_validation_rules ... ok
# ... all tests passing

�� Benefits

Security & Reliability

• Protection: Prevents invalid market configurations
• Data Integrity: Ensures consistent parameter validation
• Error Prevention: Catches issues early in market creation

Developer Experience

• Clear Error Messages: Detailed validation feedback
• Structured Validation: Organized validation logic
• Maintainable Code: Centralized validation rules

User Experience

• Robust Markets: Higher quality market creation
• Clear Feedback: Better error messages for users
• Consistent Behavior: Predictable validation across all markets

📋 Files Changed

1. contracts/predictify-hybrid/src/validation.rs

   • Added MarketParameterValidator struct
   • Implemented all validation functions
   • Added validation rules system

2. contracts/predictify-hybrid/src/validation_tests.rs

   • Added comprehensive test suite
   • Edge case coverage
   • Integration tests

3. contracts/predictify-hybrid/src/markets.rs

   • Updated validate_market_params() function
   • Integrated new validation system
   • Added config import

✅ Quality Assurance

• Build Status: ✅ All builds passing
• Test Coverage: ✅ 100% test pass rate
• Code Quality: ✅ No linter errors
• Integration: ✅ Seamless integration with existing codebase

🔗 Related Issues

• Closes: Implement Detailed Validation for Market Creation Parameters #70 - Implement Detailed Validation for Market Creation Parameters
• Priority: High
• Labels: validation, market, parameters

📝 Migration Notes

• Backward Compatible: ✅ No breaking changes
• Performance: ✅ Minimal performance impact
• Deployment: ✅ Safe for immediate deployment

---

Closes #70

Ready for Review 🚀

[Jagadeeshftw]

@greatest0fallt1me Can you please review it?

[greatest0fallt1me]

Looks good to me! @Jagadeeshftw