benchmark/validators/contract_call_simple_validator.py

"""
Simple Contract Call Validator

Validates that a simple contract function call (increment) is correctly executed
"""

from typing import Dict, Any


class ContractCallSimpleValidator:
    """Validator for simple contract function calls"""
    
    def __init__(self, contract_address: str):
        """
        Initialize validator
        
        Args:
            contract_address: SimpleCounter contract address
        """
        self.expected_contract = contract_address.lower()
        self.max_score = 100
    
    def validate(
        self,
        tx: Dict[str, Any],
        receipt: Dict[str, Any],
        state_before: Dict[str, Any],
        state_after: Dict[str, Any]
    ) -> Dict[str, Any]:
        """
        Validate the contract call transaction
        
        Args:
            tx: Transaction object
            receipt: Transaction receipt
            state_before: Blockchain state before transaction
            state_after: Blockchain state after transaction
            
        Returns:
            Validation results including score and details
        """
        checks = []
        score = 0
        details = {}
        
        # Check 1: Transaction success (40 points)
        tx_success = receipt.get('status') == 1
        
        if tx_success:
            score += 40
            checks.append({
                'name': 'Transaction Success',
                'passed': True,
                'points': 40,
                'message': 'Transaction executed successfully'
            })
        else:
            checks.append({
                'name': 'Transaction Success',
                'passed': False,
                'points': 0,
                'message': f"Transaction failed with status: {receipt.get('status')}"
            })
            return {
                'score': score,
                'max_score': self.max_score,
                'passed': False,
                'checks': checks,
                'details': details
            }
        
        # Check 2: Contract address correct (20 points)
        actual_to = tx.get('to', '').lower()
        contract_correct = actual_to == self.expected_contract
        
        if contract_correct:
            score += 20
            checks.append({
                'name': 'Contract Address',
                'passed': True,
                'points': 20,
                'message': f'Correct contract: {self.expected_contract}'
            })
        else:
            checks.append({
                'name': 'Contract Address',
                'passed': False,
                'points': 0,
                'message': f'Expected: {self.expected_contract}, Got: {actual_to}'
            })
        
        details['expected_contract'] = self.expected_contract
        details['actual_to'] = actual_to
        
        # Check 3: Function signature (20 points)
        # increment() function selector: 0xd09de08a
        tx_data = tx.get('data', '0x')
        
        if tx_data and len(tx_data) >= 10:  # 0x + 8 hex chars (4 bytes)
            function_selector = tx_data[:10].lower()
            expected_selector = '0xd09de08a'  # increment()
            
            if function_selector == expected_selector:
                score += 20
                checks.append({
                    'name': 'Function Signature',
                    'passed': True,
                    'points': 20,
                    'message': 'Correct increment() function signature'
                })
            else:
                checks.append({
                    'name': 'Function Signature',
                    'passed': False,
                    'points': 0,
                    'message': f'Expected: {expected_selector}, Got: {function_selector}'
                })
            
            details['function_selector'] = function_selector
        else:
            checks.append({
                'name': 'Function Signature',
                'passed': False,
                'points': 0,
                'message': 'No data field or too short'
            })
            details['function_selector'] = 'N/A'
        
        # Check 4: Counter incremented (20 points)
        counter_before = state_before.get('counter_value', 0)
        counter_after = state_after.get('counter_value', 0)
        
        expected_increase = 1
        actual_increase = counter_after - counter_before
        
        if actual_increase == expected_increase:
            score += 20
            checks.append({
                'name': 'Counter Incremented',
                'passed': True,
                'points': 20,
                'message': f'Counter increased by {expected_increase}: {counter_before} -> {counter_after}'
            })
        else:
            checks.append({
                'name': 'Counter Incremented',
                'passed': False,
                'points': 0,
                'message': f'Expected increase: {expected_increase}, Actual: {actual_increase} (Before: {counter_before}, After: {counter_after})'
            })
        
        details['counter_before'] = counter_before
        details['counter_after'] = counter_after
        details['counter_increase'] = actual_increase
        
        # Determine if all checks passed
        all_passed = all(check['passed'] for check in checks)
        
        return {
            'score': score,
            'max_score': self.max_score,
            'passed': all_passed,
            'checks': checks,
            'details': details
        }