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execution-grounded-evaluation
blockchain
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edbc049 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 | """Validator for erc20_approve operation"""
from typing import Dict, Any
class ERC20ApproveValidator:
"""Validator for erc20_approve operation"""
def __init__(self, token_address: str, spender_address: str,
amount: float, agent_address: str, token_decimals: int = 18):
self.token_address = token_address.lower()
self.spender_address = spender_address.lower()
self.amount = amount
self.agent_address = agent_address.lower()
self.token_decimals = token_decimals
self.amount_wei = int(self.amount * 10**self.token_decimals)
def validate(self, tx: Dict[str, Any], receipt: Dict[str, Any],
state_before: Dict[str, Any], state_after: Dict[str, Any]) -> Dict[str, Any]:
checks = []
total_score = 0
max_score = 100
# 1. Transaction Success (30 points)
tx_success = receipt.get('status') == 1
tx_success_score = 30 if tx_success else 0
total_score += tx_success_score
checks.append({
'name': 'Transaction Success',
'passed': tx_success,
'score': tx_success_score,
'max_score': 30,
'message': 'Transaction executed successfully' if tx_success else 'Transaction failed'
})
if not tx_success:
# If transaction failed, skip other checks
return {
'passed': False,
'score': total_score,
'max_score': max_score,
'checks': checks,
'details': {
'transaction_failed': True
}
}
# 2. Correct Function Called (20 points)
tx_data = tx.get('data', '') if isinstance(tx, dict) else tx.data if hasattr(tx, 'data') else ''
correct_function = False
if isinstance(tx_data, str) and tx_data.startswith('0x095ea7b3'):
correct_function = True
elif hasattr(tx_data, 'hex') and tx_data.hex().startswith('095ea7b3'):
correct_function = True
function_score = 20 if correct_function else 0
total_score += function_score
checks.append({
'name': 'Correct Function Called',
'passed': correct_function,
'score': function_score,
'max_score': 20,
'message': 'Called approve(address,uint256)' if correct_function else f'Wrong function called. Expected approve (0x095ea7b3), got {tx_data[:10] if tx_data else "none"}'
})
# Decode actual parameters from transaction data
actual_amount_wei = self.amount_wei # Default to generated parameter
actual_spender = None
params_match = True
param_mismatch_details = []
if correct_function and len(tx_data) >= 138:
try:
# approve(address spender, uint256 amount)
# Data layout: 0x + 8 (selector) + 64 (spender) + 64 (amount)
spender_hex = tx_data[10:74] # Skip '0x095ea7b3', take next 64 chars
actual_spender = '0x' + spender_hex[-40:] # Last 40 chars = 20 bytes = address
amount_hex = tx_data[74:138] # Next 64 chars
actual_amount_wei = int(amount_hex, 16)
print(f"🔍 Decoded transaction parameters:")
print(f" Spender: {actual_spender}")
print(f" Amount: {actual_amount_wei / 10**self.token_decimals:.2f}")
# Compare with generated parameters
if actual_spender.lower() != self.spender_address.lower():
params_match = False
param_mismatch_details.append(f"spender mismatch: expected {self.spender_address}, got {actual_spender}")
# No tolerance for amount (exact match required)
if abs(actual_amount_wei - self.amount_wei) > 0:
params_match = False
param_mismatch_details.append(f"amount mismatch: expected {self.amount:.2f}, got {actual_amount_wei / 10**self.token_decimals:.2f}")
if not params_match:
print(f"⚠️ Parameter mismatches detected:")
for detail in param_mismatch_details:
print(f" - {detail}")
else:
print(f"✅ All parameters match generated values")
except Exception as e:
print(f"⚠️ Failed to decode parameters from tx data: {e}, using generated parameters")
# Get state changes
allowance_before = state_before.get('allowance', 0)
allowance_after = state_after.get('allowance', 0)
allowance_change = allowance_after - allowance_before
# Use actual amount for validation
expected_amount = actual_amount_wei / 10**self.token_decimals
# 3. Allowance Set Correctly (40 points)
# approve() SETS the allowance to the specified amount (not increases it)
# So we check if allowance_after equals the approved amount (exact match)
allowance_valid = allowance_after == actual_amount_wei
allowance_score = 40 if allowance_valid else 0
total_score += allowance_score
allowance_message = f'Allowance set to {allowance_after / 10**self.token_decimals:.2f} (expected: {expected_amount:.2f})' if allowance_valid else f'Allowance mismatch. Expected: {expected_amount:.2f}, actual: {allowance_after / 10**self.token_decimals:.2f}'
if not params_match and param_mismatch_details:
allowance_message += f' [Note: Parameter mismatches: {", ".join(param_mismatch_details)}]'
checks.append({
'name': 'Allowance Set Correctly',
'passed': allowance_valid,
'score': allowance_score,
'max_score': 40,
'message': allowance_message
})
# 4. No Token Transfer (10 points)
# Token balance should not change for approve
balance_before = state_before.get('token_balance', 0)
balance_after = state_after.get('token_balance', 0)
no_transfer = balance_before == balance_after
no_transfer_score = 10 if no_transfer else 0
total_score += no_transfer_score
checks.append({
'name': 'No Token Transfer',
'passed': no_transfer,
'score': no_transfer_score,
'max_score': 10,
'message': 'Token balance unchanged (approve does not transfer)' if no_transfer else f'Token balance changed unexpectedly. Before: {balance_before / 10**self.token_decimals:.4f}, After: {balance_after / 10**self.token_decimals:.4f}'
})
all_passed = all(check['passed'] for check in checks)
return {
'passed': all_passed,
'score': total_score,
'max_score': max_score,
'checks': checks,
'details': {
'approved_amount': expected_amount,
'allowance_before': allowance_before / 10**self.token_decimals,
'allowance_after': allowance_after / 10**self.token_decimals,
'allowance_change': allowance_change / 10**self.token_decimals,
'token_balance_unchanged': no_transfer,
'function_called': tx_data[:10] if tx_data else 'none',
'parameters_match': params_match,
'parameter_mismatches': param_mismatch_details if param_mismatch_details else None,
'actual_spender': actual_spender,
'expected_spender': self.spender_address
}
}
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