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benchmark
code-generation
transaction-code-generation
execution-grounded-evaluation
blockchain
evm
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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 | """
BNB Transfer Validator
Validate correctness of BNB native token transfer transaction
"""
from typing import Dict, Any, List
class BNBTransferValidator:
"""BNB Transfer Validator"""
def __init__(self, to_address: str, amount: float):
"""
Initialize validator
Args:
to_address: Expected recipient address
amount: Expected transfer amount in BNB (float)
"""
from decimal import Decimal
self.expected_to = to_address.lower()
# Use Decimal for precise BNB to wei conversion
self.expected_amount = int(Decimal(str(amount)) * Decimal(10**18))
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 transaction
Args:
tx: Transaction object
receipt: Transaction receipt
state_before: State before transaction
state_after: State after transaction
Returns:
Validation result dictionary
"""
checks = []
score = 0
# Check 1: Transaction success (30 points)
tx_success = receipt.get('status') == 1
checks.append({
'name': 'Transaction Success',
'passed': tx_success,
'message': 'Transaction executed successfully' if tx_success else 'Transaction failed',
'score': 30 if tx_success else 0
})
if tx_success:
score += 30
# Check 2: Target address correct (25 points)
actual_to = tx.get('to', '').lower() if tx.get('to') else ''
to_correct = actual_to == self.expected_to
checks.append({
'name': 'Target Address Correct',
'passed': to_correct,
'message': f"Expected: {self.expected_to}, Actual: {actual_to}",
'score': 25 if to_correct else 0
})
if to_correct:
score += 25
# Check 3: Transfer amount correct (25 points)
actual_value = int(tx.get('value', 0))
# Allow small margin of error (considering potential precision issues)
tolerance = int(self.expected_amount * 0.001) # 0.1% tolerance
amount_correct = abs(actual_value - self.expected_amount) <= tolerance
checks.append({
'name': 'Transfer Amount Correct',
'passed': amount_correct,
'message': f"Expected: {self.expected_amount} wei ({self.expected_amount / 10**18} BNB), "
f"Actual: {actual_value} wei ({actual_value / 10**18} BNB)",
'score': 25 if amount_correct else 0
})
if amount_correct:
score += 25
# Check 4: Gas settings reasonable (10 points)
gas_used = receipt.get('gasUsed', 0)
# Support both 'gas' (web3.py style) and 'gasLimit' (ethers.js style)
gas_limit = tx.get('gas', 0) or tx.get('gasLimit', 0)
# Basic transfer gas should be around 21000
# gas limit should be sufficient and not excessively high
# Note: system_config suggests gasLimit: 100000n as default, so we use 500000 as upper bound
gas_reasonable = (
gas_used >= 21000 and
gas_limit >= gas_used and
gas_limit <= 500000
)
checks.append({
'name': 'Gas Settings Reasonable',
'passed': gas_reasonable,
'message': f"Gas Used: {gas_used}, Gas Limit: {gas_limit}",
'score': 10 if gas_reasonable else 0
})
if gas_reasonable:
score += 10
# Check 5: Balance change correct (10 points)
balance_before = state_before.get('balance', 0)
balance_after = state_after.get('balance', 0)
balance_change = balance_before - balance_after
# Balance change should equal transfer amount + gas fee
gas_cost = gas_used * receipt.get('effectiveGasPrice', 0)
expected_balance_change = actual_value + gas_cost
# Allow small margin of error
balance_tolerance = int(expected_balance_change * 0.001) # 0.1% tolerance
balance_correct = abs(balance_change - expected_balance_change) <= balance_tolerance
checks.append({
'name': 'Balance Change Correct',
'passed': balance_correct,
'message': f"Balance decrease: {balance_change} wei (Transfer {actual_value} + Gas {gas_cost})",
'score': 10 if balance_correct else 0
})
if balance_correct:
score += 10
# Determine if Passed
passed = all(check['passed'] for check in checks)
# Generate Feedback
feedback = self._generate_feedback(checks, score, passed)
return {
'passed': passed,
'score': score,
'max_score': self.max_score,
'checks': checks,
'feedback': feedback,
'details': {
'expected_to': self.expected_to,
'expected_amount': self.expected_amount,
'actual_to': actual_to,
'actual_amount': actual_value,
'gas_used': gas_used,
'balance_change': balance_change
}
}
def _generate_feedback(
self,
checks: List[Dict[str, Any]],
score: int,
passed: bool
) -> str:
"""
Generate feedback message
Args:
checks: List of check items
score: Total score
passed: Whether validation passed
Returns:
Feedback string
"""
lines = []
if passed:
lines.append("🎉 Congratulations! All validation checks passed!")
lines.append(f"Final Score: {score}/{self.max_score}")
else:
lines.append("❌ Validation failed, please check the following issues:")
failed_checks = [c for c in checks if not c['passed']]
for check in failed_checks:
lines.append(f" - {check['name']}: {check['message']}")
lines.append(f"\nCurrent Score: {score}/{self.max_score}")
return '\n'.join(lines)
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