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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 | """
BNB Transfer Max Amount Validator
Validates that maximum BNB amount (balance - gas) was transferred
"""
from typing import Dict, Any
class BNBTransferMaxAmountValidator:
"""Validator for BNB maximum amount transfer"""
def __init__(self, to_address: str):
"""
Initialize validator
Args:
to_address: Expected recipient address
"""
self.expected_recipient = to_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 transaction execution results
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
"""
score = 0
details = {}
checks = []
# Check 1: Transaction success (30 points)
tx_success = receipt.get('status') == 1
if tx_success:
score += 30
checks.append({
'name': 'Transaction Success',
'passed': True,
'points': 30,
'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: Recipient address correct (20 points)
actual_to = tx.get('to', '').lower()
recipient_correct = actual_to == self.expected_recipient
if recipient_correct:
score += 20
checks.append({
'name': 'Recipient Address',
'passed': True,
'points': 20,
'message': f'Correct recipient: {self.expected_recipient}'
})
else:
checks.append({
'name': 'Recipient Address',
'passed': False,
'points': 0,
'message': f'Expected: {self.expected_recipient}, Got: {actual_to}'
})
details['expected_recipient'] = self.expected_recipient
details['actual_to'] = actual_to
# Check 3: Maximum amount transferred (30 points)
# Max amount = balance_before - gas_cost
balance_before = state_before.get('balance', 0)
balance_after = state_after.get('balance', 0)
gas_used = receipt.get('gasUsed', 0)
gas_price = receipt.get('effectiveGasPrice', 0)
gas_cost = gas_used * gas_price
# The actual transferred amount
actual_transferred = tx.get('value', 0)
# Expected max transfer = balance - gas cost
expected_max_transfer = balance_before - gas_cost
# Allow small tolerance (0.1% or 1000 wei, whichever is larger)
tolerance = max(int(expected_max_transfer * 0.001), 1000)
transfer_correct = abs(actual_transferred - expected_max_transfer) <= tolerance
if transfer_correct:
score += 30
checks.append({
'name': 'Maximum Amount Transferred',
'passed': True,
'points': 30,
'message': f'Transferred max amount: {actual_transferred / 10**18:.6f} BNB (balance: {balance_before / 10**18:.6f} BNB, gas: {gas_cost / 10**18:.6f} BNB)'
})
else:
checks.append({
'name': 'Maximum Amount Transferred',
'passed': False,
'points': 0,
'message': f'Expected: {expected_max_transfer / 10**18:.6f} BNB, Transferred: {actual_transferred / 10**18:.6f} BNB'
})
details['balance_before'] = balance_before
details['gas_cost'] = gas_cost
details['expected_max_transfer'] = expected_max_transfer
details['actual_transferred'] = actual_transferred
# Check 4: Sender balance minimal (20 points)
# After transferring max amount, balance should be close to 0
# Only dust should remain (less than 0.0001 BNB = 100000000000000 wei)
max_remaining = 100000000000000 # 0.0001 BNB
balance_minimal = balance_after <= max_remaining
if balance_minimal:
score += 20
checks.append({
'name': 'Sender Balance Minimal',
'passed': True,
'points': 20,
'message': f'Sender balance minimal: {balance_after / 10**18:.10f} BNB (< 0.0001 BNB)'
})
else:
checks.append({
'name': 'Sender Balance Minimal',
'passed': False,
'points': 0,
'message': f'Sender balance too high: {balance_after / 10**18:.6f} BNB (should be < 0.0001 BNB)'
})
details['balance_after'] = balance_after
details['max_remaining_allowed'] = max_remaining
# Final result
passed = score >= self.max_score * 0.8 # 80% threshold
return {
'score': score,
'max_score': self.max_score,
'passed': passed,
'checks': checks,
'details': details
}
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