Datasets:
Tasks:
Text Generation
Modalities:
Text
Formats:
json
Languages:
English
Size:
< 1K
ArXiv:
Tags:
benchmark
code-generation
transaction-code-generation
execution-grounded-evaluation
blockchain
evm
License:
File size: 7,921 Bytes
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 | """
ERC20 Burn Validator
Validates that ERC20 tokens were successfully burned (destroyed) by transferring to zero address
"""
from typing import Dict, Any
class ERC20BurnValidator:
"""Validator for ERC20 token burn transactions"""
def __init__(self, token_address: str, amount: float, token_decimals: int = 18):
"""
Initialize validator
Args:
token_address: ERC20 token contract address
amount: Expected burn amount (in tokens, not wei)
token_decimals: Token decimal places (default 18)
"""
from decimal import Decimal
self.expected_token = token_address.lower()
# Convert amount to smallest unit (wei equivalent for tokens)
self.expected_amount = int(Decimal(str(amount)) * Decimal(10**token_decimals))
self.token_decimals = token_decimals
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: Token contract address correct (20 points)
actual_to = tx.get('to', '').lower()
contract_correct = actual_to == self.expected_token
if contract_correct:
score += 20
checks.append({
'name': 'Token Contract',
'passed': True,
'points': 20,
'message': f'Correct token contract: {self.expected_token}'
})
else:
checks.append({
'name': 'Token Contract',
'passed': False,
'points': 0,
'message': f'Expected: {self.expected_token}, Got: {actual_to}'
})
details['expected_token'] = self.expected_token
details['actual_to'] = actual_to
# Check 3: Function signature and zero address (20 points)
# ERC20 transfer function selector: 0xa9059cbb (keccak256("transfer(address,uint256)"))
# Zero address for burn: 0x0000000000000000000000000000000000000000
tx_data = tx.get('data', '0x')
if tx_data and len(tx_data) >= 10:
function_selector = tx_data[:10].lower()
expected_selector = '0xa9059cbb' # transfer(address,uint256)
if function_selector == expected_selector:
# Check if recipient is zero address (burn address)
if len(tx_data) >= 74: # 0x(2) + selector(8) + address(64) = 74
to_address_hex = tx_data[10:74]
to_address = '0x' + to_address_hex[-40:].lower()
zero_address = '0x0000000000000000000000000000000000000000'
if to_address == zero_address:
score += 20
checks.append({
'name': 'Function Signature & Zero Address',
'passed': True,
'points': 20,
'message': 'Correct transfer to zero address (burn)'
})
else:
checks.append({
'name': 'Function Signature & Zero Address',
'passed': False,
'points': 0,
'message': f'Transfer to wrong address: {to_address}, expected zero address'
})
details['transfer_to'] = to_address
# Decode amount from data
try:
if len(tx_data) >= 138: # 0x(2) + selector(8) + address(64) + amount(64) = 138
amount_hex = tx_data[74:138]
amount_value = int(amount_hex, 16)
details['decoded_amount'] = amount_value
except Exception as e:
details['decode_error'] = str(e)
else:
checks.append({
'name': 'Function Signature & Zero Address',
'passed': False,
'points': 0,
'message': 'Transaction data too short to decode'
})
else:
checks.append({
'name': 'Function Signature & Zero Address',
'passed': False,
'points': 0,
'message': f'Expected transfer function: {expected_selector}, Got: {function_selector}'
})
else:
checks.append({
'name': 'Function Signature & Zero Address',
'passed': False,
'points': 0,
'message': 'No data field or too short'
})
details['function_selector'] = tx_data[:10] if tx_data else None
# Check 4: Token balance decreased (30 points)
balance_before = state_before.get('token_balance', 0)
balance_after = state_after.get('token_balance', 0)
balance_decrease = balance_before - balance_after
# Allow small tolerance for potential rounding
tolerance = int(self.expected_amount * 0.001) or 1
balance_correct = abs(balance_decrease - self.expected_amount) <= tolerance
if balance_correct:
score += 30
checks.append({
'name': 'Token Balance Decrease',
'passed': True,
'points': 30,
'message': f'Token balance decreased by {balance_decrease} ({balance_decrease / 10**self.token_decimals:.6f})'
})
else:
checks.append({
'name': 'Token Balance Decrease',
'passed': False,
'points': 0,
'message': f'Expected decrease: {self.expected_amount}, Got: {balance_decrease}'
})
details['balance_before'] = balance_before
details['balance_after'] = balance_after
details['balance_decrease'] = balance_decrease
details['expected_burn'] = self.expected_amount
# 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
}
|