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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 | """
ERC20 Token Transfer Validator
Validates that an ERC20 token transfer transaction is correctly executed
"""
from typing import Dict, Any
class ERC20TransferValidator:
"""Validator for ERC20 token transfers"""
def __init__(self, token_address: str, to_address: str, amount: float, token_decimals: int = 18):
"""
Initialize validator
Args:
token_address: ERC20 token contract address
to_address: Expected recipient address
amount: Expected transfer amount in tokens (float)
token_decimals: Token decimals (default: 18)
"""
from decimal import Decimal
self.expected_token = token_address.lower()
self.expected_to = to_address.lower()
# Convert token amount to smallest unit
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: 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': 'Contract Address',
'passed': True,
'points': 20,
'message': f'Correct token contract: {self.expected_token}'
})
else:
checks.append({
'name': 'Contract Address',
'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 (20 points)
# ERC20 transfer function selector: 0xa9059cbb (first 4 bytes of keccak256("transfer(address,uint256)"))
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 = '0xa9059cbb' # transfer(address,uint256)
if function_selector == expected_selector:
score += 20
checks.append({
'name': 'Function Signature',
'passed': True,
'points': 20,
'message': 'Correct ERC20 transfer function signature'
})
# Decode parameters from data
try:
# Data format: 0x + function_selector (8 chars) + address (64 chars) + amount (64 chars)
if len(tx_data) >= 138: # 0x(2) + selector(8) + address(64) + amount(64) = 138
recipient_hex = tx_data[10:74] # Skip 0x and selector
amount_hex = tx_data[74:138]
# Convert to addresses and amounts
recipient_address = '0x' + recipient_hex[-40:] # Last 40 chars (20 bytes)
amount_value = int(amount_hex, 16)
details['decoded_recipient'] = recipient_address.lower()
details['decoded_amount'] = amount_value
except Exception as e:
details['decode_error'] = str(e)
else:
checks.append({
'name': 'Function Signature',
'passed': False,
'points': 0,
'message': f'Expected: {expected_selector}, Got: {function_selector}'
})
else:
checks.append({
'name': 'Function Signature',
'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 changes (30 points)
sender_balance_before = state_before.get('token_balance', 0)
sender_balance_after = state_after.get('token_balance', 0)
receiver_balance_before = state_before.get('target_token_balance', 0)
receiver_balance_after = state_after.get('target_token_balance', 0)
sender_change = sender_balance_after - sender_balance_before
receiver_change = receiver_balance_after - receiver_balance_before
# Check if changes match expected
sender_correct = sender_change == -self.expected_amount
receiver_correct = receiver_change == self.expected_amount
if sender_correct and receiver_correct:
score += 30
checks.append({
'name': 'Token Balance Changes',
'passed': True,
'points': 30,
'message': f'Correct token balance changes: -{self.expected_amount} (sender), +{self.expected_amount} (receiver)'
})
else:
# Balance changes incorrect - no partial credit for consistency
error_parts = []
if not sender_correct:
error_parts.append(f'Sender: expected -{self.expected_amount}, got {sender_change}')
if not receiver_correct:
error_parts.append(f'Receiver: expected +{self.expected_amount}, got {receiver_change}')
checks.append({
'name': 'Token Balance Changes',
'passed': False,
'points': 0,
'message': ' | '.join(error_parts) if error_parts else 'Balance changes incorrect'
})
details['sender_balance_before'] = sender_balance_before
details['sender_balance_after'] = sender_balance_after
details['sender_change'] = sender_change
details['receiver_balance_before'] = receiver_balance_before
details['receiver_balance_after'] = receiver_balance_after
details['receiver_change'] = receiver_change
details['expected_amount'] = 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
}
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