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json
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English
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ArXiv:
Tags:
benchmark
code-generation
transaction-code-generation
execution-grounded-evaluation
blockchain
evm
License:
File size: 6,026 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 | """
ERC721 Approve Validator
Validate ERC721 NFT approve operation execution.
"""
from typing import Dict, Any
class ERC721ApproveValidator:
"""Validate ERC721 approval operation"""
def __init__(
self,
nft_address: str,
spender_address: str,
token_id: int
):
self.nft_address = nft_address.lower()
self.spender_address = spender_address.lower()
self.token_id = token_id
# approve(address,uint256) function selector
self.expected_selector = '0x095ea7b3'
# Total 100 points
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 ERC721 approval transaction
Checks:
1. Transaction executed successfully (30 points)
2. Approved address correctly set (50 points)
3. Used function: approve function (correct selector)(20 points)
"""
checks = []
total_score = 0
# 1. Validate transaction success (30 points)
tx_status = receipt.get('status', 0)
if tx_status == 1:
checks.append({
'name': 'Transaction Success',
'passed': True,
'message': 'Transaction executed successfully',
'score': 30
})
total_score += 30
else:
checks.append({
'name': 'Transaction Success',
'passed': False,
'message': f'Transaction failed with status: {tx_status}',
'score': 30
})
# If transaction failed, return directly
return {
'passed': False,
'score': 0,
'max_score': self.max_score,
'checks': checks,
'details': {
'nft_address': self.nft_address,
'token_id': self.token_id,
'spender_address': self.spender_address,
'transaction_status': tx_status
}
}
# 2. Validate approved address (40 points)
approved_before = state_before.get('nft_approved', '').lower() if state_before.get('nft_approved') else None
approved_after = state_after.get('nft_approved', '').lower() if state_after.get('nft_approved') else None
if approved_after and approved_after == self.spender_address:
checks.append({
'name': 'Approval Check',
'passed': True,
'message': f'NFT #{self.token_id} correctly approved for {self.spender_address}',
'score': 50,
'details': {
'approved_before': approved_before,
'approved_after': approved_after,
'expected': self.spender_address
}
})
total_score += 50
else:
checks.append({
'name': 'Approval Check',
'passed': False,
'message': f'Approval not set correctly. Expected: {self.spender_address}, Got: {approved_after}',
'score': 50,
'details': {
'approved_before': approved_before,
'approved_after': approved_after,
'expected': self.spender_address
}
})
# 3. Validate Used function: correct function selector (20 points)
tx_data = tx.get('data', '') or tx.get('input', '')
if isinstance(tx_data, bytes):
tx_data = tx_data.hex()
if isinstance(tx_data, str) and tx_data.startswith('0x'):
tx_data = tx_data[2:]
# Extract function selector (First 4 bytes = 8 hex chars)
if len(tx_data) >= 8:
actual_selector = '0x' + tx_data[:8]
if actual_selector.lower() == self.expected_selector.lower():
checks.append({
'name': 'Function Selector',
'passed': True,
'message': f'Correct approve selector: {actual_selector}',
'score': 20,
'details': {
'expected': self.expected_selector,
'actual': actual_selector
}
})
total_score += 20
else:
checks.append({
'name': 'Function Selector',
'passed': False,
'message': f'Incorrect function selector. Expected approve ({self.expected_selector}), got {actual_selector}',
'score': 20,
'details': {
'expected': self.expected_selector,
'actual': actual_selector
}
})
else:
checks.append({
'name': 'Function Selector',
'passed': False,
'message': 'Transaction data too short or missing',
'score': 20
})
# Aggregate results
all_passed = all(check['passed'] for check in checks)
return {
'passed': all_passed,
'score': total_score,
'max_score': self.max_score,
'checks': checks,
'details': {
'nft_address': self.nft_address,
'token_id': self.token_id,
'spender_address': self.spender_address,
'approved_before': approved_before,
'approved_after': approved_after,
'expected_selector': self.expected_selector,
'actual_selector': actual_selector if len(tx_data) >= 8 else 'N/A'
}
}
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