-
Notifications
You must be signed in to change notification settings - Fork 1
/
context.py
96 lines (79 loc) · 3.02 KB
/
context.py
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
import dataclasses
import re
from urllib.parse import urlparse
from security_engine.models.transaction import Tx
from security_engine.models.typed_data import TypedData
from security_engine.models.action import BaseAction, SignType
from security_engine.models.chain import Chain
@dataclasses.dataclass()
class BaseContext(object):
action: BaseAction
origin: str = dataclasses.field(init=False)
sign_type: SignType = dataclasses.field(init=False)
chain: Chain = dataclasses.field(init=False)
domain: str = dataclasses.field(init=False)
def __post_init__(self):
self.origin = self.get_origin(self.action.origin)
self.domain = self.get_domain(self.origin)
def get_origin(self, origin):
if not origin:
return ''
return origin.rstrip('/')
def get_domain(self, origin):
if not origin:
return ''
return urlparse(origin).netloc
@dataclasses.dataclass()
class TextContext(BaseContext):
text: str = dataclasses.field(init=False)
def __post_init__(self):
super(TextContext, self).__post_init__()
self.text = self.action.text
self.sign_type = SignType.text
def match_sign_text(self, text, text_sign_pattern):
p = re.compile(text_sign_pattern)
m = p.match(text)
return True if m else False
@dataclasses.dataclass()
class TypedDataContext(BaseContext):
typed_data: TypedData = dataclasses.field(init=False)
def __post_init__(self):
super(TypedDataContext, self).__post_init__()
self.typed_data = self.get_typed_data(self.action)
self.sign_type = SignType.typed_data
def get_typed_data(self, action):
data = action.typed_data
if not data:
return
return TypedData(**dict(
chain_id=int(data['domain']['chainId']),
version=data['domain']['version'],
name=data['domain']['name'],
verifying_contract=data['domain']['verifyingContract'],
primary_type=data['primaryType'],
types=data['types'],
message=data['message']
))
@dataclasses.dataclass()
class TransactionContext(BaseContext):
tx: Tx = dataclasses.field(init=False)
def __post_init__(self):
super(TransactionContext, self).__post_init__()
self.tx = self.get_tx(self.action)
self.sign_type = SignType.transaction
def get_tx(self, action):
tx = action.transaction
if not tx:
return
return Tx(**dict(
chain_id=tx['chainId'],
data=tx.get('data', '0x'),
from_=tx.get('from', '').lower(),
to=tx.get('to', '').lower(),
gas=int(tx.get('gas', '0x0'), 16),
gas_price=int(tx.get('gasPrice', '0x0'), 16),
max_fee_per_gas=int(tx.get('maxFeePerGas', '0x0'), 16),
max_priority_fee_per_gas=int(tx.get('maxPriorityFeePerGas', '0x0'), 16),
nonce=int(tx.get('nonce', '0x0'), 16),
value=int(tx.get('value', '0x0'), 16)
))