class UnsignedChainId(HashableRLP):
fields = (
('directive', big_endian_int),
(
'stakeMsg',
List(
[ # list with the following members
Binary.fixed_length(
20, allow_empty=True), # validatorAddress
List([Text()] * 5,
True), # description is Text of 5 elements
List([big_endian_int],
True), # new rate is in a list
big_endian_int, # min self delegation
big_endian_int, # max total delegation
Binary.fixed_length(
48, allow_empty=True), # slot key to remove
Binary.fixed_length(
48, allow_empty=True), # slot key to add
],
True)), # strictly these number of elements
('nonce', big_endian_int),
('gasPrice', big_endian_int),
('gasLimit', big_endian_int),
('chainId', big_endian_int),
)
def verify_eth_getProof_inclusion(proof, root):
trie_root = Binary.fixed_length(32, allow_empty=True)
hash32 = Binary.fixed_length(32)
class _Account(rlp.Serializable):
fields = [('nonce', big_endian_int), ('balance', big_endian_int),
('storage', trie_root), ('code_hash', hash32)]
acc = _Account(proof.nonce, proof.balance, proof.storageHash,
proof.codeHash)
rlp_account = rlp.encode(acc)
trie_key = keccak(bytes.fromhex(proof.address[2:]))
assert rlp_account == HexaryTrie.get_from_proof(
root, trie_key, format_proof_nodes(
proof.accountProof)), "Failed to verify account proof {}".format(
proof.address)
for storage_proof in proof.storageProof:
trie_key = keccak(pad_bytes(b'\x00', 32, storage_proof.key))
root = proof.storageHash
if storage_proof.value == b'\x00':
rlp_value = b''
else:
rlp_value = rlp.encode(storage_proof.value)
assert rlp_value == HexaryTrie.get_from_proof(
root, trie_key, format_proof_nodes(storage_proof.proof)
), "Failed to verify storage proof {}".format(storage_proof.key)
return True
class UnsignedChainId(HashableRLP):
fields = (
('directive', big_endian_int),
(
'stakeMsg',
List(
[ # list with the following members
Binary.fixed_length(
20, allow_empty=True), # validatorAddress
List([Text()] * 5,
True), # description is Text of 5 elements
List(
[List([big_endian_int], True)] * 3, True
), # commission rate is made up of 3 integers in an array [ [int1], [int2], [int3] ]
big_endian_int, # min self delegation
big_endian_int, # max total delegation
CountableList(
Binary.fixed_length(48, allow_empty=True)
), # bls-public-keys array of unspecified length, each key of 48
big_endian_int, # amount
],
True)), # strictly these number of elements
('nonce', big_endian_int),
('gasPrice', big_endian_int),
('gasLimit', big_endian_int),
('chainId', big_endian_int),
)
def verify_eth_get_proof(self, proof, root):
values = []
trie_root = Binary.fixed_length(32, allow_empty=True)
hash32 = Binary.fixed_length(32)
class _Account(rlp.Serializable):
fields = [('nonce', big_endian_int), ('balance', big_endian_int),
('storage', trie_root), ('code_hash', hash32)]
acc = _Account(proof.nonce, proof.balance, proof.storageHash,
proof.codeHash)
rlp_account = rlp.encode(acc)
trie_key = keccak(bytes.fromhex(proof.address[2:]))
if rlp_account != HexaryTrie.get_from_proof(
root, trie_key, self.format_proof_nodes(proof.accountProof)):
return False
for storage_proof in proof.storageProof:
trie_key = keccak(pad_bytes(b'\x00', 32, storage_proof.key))
root = proof.storageHash
if storage_proof.value == b'\x00':
rlp_value = b''
else:
rlp_value = rlp.encode(storage_proof.value)
if rlp_value != HexaryTrie.get_from_proof(
root, trie_key, self.format_proof_nodes(
storage_proof.proof)):
return False
else:
values.append(
{storage_proof.key.hex(): storage_proof.value.hex()})
return True, values
class Eight(rlp.Serializable):
fields = [('f0', big_endian_int), ('f1', big_endian_int),
('f2', big_endian_int), ('f3', big_endian_int),
('f4', big_endian_int), ('f5', big_endian_int),
('f6', Binary.fixed_length(20)), ('f7', Binary.fixed_length(20))]
def __init__(self, *args):
args = normalize_args(args)
super().__init__(*args)
def serialize(cls, obj):
sedes_list = List([
big_endian_int,
List([
Binary.fixed_length(20),
Binary.fixed_length(20), big_endian_int
])
])
tx_elems = [obj.output_type, [obj.output_guard, obj.token, obj.amount]]
tx_sedes = rlp.sedes.List(sedes_list)
return tx_sedes.serialize(tx_elems)
class UnsignedChainId(HashableRLP):
fields = (
('directive', big_endian_int),
('stakeMsg',
List([
Binary.fixed_length(20, allow_empty=True),
Binary.fixed_length(20, allow_empty=True), big_endian_int
], True)),
('nonce', big_endian_int),
('gasPrice', big_endian_int),
('gasLimit', big_endian_int),
('chainId', big_endian_int),
)
class SignedTransaction(rlp.Serializable):
fields = [
('nonce', big_endian_int),
('gasprice', big_endian_int),
('startgas', big_endian_int),
('to', Binary.fixed_length(20, allow_empty=True)),
('value', big_endian_int),
('data', binary),
('v', big_endian_int),
('r', big_endian_int),
('s', big_endian_int),
]
def __init__(self, nonce: int, gasprice: int, startgas: int, to: bytes, value: int, data: str,
v: int, r: int, s: int):
super(SignedTransaction, self).__init__(nonce, gasprice, startgas, to, value, data, v, r, s)
def sender(self, value: str) -> None:
self._sender = value
def to_dict(self) -> dict:
d = {}
for name, _ in self.__class__._meta.fields:
d[name] = getattr(self, name)
return d
def test_binary_fixed_lenght_of_zero():
sedes = Binary.fixed_length(0)
assert sedes.serialize(b'') == b''
with pytest.raises(SerializationError):
sedes.serialize(b'a')
with pytest.raises(SerializationError):
sedes.serialize(b'arst')
class BlockHeader(rlp.Serializable):
fields = [('parent_hash', hash32), ('uncles_hash', hash32),
('coinbase', address), ('state_root', trie_root),
('transaction_root', trie_root), ('receipt_root', trie_root),
('bloom', uint256), ('difficulty', big_endian_int),
('block_number', big_endian_int),
('gas_limit', big_endian_int), ('gas_used', big_endian_int),
('timestamp', big_endian_int), ('extra_data', binary),
('mix_hash', binary), ('nonce', Binary(8, allow_empty=True))]
class UnsignedHarmonyTxData(HashableRLP):
fields = (
('nonce', big_endian_int),
('gasPrice', big_endian_int),
('gas', big_endian_int),
('shardID', big_endian_int),
('toShardID', big_endian_int),
('to', Binary.fixed_length(20, allow_empty=True)),
('value', big_endian_int),
('data', binary),
)
class Transaction(ExtendedRLP):
fields = (
('nonce', big_endian_int),
('gasPrice', big_endian_int),
('gas', big_endian_int),
('to', Binary.fixed_length(20, allow_empty=True)),
('value', big_endian_int),
('data', binary),
('v', big_endian_int),
('r', big_endian_int),
('s', big_endian_int),
)
class Transaction(rlp.Serializable):
fields = [
("nonce", big_endian_int),
("gas_price", big_endian_int),
("gas", big_endian_int),
("to", Binary.fixed_length(20, allow_empty=True)),
("value", big_endian_int),
("data", binary),
("v", big_endian_int),
("r", big_endian_int),
("s", big_endian_int),
]
def verify_eth_get_proof(proof, root):
trie_root = Binary.fixed_length(32, allow_empty=True)
hash32 = Binary.fixed_length(32)
class _Account(rlp.Serializable):
fields = [('nonce', big_endian_int), ('balance', big_endian_int),
('storage', trie_root), ('code_hash', hash32)]
acc = _Account(proof.nonce, proof.balance,
w3.toBytes(hexstr=w3.toHex(proof.storageHash)),
w3.toBytes(hexstr=w3.toHex(proof.codeHash)))
rlp_account = rlp.encode(acc)
trie_key = keccak(w3.toBytes(hexstr=proof.address))
trie_proof = format_proof_nodes(proof.accountProof)
leaf = HexaryTrie.get_from_proof(root, trie_key, trie_proof)
if acc == b'':
print("Verify that the account does not exist")
else:
assert rlp_account == leaf, "Failed to verify account proof {}".format(
proof.address)
print("Succeed to verify account proof {}".format(proof.address))
return True
class RPLTransaction(rlp.Serializable):
fields = [
("nonce", big_endian_int),
("gas_price", big_endian_int),
("gas", big_endian_int),
("to", Binary.fixed_length(20, allow_empty=True)),
("value", big_endian_int),
("data", binary),
("v", big_endian_int),
("r", big_endian_int),
("s", big_endian_int),
]
@staticmethod
def new_tx(*, nonce, gas_price, gas, to, value, data, v, r, s):
return RPLTransaction(nonce, gas_price, gas, to, value, data, v, r, s)
class BlockHeader(rlp.Serializable):
fields = [('parent_hash', hash32), ('uncles_hash', hash32),
('coinbase', address), ('state_root', trie_root),
('transaction_root', trie_root), ('receipt_root', trie_root),
('bloom', int256), ('difficulty', big_endian_int),
('block_number', big_endian_int), ('gas_limit', big_endian_int),
('gas_used', big_endian_int), ('timestamp', big_endian_int),
('extra_data', binary), ('mix_hash', binary),
('nonce', Binary(8, allow_empty=True))]
@property
def hash(self) -> Hash32:
return keccak(rlp.encode(self))
@property
def mining_hash(self) -> Hash32:
return keccak(rlp.encode(self[:-2], MiningHeader))
class BlockHeader(rlp.Serializable):
fields = [('parent_hash', hash32), ('uncles_hash', hash32),
('coinbase', address), ('state_root', trie_root),
('transaction_root', trie_root), ('receipts_root', trie_root),
('bloom', int256), ('difficulty', big_endian_int),
('block_number', big_endian_int), ('gas_limit', big_endian_int),
('gas_used', big_endian_int), ('timestamp', big_endian_int),
('extra_data', binary), ('mix_hash', binary),
('nonce', Binary(8, allow_empty=True))]
def __init__(self,
coinbase,
difficulty,
block_number,
gas_limit,
timestamp,
parent_hash=ZERO_HASH32,
uncles_hash=EMPTY_UNCLE_HASH,
state_root=BLANK_ROOT_HASH,
transaction_root=BLANK_ROOT_HASH,
receipts_root=BLANK_ROOT_HASH,
bloom=0,
gas_used=0,
extra_data=b'',
mix_hash=ZERO_HASH32,
nonce=GENESIS_NONCE):
super(BlockHeader, self).__init__(
parent_hash=parent_hash,
uncles_hash=uncles_hash,
coinbase=coinbase,
state_root=state_root,
transaction_root=transaction_root,
receipts_root=receipts_root,
bloom=bloom,
difficulty=difficulty,
block_number=block_number,
gas_limit=gas_limit,
gas_used=gas_used,
timestamp=timestamp,
extra_data=extra_data,
mix_hash=mix_hash,
nonce=nonce,
)
#!/usr/bin/env python
from rlp.sedes import big_endian_int, binary, Binary
from rlp import Serializable
from Cryptodome.Hash import keccak
def sha3_256(x):
return keccak.new(digest_bits=256, data=x.encode()).digest()
address = Binary.fixed_length(20, allow_empty=True)
def sha3(seed):
return sha3_256(str(seed))
class Transaction(Serializable):
fields = [
('nonce', big_endian_int),
('epoch', big_endian_int),
('txtype', big_endian_int),
('to', address),
('value', big_endian_int),
('maxfee', big_endian_int),
('tips', big_endian_int),
('data', binary),
]
def __init__(self, nonce, epoch, txtype, to, value, maxfee, tips, data):
super(Transaction, self).__init__(
from rlp.sedes import (
BigEndianInt,
Binary,
)
from eth.constants import (
COLLATION_SIZE, )
address = Binary.fixed_length(20, allow_empty=True)
collation_body = Binary.fixed_length(COLLATION_SIZE)
hash32 = Binary.fixed_length(32)
int32 = BigEndianInt(32)
int256 = BigEndianInt(256)
trie_root = Binary.fixed_length(32, allow_empty=True)
if chain_id is None:
return transaction_dict
else:
return dict(transaction_dict, v=chain_id, r=0, s=0)
@curry
def fill_transaction_defaults(transaction):
return merge(TRANSACTION_DEFAULTS, transaction)
UNSIGNED_TRANSACTION_FIELDS = (
('nonce', big_endian_int),
('gasPrice', big_endian_int),
('gas', big_endian_int),
('to', Binary.fixed_length(20, allow_empty=True)),
('value', big_endian_int),
('data', binary),
)
class Transaction(HashableRLP):
fields = UNSIGNED_TRANSACTION_FIELDS + (
('v', big_endian_int),
('r', big_endian_int),
('s', big_endian_int),
)
class UnsignedTransaction(HashableRLP):
fields = UNSIGNED_TRANSACTION_FIELDS
class BlockHeader(rlp.Serializable):
fields = [('parent_hash', hash32), ('uncles_hash', hash32),
('coinbase', address), ('state_root', trie_root),
('transaction_root', trie_root), ('receipt_root', trie_root),
('bloom', int256), ('difficulty', big_endian_int),
('block_number', big_endian_int), ('gas_limit', big_endian_int),
('gas_used', big_endian_int), ('timestamp', big_endian_int),
('extra_data', binary), ('mix_hash', binary),
('nonce', Binary(8, allow_empty=True))]
def __init__(self,
difficulty,
block_number,
gas_limit,
timestamp=None,
coinbase=ZERO_ADDRESS,
parent_hash=ZERO_HASH32,
uncles_hash=EMPTY_UNCLE_HASH,
state_root=BLANK_ROOT_HASH,
transaction_root=BLANK_ROOT_HASH,
receipt_root=BLANK_ROOT_HASH,
bloom=0,
gas_used=0,
extra_data=b'',
mix_hash=ZERO_HASH32,
nonce=GENESIS_NONCE):
if timestamp is None:
timestamp = int(time.time())
super(BlockHeader, self).__init__(
parent_hash=parent_hash,
uncles_hash=uncles_hash,
coinbase=coinbase,
state_root=state_root,
transaction_root=transaction_root,
receipt_root=receipt_root,
bloom=bloom,
difficulty=difficulty,
block_number=block_number,
gas_limit=gas_limit,
gas_used=gas_used,
timestamp=timestamp,
extra_data=extra_data,
mix_hash=mix_hash,
nonce=nonce,
)
@property
def hash(self):
return keccak(rlp.encode(self))
@property
def mining_hash(self):
return keccak(
rlp.encode(self, BlockHeader.exclude(['mix_hash', 'nonce'])))
@property
def hex_hash(self):
return encode_hex(self.hash)
@classmethod
def from_parent(cls,
parent,
gas_limit,
difficulty,
coinbase=ZERO_ADDRESS,
timestamp=None,
nonce=None,
extra_data=None):
"""
Initialize a new block header with the `parent` header as the block's
parent hash.
"""
if timestamp is None:
timestamp = int(time.time())
header_kwargs = {
'parent_hash': parent.hash,
'coinbase': coinbase,
'state_root': parent.state_root,
'gas_limit': gas_limit,
'difficulty': difficulty,
'block_number': parent.block_number + 1,
'timestamp': timestamp,
}
if nonce is not None:
header_kwargs['nonce'] = nonce
if extra_data is not None:
header_kwargs['extra_data'] = extra_data
header = cls(**header_kwargs)
return header
class TypedTransaction(SignedTransactionMethods, SignedTransactionAPI,
TransactionDecoderAPI):
rlp_type = Binary(min_length=1) # must have at least one byte for the type
_inner: SignedTransactionAPI
decoders: Dict[int, Type[TransactionDecoderAPI]] = {
ACCESS_LIST_TRANSACTION_TYPE: AccessListPayloadDecoder,
}
def __init__(self, type_id: int,
proxy_target: SignedTransactionAPI) -> None:
self.type_id = type_id
self._inner = proxy_target
@classmethod
def get_payload_codec(cls, type_id: int) -> Type[TransactionDecoderAPI]:
if type_id in cls.decoders:
return cls.decoders[type_id]
elif type_id in VALID_TRANSACTION_TYPES:
raise UnrecognizedTransactionType(type_id,
"Unknown transaction type")
else:
raise ValidationError(
f"Cannot build typed transaction with {hex(type_id)} >= 0x80")
def encode(self) -> bytes:
return self._type_byte + self._inner.encode()
@classmethod
def decode(cls, encoded: bytes) -> SignedTransactionAPI:
type_id = to_int(encoded[0])
payload = encoded[1:]
payload_codec = cls.get_payload_codec(type_id)
inner_transaction = payload_codec.decode(payload)
return cls(type_id, inner_transaction)
@classmethod
def serialize(cls, obj: 'TypedTransaction') -> DecodedZeroOrOneLayerRLP:
encoded = obj.encode()
return cls.rlp_type.serialize(encoded)
@classmethod
def deserialize(
cls, encoded_unchecked: DecodedZeroOrOneLayerRLP
) -> SignedTransactionAPI:
# binary checks a few basics, like the length of the bytes
encoded = cls.rlp_type.deserialize(encoded_unchecked)
return cls.decode(encoded)
@cached_property
def _type_byte(self) -> bytes:
return to_bytes(self.type_id)
@property
def chain_id(self) -> int:
return self._inner.chain_id
@property
def nonce(self) -> int:
return self._inner.nonce
@property
def gas_price(self) -> int:
return self._inner.gas_price
@property
def gas(self) -> int:
return self._inner.gas
@property
def to(self) -> Address:
return self._inner.to
@property
def value(self) -> int:
return self._inner.value
@property
def data(self) -> bytes:
return self._inner.data
@property
def y_parity(self) -> int:
return self._inner.y_parity
@property
def r(self) -> int:
return self._inner.r
@property
def s(self) -> int:
return self._inner.s
@property
def access_list(self) -> Sequence[Tuple[Address, Sequence[int]]]:
return self._inner.access_list
def get_sender(self) -> Address:
return self._inner.get_sender()
def get_message_for_signing(self) -> bytes:
return self._inner.get_message_for_signing()
def check_signature_validity(self) -> None:
self._inner.check_signature_validity()
@cached_property
def hash(self) -> Hash32:
return keccak(self.encode())
def get_intrinsic_gas(self) -> int:
return self._inner.get_intrinsic_gas()
def copy(self, **overrides: Any) -> 'TypedTransaction':
inner_copy = self._inner.copy(**overrides)
return type(self)(self.type_id, inner_copy)
def __eq__(self, other: Any) -> bool:
if not isinstance(other, TypedTransaction):
return False
else:
return self.type_id == other.type_id and self._inner == other._inner
def make_receipt(
self, status: bytes, gas_used: int,
log_entries: Tuple[Tuple[bytes, Tuple[int, ...], bytes], ...]
) -> ReceiptAPI:
inner_receipt = self._inner.make_receipt(status, gas_used, log_entries)
return TypedReceipt(ACCESS_LIST_TRANSACTION_TYPE, inner_receipt)
def __hash__(self) -> int:
return hash((self.type_id, self._inner))
class Denoms():
def __init__(self):
self.wei = 1
self.babbage = 10**3
self.lovelace = 10**6
self.shannon = 10**9
self.szabo = 10**12
self.finney = 10**15
self.ether = 10**18
self.turing = 2**256
denoms = Denoms()
address = Binary.fixed_length(20, allow_empty=True)
int20 = BigEndianInt(20)
int32 = BigEndianInt(32)
int256 = BigEndianInt(256)
hash32 = Binary.fixed_length(32)
trie_root = Binary.fixed_length(32, allow_empty=True)
class bcolors:
HEADER = '\033[95m'
OKBLUE = '\033[94m'
OKGREEN = '\033[92m'
WARNING = '\033[91m'
FAIL = '\033[91m'
ENDC = '\033[0m'
BOLD = '\033[1m'
class BlockHeader(rlp.Serializable, BlockHeaderAPI):
fields = [('parent_hash', hash32), ('uncles_hash', hash32),
('coinbase', address), ('state_root', trie_root),
('transaction_root', trie_root), ('receipt_root', trie_root),
('bloom', uint256), ('difficulty', big_endian_int),
('block_number', big_endian_int), ('gas_limit', big_endian_int),
('gas_used', big_endian_int), ('timestamp', big_endian_int),
('extra_data', binary), ('mix_hash', binary),
('nonce', Binary(8, allow_empty=True))]
@overload
def __init__(self, **kwargs: HeaderParams) -> None:
...
@overload # noqa: F811
def __init__(self,
difficulty: int,
block_number: BlockNumber,
gas_limit: int,
timestamp: int = None,
coinbase: Address = ZERO_ADDRESS,
parent_hash: Hash32 = ZERO_HASH32,
uncles_hash: Hash32 = EMPTY_UNCLE_HASH,
state_root: Hash32 = BLANK_ROOT_HASH,
transaction_root: Hash32 = BLANK_ROOT_HASH,
receipt_root: Hash32 = BLANK_ROOT_HASH,
bloom: int = 0,
gas_used: int = 0,
extra_data: bytes = b'',
mix_hash: Hash32 = ZERO_HASH32,
nonce: bytes = GENESIS_NONCE) -> None:
...
def __init__(
self, # type: ignore # noqa: F811
difficulty: int,
block_number: BlockNumber,
gas_limit: int,
timestamp: int = None,
coinbase: Address = ZERO_ADDRESS,
parent_hash: Hash32 = ZERO_HASH32,
uncles_hash: Hash32 = EMPTY_UNCLE_HASH,
state_root: Hash32 = BLANK_ROOT_HASH,
transaction_root: Hash32 = BLANK_ROOT_HASH,
receipt_root: Hash32 = BLANK_ROOT_HASH,
bloom: int = 0,
gas_used: int = 0,
extra_data: bytes = b'',
mix_hash: Hash32 = ZERO_HASH32,
nonce: bytes = GENESIS_NONCE) -> None:
if timestamp is None:
timestamp = int(time.time())
super().__init__(
parent_hash=parent_hash,
uncles_hash=uncles_hash,
coinbase=coinbase,
state_root=state_root,
transaction_root=transaction_root,
receipt_root=receipt_root,
bloom=bloom,
difficulty=difficulty,
block_number=block_number,
gas_limit=gas_limit,
gas_used=gas_used,
timestamp=timestamp,
extra_data=extra_data,
mix_hash=mix_hash,
nonce=nonce,
)
def __str__(self) -> str:
return f'<BlockHeader #{self.block_number} {encode_hex(self.hash)[2:10]}>'
_hash = None
@property
def hash(self) -> Hash32:
if self._hash is None:
self._hash = keccak(rlp.encode(self))
return self._hash
@property
def mining_hash(self) -> Hash32:
return keccak(rlp.encode(self[:-2], MiningHeader))
@property
def hex_hash(self) -> str:
return encode_hex(self.hash)
@classmethod
def from_parent(cls,
parent: BlockHeaderAPI,
gas_limit: int,
difficulty: int,
timestamp: int,
coinbase: Address = ZERO_ADDRESS,
nonce: bytes = None,
extra_data: bytes = None,
transaction_root: bytes = None,
receipt_root: bytes = None) -> 'BlockHeader':
"""
Initialize a new block header with the `parent` header as the block's
parent hash.
"""
header_kwargs: Dict[str, HeaderParams] = {
'parent_hash': parent.hash,
'coinbase': coinbase,
'state_root': parent.state_root,
'gas_limit': gas_limit,
'difficulty': difficulty,
'block_number': parent.block_number + 1,
'timestamp': timestamp,
}
if nonce is not None:
header_kwargs['nonce'] = nonce
if extra_data is not None:
header_kwargs['extra_data'] = extra_data
if transaction_root is not None:
header_kwargs['transaction_root'] = transaction_root
if receipt_root is not None:
header_kwargs['receipt_root'] = receipt_root
header = cls(**header_kwargs)
return header
@property
def is_genesis(self) -> bool:
# if removing the block_number == 0 test, consider the validation consequences.
# validate_header stops trying to check the current header against a parent header.
# Can someone trick us into following a high difficulty header with genesis parent hash?
return self.parent_hash == GENESIS_PARENT_HASH and self.block_number == 0
from rlp.sedes import (
BigEndianInt,
Binary,
)
hash32 = Binary.fixed_length(32)
uint64 = BigEndianInt(64)
# Copyright (c) 2015 Heiko Hees
from utils import big_endian_to_int, sha3, isaddress, ishash, int_to_big_endian, pex
import rlp
from rlp.sedes import Binary
from rlp.sedes import big_endian_int as t_int
from rlp.sedes import binary as t_binary
from rlp.sedes import List as t_list
t_address = Binary.fixed_length(20, allow_empty=False)
t_hash = Binary.fixed_length(32, allow_empty=False)
t_hash_optional = Binary.fixed_length(32, allow_empty=True)
class RLPHashable(rlp.Serializable):
rlp_ = None
@property
def hash(self):
return sha3(getattr(self, 'rlp_', None) or rlp.encode(self))
def __eq__(self, other):
return isinstance(other, self.__class__) and self.hash == other.hash
def __hash__(self):
return big_endian_to_int(self.hash)
def __ne__(self, other):
return not self.__eq__(other)
def __repr__(self):
class Log(rlp.Serializable):
fields = [
('address', Binary.fixed_length(20, allow_empty=True)),
('topics', CountableList(BigEndianInt(32))),
('data', Binary())
]
return hash((
self.signature,
self.sequence_number,
tuple(self.items()),
))
def __repr__(self) -> str:
base64_rlp = base64.urlsafe_b64encode(rlp.encode(self))
unpadded_base64_rlp = base64_rlp.rstrip(b"=")
return "".join((
ENR_REPR_PREFIX,
unpadded_base64_rlp.decode("ASCII"),
))
IDENTITY_SCHEME_ENR_KEY = b"id"
ENR_KEY_SEDES_MAPPING = {
b"id": binary,
b"secp256k1": Binary.fixed_length(33),
b"ip": Binary.fixed_length(IP_V4_SIZE),
b"tcp": big_endian_int,
b"udp": big_endian_int,
b"ip6": Binary.fixed_length(IP_V6_SIZE),
b"tcp6": big_endian_int,
b"udp6": big_endian_int,
}
# Must use raw for values with an unknown key as they may be lists or individual values.
FALLBACK_ENR_VALUE_SEDES = raw
from p2p.discv5.constants import (
TOPIC_HASH_SIZE,
IP_V4_SIZE,
IP_V6_SIZE,
)
# https://github.com/python/mypy/issues/5264#issuecomment-399407428
if TYPE_CHECKING:
MessageTypeRegistryBaseType = UserDict[int, Type["BaseMessage"]]
else:
MessageTypeRegistryBaseType = UserDict
#
# Custom sedes objects
#
topic_sedes = Binary.fixed_length(TOPIC_HASH_SIZE)
class IPAddressSedes(Binary):
def __init__(self) -> None:
super().__init__()
def is_valid_length(self, length: int) -> bool:
return length in (IP_V4_SIZE, IP_V6_SIZE)
ip_address_sedes = IPAddressSedes()
class MessageTypeRegistry(MessageTypeRegistryBaseType):
def register(
def is_bitcoin_available():
try:
import bitcoin # noqa
except ImportError:
return False
else:
return True
# in the yellow paper it is specified that s should be smaller than secpk1n (eq.205)
secpk1n = 115792089237316195423570985008687907852837564279074904382605163141518161494337
TT256 = 2 ** 256
address_sedes = Binary.fixed_length(20, allow_empty=True)
class Transaction(rlp.Serializable):
"""
# Derived from `pyethereum.transaction.Transaction`
A transaction is stored as:
[nonce, gasprice, startgas, to, value, data, v, r, s]
nonce is the number of transactions already sent by that account, encoded
in binary form (eg. 0 -> '', 7 -> '\x07', 1000 -> '\x03\xd8').
(v,r,s) is the raw Electrum-style signature of the transaction without the
signature made with the private key corresponding to the sending account,
with 0 <= v <= 3. From an Electrum-style signature (65 bytes) it is
class BlockHeader(rlp.Serializable):
fields = [('parent_hash', hash32), ('uncles_hash', hash32),
('coinbase', address), ('state_root', trie_root),
('transaction_root', trie_root), ('receipt_root', trie_root),
('bloom', int256), ('difficulty', big_endian_int),
('block_number', big_endian_int), ('gas_limit', big_endian_int),
('gas_used', big_endian_int), ('timestamp', big_endian_int),
('extra_data', binary), ('mix_hash', binary),
('nonce', Binary(8, allow_empty=True))]
@overload
def __init__(self, **kwargs: HeaderParams) -> None:
...
@overload # noqa: F811
def __init__(self,
difficulty: int,
block_number: int,
gas_limit: int,
timestamp: int = None,
coinbase: Address = ZERO_ADDRESS,
parent_hash: Hash32 = ZERO_HASH32,
uncles_hash: Hash32 = EMPTY_UNCLE_HASH,
state_root: Hash32 = BLANK_ROOT_HASH,
transaction_root: Hash32 = BLANK_ROOT_HASH,
receipt_root: Hash32 = BLANK_ROOT_HASH,
bloom: int = 0,
gas_used: int = 0,
extra_data: bytes = b'',
mix_hash: Hash32 = ZERO_HASH32,
nonce: bytes = GENESIS_NONCE) -> None:
...
def __init__(
self, # noqa: F811
difficulty,
block_number,
gas_limit,
timestamp=None,
coinbase=ZERO_ADDRESS,
parent_hash=ZERO_HASH32,
uncles_hash=EMPTY_UNCLE_HASH,
state_root=BLANK_ROOT_HASH,
transaction_root=BLANK_ROOT_HASH,
receipt_root=BLANK_ROOT_HASH,
bloom=0,
gas_used=0,
extra_data=b'',
mix_hash=ZERO_HASH32,
nonce=GENESIS_NONCE):
if timestamp is None:
timestamp = int(time.time())
super(BlockHeader, self).__init__(
parent_hash=parent_hash,
uncles_hash=uncles_hash,
coinbase=coinbase,
state_root=state_root,
transaction_root=transaction_root,
receipt_root=receipt_root,
bloom=bloom,
difficulty=difficulty,
block_number=block_number,
gas_limit=gas_limit,
gas_used=gas_used,
timestamp=timestamp,
extra_data=extra_data,
mix_hash=mix_hash,
nonce=nonce,
)
def __repr__(self) -> str:
return '<BlockHeader #{0} {1}>'.format(
self.block_number,
encode_hex(self.hash)[2:10],
)
_hash = None
@property
def hash(self) -> Hash32:
if self._hash is None:
self._hash = keccak(rlp.encode(self))
return self._hash
@property
def mining_hash(self) -> Hash32:
return keccak(rlp.encode(self[:-2], MiningHeader))
@property
def hex_hash(self):
return encode_hex(self.hash)
@classmethod
def from_parent(cls,
parent: 'BlockHeader',
gas_limit: int,
difficulty: int,
timestamp: int,
coinbase: Address = ZERO_ADDRESS,
nonce: bytes = None,
extra_data: bytes = None,
transaction_root: bytes = None,
receipt_root: bytes = None) -> 'BlockHeader':
"""
Initialize a new block header with the `parent` header as the block's
parent hash.
"""
header_kwargs = {
'parent_hash': parent.hash,
'coinbase': coinbase,
'state_root': parent.state_root,
'gas_limit': gas_limit,
'difficulty': difficulty,
'block_number': parent.block_number + 1,
'timestamp': timestamp,
}
if nonce is not None:
header_kwargs['nonce'] = nonce
if extra_data is not None:
header_kwargs['extra_data'] = extra_data
if transaction_root is not None:
header_kwargs['transaction_root'] = transaction_root
if receipt_root is not None:
header_kwargs['receipt_root'] = receipt_root
header = cls(**header_kwargs)
return header
def create_execution_context(
self, prev_hashes: Union[Tuple[bytes],
Tuple[bytes, bytes]]) -> ExecutionContext:
return ExecutionContext(
coinbase=self.coinbase,
timestamp=self.timestamp,
block_number=self.block_number,
difficulty=self.difficulty,
gas_limit=self.gas_limit,
prev_hashes=prev_hashes,
)
def has_sig(self):
if Binary.is_valid_type(self.signature) and sig65.is_valid_length(
len(self.signature)):
return True
else:
return False
from rlp.sedes import (
BigEndianInt,
Binary,
)
address = Binary.fixed_length(20, allow_empty=True)
hash32 = Binary.fixed_length(32)
int32 = BigEndianInt(32)
int256 = BigEndianInt(256)
trie_root = Binary.fixed_length(32, allow_empty=True)
def test_binary():
b1 = Binary()
f = {
'': b'',
'asdf': b'asdf',
('\x00' * 20): (b'\x00' * 20),
'fdsa': b'fdsa'
}
for k in f:
assert b1.serialize(k) == f[k]
for d in ([], 5, str):
with pytest.raises(SerializationError):
b1.serialize(d)
b2 = Binary.fixed_length(5)
f = {
'asdfg': b'asdfg',
b'\x00\x01\x02\x03\x04': b'\x00\x01\x02\x03\x04',
utils.str_to_bytes('ababa'): b'ababa'
}
for k in f:
assert b2.serialize(k) == f[k]
for d in ('asdf', 'asdfgh', '', 'bababa'):
with pytest.raises(SerializationError):
b2.serialize(d)
b3 = Binary(2, 4)
f = {
'as': b'as',
'dfg': b'dfg',
'hjkl': b'hjkl',
b'\x00\x01\x02': b'\x00\x01\x02'
}
for k in f:
assert b3.serialize(k) == f[k]
for d in ('', 'a', 'abcde', 'รครครค'):
with pytest.raises(SerializationError):
b3.serialize(d)
b4 = Binary(min_length=3)
f = {'abc': b'abc', 'abcd': b'abcd', ('x' * 132): (b'x' * 132)}
for k in f:
assert b4.serialize(k) == f[k]
for d in ('ab', '', 'a', 'xy'):
with pytest.raises(SerializationError):
b4.serialize(d)
b5 = Binary(max_length=3)
f = {'': b'', 'ab': b'ab', 'abc': b'abc'}
for k in f:
assert b5.serialize(k) == f[k]
for d in ('abcd', 'vwxyz', 'a' * 32):
with pytest.raises(SerializationError):
b5.serialize(d)
b6 = Binary(min_length=3, max_length=5, allow_empty=True)
f = {'': b'', 'abc': b'abc', 'abcd': b'abcd', 'abcde': b'abcde'}
for k in f:
assert b6.serialize(k) == f[k]
for d in ('a', 'ab', 'abcdef', 'abcdefgh' * 10):
with pytest.raises(SerializationError):
b6.serialize(d)