def add_log_entry(self, account: Address, topics: Tuple[int, ...], data: bytes) -> None:
validate_canonical_address(account, title="Log entry address")
for topic in topics:
validate_uint256(topic, title="Log entry topic")
validate_is_bytes(data, title="Log entry data")
self._log_entries.append(
(self.transaction_context.get_next_log_counter(), account, topics, data))
def extend_memory(self, start_position: int, size: int) -> None:
validate_uint256(start_position, title="Memory start position")
validate_uint256(size, title="Memory size")
before_size = ceil32(len(self._memory))
after_size = ceil32(start_position + size)
before_cost = memory_gas_cost(before_size)
after_cost = memory_gas_cost(after_size)
if self.logger.show_debug2:
self.logger.debug2(
"MEMORY: size (%s -> %s) | cost (%s -> %s)",
before_size,
after_size,
before_cost,
after_cost,
)
if size:
if before_cost < after_cost:
gas_fee = after_cost - before_cost
self._gas_meter.consume_gas(gas_fee,
reason=" ".join((
"Expanding memory",
str(before_size),
"->",
str(after_size),
)))
self._memory.extend(start_position, size)
def set_vm(self, block_identifier='latest'):
_block = None
if self.w3:
if block_identifier == 'latest':
block_identifier = self.w3.eth.blockNumber
validate_uint256(block_identifier)
_block = self.w3.eth.getBlock(block_identifier)
if not _block:
if block_identifier in [
HOMESTEAD_MAINNET_BLOCK, BYZANTIUM_MAINNET_BLOCK,
PETERSBURG_MAINNET_BLOCK
]:
_block = self.get_cached_block_by_id(block_identifier)
else:
self.logger.error("Unknown block identifier.")
sys.exit(-4)
block_header = BlockHeader(
difficulty=_block.difficulty,
block_number=_block.number,
gas_limit=_block.gasLimit,
timestamp=_block.timestamp,
coinbase=ZERO_ADDRESS, # default value
parent_hash=_block.parentHash,
uncles_hash=_block.uncles,
state_root=_block.stateRoot,
transaction_root=_block.transactionsRoot,
receipt_root=_block.receiptsRoot,
bloom=0, # default value
gas_used=_block.gasUsed,
extra_data=_block.extraData,
mix_hash=_block.mixHash,
nonce=_block.nonce)
self.vm = self.chain.get_vm(block_header)
def __init__(self, start_gas: int) -> None:
validate_uint256(start_gas, title="Start Gas")
self.start_gas = start_gas
self.gas_remaining = self.start_gas
self.gas_refunded = 0
def extend_memory(self, start_position: int, size: int) -> None:
"""
Extend the size of the memory to be at minimum ``start_position + size``
bytes in length. Raise `eth.exceptions.OutOfGas` if there is not enough
gas to pay for extending the memory.
"""
validate_uint256(start_position, title="Memory start position")
validate_uint256(size, title="Memory size")
before_size = ceil32(len(self._memory))
after_size = ceil32(start_position + size)
before_cost = memory_gas_cost(before_size)
after_cost = memory_gas_cost(after_size)
self.logger.trace(
"MEMORY: size (%s -> %s) | cost (%s -> %s)",
before_size,
after_size,
before_cost,
after_cost,
)
if size:
if before_cost < after_cost:
gas_fee = after_cost - before_cost
self._gas_meter.consume_gas(gas_fee,
reason=" ".join((
"Expanding memory",
str(before_size),
"->",
str(after_size),
)))
self._memory.extend(start_position, size)
def set_storage(self, address: Address, slot: int, value: int) -> None:
validate_uint256(value, title="Storage Value")
validate_uint256(slot, title="Storage Slot")
validate_canonical_address(address, title="Storage Address")
if address not in self._storage_emulator:
self._storage_emulator[address] = dict()
self._storage_emulator[address][slot] = value
def __init__(self, chain_id: Optional[int]) -> None:
if chain_id is None:
chain_id = 0 # Default value (invalid for public networks)
# Due to EIP-155's definition of Chain ID,
# the number that needs to be RLP encoded is `CHAINID * 2 + 36`
validate_uint256(chain_id)
self._chain_id = chain_id
def set_storage(self, address: Address, slot: int, value: int) -> None:
validate_uint256(value, title="Storage Value")
validate_uint256(slot, title="Storage Slot")
validate_canonical_address(address, title="Storage Address")
account_store = self._get_address_store(address)
self._dirty_accounts.add(address)
account_store.set(slot, value)
def get_storage(self,
address: Address,
slot: int,
from_journal: bool = True) -> int:
validate_canonical_address(address, title="Storage Address")
validate_uint256(slot, title="Storage Slot")
account_store = self._get_address_store(address)
return account_store.get(slot, from_journal)
def get_canonical_block_by_number(self, block_number: BlockNumber) -> BaseBlock:
"""
Returns the block with the given number in the canonical chain.
Raises BlockNotFound if there's no block with the given number in the
canonical chain.
"""
validate_uint256(block_number, title="Block Number")
return self.get_block_by_hash(self.chaindb.get_canonical_block_hash(block_number))
def __init__(self,
start_gas: int,
refund_strategy: RefundStrategy = default_refund_strategy) -> None:
validate_uint256(start_gas, title="Start Gas")
self.refund_strategy = refund_strategy
self.start_gas = start_gas
self.gas_remaining = self.start_gas
self.gas_refunded = 0
def write(self, start_position: int, size: int, value: bytes) -> None:
if size:
validate_uint256(start_position)
validate_uint256(size)
validate_is_bytes(value)
validate_length(value, length=size)
validate_lte(start_position + size, maximum=len(self))
for idx, v in enumerate(value):
self._bytes[start_position + idx] = v
def validate(self) -> None:
validate_uint256(self.chain_id, title="Transaction.chain_id")
validate_uint256(self.nonce, title="Transaction.nonce")
validate_uint256(self.gas_price, title="Transaction.gas_price")
validate_uint256(self.gas, title="Transaction.gas")
if self.to != CREATE_CONTRACT_ADDRESS:
validate_canonical_address(self.to, title="Transaction.to")
validate_uint256(self.value, title="Transaction.value")
validate_is_bytes(self.data, title="Transaction.data")
validate_is_transaction_access_list(self.access_list)
def __init__(self,
gas: int,
to: Address,
sender: Address,
value: int,
data: BytesOrView,
code: bytes,
depth: int = 0,
create_address: Address = None,
code_address: Address = None,
should_transfer_value: bool = True,
is_static: bool = False) -> None:
validate_uint256(gas, title="Message.gas")
self.gas: int = gas
if to != CREATE_CONTRACT_ADDRESS:
validate_canonical_address(to, title="Message.to")
self.to = to
validate_canonical_address(sender, title="Message.sender")
self.sender = sender
validate_uint256(value, title="Message.value")
self.value = value
validate_is_bytes_or_view(data, title="Message.data")
self.data = data
validate_is_integer(depth, title="Message.depth")
validate_gte(depth, minimum=0, title="Message.depth")
self.depth = depth
validate_is_bytes(code, title="Message.code")
self.code = code
if create_address is not None:
validate_canonical_address(create_address,
title="Message.storage_address")
self.storage_address = create_address
if code_address is not None:
validate_canonical_address(code_address,
title="Message.code_address")
self.code_address = code_address
validate_is_boolean(should_transfer_value,
title="Message.should_transfer_value")
self.should_transfer_value = should_transfer_value
validate_is_boolean(is_static, title="Message.is_static")
self.is_static = is_static
def get_storage(self, address, slot):
validate_canonical_address(address, title="Storage Address")
validate_uint256(slot, title="Storage Slot")
account = self._get_account(address)
storage = HashTrie(HexaryTrie(self._journaldb, account.storage_root))
slot_as_key = pad32(int_to_big_endian(slot))
if slot_as_key in storage:
encoded_value = storage[slot_as_key]
return rlp.decode(encoded_value, sedes=rlp.sedes.big_endian_int)
else:
return 0
def set_storage(self, address: Address, slot: int, value: int) -> None:
validate_uint256(value, title="Storage Value")
validate_uint256(slot, title="Storage Slot")
validate_canonical_address(address, title="Storage Address")
account = self._get_account(address)
storage = HashTrie(HexaryTrie(self._journaldb, account.storage_root))
slot_as_key = pad32(int_to_big_endian(slot))
if value:
encoded_value = rlp.encode(value)
storage[slot_as_key] = encoded_value
else:
del storage[slot_as_key]
self._set_account(address, account.copy(storage_root=storage.root_hash))
def write(self, start_position: int, size: int, value: bytes) -> None:
"""
Write `value` into memory.
"""
if size:
validate_uint256(start_position)
validate_uint256(size)
validate_is_bytes(value)
validate_length(value, length=size)
validate_lte(start_position + size, maximum=len(self))
if len(self._bytes) < start_position + size:
self._bytes.extend(
itertools.repeat(
0,
len(self._bytes) - (start_position + size),
))
for idx, v in enumerate(value):
self._bytes[start_position + idx] = v
def get_storage(self,
address: Address,
slot: int,
from_journal: bool = True) -> int:
validate_canonical_address(address, title="Storage Address")
validate_uint256(slot, title="Storage Slot")
if address in self._storage_emulator and slot in self._storage_emulator[
address] or not self._remote:
try:
return self._storage_emulator[address][slot]
except KeyError:
return 0
else:
result = self._remote.getStorageAt(address, slot, "latest")
result = to_int(result.hex())
self.set_storage(address, slot, result)
if self.snapshot != None:
if address not in self.snapshot["storage"]:
self.snapshot["storage"][address] = dict()
self.snapshot["storage"][address][slot] = result
return result
def validate(self) -> None:
validate_uint256(self.nonce, title="Transaction.nonce")
validate_is_integer(self.gas_price, title="Transaction.gas_price")
validate_uint256(self.gas, title="Transaction.gas")
if self.to != CREATE_CONTRACT_ADDRESS:
validate_canonical_address(self.to, title="Transaction.to")
validate_uint256(self.value, title="Transaction.value")
validate_is_bytes(self.data, title="Transaction.data")
super().validate()
def __init__(self, gas_price: int, origin: Address) -> None:
validate_uint256(gas_price, title="TransactionContext.gas_price")
self._gas_price = gas_price
validate_canonical_address(origin, title="TransactionContext.origin")
self._origin = origin
self._log_counter = itertools.count()
def validate(self) -> None:
validate_uint256(self.nonce, title="Transaction.nonce")
validate_uint256(self.gas_price, title="Transaction.gas_price")
validate_uint256(self.gas, title="Transaction.gas")
if self.to != CREATE_CONTRACT_ADDRESS:
validate_canonical_address(self.to, title="Transaction.to")
validate_uint256(self.value, title="Transaction.value")
validate_is_bytes(self.data, title="Transaction.data")
validate_uint256(self.v, title="Transaction.v")
validate_uint256(self.r, title="Transaction.r")
validate_uint256(self.s, title="Transaction.s")
validate_lt_secpk1n(self.r, title="Transaction.r")
validate_gte(self.r, minimum=1, title="Transaction.r")
validate_lt_secpk1n(self.s, title="Transaction.s")
validate_gte(self.s, minimum=1, title="Transaction.s")
validate_gte(self.v, minimum=self.v_min, title="Transaction.v")
validate_lte(self.v, maximum=self.v_max, title="Transaction.v")
super().validate()
def set_nonce(self, address: Address, nonce: int) -> None:
validate_canonical_address(address, title="Storage Address")
validate_uint256(nonce, title="Nonce")
account = self._get_account(address)
self._set_account(address, account.copy(nonce=nonce))
def set_balance(self, address, balance):
validate_canonical_address(address, title="Storage Address")
validate_uint256(balance, title="Account Balance")
account = self._get_account(address)
self._set_account(address, account.copy(balance=balance))
def test_validate_uint256(value, is_valid):
if is_valid:
validate_uint256(value)
else:
with pytest.raises(ValidationError):
validate_uint256(value)
def get_canonical_block_by_number(self, block_number: BlockNumber) -> BlockAPI:
validate_uint256(block_number, title="Block Number")
return self.get_block_by_hash(self.chaindb.get_canonical_block_hash(block_number))
def get_block_by_blockid(self, block_identifier):
validate_uint256(block_identifier)
return self.w3.eth.getBlock(block_identifier)